Sigma FP2 launches with 24.5MP partially stacked sensor

Sigma's FP2 uses a 24.5MP partially stacked back-illuminated full-frame sensor, the company announced. The second-generation L-mount body preserves the original FP's compact footprint while offering faster readout and expanded video options.

The FP2 weighs 376 grams without a battery and card and 460 grams with both, and measures about 4 cm thick. Sigma says the sensor's partial stacking arranges some readout circuitry around the sensor edges instead of placing a full additional layer behind it, improving readout speed without the complexity of a fully stacked design.

Video and stills

The faster readout enables flash synchronization up to 1/50 second, which Sigma describes as nearly twice as fast as the original FP. The camera can shoot stills at up to 20 frames per second, with a buffer that holds roughly 200 JPEG images or about 180 DNG RAW files. Sigma also says autofocus is quicker than before and that the FP2 can recognize birds for the first time.

For video, the FP2 supports 6K open-gate recording at up to 60p. It can record 4K at 60p across the full sensor width or 120p with a crop. The camera records 10-bit internally and supports Leica's L-Log profile. Sigma notes ProRes RAW recording is available at up to 6K/30p but requires an external SSD because bitrates can reach 5,800 Mbps, exceeding the capabilities of the UHS-II card slot.

Body, ports and accessories

The FP2 has a 3.2-inch tilting display with a 2.1 million-dot resolution and includes 70 GB of internal storage. It offers two USB-C ports: one operates at USB 2.0 speeds for power and accessories, while the other supports 10 Gbps transfers and connects to an external SSD. Sigma has replaced the original FP's micro HDMI connector with a full-size HDMI port.

There is no built-in viewfinder; Sigma offers the EVF-21, a 5.76-million-dot OLED panel that plugs into the upper USB-C port. The camera also supports the HU-21 hotshoe, which works with OM System and Panasonic flash protocols, and it is compatible with Panasonic hotshoe microphones for 32-bit float audio recording.

Sigma simultaneously introduced a 50mm F1.4 DG Contemporary prime in silver and black that fits L-mount and Sony E-mount bodies and weighs 375 grams; Sigma has not announced a price for that lens. The company also offers bundle options involving a new I-series 50mm F2 DG lens.

The FP2 goes on sale on November 11 at $2,199 for the body only. It is priced at $2,749 when bundled with the EVF-21 viewfinder, and the same $2,749 price applies to the body bundled with the new I-series 50mm F2 DG lens. For buyers focused on a small full-frame L-mount option, Panasonic's LUMIX S9 is available in the US for $1,499 and also records 6K open gate.

The FP2 retains the original model's compact intent while adding faster readout, expanded video formats and updated connectivity, alongside 70 GB of built-in storage.