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Isn't it just degrees divided by minutes? That will give degrees per minute.
Then, divide the answer above by how many exposures per minute.
So, say you want to move 5 degrees in 10 minutes:
5/10=0.5 degrees per minute.
If your exposures were 30 seconds each (2 per minute):
0.5/2=0.25 degrees per exposure.
Is that what you were after, or, am I missing something?
H
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