Quote:
Originally Posted by graham.hobart
Hi! Greg, I tried it with a canon 6D unmodded first and got terrible concentric artifacts on the pics, same mount and guiding. They were unuseable. Plus I do get some light pollution here in the city. I will save the canon for darker skies one day.
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I don't know if the 6D has it but turn off auto lens corrections as auto vignette correction can do that. Well known artifact of the Sony A7 series in particular A7iii.
Concentric polygons in Sony's case.
Greg.