This article was in the outdoorphotographer magazines Dec 2003 issue. the article was written by David Stoecklein. I'm having trouble understanding exposures without a meter. He says on a bright sunny day he shoots 100 film at 1/500 f7.1, now he says he subtacts 1/3 of a stop but he still ends up with 7.1. you really have to see the article to understand what i'm trying to say here.If anybody can explain this to me it would help me understand the article. I beleive what he means is that his base f stop is 7.1 /500 and he opens it up 1/3 of a stop to give more exposure. there are more pictures he took in the article and they make sence to me but not the snow pictures. Any help would be appreciated. I also took this article down to the local Henry's camera store and the two girls there couldn't make any sence of it at all. They beleived the magazine made a mistake.