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| Old US F-stop System | |
| Author | Message |
|---|---|
| camz Joined: 15 Apr 2004 Posts: 138 |  Posted: Fri Dec 23, 2005 6:05 amI am looking for a conversion table for the old US f-stops. |
| Les Joined: 09 May 2001 Posts: 2682 | Posted: Fri Dec 23, 2005 12:37 pm There is a mathmatical formula but it's a whole lot easier to remember that F16 and US 16 are the same. Write the us scale. 1 2 4 8 16 32 64 128 256 Then start and 16 and work toward both ends 16 22 32 45 64 4 5.6 8 11 16 |
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