Our local group went to our closer viewing spot and I got these two widefield shots the milkyway one seems to have stretched stars around the edges that I don't understand as I haven't had this happen with this lens before. Any ideas why
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The Milkyway one is at 800 iso and 15 sec 47 subs stacked in DSS and 30 darks.
The Crux one is 1600 at 15 sec and 35 subs in DSS with the same darks both with the same lens at 18mm