100 or 400 iso ?

The lower the ISO, the better the quality, but the more light you need. 400 ISO is for amateurs (your Mom and her point and shoot). If you want to take realy good portrait shots, get good lighting, and use 100, or even 72.

On the other hand. Some people really like the grainy look (it only looks good in B&W in my opinion). So if you wnat a grainy look, go with an even higher ISO 800, or 1000.

Bt make sure, if you want yur portraits to turn out awesome, that you use a diffuse filter.

Cheers

No one on their death bed has ever said 'I wish I had played it safe'

theres a fairly big difference. for portraits i would definatley go for the 100 iso. but for action shots(like skiing) i would go for a 200-400 iso, cause you dont need as much light, therefore allowing you to have a faster shutter speed.
also, having a lower iso, will make it so that if you want to enlarge the picture it will stay clear. personally i dont like the grainy look, so i rareley use anything higher than 200

He who dares wins

i pretty much keep T-Max 3200 in the camera at all times. most of my shots are inside bars during concerts


'He got fired? What did he do?'
'He jumped off of the roof again'