Quote:
Originally Posted by Inglewood Jack
...I've been able to keep it open for up to 20 seconds and stay sharp. ...
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Just to clarify, you can have star tails caused by moving Earth and still have a perfectly sharp photo. See below - this is likely several hours or even longer (not my photo). I have shot a starry sky at 30-second exposure and the resulting star tails were not nearly as long as in this photo. When you shoot the sky, you focus on infinity, so lack of sharpness does not come from poor focusing. The blur and lack of sharpness come primarily from lens/camera movement due to wind. And yes, very good reminders above to turn off your AF and VR/IS.
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Last edited by CaptainYooh; 07-16-2020 at 12:21 PM.
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