Quote:
Originally Posted by telemarker
Peter,
I noticed that you are using the Hotech FF with the ED127. Could you give us an appraisal of its performance at the edges of the QHY8. Is it a flat field?
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It's not bad. My separation is not quite 55mm (it's 54.2) but it's near enough I think. The edge coma I saw without the FF seems to have been corrected. Here are 3 images from Monday night. See what you think. all 3 are ED127/QHY8 and between 2 and 3 hours of 10min subs. The 4th image of NGC6559 was taken a few weeks before and without the FF.
Peter