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		I have been getting consistent over-exposures when I use the bellows extension factor calculator in Expo Dev.  Usually I tell it how far the subject is from the lens.  Would I get better results if I used the "EXT" option and tell it how many millimeters the bellows is extended?  My lens for my 4x5 camera is 150 mm.  So, anything beyond that is "extended"?   |  
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