I have a EKC, Eastman Kodak Company B&L 1910 lens with a US aperture system. I showed it to Sam Vinegar of Classic Camera, Grosse Pointe MI, 15 or 20 years ago and he told me there were several systems competing for the market and the one we currently use won out. He provided me with a conversion chart that I have since lost. Anyone out there have such a chart? And, in regards to my Conley triple convertible lens, 1907, how do I know if an aperture system on an old lens is our current one? Also Does anyone out there know if Sam Vinegar is still in business?
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