I am currently conduting my first film tests being new to large format ...and am reading all that I can and making as many mistakes as I can...among the many th ings that I don't understand is the following seeming inconsistency:
- I am aware that you have to compensate for exposure for subjects that are take n at distances close to the camera...something to do with light fall-off and bel lows extension.
- In many of the film test books, it mentions get a grey card/or similar, FILL t he screen with the image, then focus on infinity.
I have to get fairly close to my gray card to fill my screen...Do I need to make any compensation factors due to the subject distance or not? And, if not, why not? Or, more importantly, if I use a small grey card, can I position it close to my camera (4x5, 320mm bellows, 150 or 90 mm lens) and not worry about compens ations?
I have learned a tremendous amount from this forum in the past and hope that I c an get some basic advice this time round...thanks in advance.
Malcolm Fox.
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