Sigma fp Mirrorless Full-Frame Digital Camera with 45mm f/2.8 Contemporary DG DN LensSigma fp Mirrorless Full Frame Digital Camera The Sigma fp is the world's smallest and lightest full frame mirrorless camera. It employs a back illuminated 35mm full frame Bayer sensor with 24. 6 effective megapixels for high quality images. Covered on the front and back sides with die cast aluminum alloy for its superior robustness and thermal conductivity, the compact body of the Sigma fp is built with a signature heat sink structure and sealing on