Originally posted by music_lover I Learned a few things in Photo Class in High School, good for those who don't know what each number represents:
iso 100 outside, bright sunshine
iso 200 sunny to partly cloudy (i hope that was right)
iso 400 partly cloudy to cloudy
iso 800 cloudy or in the shade
iso 1600 night with plenty of light
iso 3200 night and available light
iso 6400 not quite pitch black
iso 12800 candlelight ( ihope that one was right)
anybody know these different from me, and please let's keep under wraps on the subject, please
It's not a terribly-bad set of guidelines, but it'd be as well to pay attention to the relationship between your shutter speed and aperture and sensitivity, as well as where your particular camera or film performs well.
You'll learn where the tradeoffs are, as you progress. You'll likely find that you needn't be so specific, and that your choice of ISO setting won't be confined to very particular conditions, so much as what you're doing.
(They're likely to move this thread, btw,)