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Sigma is not a company that shies away from thinking outside the box, and here we have a prime example of Sigma allowing its engineers to think and try new things.
Even if I don’t buy this camera from Sigma, I really appreciate that they are pushing the boundaries.
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This camera is focused solely on taking pictures and video with the camera getting out of your way. The Sigma BF is equipped with a 24MP Full frame sensor and can shoot up to 6K video.
This minimalist camera also lacks a mechanical shutter, which, depending on the sensor’s readout speed, may cause issues with both stills and video.
Sigma BF – No SD Card
The Sigma BF doesn’t have any real connections to the outside world, lacking both Wi-Fi and Bluetooth. But even more interesting is that there is no external memory, as it uses 230GB of internal memory, something we haven’t seen much of from camera manufacturers. Sigma says this will support around 4300 uncompressed DNG raw files or 2.5 hours of video at the highest quality settings.
Sigma BF Rear Controls
The Sigma BF has a very innovative status screen on the back of the camera, which changes depending on what you are adjusting.
The combination of three buttons and the dial pad allows the user to quickly change various camera settings. The buttons are pressure sensitive haptic buttons.
Sigma BF Rear LCD
The rear LCD screen can provide a clear distraction free view with only shutter speed, aperture, ISO, EV compensation and color mode displayed.
The rear LCD is a TFT color LCD with a 3:2 aspect ratio. It consists of 2.1M dots and is a capacitive touch panel.
Sigma BF Body Construction
Sigma claims this was milled out of a solid piece of aluminum, giving it a very strong and solid feel. Sigma claims this is the first camera to be created from an aluminum unibody which takes up to 7 hours to mill.
The camera weighs in at 446g including the battery and is 130mm x 72.8mm and 36.8mm deep.
It’s expected to retail around $2000 and is available in black or silver.
Sigma BF Key Features
- 24.6MP Full-Frame BSI CMOS Sensor
- Radically Simple, Unibody Camera
- Hybrid Phase & Contrast Detection AF
- ISO 100-102400
- 6K30, Full HD 120p Video
- 230GB Internal Memory
- Haptic-Responsive Controls
- 13 Color Modes
- 3.15″ 2.1m-Dot Rear Viewscreen
- L-Mount Compatibility
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.
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Sigma BF Specifications
| Price | |
| MSRP | $2000 |
| Body type | |
| Body type | Rangefinder-style mirrorless |
| Body material | Aluminum |
| Sensor | |
| Effective pixels | 25 megapixels |
| Sensor photo detectors | 25 megapixels |
| Sensor size | Full frame (36 x 24 mm) |
| Image | |
| Uncompressed format | RAW |
| Screen / viewfinder | |
| Articulated LCD | Fixed |
| Screen size | 3.2″ |
| Screen dots | 2,100,000 |
| Touch screen | Yes |
| Live view | Yes |
| Viewfinder type | None |
| Storage | |
| Storage types | Internal only |
| Storage included | 230GB |
| Connectivity | |
| USB | USB 3.2 Gen 2 (10 GBit/sec) |
| USB charging | Yes |
| Microphone port | No |
| Headphone port | No |
| Physical | |
| Dimensions | 130 x 73 x 37 mm (5.12 x 2.87 x 1.46″) |
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Sigma BF Gallery
