Sigma BF + 90mm f/2.8 DG Contemporary Silver

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.

SIGMA's all-new medium telephoto lens for mirrorless systems - the compact 90mm F2.8 I-Series lens is versatile and its impressive optical performance makes it ideal for portraits, close-ups and photography at weddings and other events.

A brand new 90mm F2.8 DG | Contemporary premium lens joins SIGMA's growing I-Series product line. It joins the four existing I-Series fixed focal length lenses and the new 24 mm F2. This new medium telephoto delivers superior optical performance, offers a wide aperture of F2.8, features all-metal construction and is equipped with an aperture ring. It was developed from the ground up for mirrorless systems and is perfectly balanced for handling in combination with modern full-frame cameras. Its high resolution capacity meets all the requirements of the latest camera models with extremely high megapixel counts.

Its versatile telephoto focal length is the longest focal length of the I-Series Lens to date. But it remains remarkably light and compact, making it absolutely suitable for everyday use. The Lens is optimized in every respect for use in mirrorless systems, focuses quickly and reliably with the autofocus and shines with its optical performance. Its pleasant bokeh makes it the ideal portrait lens and the close focusing distance of 50 cm allows photographers to get closer to their subject.

The 90 mm F2.8 DG | Contemporary is a powerful, compact and robust lens for everyday use, whose interplay of high detail sharpness and contrasting background blur creates vivid and lively images.

1.
I-Series｜Compactfixed focal lengths in premium quality for mirrorless systems
The SIGMA I-Series consists of full-frame-compatible lenses that give users of mirrorless systems new, better alternatives - both in photographic practice and in terms of the impressive image results that can be achieved with them.

A key advantage of mirrorless cameras is their slimmer dimensions, and the new 90mm Lens is designed to complement these compact cameras without compromising on optical performance. Such a combination of outstanding optical quality with a compactness that was not possible in SLR systems points the way to the future of photography.

SIGMA recognizes that there is a wider range of photographic possibilities available today, especially since smartphones with camera functionality have become ubiquitous. But for many photographers who have more in mind when deciding to buy a camera and lens than just taking any picture, the I-Series lenses offer the ultimate combination of optical performance, convenient handling and great compactness.

Since its founding in 1961, SIGMA has continued to perfect its performance in the development and production of lenses, taking it to an even higher level in 2012 with the introduction of the Global Vision brand. From this basis, SIGMA is constantly thinking about the quality of its products, the feeling of photographing with them and the pleasure of owning them. This is how the I-Series was born.

2.
New optical performance standards in the Contemporary product line
The SIGMA 90 mm F2.8 DG | Contemporary boasts outstanding optical imaging performance and a resolving power that does justice to the latest mirrorless cameras with high megapixel counts.

The optical design uses the most advanced technologies, so that the Lens has five SLD lenses, among other things. This reduces longitudinal chromatic aberration, which cannot be corrected in the camera afterwards, resulting in high resolution and clear detail without color fringing. At the same time, a precision-molded asphere ensures high contrast transfer of the finest details in the focus area and a beautiful bokeh without color artifacts in the background - a bokeh that only a full-frame Lens can produce.

The Lens is also designed with in-camera correction in mind. This strategy has allowed SIGMA's lens developers to focus on correcting the aberrations that can only be corrected optically, improving overall imaging performance while reducing the size and weight of the lens.

With a close focusing distance of 50 cm and a maximum magnification of 1:5, close-up photography is also possible. The Lens exposes subjects at close range, allowing the photographer to emphasize fine details as well as create more abstract compositions.

The autofocus is driven by a fast and quiet stepper motor, which means that focusing works just as well for photos as it does for videos.

3.
The outstanding I-Series manufacturing quality in a compact form
All I-Series Lens are pure metal constructions. The precisely manufactured aluminum components not only give the tube a sleek, elegant finish, but also guarantee outstanding durability, which improves the quality of the entire product. The use of metal materials inside the Body also ensures smooth operation of the focus and aperture ring and additional robustness. These high-precision components, manufactured with SIGMA's innovative metal processing technology, are also used in SIGMA's cine lenses for professional filmmakers. This attention to haptics and ergonomics makes working with the lens a pleasure.

Other product features:
Lens construction: 11 elements in 10 groups, with 5 SLD and one aspherical lens
Internal focusing
Compatible with high-speed autofocus
Stepping motor
Compatible with aberration correction
* Function only available in combination with supporting cameras. In addition, the correction options may differ depending on the camera model.
Supports DMF and AF+MF
Super Multi-Layer Coating
Aperture ring
Focus mode switch
Round lens hood (LH576-02)
Magnetic metal lens cap (LCF55-01M)
Dust- and splash-proof lens cover and splash-proof lens mount
Reflection and ghosting minimizing design
Every single Lens passes through SIGMA's proprietary MTF measuring system
Nine rounded aperture blades
High-precision and robust brass bayonet