Sigma With overall dimensions of 112.6 69.9 45.3mm and a body weight of 370g, the SIGMA fp is the world's smallest and lightest interchangeable lens camera equipped with a full-frame sensor. Sigma fp employs a back-illuminated 35mm full-frame image sensor with 24.6 effective megapixels and a full-time electronic shutter, enabling to shoot virtually without sound, and no camera shake due to shutter shock. Even when shooting in quick succession at a frame rate of 18 frames/sec., it eliminates the tiniest of shakes. In addition, as opposed to conventional mechanical shutters, it does not cause irregularities on the screen display in a high-speed shutter setting. Furthermore, the absence of a mechanical shutter makes the SIGMA fp's camera structure simpler, which in turn improves its reliability.