Quote:
Originally Posted by Poita
Well, if I image at f2 with the hyperstar on a C9.25, which is around 650mm focal length, then I can capture an image 30x faster than a 650mm f10 scope.
So instead of needing a 9 minute exposure, I can get the same data in 18 seconds.
I'd call tha fast  |
Yes and no, the relationship changes somewhat due to 'reciprocity failure' with long exposure times but essentially that is correct.
CCD imaging is not my strong point so I don't know if there are differences in the relationship changes.