From a photo blog dedicated to test shots taken by professional photographers, usually with their assistants standing in for the models, often with light meters or color charts in hand to make sure the colors stay true in post-processing. As Jason Kottke notes, the photos are often charmingly more candid than the end results we see in ads and magazine spreads. I find it fascinating because it reveals how much the photographer's (and assistant's) work on setup and lighting contributes to the glamor of the finished product: all the photo assistants look quite good, and often much more interesting than the models and celebrities who'll be in the final image.