Don’t be afraid of breaking the rules! Experimenting is fun. Do some tests, print your paper, decide if you like what you see. Please tell us your results. We want to hear.
It occurs to me that I know people who work only w/ MF and 35mm film, and they use, exclusively, the 4 11/16” condenser set w/ a 75mm lens. I’ve never heard them complain.
Using a 6.5” set and a 80mm lens for 645 and 6x6, as you wish, might not offer ideal light distribution, but your personal tests might prove very satisfactory.
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Maybe a quick review of “standard” combinations would be useful for those who are newer at this game:
The Omega D2 (non-v) is designed to use any one of three, interchangeable condenser sets (i.e., condenser pairs): the 3.5” set (35mm film), 4 11/16” set (MF), and 6.5” set (4x5):
— The 3.5” set is commonly matched w/ the typical 50mm lens on a flat board. This of course is for 35mm film.
— The 4 11/16” set is commonly matched with, say, 75mm and 80mm lenses on flat boards. Good for MF film. The 75mm lens would cover 645 and 6x6 film. The 80mm would, in addition, cover up to 6x7 safely. If enlarging 6x9 film, I think I’d go w/ a 105mm lens.
— The 6.5” set is matched with the 135mm lens (on a 2.75” cone) and the 150mm lens (on a 4.5” cone). Good for 4x5 film. The 150mm lens covers 4x5 a little more evenly, but you might not notice.
And for anyone who’s curious, the D2v (as opposed to the D-II or D2 non-v) uses a third “variable” condenser, making it possible to use it in conjunction w/ only one condenser set – namely, the 6.5” set – for 35mm, MF and 4x5 work. This can be convenient.
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