Celestron AS C8-SGT and Fastar Compatability
Posted 21 February 2004 - 02:50 PM
Research: The C8 OTA manual lists the CF OTAs as Fastar compatable and the aluminium OTAs as not compatable. I emailed Celestron Tech support and they said that the Nextstar GPS and CGE mounts are better because they have the worm drives (not exactly sure what they are). But, the C8-SGT talks about using the autoguider port to keep the mount aligned.
Can anyone confirm or deny this? Just wondering.
Posted 21 February 2004 - 05:45 PM
As to the mount stuff and autoguiders, yes again. The other mounts are more expensive and more accurate. I don't know the price difference between the Fastar and plain OTA's but I have a feeling that Celestron didn't want to put the Fastar on their cheaper mounts because then people would be disappointed with their performance. Just guessing. I don't agree with what I said. The cheaper mounts can work with Fastar, but it really takes a dedicated imager to work through the problems.
Posted 23 February 2004 - 04:01 PM
Does your OTA have an aluminum tube or carbon fiber tube? The manual for the OTA makes a distinction between the two. The 8" aluminum one is not Fastar compatable but the CF one is.
Also, did you get the XLT coatings?
Posted 23 February 2004 - 05:07 PM
I did have a Fastar C-8 (aluminum) a couple years ago, and had fun imaging with it.
Posted 24 February 2004 - 09:52 AM
The AS mount also uses a worm drive, so that comment from Celestron is a bit off base. The NexStar GPS and CGE mounts are higher quality though so they are probably better choices for photography. The C8 OTA is well within the capability of the AS mount. If you do want to do photography with the AS, the C8 would be your best choice.