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Posted by rick oleson on October 11, 2000 at 08:16:36:
In Reply to: What F/Stop for B-Setting posted by Adam Price on October 10, 2000 at 18:33:11:
Choose your f/stop purely on the basis of depth of field - if you think it will come out too dark, just hold the button down longer, you're probably going to have to bracket a lot anyway.
i'm assuming subject motion isn't an issue...rick... this is me...
Editor's Note: Remember every reduction in aperture opening doubles the length of time the shutter needs to be open, i.e. when changing from f /2.8 to f/4, the calculated shutter speed will need to be doubled for proper exposure (perhaps more when you take reciprocity failure into consideration.) Reciprocity failure is a characteristic of film to slow down in speed with long exposures, usually those of more than 1 or 2 seconds duration. See film manufacturer for information on a specific film.
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