Quote:
Originally Posted by browndog
Hi Daniel - I have recently changed my imaging setup - and this has significantly reduced any vignetting when using the focal reducer. The image of M16 below is full-sized and no cropping has been done. I found that the distance from the focal reducer to camera is important. If this distance is too long then vignetting is introduced.
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Thanks for the reply Ian. What distance are you using? I have seen literature which suggest the distance should be around 105mm, which is what I have set up for. I would imagine that as you reduce the distance, then the focal ratio would increase???
Cheers,
Daniel