Sigma BF
THE BEAUTY OF A
SIMPLE THING
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 center 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.
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
SIGMA BF IS LAUNCHING WITH 9 LENSES IN MATCHING COLORS
COLOR MODES
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 hishometown, Paris, and his birthplace, Norway, he captured people and objects in states of transition.
Read more
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.
FUMI NAGASAKA
For Japanese-born, New York-based artist Fumi Nagasaka, photography is a tool for connection. In December 2024, she took images in New York and Texas as part of an ongoing project to document everyday life in America.
New
BF
Available Mounts
L-Mount（Black）
L-Mount（Silver）
- 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
Type
Interchangeable-lens Mirrorless Type Digital Camera
Memory Media
Internal Memory (Approx. 230 GB), USB Storage (for Backup)
Lens Mount
L-Mount
Image Sensor
Type
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
Aspect Ratio
3:2
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]
File Size
RAW
6016 x 4012
JPEG
6016 x 4012
Crop
3840 x 2560 (Equivalent to Approx.1.5 times the focal length)
Movie Recording Format
Movie Format
MOV: H.264, H.265, L-Log
Audio Format
Linear PCM (4ch 48 kHz / 16-bit: Max)
Record Format / 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
Focus
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
AF Lock
Half-press the shutter button
Other Focus Functions
Subject Tracking AF (Human + Animal, Human, Animal) , AF+MF, Full-time AF+MF, MF Magnification (Full Screen 2x / 4x / 8x) , Focus Peaking, Focus Ring Control (Non-linear, Linear)
Exposure Control
Metering System
Evaluative, Spot Metering
Metering Range
-7 ~ 20 EV (50 mm F1.4: ISO 100)
Still Shooting
Program AE, Shutter Speed Priority AE, Aperture Priority AE, Manual
*The above can be changed by setting each of Shutter Speed, Aperture, and ISO Sensitivity to Auto or Manual.
Movie Shooting
Program AE, Shutter Speed Priority AE, Aperture Priority AE, Manual
*The above can be changed by setting each of Shutter Speed, Aperture, and ISO Sensitivity to Auto or 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) , 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
Drive Modes
Single Capture, Continuous, Self-timer Burst, Exposure Bracketing, Focus Bracketing, Interval Timer
Selectable frame rates (3, 5, 8 fps)
Selectable frame rates (3, 5, 8 fps)
Number of Recordable Frames
JPEG: 1000 frames, DNG: 350 frames
Monitor
Type / 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 / Restore 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 Language
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
Cable Release (via USB)
External Microphone Terminal
Supported via USB
Headphone Output Terminal
Supported via USB
Dust and Splash Resistant Structure*
Provided
*Although this construction allows the camera 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
Minutes of Recordable Continuous Shooting
Minutes of Recordable Continuous Shooting
Approx. 60 min.
Dimensions and Weight
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
Operating Humidity
Camera
SIGMA BF
Shutter Speed
1/125s
Lens F Number
F2
ISO
1600
Focal Length
35mm
Photographer
Fumi Nagasaka
Camera
SIGMA BF
Shutter Speed
1/2s
Lens F Number
F16
ISO
1600
Focal Length
24mm
Photographer
Fumi Nagasaka
Camera
SIGMA BF
Shutter Speed
1/125s
Lens F Number
F2
ISO
1600
Focal Length
35mm
Photographer
Fumi Nagasaka
Camera
SIGMA BF
Shutter Speed
1/250s
Lens F Number
F11
ISO
400
Focal Length
50mm
Photographer
Fumi Nagasaka
Camera
SIGMA BF
Shutter Speed
1/250
Lens F Number
F16
ISO
400
Focal Length
35mm
Photographer
Fumi Nagasaka
Camera
SIGMA BF
Shutter Speed
1/100s
Lens F Number
F4
ISO
400
Focal Length
50mm
Photographer
Fumi Nagasaka
Camera
SIGMA BF
Shutter Speed
1/400s
Lens F Number
F18
ISO
400
Focal Length
35mm
Photographer
Fumi Nagasaka
Supplied Accessories
Li-ion Battery Pack BP-81
Metal Body Cap (Black)
Metal Body Cap (Silver)
Separately Sold Accessories
Hand Strap HS-11G
Hand Strap HS-11B
Cable Release CR-51
