The Sigma BF is a mirrorless, full-frame camera that embodies a revolutionary design and functional philosophy that makes this an unusual camera in the photography world. The camera is constructed from one piece of aluminum, so it is not only a stunning-looking camera but also extremely durable. Minimalist design is completed with a rubbery grip that makes it easy to hold even without a sculpted grip. The camera is small in size, having dimensions of 130.1 x 72.8 x 36.8mm and weighing 446g, matching other small full-frame designs like the Sony A7C II and Panasonic S9.
One of the best features of the Sigma BF is storage space inside. Unlike most cameras, it has no memory card slot but instead has 230GB of in-camera storage. This allows for up to 14,000 JPEGs or 4,300 uncompressed RAW files, and about 2.5 hours of 6K video. This design strategy is appropriate considering the camera’s minimalist philosophy but may be limiting to users who want external storage.
The Sigma BF features a 24.6MP full-frame sensor, which produces excellent images with very good color and detail rendition. It supports 14-bit RAW, 16,384 tones per color, which is very useful in post-processing. It has 13 in-camera color profiles, or Fujifilm film simulations equivalent, which allow one to achieve varied aesthetic looks. Outstanding profiles are the Warm Gold mode, providing warm colors and desaturated hues. A setting to enable custom film simulations is absent, however, a disappointment compared to brands like Fujifilm.
Autofocus capability is a shining star of the Sigma BF. It utilizes on-sensor phase detection, enabling speedy and correct focusing with appropriate tracking. Autofocus also accurately detects faces and animals and excels in portraits and street shots. There’s also continuous shooting at up to 7fps, although relatively relaxed compared to other modern-day cameras.
Video-wise, the Sigma BF can record 6K at 30fps using H.264 or H.265 compression, and comes with Sigma’s Log color codec for color grading. It also records 1080p slow-motion video at up to 120fps. The minimalist design of the camera and the lack of features like a tilting screen, microphone jack, and optical stabilization, however, make it less ideal for serious video work. The digital image stabilization available on video recording can also add a visible crop.
The Sigma BF user interface is unconventional, removing the typical PASM modes. Instead, users select which to control manually and which to put in auto. This simplifies the shooting experience but may be a bit of an adjustment for those accustomed to more complex interfaces.
Overall, the Sigma BF is a fashion-conscious and portable camera good for travel and everyday use. Its unique look and quality build make it a fashion statement as much as a photography tool. While it excels in some ways, such as autofocus and picture quality, its shortcomings in video capabilities and flexibility may make it less desirable to some shooters. Despite such constraints, the Sigma BF is an intriguing alternative for those desiring a utilitarian yet stripped-down camera.
