Re: PHOTO-3D digest 1127

[bobh@xxxxxxxxxxxxx (Bob Howard)]

RE: DofF and Sunny 16 rule etc. Dr. George

Well the actual standard exposure in a Leica for Kodachrome WESTON 8
was 1/60 f/6.3 (between f/5.6 & f/8). When ASA came along this film
was rated at ASA 10 (splitting exactly WESTON 8 and GE 12). So with
that in mind the sunny-16 rule is 1/10th at F/16 for that film.
Practically becomes 1/25 at f/11 in Realist. BobH
(The slow speeds on a Leica of 1/8, 1/15, 1/20, 1/30, 1/60 were
meaningful with SLOW films of time. Not much effect with fast films)


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