Cooled CCD Archives - Modern Astronomy

QHY miniCAM8M Photometric Combo

Bernard Karpinski — Wed, 07 May 2025 11:46:08 +0000

QHY miniCAM8M Photometric Combo

Overview

At just over 4 inches in diameter and a few inches thick (IMX585), the new miniCAM8M Photometric Combo is a compact, high-resolution, high-performance, cooled imaging system capable of exceptional, high-quality deep space images as well as high-quality, high-resolution planetary images.

So often, compactness in astroimaging is achieved at the expense of some other critical feature found in multi-component cooled systems, such as sensor quality or thermoelectric cooling, etc. Such is not the case with the new miniCAM8. Based on Sony’s IMX585 8 MP sensor, the miniCAM8 includes full TE cooling capable of reaching a delta of -45℃ from ambient along with a built-in 8-position filter wheel for complete LRGB, photometric, planetary and narrowband imaging.

Features

High Near-Infrared Sensitivity

The IMX585 is a Sony Starvis II processor that enables high sensitivity and high dynamic range (HDR). It also improves sensitivity in the near-infrared range by approximately 1.7 times* compared to the IMX485. The new camera miniCAM8 has a maximum quantum efficiency of 60% in the near-infrared band and 92% in the visible wavelength band.

*This data is officially provided by Sony: https://www.sony-semicon.com/cn/news/2021/2021062901.html

BSI

One benefit of the back-illuminated CMOS structure is improved full-well capacity. This is particularly helpful for sensors with small pixels. In a typical front-illuminated sensor, photons from the target entering the photosensitive layer of the sensor must first pass through the metal wiring that is embedded just above the photosensitive layer. The wiring structure reflects some of the photons and reduces the efficiency of the sensor.

In the back-illuminated sensor, the light is allowed to enter the photosensitive surface from the reverse side. In this case, the sensor’s embedded wiring structure is below the photosensitive layer. As a result, more incoming photons strike the photosensitive layer, and more electrons are generated and captured in the pixel well. This ratio of photon to electron production is called quantum efficiency. The higher the quantum efficiency, the more efficient the sensor is at converting photons to electrons, and hence the more sensitive the sensor is to capturing an image of something dim.

Zero Amplify Glow

miniCAM8 is also a zero amplifer glow camera.

Anti-Dew Technology

Based on almost 20-year cooled camera design experience, the QHY cooled camera has implemented the fully dew control solutions. The optic window has a built-in dew heater, and the chamber is protected from internal humidity condensation. An electric heating board for the chamber window can prevent the formation of dew, and the sensor itself is kept dry with our silicon gel tube socket design for control of humidity within the sensor chamber.

Cooling

In addition to dual-stage TE cooling, QHYCCD implements proprietary technology in hardware to control the dark current noise.

Linearity HDR Mode

The native ADC of the IMX585 sensor is 12-bit. Compared to 16-bit, the 12-bit depth offers fewer bits, resulting in a relatively narrower dynamic range, which may lead to issues such as insufficient color gradation and potential information loss. During the product development of miniCAM8, QHYCCD merged high and low gain to extend the data to 16-bit. However, since this 16-bit depth is not native, a sudden shift in linearity might occur, affecting the smooth transition in images. To address this, QHYCCD developed the “Linearity HDR” mode, which uses an algorithm-based approach to correct image linearity through software, ensuring smoother transitions and richer color representation.

In the “Linearity HDR” mode, the full well is 46 ke-, while the read noise is only 1.0e-; the dynamic range reaches up to 46,300:1, equivalent to 93 dB or 15.5 stops.

Filters Introduction

The astronomical filters included with the miniCAM8 combos are custom-designed to match the specific characteristics of the cameras. The size is 19 mm * 12 mm * 1.1 mm. The filters are customized by XiMei Filters.

miniCAM8M Sloan Photometric filters: UGRIZ

Specification

Model	miniCAM8
CMOS Sensor	Sony IMX585
Mono/Color	Both Available
BSI/FSI	BSI
Sensor Size	1/1.2inch
Pixel Size	2.9μm*2.9μm
Total Pixel Area	3856*2180
Effective Pixels	8 MP
Full Well Capacity	54ke- Linearity HDR Mode: 46ke-
Readout Noise	0.76 – 7.8 e- Linearity HDR Mode: 1.0e-
Peak QE	M: 92% C: R: 82%; G: 87%; B: 75%
Dynamic Range	Linearity HDR mode: The dynamic range reaches up to 46,300:1, equivalent to 93 dB or 15.5 stops.
A/D	Dual 12-bit (output as 16-bit)
Full Frame Rates	Full Resolution: 41.5FPS@8bit，23.5FPS @16bit
ROI Frame Rates	Full Resolution 1080Lines, 82FPS@8bit, 47FPS@16bit；640Lines, 177FPS@8bit, 105FPS@16bit
Exposure Time Range	11μs-900sec
Shutter Type	Electronic Rolling Shutter
Built-in Image Buffer	512MB DDR3
Computer Interface	USB3.0
Telescope Interface	1.25，2 inch
Optic Window Type	AR+AR
Filter Wheel	Built-in 8-Position Carousel
Back Focal Length	17.5mm
Cooling System	Dual Stage TEC cooler: Long exposures (> 1 second) typically -45℃ below ambient
Weight	480g

Curves

The peak quantum efficiency of the miniCAM8M reaches 91.2% in the OIII band, 80.9% in the Ha band, 78.7% in the SII band, and 40.1% in the methane band.

The peak quantum efficiency of the miniCAM8C: R channel: 82%; G channel: 87%; B channel: 75%.

Mechanical Dimensions

Accessories

(LPF: Light Pollution Filter; HLP: Heavy Light Pollution Filter; FCE: Four-Channel Enhancement Filter)

A planetary filters set is also available

User’s Review

User Guide: miniCAM8 Filter Wheel Installation

You can also refer to the review video in the link for the filter installation process: https://youtu.be/N-sjPw5zgsM?si=5dNP4vI1J-FokBxI

User Guide: miniCAM8 Filter Wheel Driver Installation

User Guide: HDR Correction of miniCAM8/QHY5III585

FPGA version: 24-12-6 and its later version

SDK version: 24-12-26-12 and its later version

All-in-one version: 24.12.27.10 and its later version

HDR_correction will be on by default. (It is for 16-bit single frames and live, and not available for 8-bit.)

SharpCap version: 4.1.12311 and its later version

HDR Custom Control in SharpCap: “HDR_correction,” “HDR_L_K,” “HDR_L_b,” and “HDR_showKB”

HDR_L_K: stretch value of the low channel

HDR_L_b: offset value of the low channel

The two values influence the image linearity together.

You can manually set values of “HDR_L_k” and “HDR_L_b” by yourself when switching off the “HDR_correction.” But in general we recommend switching it on. Improper values setting will cause issues like image banding.

HDR_showKB: On: values will be shown on the top left of the image; Off: no values shown

User Guide: Start the Camera

Install “All-In-One” Driver&SDK Pack

Before Start: Input Voltage Requirements

The camera requires an input voltage between 11V and 13.8V. If the input voltage is too low the camera will stop functioning or it may reboot when the TEC power percent is high, causing a drain on the power. Therefore, please make sure the input voltage arrived to the camera is adequate. 12V is the best but please note that a 12V cable that is very long or a cable with small conductor wire may exhibit enough resistance to cause a voltage drop between the power supply and the camera. The formular is: V(drop) = I * R (cable). It is advised that a very long 12V power cable not be used. It is better to place the 12V AC adapter closer to the camera.

First connect the 12V power supply, then connect the camera to your computer via the USB3.0 cable. Make sure the camera is plugged in before connecting the camera to the computer, otherwise the camera will not be recognized. When you connect the camera for the first time, the system discovers the new device and looks for drivers for it. You can skip the online search step by clicking “Skip obtaining the driver software from Windows Update” and the computer will automatically find the driver locally and install it. If we take the 5IIISeries driver as an example (shown below), after the driver software is successfully installed, you will see QHY5IIISeries_IO in the device manager.

Please note that the input voltage cannot be lower than 11.5v, otherwise the device will be unable to work normally.

Install “All-In-One” System Pack

All-in-one Pack supports most QHYCCD models only except PoleMaster and several discontinued CCD cameras.

Download Page: https://www.qhyccd.com/download/

Video Tutorial: https://www.youtube.com/embed/mZDxIK0GZRc?start=1

Since most of the contents of All-in-one package are plug-ins that support third-party software, the third-party capturing software that you want to use must be installed before the All-in-one package. Otherwise the program will report an error.
ALL-IN-ONE Pack contains:
- System Driver, which is necessary for the camera operation and must be installed.
- WDM Broadcast Driver, which can provide a live signal to Obs and other live software, you can install it if you have such needs like opeing a live show.
- EZCAP_QT , which is developed by QHYCCD and can be used in QHY devices tests, and management of updates. So even if you won’t use EZCAP_QT for capturing, we suggest you install it.
- Ascom driver, which is necessary for the camera used in Ascom (the latest version of Ascom is 6.6).
- The two sorts of Ascom CFW Drivers correspond to two methods of controling the filter wheel: USB control and camera serial control. It is recommended that both drivers should be installed if you have a filter wheel.
- CP210X_VCP is a serial driver. Some computers come with the driver, but the computer without the driver may be failed of controling the filter wheel.
- SDKs for Third-party Software: Just pick and install the corresponding SDK according to the software you want to use. Don’t forget to check whether the software you are using is 32-bit or 64-bit and select the right SDKs.
- SHARPCAP is also included in the pack, you can choose 32-bit or 64-bit to install. This is authorized by SHARPCAP.
- QT LIB is a plug-in to ensure that 64-bit software can exeuate normally on some computers with poor compatibility.
Difference between Stable version and Beta Version: Beta version is the latest version, which gives priority to support for the latest products (the stable version may not be compatible with those yet), and has some of the latest optimized ,but experimental features. The stable version is older than the beta version but more stable, so it is recommended for beginners who are not using the latest products.
Don’t let the camera connect to the computer during the All-in-one pack installation process; connect it to the computer after all the installation is complete.

Connect DSO Imaging Software (e.g. NINA)

Before using software, make sure you have connected the cooling camera to the 12V power supply and connected it to the computer with a USB3.0 data cable. If it’s an uncooled camera, 12V power is not needed. We recommend 64-bit Software, like SharpCAP x64 , N.I.N.A x64. etc., especially when you’re using 16bit cameras.

In NINA, you can select the device to connect to QHY Camera directly without ASCOM driver.

If connecting to the camera via ASCOM is desired, first make sure you have installed both the QHYCCD ASCOM Drivers and ASCOM Platform. Then you would select the appropriate camera driver under the ASCOM section. Then click the Connect icon. Here we take NINA as an example, but it’s similar to other software packages supporting ASCOM, like MaxDL, The SkyX, etc.

Connect Planetary Imaging Software (e.g. SharpCap)

Launch SharpCap. If the software and drivers mentioned above are installed successfully, the video image will appear automatically about 3 seconds after the software loads. You will also see the frame rate in the lower left corner of the software window as shown below.

If you have already started the SharpCap software before connecting the camera, in order to open the camera, click on the “camera” in the menu bar and then select the device.

Offset adjustment. When you completely block the camera (i.e., like taking a dark frame) you may find that the image is not really zero. Sometimes this will reduce the quality of the image contrast. You can get a better dark field by adjusting the offset. You can confirm this by opening the histogram as indicated in the figure below.

If you want to enter the 16-bit image mode, select the “RAW16” mode.

By selecting the “LX” mode you can expand the exposure setting range and take long exposures.

After cooling devices connected to the 12V power supply, the temperature control circuit will be activated. You can control the CMOS temperature by adjusting the settings in the figure below. Basically, you can control the temperature of CMOS by either adjusting “Cooler Power” or clicking “Auto” and setting “Target Temperature”. You can also see the CMOS temperature at the lower-left corner of the software window.

User Guide: Camera Maintenance

Drying the camera CMOS chamber

On the side of the front end of the camera, there is a drying port designed for use with a drying tube to dehumidify the CMOS sealed chamber. If moisture inside the CMOS chamber causes the sensor glass to fog up, you can connect a drying tube to this port for drying. Place effective silica gel desiccant in the drying tube and ensure it contains cotton to prevent dust particles from entering the CMOS chamber. Please refer to the connection instructions below.
Notes:
1. When installing the drying tube, please remove the front cover of the camera to prevent the sealing screws from falling out.
2. Turn off cooling before starting the drying process.

The post QHY miniCAM8M Photometric Combo appeared first on Modern Astronomy.

miniCAM8C Deep Sky Combo

Bernard Karpinski — Mon, 31 Mar 2025 19:23:53 +0000

Sample Images using the miniCAM8M Deepsky Combo and miniCAM8C Deep Sky Combo

VdB 62 Nebula

By Abdullah Al-Harbi

Camera: QHYCCD miniCAM8M Deepsky Combo

Telescope: Askar 600 ‎‏

Mount: HAE EC 69 ‎‏

Exposure: L 300*40, R 300*48, G 300*36, B 300*35, Ha 300*43

Total integration: 16.8 hours

Bortal class 5/6

The Rosette Nebula

By Luca Bartek

Camera: QHYCCD miniCAM8 Mono Deepsky Combo

Telescope: Askar FRA600

Exposure:
QHYCCD H-alpha 7nm: 38×600″(6h 20′)
QHYCCD OIII 7nm: 21×600″(3h 30′)
QHYCCD SII 7nm: 44×600″(7h 20′)

Integration: 17h 10′

Overview

At just over 4 inches in diameter and a few inches thick (IMX585), the new miniCAM8M Deep Sky Combo is a compact, high-resolution, high-performance, cooled imaging system capable of exceptional, high-quality deep space images as well as high-quality, high-resolution planetary images.

Features

High Near-Infrared Sensitivity

*This data is officially provided by Sony: https://www.sony-semicon.com/cn/news/2021/2021062901.html

BSI

Zero Amplify Glow

miniCAM8 is also a zero amplifer glow camera.

Anti-Dew Technology

Cooling

In addition to dual-stage TE cooling, QHYCCD implements proprietary technology in hardware to control the dark current noise.

Linearity HDR Mode

In the “Linearity HDR” mode, the full well is 46 ke-, while the read noise is only 1.0e-; the dynamic range reaches up to 46,300:1, equivalent to 93 dB or 15.5 stops.

Filters Introduction

The astronomical filters included with the miniCAM8 deepsky combos are custom-designed to match the specific characteristics of the cameras. The size is 19 mm * 12 mm * 1.1 mm. The LRGB and SHO narrowband filters for the miniCAM8M deepsky combo are customized by XiMei Filters. The LRGB filters have an optical density (OD) value of 3, while the narrowband filters have an OD value of 5.

The OD value, as a physical measure of the degree of light attenuation after passing through a filter, directly affects the filter’s ability to suppress unwanted light during imaging. A higher OD value indicates stronger suppression of stray light, effectively blocking most unnecessary light sources and thereby enhancing image contrast and detail clarity.

The filters provided with the miniCAM8C deepsky combo are customized by Optolong Optics. These include a light pollution filter, a heavy light pollution filter, a four-channel enhancement filter, and a UV/IR cut filter.

Specification

Model	miniCAM8
CMOS Sensor	Sony IMX585
Mono/Color	Both Available
BSI/FSI	BSI
Sensor Size	1/1.2inch
Pixel Size	2.9μm*2.9μm
Total Pixel Area	3856*2180
Effective Pixels	8 MP
Full Well Capacity	54ke- Linearity HDR Mode: 46ke-
Readout Noise	0.76 – 7.8 e- Linearity HDR Mode: 1.0e-
Peak QE	M: 92% C: R: 82%; G: 87%; B: 75%
Dynamic Range	Linearity HDR mode: The dynamic range reaches up to 46,300:1, equivalent to 93 dB or 15.5 stops.
A/D	Dual 12-bit (output as 16-bit)
Full Frame Rates	Full Resolution: 41.5FPS@8bit，23.5FPS @16bit
ROI Frame Rates	Full Resolution 1080Lines, 82FPS@8bit, 47FPS@16bit；640Lines, 177FPS@8bit, 105FPS@16bit
Exposure Time Range	11μs-900sec
Shutter Type	Electronic Rolling Shutter
Built-in Image Buffer	512MB DDR3
Computer Interface	USB3.0
Telescope Interface	1.25，2 inch
Optic Window Type	AR+AR
Filter Wheel	Built-in 8-Position Carousel
Back Focal Length	17.5mm
Cooling System	Dual Stage TEC cooler: Long exposures (> 1 second) typically -45℃ below ambient
Weight	480g

Curves

The peak quantum efficiency of the miniCAM8M reaches 91.2% in the OIII band, 80.9% in the Ha band, 78.7% in the SII band, and 40.1% in the methane band.

The peak quantum efficiency of the miniCAM8C: R channel: 82%; G channel: 87%; B channel: 75%.

Mechanical Dimensions

Accessories

(LPF: Light Pollution Filter; HLP: Heavy Light Pollution Filter; FCE: Four-Channel Enhancement Filter)

User’s Review

User Guide: miniCAM8 Filter Wheel Installation

You can also refer to the review video in the link for the filter installation process: https://youtu.be/N-sjPw5zgsM?si=5dNP4vI1J-FokBxI

User Guide: miniCAM8 Filter Wheel Driver Installation

User Guide: HDR Correction of miniCAM8/QHY5III585

FPGA version: 24-12-6 and its later version

SDK version: 24-12-26-12 and its later version

All-in-one version: 24.12.27.10 and its later version

HDR_correction will be on by default. (It is for 16-bit single frames and live, and not available for 8-bit.)

SharpCap version: 4.1.12311 and its later version

HDR Custom Control in SharpCap: “HDR_correction,” “HDR_L_K,” “HDR_L_b,” and “HDR_showKB”

HDR_L_K: stretch value of the low channel

HDR_L_b: offset value of the low channel

The two values influence the image linearity together.

HDR_showKB: On: values will be shown on the top left of the image; Off: no values shown

User Guide: Start the Camera

Install “All-In-One” Driver&SDK Pack

Before Start: Input Voltage Requirements

Please note that the input voltage cannot be lower than 11.5v, otherwise the device will be unable to work normally.

Install “All-In-One” System Pack

All-in-one Pack supports most QHYCCD models only except PoleMaster and several discontinued CCD cameras.

Download Page: https://www.qhyccd.com/download/

Video Tutorial: https://www.youtube.com/embed/mZDxIK0GZRc?start=1

Since most of the contents of All-in-one package are plug-ins that support third-party software, the third-party capturing software that you want to use must be installed before the All-in-one package. Otherwise the program will report an error.
ALL-IN-ONE Pack contains:
- System Driver, which is necessary for the camera operation and must be installed.
- WDM Broadcast Driver, which can provide a live signal to Obs and other live software, you can install it if you have such needs like opeing a live show.
- EZCAP_QT , which is developed by QHYCCD and can be used in QHY devices tests, and management of updates. So even if you won’t use EZCAP_QT for capturing, we suggest you install it.
- Ascom driver, which is necessary for the camera used in Ascom (the latest version of Ascom is 6.6).
- The two sorts of Ascom CFW Drivers correspond to two methods of controling the filter wheel: USB control and camera serial control. It is recommended that both drivers should be installed if you have a filter wheel.
- CP210X_VCP is a serial driver. Some computers come with the driver, but the computer without the driver may be failed of controling the filter wheel.
- SDKs for Third-party Software: Just pick and install the corresponding SDK according to the software you want to use. Don’t forget to check whether the software you are using is 32-bit or 64-bit and select the right SDKs.
- SHARPCAP is also included in the pack, you can choose 32-bit or 64-bit to install. This is authorized by SHARPCAP.
- QT LIB is a plug-in to ensure that 64-bit software can exeuate normally on some computers with poor compatibility.
Difference between Stable version and Beta Version: Beta version is the latest version, which gives priority to support for the latest products (the stable version may not be compatible with those yet), and has some of the latest optimized ,but experimental features. The stable version is older than the beta version but more stable, so it is recommended for beginners who are not using the latest products.
Don’t let the camera connect to the computer during the All-in-one pack installation process; connect it to the computer after all the installation is complete.

Connect DSO Imaging Software (e.g. NINA)

In NINA, you can select the device to connect to QHY Camera directly without ASCOM driver.

Connect Planetary Imaging Software (e.g. SharpCap)

If you have already started the SharpCap software before connecting the camera, in order to open the camera, click on the “camera” in the menu bar and then select the device.

If you want to enter the 16-bit image mode, select the “RAW16” mode.

By selecting the “LX” mode you can expand the exposure setting range and take long exposures.

User Guide: Camera Maintenance

Drying the camera CMOS chamber

The post miniCAM8C Deep Sky Combo appeared first on Modern Astronomy.

miniCAM8M Deep Sky Combo

Bernard Karpinski — Tue, 07 Jan 2025 21:18:59 +0000

Sample Images using the miniCAM8M Deepsky Combo

A Colour version is now available – QHY miniCAM8C Deep Sky Combo

VdB 62 Nebula

By Abdullah Al-Harbi

Camera: QHY miniCAM8M Deepsky Combo

Telescope: Askar 600 ‎‏

Mount: HAE EC 69 ‎‏

Exposure: L 300*40, R 300*48, G 300*36, B 300*35, Ha 300*43

Total integration: 16.8 hours

Bortal class 5/6

The Rosette Nebula

By Luca Bartek

Camera: QHYCCD miniCAM8M Deepsky Combo

Telescope: Askar FRA600

Exposure:
QHYCCD H-alpha 7nm: 38×600″(6h 20′)
QHYCCD OIII 7nm: 21×600″(3h 30′)
QHYCCD SII 7nm: 44×600″(7h 20′)

Integration: 17h 10′

Overview

Features

High Near-Infrared Sensitivity

*This data is officially provided by Sony: https://www.sony-semicon.com/cn/news/2021/2021062901.html

BSI

Zero Amplify Glow

miniCAM8 is also a zero amplifer glow camera.

Anti-Dew Technology

Cooling

In addition to dual-stage TE cooling, QHYCCD implements proprietary technology in hardware to control the dark current noise.

Linearity HDR Mode

In the “Linearity HDR” mode, the full well is 46 ke-, while the read noise is only 1.0e-; the dynamic range reaches up to 46,300:1, equivalent to 93 dB or 15.5 stops.

Filters Introduction

Specification

Model	miniCAM8
CMOS Sensor	Sony IMX585
Mono/Color	Both Available
BSI/FSI	BSI
Sensor Size	1/1.2inch
Pixel Size	2.9μm*2.9μm
Total Pixel Area	3856*2180
Effective Pixels	8 MP
Full Well Capacity	54ke- Linearity HDR Mode: 46ke-
Readout Noise	0.76 – 7.8 e- Linearity HDR Mode: 1.0e-
Peak QE	M: 92% C: R: 82%; G: 87%; B: 75%
Dynamic Range	Linearity HDR mode: The dynamic range reaches up to 46,300:1, equivalent to 93 dB or 15.5 stops.
A/D	Dual 12-bit (output as 16-bit)
Full Frame Rates	Full Resolution: 41.5FPS@8bit，23.5FPS @16bit
ROI Frame Rates	Full Resolution 1080Lines, 82FPS@8bit, 47FPS@16bit；640Lines, 177FPS@8bit, 105FPS@16bit
Exposure Time Range	11μs-900sec
Shutter Type	Electronic Rolling Shutter
Built-in Image Buffer	512MB DDR3
Computer Interface	USB3.0
Telescope Interface	1.25，2 inch
Optic Window Type	AR+AR
Filter Wheel	Built-in 8-Position Carousel
Back Focal Length	17.5mm
Cooling System	Dual Stage TEC cooler: Long exposures (> 1 second) typically -45℃ below ambient
Weight	480g

Curves

The peak quantum efficiency of the miniCAM8M reaches 91.2% in the OIII band, 80.9% in the Ha band, 78.7% in the SII band, and 40.1% in the methane band.

The peak quantum efficiency of the miniCAM8C: R channel: 82%; G channel: 87%; B channel: 75%.

Mechanical Dimensions

Accessories

(LPF: Light Pollution Filter; HLP: Heavy Light Pollution Filter; FCE: Four-Channel Enhancement Filter)

User’s Review

User Guide: miniCAM8 Filter Wheel Installation

You can also refer to the review video in the link for the filter installation process: https://youtu.be/N-sjPw5zgsM?si=5dNP4vI1J-FokBxI

User Guide: miniCAM8 Filter Wheel Driver Installation

User Guide: HDR Correction of miniCAM8/QHY5III585

FPGA version: 24-12-6 and its later version

SDK version: 24-12-26-12 and its later version

All-in-one version: 24.12.27.10 and its later version

HDR_correction will be on by default. (It is for 16-bit single frames and live, and not available for 8-bit.)

SharpCap version: 4.1.12311 and its later version

HDR Custom Control in SharpCap: “HDR_correction,” “HDR_L_K,” “HDR_L_b,” and “HDR_showKB”

HDR_L_K: stretch value of the low channel

HDR_L_b: offset value of the low channel

The two values influence the image linearity together.

HDR_showKB: On: values will be shown on the top left of the image; Off: no values shown

User Guide: Start the Camera

Install “All-In-One” Driver&SDK Pack

Before Start: Input Voltage Requirements

Please note that the input voltage cannot be lower than 11.5v, otherwise the device will be unable to work normally.

Install “All-In-One” System Pack

All-in-one Pack supports most QHYCCD models only except PoleMaster and several discontinued CCD cameras.

Download Page: https://www.qhyccd.com/download/

Video Tutorial: https://www.youtube.com/embed/mZDxIK0GZRc?start=1

Since most of the contents of All-in-one package are plug-ins that support third-party software, the third-party capturing software that you want to use must be installed before the All-in-one package. Otherwise the program will report an error.
ALL-IN-ONE Pack contains:
- System Driver, which is necessary for the camera operation and must be installed.
- WDM Broadcast Driver, which can provide a live signal to Obs and other live software, you can install it if you have such needs like opeing a live show.
- EZCAP_QT , which is developed by QHYCCD and can be used in QHY devices tests, and management of updates. So even if you won’t use EZCAP_QT for capturing, we suggest you install it.
- Ascom driver, which is necessary for the camera used in Ascom (the latest version of Ascom is 6.6).
- The two sorts of Ascom CFW Drivers correspond to two methods of controling the filter wheel: USB control and camera serial control. It is recommended that both drivers should be installed if you have a filter wheel.
- CP210X_VCP is a serial driver. Some computers come with the driver, but the computer without the driver may be failed of controling the filter wheel.
- SDKs for Third-party Software: Just pick and install the corresponding SDK according to the software you want to use. Don’t forget to check whether the software you are using is 32-bit or 64-bit and select the right SDKs.
- SHARPCAP is also included in the pack, you can choose 32-bit or 64-bit to install. This is authorized by SHARPCAP.
- QT LIB is a plug-in to ensure that 64-bit software can exeuate normally on some computers with poor compatibility.
Difference between Stable version and Beta Version: Beta version is the latest version, which gives priority to support for the latest products (the stable version may not be compatible with those yet), and has some of the latest optimized ,but experimental features. The stable version is older than the beta version but more stable, so it is recommended for beginners who are not using the latest products.
Don’t let the camera connect to the computer during the All-in-one pack installation process; connect it to the computer after all the installation is complete.

Connect DSO Imaging Software (e.g. NINA)

In NINA, you can select the device to connect to QHY Camera directly without ASCOM driver.

Connect Planetary Imaging Software (e.g. SharpCap)

If you have already started the SharpCap software before connecting the camera, in order to open the camera, click on the “camera” in the menu bar and then select the device.

If you want to enter the 16-bit image mode, select the “RAW16” mode.

By selecting the “LX” mode you can expand the exposure setting range and take long exposures.

User Guide: Camera Maintenance

Drying the camera CMOS chamber

The post miniCAM8M Deep Sky Combo appeared first on Modern Astronomy.

ZWO ASI294MC Pro Colour

Bernard Karpinski — Fri, 01 Apr 2022 12:46:54 +0000

ZWO ASI294MC PRO COOLED Colour Camera

The first camera in the world with SONY’s latest 4/3″ sensor, the IMX294CJK.

Similar to the ZWO ASI1600MC Pro colour camera, the ZWO ASI294MC Pro Colour is an excellent choice for imaging deep sky objects, but it can do much more than that. With a max framerate of 19 FPS at 10 bit ADC and 16 FPS at 14 bit ADC this camera can also be used as an extremely high resolution planetary imager. If you cannot decide between deep sky or planetary imaging, go for this camera. It is also a much more affordable alternative to converting a DSLR.

You can even use it for guiding, although though this is somewhat overkill, there might be occassions when this is useful.

This product listing is for the COOLED version of the ZWO ASI294MC Pro Colour. This cooled version is part of the PRO series of cooled ZWO cameras that features a DDR memory buffer.

With the ZWO ASI294MC Pro Colour you won’t have to spend lots of time to get beautiful images, however, if you want to get the best results from this range of cameras and you have plenty of time to spare, why not to try L-RGB or narrow band photography with the monochrome version of the similar ZWO ASI1600MM or ZWO ASI1600MM-COOL. (If you go for the monochrome version, you’ll also need a filter wheel and a set of L-RGB filters, plus H-alpha, OIII and SII filters, and maybe even H-beta filter as well for narrow band photography…)

Please note that the sensor diagonal size is very close to the internal clear aperture of a 1.25″ filter, therefore with extremely fast telescopes (small f-ratio) there might be vignetting. The limiting f-ratio will depend on the telescope and whether you will use any filters with this camera. Although it’s a colour camera, good results can be achieved by using filters against light pollution and even H-alpha or other narrowband filters in certain setups.

Here is a link to an interesting article that might help many users to use and calibrate the camera correctly. One of the important notions is that short exposures below 3-4 seconds to be avoided due to non-linear response of the camera… (this relates to flats and flat-darks as well), but please read the article here:

ASI294MC Calibration – Testing, Notes, Thoughts, and Opinions – Experienced Deep Sky Imaging – Cloudy Nights

Features of the NEW ZWO ASI294MC-PRO

Recommended for Deep Sky Imaging as well as the Sun, Moon and planets at very high resolution (although monochrome ASI174 would be better for the Sun)
(To image the Sun you’ll have to use a proper front solar filter or Herschel wedge depending on your telescope. Please contact us if not sure!)

High-Sensitivity Type 4/3 CMOS Image Sensor that Supports 4K for Astro Cameras and Industrial Applications

The “IMX294CJK” is the first in-house image sensor for astronomic cameras to adopt the Type 4/3 format, and realizes output of the number of pixels needed for 4K at 120 frame/s (in ADC 10-bit output mode, ASI294MC can run up to 25fps at 4k format base on USB3.0 bandwidth). In addition, use of a large-size pixel achieves SNR1s of 0.14 lx* which is very close to the value of ASI224(0.13 lx*).

Exceptional low-illumination performance

Exceptional low-illumination performance of SNR1s: 0.14 lx is realized by use of a large-size optical system and by expanding the area per pixel to 4.63 µm. This makes the IMX294CJK ideal sensor for astronomic camera market applications which requires low-illumination performance.

DDR Memory Buffer

The ASI294MC Pro colour camera includes a 256MB DDR3 memory buffer to help improve data transfer reliability. Additionally, the use of a memory buffer minimizes amp-glow, which is caused by the slow transfer speeds when the camera is used with a USB 2.0 port.

14bit ADC & 13 stops Dynamic Range

ASI294 have 14bit ADC and it can achieve 13 stops dynamic range which is even better than ASI1600.

HCG Mode

HCG mode will be on when gain is higher than 120 (12db), read noise will drop below 2e but same dynamic range (13 stops).

Full well Capacity

63700e full well capacity, which is 3 times more than the ASI1600’s capacity. Even bright stars won’t saturate under long exposure.

This camera can achieve higher SNR (signal to noise ratio) with just one single exposure.

Reliable Mechanics

ASI294MC Pro has same mechanics as ASI1600 Pro. There are four screws that seal the sensor chamber. Our camera design has been extensively tested and is very stable.

Even when used in higher humidity environments, ASI294MC Pro will still works fine without dew problems.

High QE

The IMX294 sensor is a BSI (backside illuminated type) sensor, which has very high QE (quantum efficiency, which we estimate is over 75% peak).

Dark Current

The dark current of the ASI294 is slightly higher than the ASI1600, based on our test results.

Dark frame sample @ Highest dynamic range settings, 300s, -10degree, bin1.

Click here to download a sample ASI294MC Pro Dark Frame

USB 3.0 Port & USB2.0 HUB

USB 3.0 Port: Provide 5Gb bandwidth to make it possible for ASI294 Pro to run at 16 fps (14bit, normal mode) or 19 fps (10bit, high speed mode) at full resolution(11.7Mega).

Recommended cooler power supply: 12V @ 3-5A (or more) DC adapter (2.1×5.5mm, center pole positive). Also suitable: DC battery with 9-15V.

Using a battery with 9-15V is also suitable for the cooler power supply.

USB 2.0 HUB: can connect with various accessories, such as filter wheel, guide camera and electronic focuser, so you can better manage your cables. The ASI294 Pro includes two short 0.5m USB 2.0 cables. The integrated USB 2.0 hub is powered by the external power source if you connect one.

Cooling System

The ZWO ASI294MC PRO colour has a two-stage TEC cooling system that allows deep cooling to 35°C-40°C below ambient. You will need an external power supply to power the cooler. As users might want to power it in various ways (i.e. from a power tank, a Primaluce Lab Eagle 2 or mains, an AC-DC power adapter is not included in this package.

If you are having any trouble with the cooling, please check out the following page on the manufacturer’s website before contacting us:

Click here: Why the cooler does not work?

ASI294 VS ASI1600

The following table provides a comparison of the differences between the ASI294 and ASI1600. One cannot say which one is better as there are pros and contras for both; they are simply different. It would depend on the application, optical system used and the imaged object which camera would have to be favored.

FEATURES

Resolution: 11.7MPixel 4144 x 2822
Pixel Size: 4.63µm
Exposure range: 32µs – 2000s!
Read Noise: 1.2e – 7.3e
Full Well: 63700e
ADC: 14 bit
Cooling: 40 – 45 degrees below ambient (obviously, only on the cooled version)
Standard Autoguider Port
Peak Quantum Efficiency: TBC
Full aluminum housing with standard 2″ interface
M42X0.75 internal thread (T-thread)
Back Focus: 6.5mm (from camera front)
Back Focus: 17.5mm (from front of 11mm reverse thread adapter)

CONNECTIONS

1. M43-T2 adapter

2. EOS-T2 adapter

3. 2”Filter (optional)

4. 1.25” T-Mount

5. 1.25” Filter (optional)

6. M42-1.25” adapter (optional)

7. T2 extender 11mm

MECHANICAL DESIGN

WHAT’S IN THE BOX:

DOWNLOADS

On the included CD you’ll find drivers and two software applications: Firecapture and SharpCap. These are both freeware and the latest versions can be downloaded from the developers’ websites.
If you have any problem with installing any of the software from the CD, please download them from here:
Firecapture Beta Downloads
SharpCap Downloads
We’d recommend to always use the beta version of Firecapture, but reverse to the latest stable version if you experience problems.

ALL SKY CAMERA

due to the large sensor size, the usual 150 degree wide lens IS NOT included as it is not compatible, but there might be some other compatible lenses that would work with this camera. If you know about such lens, please let us know, so that we can share it with other users as well.

Specifications of the ZWO ASI294MC Colour Camera

Camera technical details

Sensor: 4/3″ SONY IMX294 CMOS
Diagonal: 23.2mm
Resolution: 11.3Mega Pixels 4144 x 2822
Pixel Size: 4.63µm
Bayer Pattern: RGGB
Exposure Range: 32µs-2000s
ROI: Supported
ST4 Guider Port: Yes
Focus Distance to Sensor: 12.5mm
Shutter Type: Rolling Shutter
Protect window: AR coated window
Operating System Compatibility: Mac, Windows, Linux
Interface: USB3.0/USB2.0
Bit rate: 12bit output(12bit ADC)
Adaptor: 2″ / 1.25″ / M42X0.75
Dimension: φ62mm X 36mm
Weight: 120g or 4.2 ounces (without lens)
Working Temperature: -5°C—45°C
Storage Temperature: -20°C—60°C
Working Relative Humidity: 20%—80%
Storage Relative Humidity: 20%—95%
Max FPS at full resolution:
10Bit ADC
4144×2822 19fps
14bit ADC
4144×2822 16fps
More resolutions can be user defined

For full specification, driver installation tutorial (youtube video), basic usage information and recommended third party software please visit the manufacturer’s website: ZWOptical

There is also a Yahoo Group where you can find lots of information about how other members use the ZWO cameras: Yahoo Group ZWO ASI Cameras

The post ZWO ASI294MC Pro Colour appeared first on Modern Astronomy.

QHY268M Mono CMOS Camera

Bernard Karpinski — Mon, 11 Jan 2021 23:09:09 +0000

QHY268M Mono CMOS Camera is a cooled, back-illuminated, CMOS camera based on the Sony IMX571 sensor with native 16-bit A/D and 3.76um pixels. This is the Mono version of the popular QHY268C colour camera.

The QHY268M Mono CMOS Camera has a newly designed front end giving a BFL of only 12.5mm.

The QHYCFW3-M-US and QHYOAG-M are compatible and it’s easier to use 1.25″ format guide cameras like the QHY5L-II Mono

More info at the QHY website and below:

QHY268M MEDIUM FORMAT SCIENTIFIC CMOS CAMERA SPECIFICATIONS
Model	QHY268M
Image Sensor	SONY APS-C CMOS Sensor IMX571
Sensor Type	Back Illuminated (BSI)
Pixel Size	3.76um x 3.76um
Sensor Surface Glass	Multi Layer AR coating
Effective Pixels	26 Megapixels
Effective Image Area	6280*4210 (includes the optically black area and overscan area)
Full Well Capacity	51ke- (> 75ke- in extended full well mode)
A/D	Native 16-bit (0-65535 greyscale) A/D
Sensor Size	APS-C format
Full Frame Rate	USB3.0 Port: Full Resolution 6.8FPS @8BIT 6FPS @16BIT 2048lines 13.6FPS @8BIT 11.5FPS@16BIT 1080lines 25.4FPS @8BIT 19.5FPS@16BIT 768lines 35FPS @8BIT 25FPS@16BIT 480lines 50FPS @8BIT 34FPS@16BIT
Read Noise	1.1e- High Gain, 3.5e- Low Gain (5.3e- to 7.4e- in extended full well mode)
Dark Current	0.0005e/pixel/sec @ -20C 0.001e/pixel/sec @ -10C
Zero Amplifier Glow	Yes
Exposure Time Range	30us – 3600sec
Firmware/FPGA upgrade	Fully Supported via Camera USB port
Non-volatile memory / On camera storage	Build-in total 64MByte Flash Memory. 10MBytes user-accessible space for stellar ROI frames for analysis for exoplanet investigation, occultations, atmospheric seeing measurements, focus, optical analysis, etc. Supports 100100 image x 500 frames; 5050 image x 4000frames; 2525 image x 16000 frames; 1010 image x 250000 frames .
Shutter Type	Electronic Shutter
Computer Interface	USB 3.0
Built-in Image Buffer	1GByte/2GByte DDR3 Memory
Cooling System	Dual Stage TEC cooler（-35C below ambient）
Anti-Dew Heater	Yes
Telescope Interface	M54 or M48 with provided adapters and spacers
Optic Window Type	AR+AR High Quality Multi-Layer Coatings
Back Focal Length	12.5mm（±0.3）

The post QHY268M Mono CMOS Camera appeared first on Modern Astronomy.

QHY294M Pro Mono CMOS Camera

Bernard Karpinski — Mon, 26 Oct 2020 10:15:50 +0000

The QHY294M Pro Mono CMOS Camera is a revolutionary upgrade for Micro 4/3 sensor cameras.

QHY294M Pro Mono CMOS Camera features the Sony IMX492 chipset which has 46.8 million 2.315um pixels. Sony 2×2 bins on-chip to create the sensor’s advertised 11.7 million 4.63um pixel array. The QHY294 Pro mono CMOS camera is capable of flipping the on-chip binning on and off to provide two readout modes. The first mode reads the sensor’s “locked” mode to produce 11.6mp images with 4.63um pixel size and 14 bits per pixel. The second read mode unlocks the binning to produce 46.8mp images with 2.315um pixel size at 12 bits per pixel. Note this binning is like traditional CCD binning, it is not software binning and thus allows different pixel scales.

This ability to unlock the higher resolution option allows far better image scale to be achieved when using the camera with smaller telescopes of around 500mm focal length under typical seeing. In normal mode the pixel scale is well matched to telescopes of approx. 1000-1200mm.

The sensor is a BSI (Backside Illuminated) type which offers far lower read noise and higher QE than earlier types. Overall, together with the pixel scale benefits, the new 294M Pro offers the possibility of better results combined with the lower overall cost of a Micro 4/3 sensor. When combined with a QHY filter wheel, 31mm filters are fully illuminated at focal ratios of as low as F3.25!

Model QHY294M Pro (Monochrome)

Sensor IMX492 4/3inch sensor

AR Coating On Sensor Yes

Pixel Size 4.63µm x 4.63µm (Unlocked 2.314µm x 2.314µm)

Effective Pixel Area 4164 x 2796 pixels (Unlocked 8340 x 5644)

Effective Pixels 11.6 mega pixel (Unlocked 47 mega pixel)

Effective Image Area 17.7mm x 13.4mm

Fullwell 65ke-

AD Sample Depth 14bit (output as 16bit and 8bit) in 11.6MP Mode / 12bit (output as 16bit and 8bit) in 47MP Unlock Mode

Full Frame Rate and ROI Frame Rate (11.6MP Mode)

4164*2796 16.5FPS@14BIT

2160lines(eg.4164*2160,4096*2160) 21FPS
1080lines(eg.4164*2160,1920*2160) 41FPS

960lines(eg.4164*960,1280*960) 46FPS

768lines(eg.4164*768,1024*768) 56FPS

480lines(eg.4164*480,640*480) 87FPS

240lines(eg.4164*240,320*240) 156FPS

100lines(eg.4164*100,240*100) 290FPS

Full Frame Rate and ROI Frame Rate (47MP Mode)

8340*5644 4FPS@14BIT and 8BIT

*Note: QHYCCD has optimized the CMOS drive frequency and limited the maximum frame rate to ensure the better noise performance. If you need a custom higher frame rate version please contact us.

Readout Noise 1.6e-1.2e@HGC mode 6.9-5.2e@LGC mode

Dark Current 0.002e/pixel/s@-20C / 0.005e/pixel/s@-10C
Exposure Time Range 60µs-3600sec

Anti-Glow Control Yes

Shutter Type Electric Rolling Shutter

Computer Interface USB3.0

Built-in Image Buffer 128MByte DDR3 Non-volatile memory

Cooling System Dual Stage TEC cooler（approx -35C° below ambient)

Anti-Dew Heater Yes Air-proof Chamber with silicon gel tube socket

Telescope Interface M42/0.75 (T2)

Optical Window Type AR+AR High Quality Multi-Layer Anti-Reflection Coating

Back Focal Length 17mm (+/- 0.5mm)

Weight 650g

Other Ports 4PIN QHYCFW Port.

Power Supply 12V DC input (Required for TEC use)

The post QHY294M Pro Mono CMOS Camera appeared first on Modern Astronomy.

QHY268C Photo

Bernard Karpinski — Wed, 01 Jul 2020 15:49:53 +0000

The QHY268C Photo is a 26mpx APS-C cooled back-illuminated, colour CMOS camera based on the Sony IMX571 sensor with native 16-bit A/D and 3.76um pixels.

The Sony IMX571 sensor has on-chip 16-bit A/D for highest resolution of greyscale. The output is real 16-bits with 65536 levels. Compared to 12-bit and 14-bit A/D, 16-bits provides higher sampling resolution. At high gain, the camera yields close to 1e-/ADU with no sample error and low read noise.

High Dynamic Range, 75ke full well Vivid colours

Great full well brings vivid colours. One benefit of the back-illuminated CMOS structure is improved full well capacity. This is particularly helpful for sensors with small pixels. Even with unbinned, the 3.76um pixels of the QHY268C Photo has a superb full well capacity of 75ke-

Watch a Review on YouTube

New! The QHY268M (mono version) is now available!

The post QHY268C Photo appeared first on Modern Astronomy.

QHY600 Mono Full Frame Cooled CMOS Camera

Bernard Karpinski — Fri, 19 Jun 2020 22:31:57 +0000

The QHY600 Mono Full Frame Cooled CMOS Camera uses the latest SONY IMX455 back-illuminated sensor, a full frame (35mm format) sensor with 3.76um pixels and native 16-bit A/D. This sensor is available in both monochrome and color versions. The sensor size is 36mm x 24mm. With the round body design, the QHY600 is an ideal camera to match the image circle of the new generation of RASA telescopes.

The new Sony sensor used in the QHY600 has native 16-bit A/D on-chip. The output is real 16 bit with 65536 levels. Compared to 12-bit and 14-bit A/D, a 16-bit A/D yields higher sample resolution and the system gain will be less than 1e-/ADU with no sample error noise and very low read noise. This leads to the possibility of images with superb dynamic range.

One benefit of the back-illuminated CMOS structure is improved full well capacity. This is particularly helpful for sensors with small pixels. Even unbinned, the QHY600 has a full well capacity of more than 51ke-. When binned 2×2 to 7.5um the full well is 196ke- and when binned 3×3 to 11um the full well is 441ke-

The QHY600 has only one electron of read noise at high gain / full resolution and a 4FPS readout speed. One electron of read noise means the camera can achieve a SNR>3dB at only 4 to 6 photons. This is perfect performance when conditions are photon limited, i.e., short exposures, narrow band imaging, etc. This makes the sensor ideal for sky surveys, time domain astronomy, fluorescence imaging, DNA sequencing and microscopy.

In order to provide smooth uninterrupted data transfer of the entire 60MP sensor at high speed, the QHY600 has 2GB DDR3 image buffer. In addition the camera features a USB3.0 interface for transmission of data at high speed.

Specifications

Model QHY600 PH (QHY600U3G20M) Mono

Image Sensor SONY Full Frame BSI CMOS Sensor IMX455

Pixel Size 3.76µm x 3.76µm Mono

Sensor Surface Glass AR+AR Multi-Coated

Sensor Type Back-Illuminated (BSI)

Effective Pixels 61.17 Megapixels 9576 x 6388 effective area (9600 x 6422 with overscan and optically black area)

Effective Image Area 36mm x 24mm

Full Well Capacity (1×1, 2×2, 3×3) Standard Mode >51ke- / >204ke- / >408ke- Extend Full Well Mode >80ke- / >320ke- / >720ke-

A/D 16-bit (0-65535 levels) at 1×1 binning 18-bit at 2×2, 19-bit at 3×3, 20-bit at 4×4 software binning *QHY600 uses software digital binning for 2x2binning. With digital sum, 2x2binning will be four 16-bit summed then it is 18-bit.

Sensor Size Full Frame Format (36mm x 24mm)

Image Transfer Speed

Full Frame Size: 4.0FPS (8-bit output)

Full Frame Size: 2.5FPS (16-bit output)

7.2FPS at 9600 x 3194

22.5FPS at 9600 x 1080

28FPS at 9600 x 768

47FPS at 9600 x 480

160FPS at 9600 x 100,

Read Noise 1.0e- to 3.7e- (Standard Mode)

Dark Current 0.0032e-/p/s @ -20C 0.0056e-/p/s @ -10C

Exposure Time Range 40µs – 3600sec

Firmware/FPGA remote Upgrade Supported. Via Camera USB Port

Shutter Type Electric Rolling Shutter

Computer Interface USB3.0

Built-in Image Buffer 1GBytes（8Gbit）/ 2GBytes（16Gbit）DDR3 memory Non-volatile memory / On camera storage Build-in total 64MByte Flash Memory. 10MBytes user-accessible space for stellar ROI frames for analysis of exoplanet investigation, occultations, atmospheric seeing measurement, focus, optical analysis, etc. Supports 100*100 image x 500 frames, 50*50 image x 4000 frames, 25*25 image x16000 frames, 10*10 image x 250000 frames

Cooling System Dual Stage TEC cooler: – Long exposures (> 1 second) typically -35C° below ambient – Short exposure (< 1second) high FPS, typically -30C° below ambient

Water Cooling Version Available optionally. QHYCCD can offer this version. Contact us for more details

Anti-Dew Heater Yes

Telescope Interface M54/0.75

Optic Window Type AR+AR High Quality Multi-Layer Anti-Reflection Coating

Power 40W/100% 20W/50% 13.8W/0%

Back Focal Length 12.5mm (±0.2mm).

Weight (net) Photographic Version: 837g (not including the M54/0.75mm center/tilt adjust ring)

NB. This listing is for the latest short back focus version.

The post QHY600 Mono Full Frame Cooled CMOS Camera appeared first on Modern Astronomy.

QHY247C APS-C Camera

Bernard Karpinski — Tue, 17 Sep 2019 12:34:25 +0000

Ultra High Performance
QHY247C APS-C Camera has a APC-S 24mega pixels, 14bit CMOS sensor IMX193. This sensor is also used in the D5300 and D5500 camera. It has 2.7e low readout noise at lowest gain and 2.2e low readout noise at unity gain(system gain = 1e/adu), and 1.0e at high gain. QHY247C is camera with lowest readout noise and thermal noise in the QHY165C/168C/247C/367C production line.

True RAW Image Output
QHY247C APS-C Camera has the same CMOS sensor like D5300/D5500.But D5300 only offer 13bit and both D5300 and D5500 is not really RAW output even it is “RAW” format. You will find the de-noise sign on the raw images from the hot pixel styles in the DSLR dark frames. While the QHY247C offers the TRUE RAW IMAGE OUTPUT and it gives original signal and keep the max flexibility of astronomy image process.

Unique Thermal Noise Reduction Technology
Besides the 2-stage TEC, QHYCCD has an unique thermal noise control technology to get the cmos sensor very low thermal noise and make whole 165/168/247/367 product line has much better thermal noise performance than competitors.

128MB DDRII Image Buffer
QHY247C has 128MB DDRII image buffer to help the image cache to avoid the risk of frame lost. The data will store in the DDR for first then transfer to computer. It will avoid the USB port too busy when there is more USB3.0 camera connected.

Anti-Dew Technology
With the long time experience on the cooled CCD camera design. QHYCCD has the fully anti-dew technology for both CCD sensor surface glass and the optic window glass. QHY247C has the electric heating board for the CCD glass windows to prevent the window get dew and the silicon gel tube socket design for control the humidity within CMOS chamber.

AR+AR optic window
In order to avoid the halo around the bright star. The QHY247C has a AR+AR coating optic window rather than the common IR cut window for OSC color cameras. So you need to use your own IR cut filter (most L filter can do that) on front of the camera. You can install the 2inch filter on the M48 thread of the 2inch T ring. Or QHYCCD supplies an optional 2inch filter holder for QHY247C to allow you put this filter when connecting with a flat field

The post QHY247C APS-C Camera appeared first on Modern Astronomy.

QHY183M

Bernard Karpinski — Fri, 02 Feb 2018 10:35:05 +0000

The QHY183M is a one-inch, 20 Megapixel back-illuminated COLDMOS camera. Pixel size is 2.4um for high-resolution. The camera is capable of producing 15FPS @ 20 Megapixels. It has a two-stage TEC that cools the sensor to -40C to -45C below ambient. ADC is 10/12-bit and 8/12-bit output with 1e- read noise! Computer interface is USB 3.0 and exposure times can be set from 50us to 3600 sec.

128MB DDR Buffer

The QHY183M has a built-in 128MB DDRII image buffer. The benefit of the image buffer is that the memory will cache the image and transfer it to the computer when the USB interface is not busy or being interrupted, and the frame will not be lost or corrupted. This buffer also allows a slower computer with USB 2.0 socket to capture every frame without loss even if the USB socket is occasionally busy with other peripherals. This buffer also helps multiple camera applications and avoids USB transfer problems. For example, it is possible to operate four QHY183M cameras on the same computer to create an LRGB imaging array.

Full Anti-Dew Solution

With more than a decade of experience designing cooled cameras, QHYCCD has applied this knowledge to the QHY183M camera. The full anti-dew technology includes a sealed CMOS chamber with silicon gel tube socket and a heated chamber optical window. This technology prevents dew from forming on the sensor itself, or on the chamber window, even in a high humidity environment.

Sony’s Image Sensor Exmor R is a back-illuminated CMOS image sensor with improved sensitivity and noise reduction – the key factors to enhancing image quality, while radically realigning their fundamental pixel structure from front-illumination to back-illumination. It retains the advantages of CMOS image sensors such as low power consumption and high-speed operation while dramatically improving sensitivity. With a conventional front-illumination structure, the metal wiring and transistors on the surface of the silicon substrate that form the sensor’s light-sensitive area (photo-diode) impede photon gathering carried out by the on-chip lens, and this has also been an important issue in the miniaturization of pixels and widening optical angle response.

A back-illuminated structure minimizes the degradation of sensitivity to optical angle response, while also increasing the amount of light that enters each pixel due to the lack of obstacles such as metal wiring and transistors that have been moved to the reverse of the silicon substrate. However, compared to conventional front-illuminated structures, back-illuminated structures have historically caused problems such as noise, dark current, defective pixels and color mixture that lead to image degradation and also cause a decrease in the signal-to-noise ratio To overcome this Sony newly developed a unique photo-diode structure and on-chip lens optimized for back-illuminated structures that achieves a higher sensitivity and a lower random noise without light by reducing noise, dark current and defect pixels compared to the conventional front-illuminated structure. Additionally, Sony’s advanced technologies such as high-precision alignment have addressed any color mixture problems.

The post QHY183M appeared first on Modern Astronomy.