Photokina 2010, Sigma releases SD1 SLR cameras.This is a SLR camera has which has aximum sensor size,the highest pixel in APS-C frame size,Another Waterproof all-weather is also to be mentioned as its selling point.

Sigma SD1 has 46 million effective pixels, using the Foveon X3 sensor. Sensor size is 24 × 16mm, which is currently the largest size in APS-C frame size. Current mainstream 7D sensor size: 22.3 x 14.9 mm, while the Nikon D7000 sensor was: 23.1 x 15.4 mm.