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An intuitive tool designed to radically simplify imagemaking, the 24.6MP full-frame Sigma BF Mirrorless Camera, reimagines the high-end digital camera interface to emphasize ease of use. The L-mount, hybrid-AF body also boasts 6K video capabilities, resulting in a camera that produces high-quality imagery at will.
An intuitive tool designed to radically simplify imagemaking, the 24.6MP full-frame Sigma BF Mirrorless Camera, reimagines the high-end digital camera interface to emphasize ease of use. The L-mount, hybrid-AF body also boasts 6K video capabilities, resulting in a camera that produces high-quality imagery at will.
Sleek, Intuitive Design
The Sigma BF marks a turning point in mirrorless camera design. Every point of user interface from body to screen has been reconceived to streamline the image creation process, allowing users unprecedented access to the beauty unfolding in front of the lens.
Streamlined UI
The primary user interface of the live-view rear touchscreen has been redesigned for distraction-free shooting, where exposure settings like shutter speed, aperture, ISO sensitivity, EV compensation, and color mode all find their natural home. The live-view itself has been streamlined to allow shooters maximum focus on their subject, while a small status monitor above the rear dial pad clearly displays the active settings. All other options and settings are accessible via three simple menu screens.
Physical Design
The Sigma BF's forward-looking physical design concentrates all controls into just three buttons: a dial, a shutter release, and a power button. A rear dial pad allows further navigational control. All of these physical controls are pressure-sensitive haptics-driven, giving the user intuitive response to their touch. The camera also features a first-of-its-kind "unibody" build, as each camera is carved from a single block of aluminum, yielding a balanced, uniform weight distribution. A thumb grip in the upper right corner adds a small but crucial ergonomic element for handling the camera.
Performance
A 24.6MP full-frame, backside-illuminated CMOS sensor powers the camera's high-end imagery. The camera has a wide dynamic range, a native ISO sensitivity of 100-102400 expandable on the low end to ISO 6, and the large sensor which benefits both low-light performance and low depth-of-field effects. Continuous shooting is possible at up to 8 fps, and the camera produces 14-bit DNG lossless RAW files in addition to JPEGs. A hybrid phase detection and contrast detection autofocus ensures quick and accurate focusing. Additionally, remote shutter release is possible with the optional CR-51 cable release.
Internal Storage
One of the notable features of the Sigma BF is its 230GB of internal storage, translating to more than 14,000 JPEG files, 4,300 uncompressed RAW files, or 2.5 hours of video. Additionally, a USB-C port offers data-transfer speeds of 10 Gb/s for external storage.
Video Capabilities
The Sigma BF can record video in up to 6K 30 fps and reaches up to 120 fps when shot in Full HD. The camera also supports L-Log color grading and HVEC encoding. Electronic image stabilization is supported when shooting video, benefitting smooth footage capture, and on a full battery the camera can record continuously for an hour. A built-in microphone atop the camera captures stereo sound, with support for an external microphone or headphone output. The USB-C terminal also allows users to output video and use the Sigma BF as a webcam.
L-Mount Compatibility
Sigma is a member of the L-Mount Alliance, and the BF's L-mount for lenses affords users access to the broad range of high-quality lenses from Sigma, Panasonic, and Leica.
Color Modes
The Sigma BF comes pre-loaded with 13 different Color modes, allowing users to apply color filters to their imagery for expanded creativity: Standard, Rich, Calm, Powder Blue, Warm Gold, Teal and Orange, FOV Classic Blue, FOV Classic Yellow, Forest Green, Sunset Red, Cinema, 709 Look, and Monochrome.
UPC: 198983942315
Sigma BF Specs
Key Specs
Lens Mount
L-Mount
Effective Sensor Resolution
24.6 Megapixel
Image Sensor
Full-Frame
Image Stabilization
Digital
ISO/Gain Sensitivity
Native: 100 to 102,400
Max Recording Modes
H.264/H.265 Up to 6K at 29.97 fps
Max Video Output
No
Media/Memory Card Slot
No
Video I/O
No
Audio I/O
No
Power I/O
1x USB-C Input
Other I/O
1x USB-C (Data) Output (Shared with Power Input)
Display Type
Fixed 3.1" Touchscreen LCD Status Display (Rear): LCD
13.7 oz / 388 g (Body Only) 15.7 oz / 446 g (With Battery)
Packaging Info
Package Weight
2.07 lb
Box Dimensions (LxWxH)
9.4 x 5.2 x 3.4"
Sigma BF Reviews
Great camera for limited use cases
By Isaac
Rated 5 out of 5
Date: 2026-07-23
I wouldn't use this camera as my go-to photography camera by any means. Even for standard video I would use something else. However this works incredibly well paired right into your computer for capturing pictures and video automatically into an application. Camera itself is very well built. Autofocus is about what you would expect for the technology.
Fun to shoot with
By Kevin
Rated 5 out of 5
Date: 2026-02-08
I’ve really enjoyed shooting with the BF. I’ve had it for about five months, and it delivers great autofocus and excellent image quality. I’ve taken it on vacation a couple of times and it’s performed beautifully. The menu system is very intuitive. I do wish the battery life were a bit longer, but it’s not a deal-breaker—I just picked up a spare. Overall, I’d definitely recommend it.
See any errors on this page?
Does the Sigma BF have an OLPF?
Does the Sigma BF have an OLPF?
Asked by: Anugraha
No, the Sigma BF Mirrorless Camera does not have a low-pass filter.
Answered by: Elliot
Date published: 2025-02-26
Does the BF have a Media/Memory Card Slot?
Does the BF have a Media/Memory Card Slot?
Asked by: Austin
The Sigma BF Mirrorless Camera doesn't have a Media/Memory Card Slot.
Answered by: Samik G
Date published: 2025-07-14
Set my BF to Auto ISO..Min ISO to 100. Yet in auto
Set my BF to Auto ISO..Min ISO to 100. Yet in auto ISO Ap Priority, Base ISO won't go below 400? Have to manually select 100,Is that normal?
Asked by: Randy
The Sigma BF Mirrorless Camera (Silver) set to auto ISO, minimum 100, and aperture priority will set the ISO to 400 or higher. It's best if you do want 100 ISO; do not set it to auto ISO.
Answered by: Rob K
Date published: 2026-07-28
Does the battery need to be removed for charging?
Does the battery need to be removed for charging?
Asked by: Kevin
No, the battery in the Sigma BF Mirrorless Camera (Silver) does not need to be removed for charging.
Answered by: Lucia B
Date published: 2025-03-10
Which Sigma series (DG or DG-DN) is recommended ...
Which Sigma series (DG or DG-DN) is recommended for the Sigma BF?
Asked by: A
the I Series primes are particularly well suited to pairing with the BF in terms of size and aesthetic, these would be the DG Contemporary prime lenses. the smaller ones would be the 17mm f4, 24mm f3.5, 45mm f2.8 and 90mm 2.8; the f'2's are a little bigger but a little more flexible and include a 20mm, 24mm, 35mm, 50mm and 65mm. cheers!
Answered by: Aaron
Date published: 2026-04-13
Does the Sigma BF come with kit lens?
Does the Sigma BF come with kit lens?
Asked by: Gabe
No, the Sigma BF Mirrorless Camera (Silver) comes with no kit lens.
Answered by: Idris A
Date published: 2025-03-03
Does the Sigma BF support tethered shooting?
Does the Sigma BF support tethered shooting?
Asked by: Marlon
Sigma says at this time the Sigma BF Mirrorless Camera (Silver) is not compatible with any software to be tethered.
Answered by: Rob K
Date published: 2025-03-31
Can the BF be powered via external power bank via ...
Can the BF be powered via external power bank via USB C?
Asked by: Felix
The USB input on the Sigma BF Mirrorless Camera can be used to provide power to the camera.
