Phew! A review that took quite a bit longer than I had expected. The Sigma SD9 is the first digital SLR to utilize Foveon's revolutionary X3 sensor. The X3 sensor is the first image sensor capable of capturing full color (RGB) at each pixel location. The SD9 is based around Sigma's SA9 film SLR and has all of the normal SLR functionality you would expect, the SD9 takes Sigma SA mount lenses, writes images in RAW (.X3F) format onto Compact Flash Type I or II cards. See how the SD9 did in our tests and comparisons.

Click here for our in-depth Sigma SD9 review