Hi group,
I have spent the last two nights trying to image with my new ST-
7XME. I am very disappointed in its highly touted performance. I
am using an NexStar11GPS with a f/6.3 focal reducer. I am using
three different camera control software programs; CCDOps, CCDSoft
and Nebulosity. All with the same results. I have LRGB and V
filters loaded in the filter wheel. As with all new cameras and
telescopes, I always try the easy objects first. After carefully
focusing the camera on a dim star with my FeatherTouch microfocuser,
I cannot get an image of the moon. I've tried the lowest possible
shutter speed of .001 second and all I get is black and white
streaks. Ok, so it's too bright and the camera is too sensitive so
I moved on to another object. I tried Saturn and all I can get is a
white blob with ears and that was at the zenith. Seems I can't get
the exposure down far enough. Is there a gain adjustment somewhere
in the software?
Tried to image M42; an easy object. Looking at the image, you would
think I was at f/10, but I have a .63 focal reducer on the rear
cell After the focal reducer comes a short T-adapter and then the
CWF9 and camera. I cannot physically get the camera any closure to
the C11 without removing the focal reducer. All I can get is the
trapezium. If I lengthen the exposure to 30 seconds, I begin seeing
the some of the nebulous filaments, but now the stars start blooming.
How do you folks take those pretty pictures that I see everyday? One
final note. I bought the camera primarily for differential
photometry, but for some reason, the FOV is less than 15'. Any
suggestions and advice would be appreciated. The ST-7 cost too much
money to give up, but I am about ready to go back to my Canon Rebel
XT.
Clear skies,
Bill
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