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Started by dan janosick, 06/09/2006 09:45AM
Posted 06/09/2006 09:45AM Opening Post
I own a vixen r200ss reflector, this is a 800 mm focal length scope with an f ratio of 4. I have had great widefield views, and success with a canon dslr. However, I cannot reach focus with my st-2000xm. It seems there is not sufficient back focus, meaning I cannot rack the drawtube in close enough. I do not want to change the focuser and do not know if this would completely resolve the problem, plus I do not want to change the coma corrector from stock. The only resolution from what I can see is cutting the OTA to force the light cone out of the drawtube. What are the draw backs of doing this? I wam wondering if you could advise me

daniel janosick
Posted 06/09/2006 10:32AM #1
How far are you from reaching focus? wouldn't moving the mirror forward be an easier solution?

Ivan Gastaldo 8)
Coconut Creek, FL

Ivan's Observatory
Lat 26N 16' 48" Long 80W 10' 48"
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