1.25 Inch Push Fit Adapter for SkyWatcher 9 x 50 Standard Finders Connects 1.25″ format cameras like the QHY5L-II, GPCam and Lodestar to SkyWatcher 9 x 50 straight through finders via 1.25″ push fit rather than screw fit – for convenience of setup. Also fits clones like some Celestron and Orion finders. Ask if unsure.

Please contact us prior to purchase if you are unsure

Tests have confirmed that guiding is successful at focal lengths of up to 1500mm and more. Stability is excellent if screws are tightened firmly and cables tied up.

Using the finder as a guide-scope reduces the weight and complexity of your imaging setup and the wide field of view guarantees finding suitable guide stars.

The post 1.25 Inch Push Fit Adapter for SkyWatcher 9 x 50 Standard Finders appeared first on Modern Astronomy.

Connects QHY5-II, QHY5L-II, GPCam and Lodestar cameras to Sky-Watcher, Orion and most Celestron (see below) 50mm straight through finders via 1.25″ push fit rather than screw fit – for convenience of setup.

Most Celestron finders are the same as Sky-Watcher, and have 11 fine threads cut into the rear of the finder tube. However some are different and we now have a separate adapter for those Celestron finders with 8 coarser (1mm) rear finder threads. Simply remove the eyepiece and holder to check.

[SPC900 / SPC800 to Sky-Watcher and GSO to C & T adapters are also available ]

Please contact us prior to purchase if you are unsure

Tests have confirmed that guiding is successful at focal lengths of up to 1500mm and more. Stability is excellent if screws are tightened firmly and cables tied up.

Using the finder as a guide-scope reduces the weight and complexity of your imaging setup and the wide field of view guarantees finding suitable guide stars.

The post QHY5 II and QHY5L II Push Fit Adapter for 50mm Straight Through Finders appeared first on Modern Astronomy.

Most Celestron finders are the same as Sky-Watcher, and have 11 fine threads cut into the rear of the finder tube.

However some are different and we now have a separate adapter for those Celestron finders with 8 coarser (1mm) rear finder threads. Simply remove the eyepiece and holder to check.

Please contact us prior to purchase if you are unsure

Tests have confirmed that guiding is successful at focal lengths of up to 1500mm and more.

Stability is excellent if screws are tightened firmly and cables tied up.

Using the finder as a guidescope reduces the weight and complexity of your imaging setup and the wide field of view guarantees finding suitable guide stars.

Adapters are near parfocal with visual focus of the finder.

The post SPC900 / SPC880 Adapter for Right Angled Finders appeared first on Modern Astronomy.

Most Celestron finders are the same as Sky-Watcher, and have 11 fine threads cut into the rear of the finder tube.

However some are different – Simply remove the eyepiece and holder to check.

Please contact us prior to purchase if you are unsure

Tests of the SPC900 and SPC880 Adapter for Straight Through Finders have confirmed that guiding is successful at focal lengths of up to 1500mm and more.

Stability is excellent if screws are tightened firmly and cables tied up.

Using the finder as a guidescope reduces the weight and complexity of your imaging setup and the wide field of view guarantees finding suitable guide stars.

Adapters are near parfocal with visual focus of the finder.

The post SPC900 and SPC880 Adapter for Straight Through Finders appeared first on Modern Astronomy.

Most Celestron finders are the same as SkyWatcher, and have 11 fine threads cut into the rear of the finder tube. However some are different and we now have a separate adapter for those Celestron finders with 8 coarser (1mm) rear finder threads. Simply remove the eyepiece and holder to check.

[SPC900 / SPC800 to Sky-Watcher and GSO to C & GSO to T adapters are also available ]

Please contact us prior to purchase if you are unsure

Tests have confirmed that guiding with the SkyWatcher 9×50 Finder to C Adapter is successful at focal lengths of 1500mm and more and is seeing dependent.

Stability is excellent if screws are tightened firmly and cables tied up.

Using a 9×50 finder as a guide-scope reduces the weight and complexity of your imaging setup and the wide field of view practically guarantees finding suitable guide stars.

Guiding software prefers a less than perfect star image, so the centre of the star mass can be better calculated. Most 9×50 finders are optimal for this “as-is” whereas small refractors can be, if anything, too sharp.

Please read this article “Thoughts on Auto-Guiding” for a more in depth analysis of the subject, which is borne out by my tests.

The post SkyWatcher 9×50 Finder to C Adapter appeared first on Modern Astronomy.

Other T thread guide cameras will be compatible if their sensors are around 10mm – 15mm below the front surface of the camera.

Please contact us prior to purchase if you are unsure

Tests have confirmed that guiding is successful at focal lengths of up to 1500mm and more. Stability is excellent if screws are tightened firmly and cables tied up.

Using the finder as a guide-scope reduces the weight and complexity of your imaging set up and the wide field of view guarantees finding suitable guide stars.

Adapters are near parfocal with visual focus of the finder.

The post Sky-Watcher & Clones to T thread Adapter for Right Angled Finders appeared first on Modern Astronomy.

Other T thread guide cameras will be compatible if their sensors are around 10mm – 15mm below the front surface of the camera.

Most Celestron finders are the same as Sky-Watcher, and have 11 fine threads cut into the rear of the finder tube.

However some are different and we now have a separate adapter for those Celestron finders with 8 coarser (1mm) rear finder threads. Simply remove the eyepiece and holder to check.

Please contact us prior to purchase if you are unsure

Tests have confirmed that guiding is successful at focal lengths of up to 1500mm and more if your optical system is rigid.

Stability is excellent if screws are tightened firmly and cables tied up.

Using the finder as a guide-scope reduces the weight and complexity of your imaging set up and the wide field of view guarantees finding suitable guide stars.

Adapters are near parfocal with visual focus of the finder

The post Sky-Watcher & Clones to T thread Adapter for Straight Through Finders appeared first on Modern Astronomy.

Most Celestron finders are the same as Sky-Watcher, and have 11 fine threads cut into the rear of the finder tube.
However some are different and we now have a separate adapter for those Celestron finders with 8 coarser (1mm) rear finder threads. Simply remove the eyepiece and holder to check.

[SPC900 / SPC800 to Sky-Watcher and GSO to C & T adapters are also available ]

Please contact us prior to purchase if you are unsure

Focus is achieved in the same way as using the finder visually, by screwing the objective in and out, then locking final position with the knurled locking ring. It’s best if focusing leaves star images slightly enlarged, as this gives auto guiding software a better chance of accurately determining the image centroid.

Our tests have confirmed online calculations that guiding is successful to the limits of what seeing allows. Because of the light weight, stability is excellent as long as screws are tightened properly and cables secured to prevent drag. I only recommend off axis guiding for scopes that are found to be prone to mirror movement or significant differential flexure over the course of your usual exposure. Even then many large SCT owners have been able to take 10 minute exposures or more without visible issues, so its always worth trying for the ease of use and low cost.

Using the finder as a guide-scope reduces the weight and complexity of your imaging setup, and the wide field of view guarantees finding suitably bright guide stars in every part of the sky.

The post Sky-Watcher & Clones to C Mount Adapter for Right Angled Finders appeared first on Modern Astronomy.