I've just made the jump to 8x10 and the Calumet c-1 (I think it's a c-1, it's bl ack and made of alluminium) I bought came with the lens, 8 1/2 inch (215 mm) f5 .6 ilex-calumet series-s caltar no.187. It has a copal no.1 shutter and the len s barrel on the light side of the lens lense board is chrome or stainless on the outside. Oddly it is stamped with the number 7917 on the side of the black bar rel on the other side of the lens board. I would like to know the coverage of this lens (image circle) and what the numbe r stamp on the lens barrel means. Also, on the side of the lens by the shutter speeds and apeture markings are sma ll characters: t=14" and directly underneath that is: f=8 1/2". Is this a conv ertable lens and how do I use it that way?
Thanks, Brian Merry
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