The Sigma DP3 Merrill is a high-end compact digital camera made by Sigma Corporation. It features a 46-megapixel Foveon X3 sensor (4704 × 3136 × 3 layers) and a 50mm f/2.8 fixed lens (75mm in 35mm equivalent focal length).
See also List of large sensor fixed-lens cameras
References
http://www.dpreview.com/articles/2261907078/sigma-dp3-merrill-price-and-availability http://www.dpreview.com/articles/1431165397/sigma-dp3-merrill-foveon-75mm-equivalent