Hi Mike,
Really enjoy John Gleason's images. He does some incredible Ha work. I could imagine the original FSQ focuser would be at maximum capacity with the PL16803. Tak have "beefed up" the focuser on the new FSQ-106ED to circumvent this. The FSQ with an 88mm image circle would have no problems in handling the 37mm x 37mm chip. In fact the FSQ will accomodate the largest CCD chip available today - The Fairchild CCD595. Its an 85Megapixel camera with a chip size of 80.6mm x 80.6mm -
http://www.fairchildimaging.com/prod...ea/ccd_595.htm
Does the PL16803 require square filters? Thats whats holding me back at the moment. As your chip gets larger, filters become extremely expensive (especially for narrowband work). I know Custom Scientific produce square filters, but they are double even triple the cost of a 50mm unmounted filter (which isn't cheap when you consider the CS 50mm unmounted 10nm Ha filters costs $A800).
Thanks for checking out the site - still work in progress.
I wish you some clear dark skies so you can get acquainted with your new setup.
