|Posted: Tue Dec 16, 2014 5:41 pm Post subject:
|I think I read recently somewhere (and obviously I can't find it again) that B&W film should give acceptable results from 3 stops under-exposed to 1-stop over. This makes sense to me: shadow detail is retained in deeper shades of grey without all turning black. Conversely, colour negative / print film withstands over-exposure: the highlights retain colour though paler.
There are alternatives to the Sunny 16 rule, in this case Sunset 4 might be appropriate. Using that as a guide, which film speed would be suitable? (Assuming landscapes at f/11):
ISO 100: 1/100 @ f/4 = 1/50 @f/5.6 = 1/25@ f/8 = 1/10 @ f/11
ISO 400: 1/400 @ f/4 = 1/200 @f/5.6 = 1/100 @f/8 = 1/50 @ f/11
As long as the the focal length of the lens is normal (50mm) or wider, he should be able to hand-hold his camera with ISO400 film. Any slower and he'd need a tripod, which would probably be recommended for best results in any case.