not sure, but it is a nice lens!
i had one for years ... and
rumor has it that stopped down it will
illuminate if not "cover" a 5x7 negative ..
have fun !
john
I think that since it is a 4x5 wide angle lens, with a small f-stop, it was a way to keep the cost down. It is handy that it also has a "T" setting along with "B".
Most of the 4x5 press lenses came with larger f-stops, and a wide range of shutter speeds.
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