Sigma BF Digital Camera Body - Black

The Sigma BF is a uniquely minimalist full-frame mirrorless camera featuring a 24.6MP back-illuminated CMOS sensor, hybrid AF with AI-powered subject detection, and 6K 30p internal video with L-Log. Its aluminium unibody integrates pressure-sensitive haptic controls for intuitive operation, while 230GB of internal storage removes reliance on SD cards. USB-C connectivity and L-Mount compatibility make it a high-performance choice for hybrid creators.

Sigma BF Digital Camera Body Key Features:

• Minimalist unibody design with haptic controls
• 24.6MP back-illuminated full-frame CMOS sensor
• Native ISO 100–25,600 expandable to ISO 6–102,400
• Hybrid autofocus combining phase and contrast detection
• AI subject recognition for people, cats and dogs
• 6K 30p internal video recording with Cinema DNG and MOV formats
• Full HD 120p recording for smooth slow-motion playback
• L-Log profile for extended dynamic range and flexible colour grading
• 13 built-in Colour Modes for consistent and creative looks
• 3.15-inch 2.1M-dot live-view LCD with streamlined UI
• Status Monitor showing active exposure settings at a glance
• 230GB internal memory for over 14,000 JPEGs or 2.5 hours of 6K video
• USB-C port supporting 10 Gb/s data transfer and charging
• L-Mount compatibility with lenses from Sigma, Leica and Panasonic
• Lightweight 388g aluminium body carved from a single block

A different kind of full-frame camera

The Sigma BF isn’t just another mirrorless release — it’s a redefinition of what a digital camera can be. Forgoing traditional dials and switches, it introduces a radically minimal interface that prioritises user intent and immersion. The pressure-sensitive haptic buttons are carved seamlessly into its unibody aluminium chassis, removing unnecessary distractions while maintaining fast, confident control of core settings. It’s a camera designed for those who want to focus purely on framing, exposure, and timing without visual clutter or menu fatigue.

Professional image quality without compromise

Behind the BF’s minimalist form lies a powerful 24.6MP back-illuminated full-frame CMOS sensor, delivering excellent dynamic range, reduced noise at high ISO, and richly detailed image capture. Its native ISO range of 100–25,600 (expandable to ISO 6–102,400) ensures strong performance across changing light conditions, from daytime street photography to low-light interiors. Sigma’s 14-bit RAW output gives photographers complete control in post-production, while JPEG shooters benefit from faithful colour and crisp detail straight out of the camera.

Reliable focus powered by hybrid AF and AI detection

Combining phase and contrast detection, the BF’s hybrid autofocus system provides confident focusing in both stills and video. It intelligently tracks people, cats and dogs using AI-trained subject recognition, keeping subjects sharp even during unpredictable movement. Whether you’re capturing fast-paced street scenes or spontaneous portraits, the BF’s autofocus speed and tracking precision deliver consistently sharp results with minimal input.

Video specs designed for content creators

With 6K 30p internal recording and support for both Cinema DNG and MOV (H.264/H.265) formats, the BF is well-equipped for creators who want cinematic output without a bulky setup. L-Log recording extends the dynamic range for flexible grading, while Full HD 120p enables fluid slow motion capture. Built-in stereo microphones, electronic image stabilisation and external mic support make it a viable option for professional hybrid shooting across varied environments.

Storage that goes beyond expectation

The BF removes the need for external cards thanks to its built-in 230GB of high-speed storage. Capable of holding over 14,000 JPEGs, 4,300 RAW files, or 2.5 hours of 6K video, this internal memory is ideal for travel, quick-turnaround shoots, and uninterrupted capture. With USB-C 10 Gb/s connectivity, transferring files or charging the camera is fast, efficient and reliable.

Unibody design built for durability and balance

Each Sigma BF is machined from a single aluminium block over seven hours, resulting in a seamless, durable chassis that weighs just 388g. This manufacturing process ensures a balanced feel with no structural weak points, while the streamlined body design complements any L-Mount lens. Controls and thumb grip placement are optimised for comfort, giving users stable, one-handed control even during extended use.

What’s in the box?

• 1 x Sigma BF Digital Camera Body
• 1 x Li-ion Battery Pack BP-81
• 1 x Metal Body Cap

FAQs:

Can I change the aspect ratio when shooting stills?

Yes, the Sigma BF offers multiple selectable aspect ratios to suit your composition needs. Options include 3:2, 16:9, 21:9, 4:3, 6x7, 1:1 and even A-size formatting. This feature allows photographers to optimise framing in-camera without cropping during post-production.

Does the Sigma BF have image stabilisation for stills and video?

The Sigma BF features electronic image stabilisation (EIS) for video recording, helping to reduce shake during handheld footage. However, still photography has no in-body image stabilisation (IBIS). For stabilised stills, use lenses with optical image stabilisation where available.

What accessories are compatible with the Sigma BF?

Sigma has a set of optional accessories designed specifically for the BF, including the CR-51 cable release, BC-81 battery charger, and HS-11 hand straps in black and green. These expand usability while maintaining the minimalist ethos of the camera.

Is the Sigma BF suitable for long-exposure photography?

Yes, the electronic shutter allows exposures up to 30 seconds or up to 5 minutes in Bulb mode. Combined with ISO 6 and manual focus aids like peaking and MF magnification, it's well-equipped for creative long-exposure shots.

What audio options are available when recording video?

The BF features a built-in stereo microphone and supports USB-based external microphone and headphone outputs. It records four-channel Linear PCM audio at 48kHz, 16-bit, which is suitable for both run-and-gun creators and post-production work.

Can I use the Sigma BF as a webcam?

Yes, the BF supports UVC (USB Video Class), allowing it to function as a high-quality webcam. Connect via USB-C and enable external video output to benefit from full-frame image quality during livestreams or video calls.