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THE BF CAMERA

Sigma BF
THE BEAUTY OF A
SIMPLE THING

With the Sigma BF, we present 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.

RADICAL SIMPLICITY

The Sigma BF’s most important feature is its simplicity. We wanted to create the easiest camera to use, inspired by the humble beginnings of the camera obscura. While the lens remains the soul of photography, the camera still profoundly shapes the images you take – directly, indirectly, even subconsciously. Without compromising on features or performance, the BF’s design cuts out everything that distracts from your interaction with the image. From its aluminum unibody to its simplified controls and streamlined menu, the BF embodies a pure photographic experience free of frustration.

SEAMLESS INTERACTION

The Sigma BF represents a new, more intuitive way to use a camera. It is streamlined to make the act of photography as effortless as possible. We have replaced the shooting mode dial – itself a holdover from the days of film photography – with direct access to the five elements that decide the photograph. Shutter speed, aperture, ISO, EV compensation and color mode are all immediately available at the touch of a finger. The new Status Monitor displays the currently active setting, so the screen provides an unobstructed view of the subject.

CLEAR VIEW

The BF's high-resolution screen provides a distraction-free view of all necessary information – and nothing more. With one simple setting, it shows only the live view image, with the five key elements – shutter speed, aperture, ISO, EV compensation and color mode – displayed when you are ready to press the shutter button. All other options and settings are accessed via just three simple menu screens.

AT A GLANCE

The innovative Status Monitor displays the active setting, highlighting exactly what you need to know without distraction.

TACTILE CONTROL

With just three buttons and a dial pad, the BF’s redesigned user interface makes adjustments instant and intuitive, leaving your attention on the scene and not the settings. As the first mirrorless camera*, the BF features pressure-sensitive haptic buttons, resulting in minimal physical wear while still offering the precise and tactile sensation of conventional mechanical buttons.

＊As of February, 2025 by SIGMA.

ENDURING FORM

The BF is designed to last. It is the first camera in history* to feature a true unibody, with each camera carved from a single, solid block of aluminum ingot over the course of seven hours. The weight of its seamless all-metal body harmonizes perfectly with any attached lens, while its shape, button placement and precision-cut front texture guarantee secure handling.

＊As of February, 2025 by SIGMA.

DECEPTIVELY POWERFUL

Simplicity does not mean limitation. The Sigma BF is packed with advanced technology to expand your creative possibilities. Its powerful full-frame sensor delivers exceptional image quality, while the fast, reliable hybrid autofocus system keeps subjects in focus.

SIGMA BF IS LAUNCHING WITH 9 LENSES IN MATCHING COLORS

COLOR MODES

HIGH RESOLUTION VIDEO

Some stories are best told in moving images. With 6k recording, powerful HEVC encoding, L-Log support and up to 120 frames per second, the Sigma BF provides filmmakers with a nimble, versatile camera to capture and refine their vision.

FULL-FRAME SENSOR

The BF's 35mm full-frame sensor means stunning details, exceptional image quality, wide dynamic range and brilliant low-light performance. The large sensor size also translates to a shallower depth of field to separate subject and background, and allows the use of high-quality full-frame lenses.

INTERNAL STORAGE

The SD card slot is replaced by 230GB 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.

CAPTURED WITH THE BF

The cameras we make are only part of the photographic story. What really counts are the wonderful images that photographers create with them.

We invited Ola Rindal, Fumi Nagasaka, and Sarah van Rij & David van der Leeuw to produce new work with the Sigma BF. Each artist captures the subtleties of everyday moments with their unique perspective and visual language. We hope you enjoy their photos as much as we did.

OLA RINDAL

Ola photographed moments that go unnoticed unless one pays attention. In December 2024, during journeys between his hometown, Paris, and his birthplace, Norway, he captured people and objects in states of transition.

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SARAH VAN RIJ & DAVID VAN DER LEEUW

Sarah van Rij and David van der Leeuw took to the streets of New York in December 2024, capturing cinematic moments that balance on the line between the real and the surreal.

Read more

FUMI NAGASAKA

For Japanese-born, New York-based artist Fumi Nagasaka, photography is tool for connection. She took images in New York and Texas in December 2024 as a part of an ongoing project to go document everyday life in America.

Read more

New

BF

Available mounts

  • L-Mount（Black）
  • L-Mount（Silver）
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  • 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

  • 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], [6x7], [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

  • Camera

    SIGMA BF

  • Shutter Speed

    1/125s

  • Lens F Number

    F22

  • ISO

    400

  • Focal Length

    35mm

  • Photographer

    Fumi Nagasaka

Download

  • Camera

    SIGMA BF

  • Shutter Speed

    1/2s

  • Lens F Number

    F16

  • ISO

    1600

  • Focal Length

    24mm

  • Photographer

    Fumi Nagasaka

Download

  • Camera

    SIGMA BF

  • Shutter Speed

    1/125s

  • Lens F Number

    F2

  • ISO

    1600

  • Focal Length

    35mm

  • Photographer

    Fumi Nagasaka

Download

  • Camera

    SIGMA BF

  • Shutter Speed

    1/250s

  • Lens F Number

    F11

  • ISO

    400

  • Focal Length

    50mm

  • Photographer

    Fumi Nagasaka

Download

  • Camera

    SIGMA BF

  • Shutter Speed

    1/250s

  • Lens F Number

    F16

  • ISO

    400

  • Focal Length

    35mm

  • Photographer

    Fumi Nagasaka

Download

  • Camera

    SIGMA BF

  • Shutter Speed

    1/100s

  • Lens F Number

    F4

  • ISO

    400

  • Focal Length

    35mm

  • Photographer

    Fumi Nagasaka

Download

  • Camera

    SIGMA BF

  • Shutter Speed

    1/400

  • Lens F Number

    F18

  • ISO

    400

  • Focal Length

    50mm

  • Photographer

    Fumi Nagasaka

Download

Supplied Accessories

Separately Sold Accessories