Measuring just 4.3" x 2.75" x 1.78" and weighing just 13 oz., the Sigma fp is the world's smallest, lightest full-frame mirrorless camera. Its 24.6-megapixel Bayer sensor is backlit for superior low-light capability, while the body is made from die-cast aluminum alloy and sealed on 42 points to create a weatherproof structure. An electric shutter structure enables 18 frames/sec shooting, and 12-bit CinemaDNG external recording at 4K UHD/24fps produces film-quality video data via the USB 3.1 port. It uses L-Mount lenses, so in addition to Sigma's own line, it can use compatible glass from Leica and Panasonic. The fp will launch later this fall.