Sigma BF + 28-70mm f/2.8 DG DN Contemporary black

A rigorously simple camera,
that evokes the essence of photography.

A full-frame mirrorless camera that offers an unprecedented intuitive shooting experience.
By getting close to the photographer, the Sigma BF captures the beauty that lies hidden in everyday life and becomes the trigger to become aware of that beauty.

The BF focuses on the joy of photography that a camera as a tool can deliver.
By simplifying and eliminating all superfluous elements, this full-frame mirrorless camera redefines the process of photography as a natural act.

The unique user interface, which creates a new sense of connection between the photographer and the camera in a seamless all-metal body, is more intuitive than ever with its haptic buttons and dials. The high-resolution full-frame sensor with approx. 24 megapixels and the reliable dual autofocus system bring visions to life.

Product features:
Simple, clear and completely new user interface
The user interface of the Sigma BF has a completely new information structure compared to conventional digital cameras: The most important shooting-related settings are located on the Live View screen, secondary settings in the optional menu and control functions and detailed settings in the system menu.

Shutter speed, aperture, ISO sensitivity, exposure compensation and color mode as well as other important shooting-related elements can be set simply with a tap of the finger. In combination with the automatic setting, the functions of the general shooting mode dial are also covered.

Clear live view and status monitor
The BF's standard live view screen shows only the minimum information required and can also be set to show no information at all. As the currently active setting is displayed on the status monitor, the photographer can concentrate solely on the composition and the subject on the Live View screen.

Minimalist controls and functional feel
Three buttons, a setting dial, the shutter release and the power button are all the camera's controls. The BF is the first mirrorless camera* in which the control dial, the center button, the option button and the playback button provide haptic feedback without being subject to physical wear and tear. The buttons can be operated precisely and comfortably.
* As of February 2025 according to SIGMA research

Unibody construction
The Sigma BF is the first camera in history* to have a true unibody with unprecedented rigidity. Each camera is machined from a single solid block of aluminum in a process that takes about seven hours. The pleasant weight of the seamless, reliable all-metal body harmonizes perfectly with any attached Lens.
* As of February 2025 according to SIGMA research

Internal memory
The Sigma BF has 230 GB of internal memory, which can store more than 14,000 JPEG files, 4,300 uncompressed RAW images or 2.5 hours of video footage in the highest quality. The USB-C port offers fast data transfer and charging speed.

Different color modes
Thirteen different color modes are available on the BF to open up new avenues of creativity. The modes range from unique options such as Teal and Orange, Powder Blue and Warm Gold to creative and versatile options such as Rich and Calm.

Advanced autofocus
The Sigma BF's hybrid autofocus system, which combines phase and contrast detection, uses state-of-the-art algorithms to capture subjects accurately and reliably. In subject detection mode, not only people but also dogs and cats can be recognized

Video recording (6K, L-Log)
The BF supports high-resolution 6K and L-Log recording, enabling video productions that take advantage of the wide dynamic range of this full-frame camera.

The SIGMA 28-70mm F2.8 DG DN | Contemporary redefines the standard zoom lens for mirrorless cameras:
It combines outstanding optical performance and a continuous aperture of F2.8 with a lightweight and compact body.

Design-wise, the 28-70mm F2.8 DG DN | Contemporary is based on the 24-70mm F2.8 DG DN | Art, but with a focal length range starting at 28mm. This makes the lens body significantly smaller and lighter, while maintaining the same outstanding optical performance.

The slightly smaller wide-angle range of the 28-70mm F2.8 DG DN | Contemporary compared to the 24-70mm F2.8 DG DN | Art has made it possible to significantly reduce the size of the 28-70mm body. The Contemporary concept balances performance and handiness.

The new Lens features a single, lightweight focusing element, so the AF unit can also be kept small. Together with a quiet and fast stepper motor, this ensures responsive and virtually silent autofocus performance.

The 28-70mm F2.8 DG DN | Contemporary weighs 470g on its own and just 890g when combined with the SIGMA fp, for example. At less than 1kg, such an outstandingly lightweight camera system gives photographers an enormous amount of freedom and flexibility to realize their creative visions. It is also a perfect choice for filmmakers looking for a powerful, lightweight and easy-to-handle camera system that also works well with a gimbal and other accessories.

Based on the design of the Art product line
The optical design of the SIGMA 28-70mm F2.8 DG DN | Contemporary is based on the 24-70mm F2.8 DG DN | Art, which is renowned for its outstanding optical performance across the entire focal length range. The 28-70mm F2.8 DG DN | Contemporary follows the core concept of the Contemporary product line: it was designed to offer the right balance of performance and handiness. In a body that is light enough for everyday use, this fast standard zoom lens thus delivers outstanding image quality that rivals lenses in the Art product line.

Outstanding build quality with attention to detail
The body of the SIGMA 28-70mm F2.8 DG DN | Contemporary, which was designed to be portable above all else, consists primarily of lightweight components.

Although conventional wisdom holds that it is more difficult to ensure processing accuracy with plastic parts than with metal parts, no compromises were made in the processing quality of the 28-70mm F2.8 DG DN | Contemporary. One reason for this is the use of the special polycarbonate TSC (Thermally Stable Composite), which has comparable thermal shrinkage to aluminum. This reduces the differences in thermal shrinkage between metallic and non-metallic components, ensuring consistent performance even under extreme temperature fluctuations. The use of polycarbonates in the construction of zoom and focus rings can make them appear less premium in practice. However, when these parts are carefully machined for precision and appropriately adjusted in motion by lubricants, the rings provide precise mechanics with an exceptionally high-quality feel.

Highest Optical Performance
The 28-70mm F2.8 DG DN | Contemporary makes use of state-of-the-art technology and features a modern optical design that includes three aspherical, two FLD and two SLD elements.

Despite the overall lower number of elements than the 24-70mm F2.8 DG DN | Art, the design still results in extensive correction of longitudinal chromatic aberration and sagital coma that cannot be corrected by camera. This allows users to create images that are consistently sharp from the center to the edge of the shot. In addition to the anti-ghosting design, the Super Multi-Layer and Nano-Porous coatings ensure well-controlled flare for high-contrast results even when backlit. The front lens of the Lens features a water- and oil-repellent coating.

The Everyday Companion
The SIGMA 28-70mm F2.8 DG DN | Contemporary offers a new and improved photographic experience to mirrorless camera photographers who need a fast standard zoom lens. Its high-quality, intuitive construction makes the lens as exciting to use as the incredible images it can produce - inspiring you to realize its creative potential.

Ghosting and Reflection Minimizing Design
An ideal lens directs incident light through all the lenses and onto the sensor. If, on the other hand, some of the light is reflected by individual lenses, not only does the light yield decrease; the reflections within the Lens create ghost images and aperture spots, or they reduce contrast. Such effects would be particularly noticeable in backlit shots.

To prevent this, our 28-70mm F2.8 DG DN | Contemporary uses Super Multi-Layer Coating (SML) and Nano Porous Coating, which reduce flare and ghosting. The result is clear, sharp, high-contrast images without distracting lens flares.

Compatible with the latest full-frame mirrorless cameras
The 28-70mm F2.8 DG DN | Contemporary is compatible with full-frame mirrorless cameras with L-mount or Sony E-mount.

A stepper motor is used for fast focusing. The autofocus with automatic eye detection used in newer mirrorless cameras is also supported; this makes precise focusing of portraits, for example, child's play.