Hi All,
I've been imaging using a DSLR and an ED80 for a couple of months now. Have had great time learning, and constantly improving. I figured the next step would be a field flattener to improve corner sharpness, so I bought a William Optics P-Flat3 last week. First light last night was not as good as I'd hoped for, stars at the corners look like little crosses.
Check the attached crops, one is prime focus, the other is with the P-flat3. Is the P-Flat3 over-correcting the ED80? Should I try to exchange the P-Flat3 for a different product such as a MPCC or even a Paracorr? Has anyone seen this before and could give me some advice please?
Cheers,
Rob