Quote:
Originally Posted by Camelopardalis
This is all good stuff chaps, keep it rolling 
Same for my Edge 8...I recently took some shots from Bretti and kicked myself when I saw them on the computer because I'd left the extension tube on by accident which meant my optical path was about 30mm too long for my Edge 8 + reducer, so there's ugly coma outside of the centre circle  For this scope, Celestron specify 105mm +/- 0.5mm - how practical is that!?!? |
Dunk, according to Celestron, a C8 with f6.3 has backfocus of 3 inches (75mm)
http://www.celestron.com/c3/support3...articleid=2210
I am only raising this as I am attempting to put my QHY8 on my C8 with a f6.3 FR. The distance from top of the camera body to the chip is 7 mm, so I need to have 68 mm clearance between the FR and the camera body (I hope I am correct in this
)
Bo