Sunny F16 rule
FIlm with an ISO of 200 would be F16 at 1/250
Film with ISO 100 would be F16 at 1/100 or 1/125
From http://www.formodels.com/how-tos/Brianratty/f16.shtml
Here are some variations for a sunny day:
Full sun - f/16
Half sun - f/11
Open shade - f/8
Darker shade - f/5.6
Darkest shade - f/4
From: http://www.markushartel.com/tutorials/basics/sunny-16-rule.html
