Camera
Inspiringly simple: Sigma BF review-in-progress
The Sigma BF is a minimalist 24MP full-frame mirrorless camera that offers distinctive design and an unconventional user interface.
Key specifications
- 24MP full-frame CMOS sensor
- Phase detection AF with human and animal detection
- No mechanical shutter
- 3.2″ 2.1M dot rear touchscreen
- Pressure-sensitive buttons with haptic feedback
- 6K video up to 30p, 4K up to 30p
- 1080 up to 120p
- Leica L-Log profile
- Zebras and False Color exposure displays
- 230GB of internal memory
- 10Gbps USB-C port, external mic compatible
The Sigma BF is available in Black or Silver at a cost of $2000. Sigma has also made versions of all its i-series primes to match the silver version of the camera.
Index:
What is it?
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The Sigma BF is explicitly not trying to be a do-everything, Swiss Army Knife of a camera. Sony’s a7C II already exists, bringing an EVF, multiple dials, a mechanical second-curtain shutter mechanism and in-body image stabilization, for a list price just 10% higher than the BF’s.
But if Sigma was trying to go head-to-head with Sony in the mass market, it probably wouldn’t be spending seven hours milling each camera out of blocks of aluminium, nor doing so in Japan: neither of which is the approach you take if you’re primarily driven to hit a specific price point.
Similarly, just looking at the specs, the BF might be mistaken for an unstabilized Panasonic S9 in a fancier body, but despite sharing a sensor, the two cameras couldn’t be more different.
Instead Sigma explicitly says the BF is designed for ‘everyday’ photography. An elegant object designed to be carried with you, rather than a utilitarian device you take when you’re taking photos. It’s absolutely not optimized for rapid operation, it’s not teeming with clever features. Instead it includes only the bare essentials for photography (or, arguably, slightly less than that, given its lack of mechanical shutter).
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Think of it like a Moleskine notebook: in many respects it’s not as practical for taking notes and recording ideas as the smartphone you’re already carrying, but the very process of carrying it with you acts as a prompt to look at the world and capture the thoughts you were having. The BF is trying to do the same.
It’s the difference between a camera that you’d grab when you want to go and take photos of something, vs a tool that encourages you to look for things to photograph.
Body and controls
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User interface
The best way to understand the BF is to note the dedicated settings display towards the top right-hand corner on the back of the camera. This displays one of ten parameters:
| Drive mode | File format | Aspect ratio | Focus mode | White balance |
| Shutter speed | Aperture value | Exp comp. | ISO | Color mode |
These are also the ten parameters that appear on the main screen if you press the center button on the back of the camera, in the pattern shown in the table above.
You can navigate between them by pressing the cardinal points on the rear dial, then scroll the dial to change the current setting.
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Pressing the center button lets you see and edit the camera’s core ten parameters, but the chosen setting is also shown in the dedicated settings display to the top right of the screen.
In this instance the aperture value is shown in dark grey because it’s being controlled from the lens. |
But you don’t have to press the center button and bring them up on the main screen: once you’ve learned their relative positions (and chances are it’s the ones in the bottom row you’ll change regularly), you can navigate around them just using the settings display. And, for me, that’s the key to understanding the BF: it’s designed so that the core settings can be adjusted without looking at the main screen. You can set the camera to show all the settings on the main screen,
In keeping with this idea, the touchscreen is almost solely used for positioning the AF point or selecting a subject to track: even if you summon-up the settings on the main screen, you can’t tap to change settings, just choose what to focus on.
Exposure modes
The BF has no mode dial, so exposure mode is set by selecting which parameters you want to be controlled by the camera. This is done via the main screen. Press the center button to bring up the settings then press it again to edit them, and the ISO, aperture value and shutter speed indicators show ‘Auto’ options above them, letting you engage and disengage automated control of each parameter.
Any of the exposure parameters that can’t be changed by spinning the dial, either because they’re set to Auto or because aperture value is being set by an aperture ring, is rendered in darker grey, both in the settings display and on the main screen display.
Other settings
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| Ten further settings, including the level gauge and options to display information such as focal length and focus distance are accessed via the three-dot button. Navigating down to the word ‘System’ takes you to the menu where fundamental settings such as date and time are edited. |
Another ten settings, six of which relate to how much detail appears on the main screen (exposure parameters, guides, virtual horizon, etc), can be accessed by pressing the ‘three dots’ settings button. At the bottom of this settings menu is the word ‘System’ which gives you access to a ten-option-long list of fundamental camera settings, including firmware information, copyright information, menu language and date/time.
That’s the extent of the BF’s interface: ten top-level parameters, ten settings and ten menu options. But what this doesn’t fully convey is the degree to which it’s a camera in which Shutter speed, Aperture value, Exposure compensation and ISO can all be set using just the settings display, leaving the monitor solely for focus and composition.
Handling
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The BF is a very solid-feeling camera, as you might expect from something hewn from a solid block of metal. The body itself is relatively light but the weight adds up as soon as you mount a lens of any appreciable size on it.
Despite it’s minimalist appearance, it’s quite easy to hold. The textured front-plate and raised thumb rest at the back mean you can get a pretty solid grip on the camera, and you can cradle the weight of the lens in your left hand if you’re working with anything larger than one of the compact primes offered by Sigma or Panasonic.
However, we found that it was common for our ring finger to wrap around to the base of the camera as we held it, which quickly makes apparent how sharply angled the edge of the BF is. It’s not hard to imagine users adding a little tape to the lower edge of the camera or being tempted to chamfer the edge with a fine file, once they come to live with the camera.
I’ve primarily used it with the Sigma 35mm F2 prime and the Panasonic 20-60mm F3.5-5.6 lenses, both of which are small and light enough that it’s been comfortable to use.
Battery
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The BF uses a new 11.88Wh BP-81 battery. This will power the camera to a CIPA rating of 260 shots per charge. As always, the CIPA figure will tend to under-represent how many shots you’re likely to get, and we found it’s the camera’s propensity to show its charge percentage on its settings display that caused us to worry a little disproportionately.
Still, a rating of 260 is pretty low and means you may want to consider carrying a power bank if you plan to do more than occasional shots each day. Putting it on to charge overnight, just as you might do with your phone will probably be sufficient for everyday casual use, though.
A gentle press of the power button puts the camera into standby mode, but the battery will continue to drain at an appreciable rate. The BF starts up from cold quickly enough that this is usually a better approach.
Initial impressions
By Richard Butler
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| Even the body cap is an over-engineered delight. |
The Sigma BF is one of the most unusual cameras we’ve ever encountered. On paper it looks like an under-specced rival to the Panasonic DC-S9 or even the Sony a7C II. Or, perhaps even a slightly re-purposed Sigma fp. But, even though it shares components and a small rectangular body, the BF is quite unlike any of these cameras.
Sigma’s CEO, Kazuto Yamaki talked about completely re-thinking the camera’s interface to pare it back to the fundamental things a camera needs to offer, in an attempt to make it simple to use, with the aim of making a camera for everyday use. And the more I use the BF, the more I think I understand this intent.
The idea of a dedicated settings display, leaving the main screen as a means of composing your image and positioning the focus point is a refreshingly simple one, undermined only by the challenge of viewing a fixed LCD in bright light. The decision to display only one setting, rather than a full array of settings and icons makes it very quick to interpret and I did find it made me consider what changes I wanted to make, shot-to-shot, in a way I don’t on a more conventional twin-dial camera.
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Playback mode has three levels of information that can be displayed, this is the most detailed, but you can also opt just to see the top two rows of information, or just the first.
Touching, rather than pressing, the playback button lets you review the last image you shot, without entering the full playback mode, for as long as your finger remains on the button. |
This really hit home when I realized I prefer to set aperture from the camera, rather than using an aperture ring; I think the camera works best with everything controlled from the settings display, rather than trying to increase the number of control points.
Another surprise was how good the BF’s autofocus appears to be. Its subject tracking is very simple to use and impressively tenacious, while its eye detection works well and can be left turned on without minimal risk of the camera prioritizing nearby faces ahead of a different subject you’ve selected.
There are distinct downsides, though. The lack of mechanical shutter not only means there’s a risk of rolling shutter and that the camera can’t be used with flash, it also means it’s quite prone to banding caused by the inherent flicker of artificial lights. This can be fairly subtle at longer shutter speeds but becomes increasingly apparent in short exposures, limiting its use as an indoor camera, despite a sensor that works well in low light.
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Sigma 35mm F2.0 | F4.0 | 1/500 sec | ISO 400
Photo: Richard Butler |
Sigma’s sometimes quite dramatic color modes may not be to everyone’s tastes, and I’m not wholly convinced by the ‘Light Source Priority’ auto white balance mode, that tries to maintain some of the character of the detected light source. But even when the results are unexpected, they’re often interesting.
The BF’s battery life is also quite short. An external charger is available, if you want to keep a second battery topped-up, but mainly it’s a case of remembering to put the camera on to charge regularly, just as you might for your smartphone.
Other than a slight concern about the sharp lower front edge, I’m really looking forward to spending more time with the BF. It’s not a camera that lets you respond quickly to the unexpected; instead it’s one that makes you slow down and look for the photos you might otherwise not notice.
Sigma BF sample gallery
| Image: GoPro |
While the word “Black” in GoPro camera names signifies it is the top-of-the-line model, it has, for some time, also referenced the color of the action cams. While there were silver and white GoPros at one point, the last six generations have all exclusively featured an all-black design. Now, the white color is back for a time, since the action camera giant has announced a limited edition white version of the GoPro Hero13 Black.
While some may simply prefer white for aesthetic reasons, it also has some practical use. If your GoPro falls somewhere, white is generally more noticeable than black, making it easier to locate. Of course, the opposite is true for snow sports, but against grass, rock and other surfaces, white will stand out.
The GoPro Hero13 Black in Polar White is exactly the same as the black version but with a white exterior. The durable action camera offers 5.3K60 video, HyperSmooth 6.0 stabilization and a Type 1/1.9 (6.3 x 5.5mm) CMOS sensor. It uses GoPro’s long-lasting Enduro battery, providing 1.5 hours of continuous recording in 5K 30p or 4K 30p.
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| Photo: GoPro |
Like the black color, the Hero13 Black in Polar White is compatible with the new interchangeable HB-Series Lenses. These lens mods use auto detection, so you don’t have to change settings when attaching a new lens. Options include an Ultra Wide Lens Mod, Macro Lens Mod and a set of four ND filters. Additionally, the Anamorphic Lens Mod, which results in cinematic-looking 21:9 ultra-wide footage, is also available for purchase as of today. It’s been a bit of a wait for that lens, as it was initially announced in September last year.
The limited edition Polar White model is available for purchase today on GoPro’s website for $400, the same price as the original version of the GoPro Hero13 Black. If you already own the Hero13 Black but like the idea of having a white camera, you can purchase a white silicon sleeve with a lanyard to reskin your camera. That sleeve is also available in blue and black.
Buy now:
Press release:
Introducing the Limited Edition Polar White Color of the Award-Winning GoPro HERO13 Black
Best-In-Class 5.3K Video, HyperSmooth 6.0 Video Stabilization and Interchangeable HB-
Series Lenses Compatibility in a Crisp New Color
SAN MATEO, Calif., March 24, 2025 /PRNewswire/ — Today, GoPro (NASDAQ: GPRO) announced its flagship HERO13 Black camera is available in a limited edition Polar White colorway. Available today for $399.99.
Now customers can elevate their adventures and capture every moment in style. The striking new color brings a fresh look to GoPro’s flagship camera, which features best-in-class 5.3K60 video, HyperSmooth 6.0 video stabilization, legendary GoPro durability, magnetic mounting and the powerful Enduro battery.
The camera is compatible with the all-new, interchangeable HB-Series Lenses with Auto Detection. These lenses make it easy to expand the range of creative shots you can capture with HERO13 Black:
- The industry’s widest-angle, most stable, immersive POV shots with the $99.99 MSRP Ultra Wide Lens Mod
- Close-focus shots with the $129.99 MSRP Macro Lens Mod
- Easy-to-achieve motion blur using the $69.99 MSRP ND Filter 4-Pack
- Hollywood-looking cinematic 21:9 ultra wide-angle shots using the $129.99 MSRP Anamorphic Lens Mod
Combining HERO13 Black in Polar White with a GoPro Premium ($24.99 first year for new subscribers and $49.99/year thereafter) or Premium+ ($99.99/year) Subscription adds the ability to auto-upload your footage to the cloud, receive automatic highlight videos via the GoPro Quik App, save up to 30% on accessory purchases at GoPro.com, no-questions-asked damaged camera replacements and more.
HERO13 Black in Polar White is available now at retailers globally and at GoPro.com.
March Editors’ photo challenge: Water
The theme for our March Editors’ photo challenge was ‘Water’. We asked you to show us the essence of water in its many forms.
DPReview photographers rose to the occasion as usual, flooding us with stunning submissions. We were awash in incredible photos – many more than we can present here. Our top picks on the following pages are presented in random order.
Want to participate in some other photo challenges? Visit our Challenges page to see currently open or upcoming challenges or to vote in a recently closed challenge.
The underside of water
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Photographer: Thorgnyr
Photographer’s description: Often during winter, Lake Thingvallarvatn freezes. The view of the ice from below can be spectacular, especially during the thaw period; the ice has broken into flakes and then froze again. This was the case when this picture was taken. I started taking pictures without the diver but felt the scale was missing. So I got my buddy to pose for me.
Equipment: Canon EOS 5D Mark III
Frost
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Photographer: JTF MKE
Photographer’s description: On a cold winter day, there was frost on a bathroom window. Taken using a tripod in the morning with angled early sunlight. Patterns were entirely random, created by lots of humidity and the hand of Mother Nature.
Equipment: Olympus E-510 (EVOLT E-510) + Olympus Zuiko Digital ED 50mm 1:2.0 Macro
Surf paddle out for life, and a good friend
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Photographer: sundot
Photographer’s description: Surf Paddle out as we do in Hawaii when someone passes with a connection to the ocean. Friends gather for one last shout-out to send a farewell. The skies cleared, and the ocean lit up for the sendoff.
Equipment: DJI Mavic
Throwing up walls
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Photographer: owenleve
Photographer’s description: Former Olympian/US Ski Team athlete Daron Rahlves waterskiing on Bocca Reservoir in Truckee, California. “Throwing Up Walls” refers to the “wall” of water produced from each turn.
Equipment: DJI Mavic
Only four drops
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Photographer: froggy42
Photographer’s description: This picture of a water sculpture consists of only four drops of water falling in specific fractions of a second, one after the other, onto a water surface. They generate this sculpture that exists only for a fraction of a second. Our eyes are not fast enough to see the sculpture. To take this picture, a flash had to be used to achieve a very short exposure time. To achieve the correct time intervals, I used a Miops Waterdrop Kit.
Equipment: Fujifilm X-T2 + Fujifilm XF 18-135mm F3.5-5.6 R LM OIS WR
Water fields
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Photographer: 75RobinH
Photographer’s description: Red seaweed cultivation on the east coast of Zanzibar. During low tide, the “seaweed women” with their multi-colored dresses (kanga) enter these water fields similar to small gardens to tend their plantations. The seaweed is fixed to sticks connected by strings. About every two weeks, they harvest it and spread it out to dry. The seaweed is used in the production of cosmetics (soaps, creams, oils etc.), partly produced locally; most is exported. This demanding work is not only a source of income but is also very important for the social life, dignity and development of the women of Zanzibar. The warming of the ocean is seriously endangering these crops.
Equipment: Sony SLT-A58 + Sony DT 18-55mm F3.5-5.6 SAM II
Steam to water to ice: In a millisecond
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Photographer: joemellor
Photographer’s description: I’d been thinking about this fun stunt throughout our ski holiday in Norway. It needed a low sun and a very low temperature. Most of the week was cloudy and too warm. The perfect opportunity arose, but the sunny location was a several-minute walk (run) from a source of hot water. With a single vacuum flask of boiling water, there was only one opportunity to get this right. I begged my subject to stand absolutely still in front of the sun as he threw the water as I didn’t want the sun directly on the lens. Fortunately, my camera takes 20 frames per second, and I was able to select the best from around eight shots showing the development of this arc of steam/water/ice. We then returned to our cabin’s warmth and were delighted with our first-time success!
Equipment: Sony Cyber-shot DSC-RX100 VII
Strangers
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Photographer: 3rkaer
Photographer’s description: We all come from the water. We are mostly made of it, but at the same time, we are all strangers to each other in this crazy world.
Equipment: Leica SL2-S
Misty morning in Grand Teton
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Photographer: Stan Petersen
Photographer’s description: This was shot in Grand Teton National Park in early October 2006. The crowds were gone for the season, and this place along String Lake was quiet, except for the bugling of bull elk on both sides. Mists were moving along the lake, and Mount Moran started to show through as the pre-dawn magenta light hit the top.
Equipment: Canon EOS 350D (EOS Digital Rebel XT / EOS Kiss Digital N) + Canon EF-S 18-55mm F3.5-5.6
Under
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Photographer: Cliff Connell
Photographer’s description: On one of the last hot days in autumn 2011, just before our southern Australian Easter swell kicked in, I had just finished a long session of surfing some pretty big, clean waves when I decided to get back in to capture some in-water shots of the rest of the crew. Most of the shots I got that morning were pretty average, except for this one of a young guy duck diving under the closed-out section of a 5-6 foot wave. It made my day!
Equipment: Canon EOS 20D + Tamron SP AF 17-50mm F/2.8 XR Di II VC LD
Iceland highlands
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Photographer: GreenFirePhotography
Photographer’s description: Photographing Iceland felt like being inside a fairy tale at times. This image always draws a critical eyebrow or two. People throw around A.I. However, that’s just how amazing Iceland looks.
Equipment: Hasselblad L2D-20c
Waterbrella!
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Photographer: Maureeneo
Photographer’s description: I took this photograph of a moment of pure joy – one of those instances where laughter and spontaneity take over. The sun was bright, the summer air thick with warmth, and cool water was the perfect antidote. But the community swimming pool wouldn’t be open for another hour, and my granddaughter couldn’t wait that long. So, she improvised a mini water park for herself, using an umbrella exactly the opposite way an umbrella should be used! I love the contrast between the black umbrella and the cascade of sparkling water. The way the droplets catch the light. The way her hair clings to her face. Here she is, soaked but carefree, reveling in the cascade she created. I think I captured that feeling: the giddy, unstoppable energy of being a kid, where even the simplest things can bring so much joy.
Equipment: Sony Cyber-shot DSC-RX10 III
Calm summer evening
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Photographer: Lars Wara
Photographer’s description: Being on a lake when the water is dead calm, all quiet except a few birds and an occasional trout breaking the surface… Well, that’s pure therapy!
Equipment: Sony a6700 + Yonguo 11mm F1.8
Powerful wedge wave
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Photographer: vbuhay
Photographer’s description: The powerful waters of the “wedge” can be frightening for the average surfer. But for some of the strongest surfers, it is a challenge…
Equipment: Nikon D850 + Nikon AF-S Nikkor 70-200mm f/2.8G ED VR II
Atlantic sunset
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Photographer: bravoricardo
Photographer’s description: It was a beautiful afternoon at Praia das Milícias in São Miguel, Azores, so I decided to go for a swim with my water housing. After a couple of hours on the shore break trying different water angles, I managed to position myself inside this perfectly lit barreling wave, facing the sun setting behind São Roque church.
Equipment: Canon EOS-1D X
Window frost
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Photographer: Bram Floria
Photographer’s description: Waiting for the defroster to kick in, Spokane, WA, on January 26, 2025. On a bright, cold morning following a night of ice storms, the water came out to play as leaves of crystal.
Equipment: Google Pixel 6a
Divining rod
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Photographer: morelens
Photographer’s description: This is a lovely stream in upstate NY. Believe it or not, this location is on the far end of a cemetery. I was standing in the water to take this photo, and the water and the breeze cooled me off on this hot day – one of the many advantages of photography.
Equipment: Canon EOS R + Canon EF 17-40mm F4.0L USM
A gentle touch
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Photographer: wfoto
Photographer’s description: High-speed pictures of moving water will amaze you with the small details we cannot see in real life: every bubble in the foam, tiny sprinklets coming out of each crest, and the contact of the water with sand.
Equipment: Canon EOS 6D Mark II
Frisco Pier
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Photographer: Keith Hudspeth
Photographer’s description: The goal of this photo was to show the raw, destructive power of water. Frisco Pier was built in 1962 and stood strong until Hurricanes Isabel and Earl struck the Outer Banks in the early 2000s. I took this photo in 2016 before it was finally dismantled in late 2017.
Equipment: Nikon D750 + Nikon AF-S Nikkor 24mm F1.8G ED
Shower cap
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Photographer: Anne25
Photographer’s description: The subject burst a balloon full of water above his head. The balloon was hung from a support and burst using a spike on a stick. I wish I had taken a later shot capturing the look on his face due to the cold shock.
Equipment: Canon EOS-1D Mark IV + Canon EF 400mm F5.6 L
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Out-of-camera JPEG. 50mm equiv. crop.
F4 | 1/450 | ISO 80 |
This week, Fujifilm announced the GFX100RF, a 102MP medium format camera with a fixed 28mm equiv. F4 lens. The sensor will be familiar to those who’ve seen samples from the GFX100 S II or GFX100 II, but the lens is an interesting factor – the company says it put a lot of engineering work into it in order to make it as compact as it is.
You can get a feel for what kind of results it produces from the samples we took with our pre-production unit. We were lucky enough to get to test the camera out in a variety of locals; many of the pictures are from Prague, as Fujifilm flew us out for its X Summit and Fujikina event, but there are also images from London, Paris and, of course, Washington.
We’ve added some new photos taken since our initial review went up, including ones taken using a tripod to remove hand shake as a limiting factor on resolution.
Please do not reproduce any of these images on a website or any newsletter/magazine without prior permission (see our copyright page). We make the originals available for private users to download to their own machines for personal examination or printing; we do so in good faith, so please don’t abuse it.
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