Product Information
Sigma BF
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.
- 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
- BF Camera Body Black - L Mount
- Li-ion Battery Pack BP-81
- Metal Body Cap (Black)
- Start Guide
- Limited Warranty
- Warranty Sticker
|
Type |
Interchangeable-lens Mirrorless Type Digital Camera |
|
Memory Media |
Internal Memory (Approx. 230 GB) , USB Storage (for Backup) |
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Lens Mount |
L-Mount |
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Image sensor |
35 mm full-frame (35.9 mm x 23.9 mm) Back-illuminated CMOS sensor |
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Camera Effective Pixels / Total Pixels |
Approx. 24.6 MP / Approx. 25.3 MP |
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Still Image File Format |
Lossless compression RAW (DNG) 14-bit / JPEG (Exif3.0) , RAW(DNG) + JPEG: recording is possible |
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Image Aspect Ratio |
[21:9], [16:9], [3:2], [A Size], [4:3], [6x7], [1:1] |
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Still Image File Size (RAW) |
6016 x 4012 |
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Still Image File Size (JPEG) |
6016 x 4012 |
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Crop |
3840 x 2560 (Equivalent to Approx.1.5 times the focal length) |
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Movie Format |
MOV: H.264, H.265, L-Log |
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Audio Format |
Linear PCM (4ch 48 kHz / 16-bit: Max) |
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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 |
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Continuous Shooting Enable Time |
2 hours |
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AF System / Focus Mode |
Image Plane Phase-Detection AF + Contrast detection system / Single AF, Continuous AF (with moving object prediction function), Manual Focus |
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AF Sensitivity Range / AF Mode |
-5~18 EV (F1.4：ISO 100) 1-Point AF, Area AF, Subject Tracking AF (Human + Animal, Human, Animal) |
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AF Lock |
Half-press the shutter button |
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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) |
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Metering Mode |
Evaluative, Spot Metering |
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Metering Range |
-7~20 EV (50mm F1.4: ISO 100) |
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Exposure Mode (Still) |
(P) Program AE, (S) Shutter Speed Priority AE, (A) Aperture Priority AE, (M) Manual |
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Exposure Mode (Movie) |
(P) Program AE, (S) Shutter Speed Priority AE, (A) Aperture Priority AE, (M) Manual |
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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 |
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Exposure Compensation |
±5 EV (in 1/3 stop increments) |
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AE Lock |
Operated via touch |
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Exposure Bracket |
3 shots, 5 shots stage exposure ±3 EV (1/3 Step, Standard→Underexposure→Overexposure) (Sequence changeable) |
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Exposure Assist |
Brightness Level Monitor (Histogram) , Zebra Pattern, False Color |
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Image Stabilization System |
Electronic Image Stabilization (EIS) for Video Only |
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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 |
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Shutter |
Electronic shutter |
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Shutter Speed |
1/25600 - 30 seconds, Bulb (up to 5 minutes) |
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Self Timer |
2 sec., 10 sec. (Countdown Indicator) |
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Drive Modes |
Single Capture, Continuous, Exposure Bracketing, Focus Bracketing, Interval Timer |
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Continuous Drive Speed |
Selectable frame rates (3, 5, 8 fps) |
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Number of Recordable Frames |
JPEG: 1000 frames, DNG: 350 frames |
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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 |
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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) |
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Built-in Microphone / Speaker |
Stereo Microphone / Monaural Speaker |
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Display Launguage |
English, Simplified Chinese, Traditional Chinese, Danish, Dutch, Finnish, French, German, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Spanish, Swedish |
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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. |
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Power |
Li-ion Battery Pack BP-81 |
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Number of Recordable Still Images |
Approx. 260 images |
|
Minutes of Recordable Continuous Shooting |
Approx. 60 min. |
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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 |
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Operating Humidity |
85 % or less (non-condensing) |
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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 |