The Sigma BF is a radical take on the full-frame mirrorless camera: a unibody aluminum body machined from a single ingot in Japan, stripped down to the essentials of light, sensor, and lens. Its 24.6 MP back-illuminated full-frame sensor delivers high-resolution stills and 6K video, while 1,215-point hybrid autofocus keeps focus sharp and responsive. With no viewfinder, no mechanical shutter, and no memory card slot, the BF replaces physical controls with a minimalist 3-button, 1-dial interface and a 3.2-inch fixed touchscreen. A 230 GB internal SSD handles storage, while USB-C provides charging, video output, and data transfer. Thirteen built-in color modes, webcam mode, and in-camera DNG development give creators a compact, distraction-free tool built for the moment—not the spec sheet.