The XYZ gang are starting a serires on the state of DLSR photography, & trying to educate you all out there about the fact that it's really not too far removed from film photography these days. The first part of this series focuses (heh) on the lens.

"Volume 1 focuses on certain elements of digital single-lens reflex (DSLR) photography with helpful example photos and illustrations. It is a really informative article which explains how digital photography has not yet lost the metaphor of film."