Forgive a LF newbie, but I have this Bausch and Lomb Cinephor projection lens and I realized I don't have a basic piece of exposure info.. the aperture. Hopefully you all can help, or point me in the right direction at least.
Here's the info I have:
B&L Cinephor Series I
Marked 4.50 (I assume that's 4.5 inches)
"In E.F." (what does that mean?)
If we don't know the exact aperture for this particular lens, is there a good starting point to run some bracketing tests from? I've had the lens for quite a while but just picked up a 4x5 press camera so I can finally play! I've shot 4x5 monorail before, but this older stuff is a new adventure.
Thanks for your help!
Chris
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