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glennfromwy
Joined: 29 Nov 2001
Posts: 903
Location: S.W. Wyoming
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 Posted: Tue Oct 01, 2002 9:51 pm Post subject: |
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Does anyone have a conversion chart that shows the old U.S. f/stop vs modern f/stop settings? I have that information somewhere, but am unable to find it, now that I need it.
Thanks in advance for any help you can offer.
-- Glenn -- |
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Les
Joined: 09 May 2001
Posts: 2682
Location: Detroit, MI
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| Posted: Tue Oct 01, 2002 10:19 pm Post subject: |
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F16 and US 16 are the same. You can move up or down the scale from there..... f22=US32 f11=US8 etc.
It's always amusing to find an f7.0 protar advertised as a SUPER FAST F3.5 Protar!!!!!!! |
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glennfromwy
Joined: 29 Nov 2001
Posts: 903
Location: S.W. Wyoming
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| Posted: Thu Oct 03, 2002 1:58 am Post subject: |
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| Thanks, Les! This post was to figure out how I could make use of an unmarked lens, probably a papid rectilinear, in an old Victor pneumatic shutter, roughly 170mm, I think. It is on an old Rochester Optical Premo "B" that was laying around collecting dust. When I dicovered that it would accept modern film holders, I scraped off 100 years worth of rotten leather and crud, and refinished it. Shutter fires consistently at 1/30. Snapped off a quick shot today and the negative looks pretty good. Now I have a 4X5 field camera with front rise and fall and rear tilt, that weighs in at 36 OUNCES! I wouldn't use it for anything too serious but it will be a barrel of fun to play with. |
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