Quote:
Originally Posted by CoolhandJo
Ahhh - that explains it I think. The reflector, the coma corrector, the distance from the chip, the 1 1/4 inch nose piece is going to conspire against you with vignetting for sure.
I would strongly recommend a 2 inch adaptor + the coma corrector becuase you dont have to worry about a filter wheel as it is an OSC and so distance from chip should not be too much of an issue for you with regards to the correct spacing for the coma corrector.
I think that will make a huge differenc to your images with an even spread of light across the chip!
Looking forward to seeing them
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I didnt use the MPCC for this shot, its the 1.25" nosepiece only....Being an F5 means I have always got coma and pretty horrid vignetting on the DSLR APS sensor, I find this is quite manageable for now.
I might try the coma corrector again next time out, and even try the focal reducer to make my scope a 630mm FL, probable make the coma and vignetting worse, but its all a learning process to find the best combination for the new camera.
I even have my brother in law's Black Diamond ED80 on loan at the moment so I am definitely going to try this one out too as this seems to be perfectly suited to the ATIK 314L+ chip size
Stay tuned!
Cheers
Chris