I have a 90mm/copal#0 rodenstock 4x5 lens that the shutter failed, so i bought a mint/new 150mm rodenstock to take the copal#0 from and when I went to switch them out I noticed that the 150mm had an additional spacer ring on the front. It looks like it snaps in.
My question is how does it come out?
any info would be great, the 90mm's diameter is too great to fit inside this spacer and the spacer is not on my old 90's shutter or on my new 65mm lens either.
I can post photos if that would help.
THanks, mark
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