This is a re-post I had on begining astrophotography which may be better in this area as it may be just above a beginner topic perhaps.
I have a williams optics FLT110 f/6.5 APO with the WO 0.8 field flattener. This is collecting photons into a Canon 40d and does this job as well as can be expected. Now I seek broader field of view with same scope.
What sort of evil things will happen to the image if I try to use a Celestron f/6.3 focal reducer between the 40D and the field flattener?
I would expect the image gets warped to some extent but if I don't stitch mosaics is it not warped so badly as to still generate fair results for single frame sized shots?
Does the the reducer re-introduce gobs of chromatic garbage in the corners?
Do the corners become un-usable due to focus?
Does it 'just work' and I am over-analyzing this? (doubt this is the case).
Now if you don't think I am insane just yet, how about the same trick with a Meade f/3.3 focal reducer (it is ok to laugh, I can take it).
Thanks for any knowledgeable replies from anybody who has actually tried this OR knows the direct results of someone who has actually tried this. I know the image will suffer, just don't have a feel for how much yet.
Thanks,
Mark
