Sigma BF – Silver

Overview
Simple, clear, and completely new user interface. The Sigma BF is a radically simple camera that evokes the essence of photography, offering an unprecedented intuitive shooting experience. The camera focuses on the joy of photography by simplifying and stripping away all excess elements, redefining the process of taking a photograph as a natural act.

The BF features a unibody structure, internal storage, various color modes, evolved autofocus, video shooting capabilities, and is equipped with an L-Mount. The user interface is completely new, with main shooting-related settings stored on the live view screen, making it easy for users to operate important shooting elements at the touch of a finger. The minimal controls and haptics, along with the clear live view and status monitor, provide a seamless shooting experience for photographers.

Included in box
BF Camera Body Silver – L Mount
Li-ion Battery Pack BP-81
Metal Body Cap (Silver)
Start Guide
Limited Warranty
Warranty Sticker

About the Sigma BF – Silver
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 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.
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 ingot 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 colour modes

Thirteen different colour 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.

Type Interchangeable-lens Mirrorless Type Digital Camera
Memory Media Internal Memory (Approx. 230 GB) , USB Storage (for Backup)
Lens Mount L-Mount
Image sensor 35 mm full-frame (35.9 mm x 23.9 mm) Back-illuminated CMOS sensor
Camera Effective Pixels / Total Pixels Approx. 24.6 MP / Approx. 25.3 MP
Still Image File Format Lossless compression RAW (DNG) 14-bit / JPEG (Exif3.0) ,
RAW(DNG) + JPEG: recording is possible
Image Aspect Ratio [21:9], [16:9], [3:2], [A Size], [4:3], [6×7], [1:1]
Still Image File Size (RAW) 6016 x 4012
Still Image File Size (JPEG) 6016 x 4012
Crop 3840 x 2560 (Equivalent to Approx.1.5 times the focal length)
Movie Format MOV: H.264, H.265, L-Log
Audio Format Linear PCM (4ch 48 kHz / 16-bit: Max)
Movie Recording Size / Frame Rate 6K* (6K: 6016 x 3384) / 23.98, 25, 29.97 fps *Cannot be used in conjunction with EIS
UHD 4K / 23.98, 25, 29.97 fps
FHD / 23.98, 25, 29.97, 50, 59.94, 100, 119.88 fps
Continuous Shooting Enable Time 2 hours
AF System / Focus Mode Image Plane Phase-Detection AF + Contrast detection system / Single AF,
Continuous AF (with moving object prediction function), Manual Focus
AF Sensitivity Range / AF Mode -5~18 EV (F1.4：ISO 100)
1-Point AF, Area AF, Subject Tracking AF (Human + Animal, Human, Animal)
AF Lock Half-press the shutter button
Other Focus Functions AF+MF, Full-time AF+MF, MF Magnification (Full Screen, PIP (2x / 4x / 8x) ) ,
MF Auto Review, Focus Peaking, Focus Ring Control (Non-linear, Linear)
Metering Mode Evaluative, Spot Metering
Metering Range -7~20 EV (50mm F1.4: ISO 100)
Exposure Mode (Still) (P) Program AE, (S) Shutter Speed Priority AE, (A) Aperture Priority AE, (M) Manual
Exposure Mode (Movie) (P) Program AE, (S) Shutter Speed Priority AE, (A) Aperture Priority AE, (M) Manual
ISO Sensitivity (Recommended exposure value) Base ISO
[Still] ISO 320
[Movie] MOV: ISO 320, Log: ISO 1250
Settable Range
ISO 100-102400 / Expanded sensitivity ISO 6, 12, 25, 50
Exposure Compensation ±5 EV (in 1/3 stop increments)
AE Lock Operated via touch
Exposure Bracket 3 shots, 5 shots stage exposure ±3 EV (1/3 Step, Standard→Underexposure→Overexposure) (Sequence changeable)
Exposure Assist Brightness Level Monitor (Histogram) , Zebra Pattern, False Color
Image Stabilization System Electronic Image Stabilization (EIS) for Video Only
White Balance 8 types
(Auto, Auto [Lighting Source Priority] , Incandescent, Fluorescent, Manual [50K steps] ,
Daylight, Overcast, Shade, Flash) , Custom 1-10 settings can be added , AWB lock function
Shutter Electronic shutter
Shutter Speed 1/25600 – 30 seconds, Bulb (up to 5 minutes)
Self Timer 2 sec., 10 sec. (Countdown Indicator)
Drive Modes Single Capture, Continuous, Exposure Bracketing, Focus Bracketing, Interval Timer
Continuous Drive Speed Selectable frame rates (3, 5, 8 fps)
Number of Recordable Frames JPEG: 1000 frames, DNG: 350 frames
Monitor / Coverage TFT color LCD, Aspect Ratio 3:2, 3.15 type, Approx. 2.1M dots ,
Electrostatic capacitance system touch panel / Approx. 100%
Color Mode 13 types
Standard, Rich, Calm, Powder Blue, Warm Gold, Teal and Orange, FOV Classic Blue, FOV Classic Yellow,
Forest Green, Sunset Red, Cinema, 709 Look, Monochrome
Other Function Save / Load Settings, Webcam, In-camera DNG Development,
Still image capture from recorded movie files, Fill Light (Supports only in-camera DNG Development)
Built-in Microphone / Speaker Stereo Microphone / Monaural Speaker
Display Launguage English, Simplified Chinese, Traditional Chinese, Danish, Dutch, Finnish, French,
German, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Spanish, Swedish
Interface USB Type-C USB 10 Gbps (USB 3.2) Compatible (Mass Storage, UVC, UAC,
External Video Output, Charging / Power Delivery)
REMOTE: Supports Cable Release
External Microphone and Headphone Output: Supported
Dust and Splash Resistant Structure* Provided
*Although this construction allows the lens to be used in light rain, it is not the same as being waterproof.
Power Li-ion Battery Pack BP-81
Number of Recordable Still Images Approx. 260 images
Minutes of Recordable Continuous Shooting Approx. 60 min.
Dimensions (W x H x D) Approx. 130.1 x 72.8 x 36.8 mm / 5.1 x 2.9 x 1.4 in.
Weight Approx. 446 g / 15.7 oz. (including battery) , Approx. 388 g / 13.7 oz. (Camera Body Only)
Operating Temperature 32 to 104 °F / 0 to + 40 °C
Operating Humidity 85 % or less (non-condensing)
Supplied Accessories Li-ion Battery Pack BP-81
Metal Body Cap (Black / Silver)
Start Guide
Limited Warranty
Warranty Sticker
Optional Accessories Cable Release CR-51
Battery Charger BC-81
Hand Strap HS-11B
Hand Strap HS-11G

Simple, clear, and completely new user interface
Clear live view and status monitor
Minimal controls and haptics
Unibody structure
Internal storage
Various color modes
Evolved autofocus
Video shooting (6K, L-Log)
Equipped with L-Mount