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Re: Medium Format Photography

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Posted by Dianne/">Dianne on June 22, 1999 12:26:26 UTC

: Does anyone do medium format astrophotography?

The "problem" with photographic formats is that for each increase in negative size, the exposure time goes up proportional to the increase in the AREA of the negative. In cameras, appeture becomes very important in medium and large format cameras to keep the exposure times reasonable.

When coupled to a telescope where the available light for exposure is limited, exposure times would become excessive. As "shutter open" time becomes very long, more "greying" of the negative is likely from very faint light sources/leaks and other things that were not intended to be part of the picture.

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