Quote:
Originally Posted by RB
Jeremy I've used my 85mm f/1.2 for astro.
The thing I've found is that it's absolutely critical to get focus spot on else you get this happening.
I see it when using live view and it's very very difficult to get focus spot on.
Also focus can shift throughout the session as temps drop so you need to re-check it now and then.
I also stop it down a couple of stops.
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Wonderful Andrew. I'll try a mini Bhatinov mask. Stop it down ? Yes (second person to mention this) . Stopping down and using Phils' stacking idea might just do the trick.
Jeremy.