Quote Originally Posted by stavrosk View Post
How so?
Basically because the latitude of negative film is so great compared to slide film. Bear in mind that in the heyday of film, most photos were shot on disposables and cheap compacts, neither of which have meters, most photos come out fine.

This article is quite interesting:

http://www.twinlenslife.com/2010/12/...light-new.html

Shows ISO 400 film shot at ISO 25, still looks fine, you don't even lose the highlights too much. Slide film would look pretty awful though.