Hmm, no particular reason, lens creep or may be I moved the zoom whilst focusing I guess or something lost in translation between a Tamron/Canon fit lens on a Sony bodyCool shot.
Noticed this was at 500mm rather than 600mm. Any reason for that?
Given that the A7iii has two base ISO points, 100 and 640, I decided to shoot at 100 iso, 1/400 sec to reduce the effects of camera shake and brighten in postThe moon is bright when it fills a good part of your frame
1/80th
ISO125
F6.3 (widest it goes at 600mm)