Originally posted by Balog I started "Understanding Exposure" but I must admit I've gotten a bit discouraged by it. He explains the "exposure triangle" well, but when I got to the part about ISO he made some very disparaging comments on higher iso's and specifically stated he was primarily a natural light shooter and assumed his audience was as well. Since the majority of my pictures are taken indoors at night, it rather seemed like Mr Peterson was telling me his book wasn't for me.
Some of his readers are using small-sensor P&S cameras, where raising ISO can give really bad results. DSLRs have only recently been able to give decent results at higher ISO. Even software wasn't that good at noise reduction processing until Lightroom 3 or CS5; you had to use dedicated plug-ins. With my *ist DS, I would try everything before reluctantly going any higher than base ISO, 200.
So maybe his advice is a little out of date. With a recent DSLR, you can probably double any of his ISO suggestions and be fine. Just this morning, I took a shot at ISO 400 and hardly shuddered at all.