Sigma BF

The Sigma BF is a full-frame mirrorless camera released in 2025. Its 24.6-megapixel sensor and Leica L mount define what it offers: a modern stills platform with room to grow a lens collection.

For photographers, that combination suits anyone who wants large prints, generous cropping and predictable wide-angle framing. Hybrid shooters also get 6K recording and an L-Log profile, so one body can cover both photo and video work.

Owning it means buying into the L-mount system, where lenses come from more than one manufacturer, so the camera can adapt as your shooting changes.

The BF records video at up to 6K resolution. That headroom is useful in the edit, where you can crop in for a tighter composition or reframe a shot and still have plenty of pixels for the final output.

L-Log recording is on board as well. A log profile captures a flatter image that holds more highlight and shadow information, which gives you latitude to set the look in post rather than locking it in while shooting.

Together they suit projects that expect grading, such as short films or client work. Simpler clips do not require log, but the 6K ceiling means footage shot casually still has resolution to spare for later delivery.

At the heart of the BF sits a 24.6-megapixel full-frame sensor. That resolution is enough for large prints and leaves room to crop into a frame while keeping usable detail. When you cannot get any closer to your subject, the extra pixels give you a second chance at composition later.

The full-frame format also means lenses render at their marked field of view, with no crop factor to work around. Wide lenses behave as their focal lengths suggest, which matters for landscapes, interiors and any shot where framing must be predictable.

Sigma chose the Leica L mount rather than a proprietary fitting. Because several brands build lenses for this mount, you can grow a kit from more than one maker as your needs change, and the camera stays useful within that shared system.

The BF is a mirrorless camera released in 2025. Its design leaves out the mirror mechanism of reflex-style bodies, so light travels straight from an L-mount lens onto the sensor.

That mount is the physical interface for every lens the body takes. Because the L standard is shared, lenses come from more than one maker, which shapes how a kit can be assembled and expanded over time.

The same mounted lens serves stills and the 6K video mode, so optics carry over between photo and video work. An L-Log profile sits on the video side, giving this single body a grading-friendly option.