Sigma today announced the BF camera. The BF camera features a unique aluminum body design, of course, without any grip, but it’s a very rare design. And, of course, rig makers like SmallRig are always ready with some innovative solutions. But apart from this very unique body design, Sigma approached the basics very differently. They have added a 230GB internal memory in this particular camera, so you can record your videos uninterruptedly and continuously for 2 hours, even in 6K with the highest possible settings.
On the specifications side, the camera features a full-frame CMOS sensor with a 24-megapixel resolution. Users can record 6K videos up to 30 frames per second in L-Log.
The camera features a hybrid autofocus sensor for fast autofocusing and an AF sensitivity range from -5 EV to 18 EV @ f/1.4. It has a base ISO of 100.
Maximum ISO sensitivity is expandable. ISO sensitivity goes from 100 to 102400. We have dual base ISO, meaning that in movie mode, you have the base ISO of 320. When you switch to Log, you get the base ISO of 1250, which is highly usable for professional cinematographers. Other than that, we also have an expandable base ISO that starts from 6, 12, 25, and 50 to extract the maximum dynamic range possible from the scene.
The camera has an electronic shutter, not a mechanical shutter. Selectable frame rates are available. The continuous shooting speed of the camera is a maximum of 8 frames per second. In a single burst, you can store up to 2000 JPEG frames and up to 350 RAW DNG frames inside your camera.
The body design is minimal, and the camera uses a lithium-ion battery pack of BP-81, which can capture 260 images on a single charge and support 60 minutes of continuous recording in 6K.
PRESS RELEASE
Announcing the “Radically Simple” Sigma BF camera
Ronkonkoma, New York – SIGMA Corporation of America, the US subsidiary of SIGMA Corporation (CEO: Kazuto Yamaki. Headquarters: Asao-ku, Kawasaki-shi, Kanagawa, Japan) is pleased to announce the Sigma BF, a 24-megapixel full-frame L-Mount camera. The Sigma BF presents an uncompromising new vision for the digital camera. Stripped to the essence but packed with power, innovative yet rooted in the origins of photography, it is designed to accompany you throughout your day and to capture the spontaneous beauty of everyday life. The BF balances performance with simplicity and returns the focus to what matters most: your photographs. The Sigma BF will retail for $1,999 and be available in April 2025.
A radically simple camera that evokes the essence of photography
A full-frame mirrorless camera offering an unprecedented intuitive shooting experience
Staying close to the photographer, the Sigma BF captures the beauty that lies hidden in everyday life, and becomes the catalyst to be aware of that beauty.
The BF focuses on the joy of photography that only a camera as a tool can provide. By simplifying and stripping away all excess elements, this full-frame mirrorless camera redefines the process of taking a photograph as a natural act.
The unique user interface, which provides a new sense of connection between the photographer and the camera in a true seamless unibody, is more intuitive than ever with its pressure-sensitive haptic buttons and dial. The high-definition expression of the approximately 24-megapixel full-frame sensor and the reliable dual autofocus system bring your vision to life.
Key features
Simple, clear, and completely new user interface
The user interface has a completely new information structure compared to conventional digital cameras, with the main shooting-related settings stored on the live view screen, secondary settings in the optional menu, and management functions and detailed settings in the system menu. Users can easily operate the shutter speed, aperture, ISO sensitivity, EV compensation and color mode, along with other important shooting-related elements at the touch of a finger. Combined with the auto setting, the functions of the general shooting mode dial are also covered.
Clear live view and status monitor
The default live view screen displays only the minimum necessary information and can be changed to display no information at all. Since the currently active setting is displayed on the status monitor, the users can concentrate solely on composition and the subject on the live view screen.
Minimal controls and haptics
All controls are integrated into just three buttons, one dial, the shutter release, and the power button. The BF is the first mirrorless camera* to incorporate haptics into its Dial, Center button, Option button, and Playback button, resulting in minimal physical wear. The buttons are always accurate and comfortable to press.
* As of February 2025, by Sigma.
Unibody structure
The BF is the first camera in history* to feature a true unibody, which boasts unprecedented rigidity. Each camera is carved from a single, solid block of aluminum over the course of seven hours. The reliable, comfortable weight of its seamless all-metal body harmonizes perfectly with any attached lens.
* As of February 2025, by Sigma.
Internal storage
The BF features 230 GB of internal memory, capable of storing more than 14,000 JPEG files, 4,300 uncompressed RAW images or 2.5 hours of video at the highest-quality setting, with the USB-C port offering fast charging and data-transfer speeds.
Various color modes
Thirteen different color modes are available to open up new avenues of creativity. The modes range from unique options like Teal and Orange, Powder Blue, and Warm Gold to creative yet versatile options such as Rich, and Calm.
Evolved autofocus
A hybrid autofocus system combining image phase detection and contrast detection utilizes state-of-the-art algorithms to capture subjects accurately and reliably. In addition to people, dogs and cats can be detected in the subject detection mode.
Video shooting (6K, L-Log)
The BF supports high-resolution 6K and L-Log recording, enabling video production that takes advantage of the wide dynamic range of a full-frame sensor.
Equipped with L-Mount
The L-Mount lens mount allows the camera to be used with a wide variety of interchangeable lenses for mirrorless cameras from Sigma as well as other L-Mount Alliance partners.
