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Takes 1.25″ OD format cameras and needs a Fastar compatible OTA.

Big brother to the Funstar for C8

Unlock the SPEED of your Celestron SCT telescope with the Funstar Adapter for Fastar Compatible 11″ Celestron SCTs. The FunStar is an adapter for Fastar compatible Celestron SCT telescopes that allows you to place the Revolution Imager in the secondary mirror position of your SCT telescope allowing you to use the telescope at an amazing focal ratio of f/2, this gives you the widest possible views and the lowest exposure times!

Installation is quick and easy, simply unscrew the secondary mirror from your Celestron SCT telescope, install the FunStar in its place, insert your Revolution Imager and you’re ready to experience those wide summer nebulas, large galaxy groups, huge open clusters and even the full disk of the moon!

The FunStar provides a standard 1.25″ opening and SCT threads for a huge variety of adapter combinations.  Also, the 11″ adapter is threaded on the inside for 2″ filters.

Please note: The FunStar does not provide any correction, so some aberrations will be present. However, the small chip-size in the Revolution Imager and similar small sensor makes these aberrations minimal.  NB please do not over tighten either the FunStar or your secondary when installing, just a little more than finger tight is enough!

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QHY Camera Tilter Plate Features

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The 2″ Extension Tube 80mm length is the longest of the available extension tube in 2″. Most adapters or eyepieces fit into it snugly. In some cases the barrel of the eyepiece or adaptor may be a little bit too long so that it extends a little bit beyond the extension tube. This does not cause any problems or any loss in mechanical stability.

The “optical length” includes only the length of the extension tube that acually extends out of the focuser. The length of the 2″ barrel of the extension tube is not included in this figure since the barrel normally disappears entirely into the focuser.

Eyepiece Clamp:

The eyepiece is clamped firmly but without scratches through a brass compression ring. The advantage is that eyepieces are held more securely and the risk of the eyepiece being tilted out of the optical axis is minimized.

Quality of Make:

These 2″ Extension Tube – 80mm are machined from solid aluminium. They are black anodized. The 2″ barrel has a safety undercut to prevent the extension tube from dropping out of the focuser accidentally. Of course the barrel also has a 2″ filter thread (M48x0.75) on the telescope side.

Extension Tubes from TS

Different telescopes can have very different back focus distances. In most telescopes the focal plane is deliberately moved further out, allowing users to attach cameras and other accessories more easily.

Refractors always have a rather long back focus since they are usually used with a star diagonal or erecting prism.

The Problem:

As a result of this you often cannot directly focus the telescope if you do not use it with the above accessory. You would have to move the focuser further out, but you reach the end of the focus travel before reaching a focused image.

The Solution:

TS extension tubes bridge the gap between the focuser and the focal plane. They are the ideal solution whenever focus lies further outside than you can normally reach with the focuser.

The post 2″ Extension Tube – 80mm appeared first on Modern Astronomy.

The 2″ Extension Tube 35mm length is the shortest of the available extension tubes in 2″. Most adapters or eyepieces just fit into it snugly. In some cases the barrel of the eyepiece or adaptor may even be a little bit too long so that it extends a little bit beyond the extension tube. This does not cause any problems or any loss in mechanical stability.

The “optical length” includes only the length of the extension tube that acually extends out of the focuser. The length of the 2″ barrel of the extension tube is not included in this figure since the barrel normally disappears entirely into the focuser.

Eyepiece Clamp:

The eyepiece is clamped firmly but without scratches through a brass compression ring. The advantage is that eyepieces are held more securely and the risk of the eyepiece being tilted out of the optical axis is minimized.

Quality of Make:

These extension tubes are machined from solid aluminium. They are black anodized. The 2″ barrel has a safety undercut to prevent the extension tube from dropping out of the focuser accidentally. Of course the barrel also has a 2″ filter thread (M48x0.75) on the telescope side.

Extension Tubes from GSO

Different telescopes can have very different back focus distances. In most telescopes the focal plane is deliberately moved further out, allowing users to attach cameras and other accessories more easily.

Refractors always have a rather long back focus since they are usually used with a star diagonal or erecting prism.

The Problem:

As a result of this you often cannot directly focus the telescope if you do not use it with the above accessory. You would have to move the focuser further out, but you reach the end of the focus travel before reaching a focused image.

The Solution:

Extension tubes bridge the gap between the focuser and the focal plane. They are the ideal solution whenever focus lies further outside than you can normally reach with the focuser.

The post 2″ Extension Tube – 35mm appeared first on Modern Astronomy.

The kit also includes a remote control that can be used to save images hands-free from the device and a video-splitter so you can use this at the same time as the 7″ monitor included with your Revolution Imager.

If you do plan on “stacking” images using AVI there is a very useful tool to clean up the video codec, found here: https://sites.google.com/site/astropipp/

And now experience the ultimate in portability by adding our hands-free DVR mounting solution here.

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