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Sony completes second round of AP testing of C2PA in-camera authenticity technology

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Sony completes second round of AP testing of C2PA in-camera authenticity technology


Photo: Sony

Sony has announced the completion of a month-long field test with the Associated Press to evaluate the performance of C2PA in-camera authenticity technology. In addition to the hardware-signed authentication written by the camera, the tests included working with ‘Photo Mechanic’ maker Camera Bits to develop a workflow in which this signature was preserved and any changes tracked.

Sony had previously announced business users of the a7 IV would be able to add secure signatures to their images, and has said this capability will now be expanded to other models.

Image manipulation has been a growing concern dating back to the beginnings of digital photography and photo editing software, even more so recently in the wake of AI tools that make manipulating and faking images far easier. Newsrooms and photojournalists are keenly aware that fake and manipulated images can sow confusion, mislead the public, and most concerning, undermine trust in factual journalism.

Sony hasn’t historically been the camera of choice for photojournalists, Canon and Nikon having dominated the sector for decades. But following its partnering with the AP in 2020, and its work as a steering committee member for C2PA (Coalition for Content Provenance and Authenticity), a project that brings together the efforts CAI (Content Authenticity Initiative) and Project Origin to address image provenance and authenticity, it’s making inroads.

Leica last month announced a camera that could digitally sign images and append C2PA-compliant metadata to its images, and Nikon has shown a prototype Z9 that does the same, suggesting the there may finally be some sort of industry consensus on the best approach to take.

Sony says it plans to add C2PA authentication via a firmware update for the a9 III, a1, and a7S III next Spring, signalling that the encryption hardware is already present in these models. That timing is likely intentional, as it’ll arrive just ahead of the Summer Olympic games and the US Presidential race, both key opportunities for a camera manufacturer courting photojournalists.

Sony Electronics and The Associated Press Complete Testing of Advanced In-Camera Authenticity Technology to Address Growing Concerns Around Fake Imagery

New In-Camera Signature Solution Attaches Digital Certificate to Photos at the Point of Capture to Certify Legitimacy

SAN DIEGO – Nov. 21, 2023 – Today, Sony Electronics announces the completion of a second round of testing for Sony’s in-camera authenticity technology with Associated Press. This in-camera digital signature allows for the creation of a birth certificate for images, validating the origin of the content.

Sony’s authenticity technology provides a machine-based digital signature, removing the opportunity for undetected manipulation at the start. The digital signature is made inside the camera at the moment of capture in the hardware chipset. This security feature is aimed at professionals wanting to safeguard the authenticity of their content and provides an extra layer of security to aid news agencies in their fight against falsified imagery.

“While the rapid evolution of generative AI (Artificial Intelligence) brings new possibilities for creative expression, it has also led to growing concern about the impact of altered or manipulated imagery in journalism,” says Neal Manowitz, President and COO of Sony Electronics. “The dissemination of false information and images has real world social impact that brings harm not only to our photojournalist and news agency partners, but to society as a whole. We care deeply about this challenge and are committed to using our resources to help solve it. Through Sony’s work on the steering committee for C2PA (Coalition for Content Provenance and Authenticity), we have helped set the current industry standard for the tracking of editing and manipulation of imagery. Additionally, our in-camera authenticity technology has shown valuable results, and we will continue to push its development towards a wider release.”

“Fake and manipulated images are a major concern for news organizations. Not only do they contribute to mis- and disinformation but ultimately, they erode the public’s trust in factual, accurate imagery,” said David Ake, AP Director of Photography. “We are proud to be working alongside Sony Electronics to create an authentication solution that can help combat this problem.”

Sony and AP’s most recent field test was completed during October of 2023. In this month-long test, both capture authentication and workflow process were evaluated. To accomplish this, Sony partnered with Camera Bits – the company behind the industry standard workflow tool, Photo Mechanic. Alongside Sony and AP, Camera Bits created technology in Photo Mechanic that preserves the camera’s digital signature all the way through the metadata editing process.

“We appreciate the significant challenge that manipulated imagery poses for our partners, and we are highly motivated to play a role in helping solve it,” says Dennis Walker, President and Founder of Camera Bits. “Photo Mechanic has been used by the photojournalism industry for 25 years and continues to evolve as the industry introduces new technology. We are committed to ensuring Photo Mechanic remains a trusted and authentic workflow solution.”

Sony’s new in-camera signature and C2PA authentication is planned for release in a firmware update in the newly announced Alpha 9 III, Alpha 1, and Alpha 7S III in the Spring of 2024 <1>.

<1> Timing for countries and regions may vary. Firmware support for C2PA formats may initially only be available to news agency partners.



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Red, Green and Blue: the winners of our April Editors' photo challenge

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Red, Green and Blue: the winners of our April Editors' photo challenge


April Editor’s photo challenge: RGB

In this month’s Editor’s photo challenge, we asked you to share your photos featuring a red, green and blue color palette. At this point, it’s no surprise that the DPReview community delivered – far from leaving us blue or red with anger, the images we’ve featured here made us green with envy.

Our top picks on the following pages are presented in random order. You can see all the photos submitted here.

Girl With Llama

Girl With Llama

Photographer: JeffryzPhoto

Photographer’s description: High up in the Andes Mountains of Peru near the Sacred Valley a girl walks with her pet llama. Even the llama is wearing red, green, blue, and white.

Equipment: Fujifilm X-T4 + Fujifilm XF 16-55mm F2.8 R LM WR

Athens in full spring

Athens in full spring

Photographer: xenofon

Photographer’s description: At the heart of Athens, a metropolis of 3.5 million people, nature can still be present with all its beauty and grandeur. Provided you have the will and the patience to look closely enough.

Equipment: Canon EOS R10 + Canon RF-S 18-150mm F3.5-6.3 IS STM

Cadillac #40

Cadillac Number 40

Photographer: Sergio Image

Photographer’s description: Going to see a race at the Sebring Raceway had been in my bucket list for many years. So to celebrate my retirement, my wife and I got the tickets and drove to this legendary track. For the first time, I experienced photographing what is now my favorite subject: race cars.

Equipment: Nikon Z9 + Nikon Nikkor Z 24-200mm F4-6.3 VR

RGB – Ryan, Gurcharan and Bhangra Smash Up

RGB Ryan Gurcharan and Bhangra Smash Up

Photographer: Peter Freeth

Photographer’s description: The band Bhangra Smash Up performing at a charity event, Ryan, one of the band members, captured from the side of the stage with the colourful lighting emphasising the high energy performance that always has everyone on their feet. Band leader Gurcharan looks on, a little too out of focus.

Equipment: Sony a7 IV + Tamron 70-180mm F2.8 Di III VC VXD G2

Busy Bazaar

Busy Bazaar

Photographer: LokeshS

Photographer’s description: During the Ramadan festival, the streets around the Shivaji Nagar locality of Bangalore turn into a virtual street fest. Food is the most popular item on sale and street vendors flourish. This picture was taken from behind one such vendor as wraps some kebab for a customer.

Equipment: Fujifilm X-E4 + Fujifilm XF 27mm F2.8 R WR

After The Harvest

After The Harvest

Photographer: OCDavo

Photographer’s description: A retired International A-160, quietly resting in the tallgrass, its weathered wooden bed and rust-warmed steel telling the story of a bygone era in the soft glow of early morning light.

Equipment: Olympus OM-D E-M5 + Olympus M.Zuiko Digital ED 12-40mm F2.8 Pro

Cap Fréhel

Cap Frehel

Photographer: Brecht_BE

Photographer’s description: The first summer things opened up again. We stood at the edge of Brittany, wind in our faces, the sea loud and endless. Everything felt sharply, undeniably alive.

Equipment: Olympus PEN-F + Olympus M.Zuiko Digital ED 12-40mm F2.8 Pro

Chlorophyll fluorescence

Chlorophyll fluorescence

Photographer: iso rivolta

Photographer’s description: Chlorophyll fluorescence shown in a test tube. When excited with UV light, chlorophyll emits red light. The shadow of the tube is both green and blue, the latter from paper’s fluorescence.

Equipment: Pentax KP + SMC Pentax-FA 50mm F2.8 Macro

Velvet dresses

Velvet Dresses

Photographer: lei945ca

Photographer’s description: In the Swiss Canton of Appenzell, they celebrate an old end-of-year tradition, called «Sylvesterchläuse». Participants wear red, blue, green and yellow velvet dresses, they shake cowbells and jodel during hours going from farmhouse to farmhouse. This is exhausting, so they need a break every now and then to rest and drink. In such a moment I took the picture.

Equipment: Sony Cyber-shot DSC-RX100 VII

Yorkshire phone booth

Yorkshire phone booth

Photographer: rkny

Photographer’s description: Taken in Elsack, Skipton, Yorkshire UK. 2012. My first extended time with the Cannon 50 mm 1.2 L. I was blown away by the Canon 5D with this lens at the time. But looking back at the files, they haven’t aged quite so well when compared with current camera.

Equipment: Canon EOS 5D Mark II + Canon EF 50mm F1.2 L USM

Colors, canal, cloud

Colors Canal Cloud

Photographer: Anders A

Photographer’s description: Mum spoke enthusiastically about the vivid colors of the tulip fields in Holland. I started to wonder what they might look like from above, from a drone. This was in 2015 and drone tech was still very new and far from something everyone had. So, me and my tulip loving friend Ulf drove the 1000 km down to Holland a chilly day in April 2015 and started criss crossing the landscape. And my god, it looked fantastic! This is probably the best shot from the trip, from outside Sassenheim. The canals are used to flood the fields after harvest, to kill off germs and parasites.

Equipment: Sony a7 + Sony FE 35mm F2.8 ZA Carl Zeiss Sonnar T* + HAB Paparazzo heavy lift drone

Woman In Red

Woman In Red

Photographer: dasting

Photographer’s description: Sunday morning on the bluffs of El Matador State Beach in Malibu, CA, while traveling for work. Taken with my Leica M9 and Canon 50mm f1.8 LTM lens circa 1960 or so.

Equipment: Leica M9 + Canon 50mm f1.8 LTM

Hội An Night Market

Hội An Night Market

Photographer: skitraveler

Photographer’s description: On a trip to Vietnam, I spent afternoon and evening in Hội An. I started with a cooking class and then moved onto the night market where the colors are as vibrant as the flavors in Vietnamese cooking. Really liked this row of stalls selling lanterns of all colors.

Equipment: Sony a7R IV + Sony FE 35mm F1.4 GM

Old scary red brick bridge

Old scary red brick bridge

Photographer: Valery Seregin

Photographer’s description: This old bridge was probably useful for pedestrians at one time, but today it is a real challenge. The thing is that its covering is made of oval-shaped stone, so it is easy to stumble and fall. There is nothing to grab onto, there are no railings. Just imagine what it is like to use it in winter when the stones are covered with ice. Climbing onto it is not a problem, the problem is getting down. Dozens of people use it every day. Yes, it is old and beautiful, but it is scary and dangerous at the same time.

Equipment: Fujifilm X20

Kiberg Kitywakes

Kiberg Kitywakes

Photographer: Jon-Sverre

Photographer’s description: Kitywakes (3-toed sea gulls) on the harbor of Kiberg (70 degrees north x 30 degrees east – east of Istanbul!), Varanger, Norway this winter. Occupying fishing nets and smelling of Guano.

Equipment: Nikon Z8 + Nikon Nikkor Z 24-200mm F4-6.3 VR

Rainbow Lorikeet

Rainbow Lorikeet

Photographer: SigmaChrome

Photographer’s description: These beautiful native parakeets are quite common where I live and they are approachable if you are careful and don’t make any sudden moves. This one was feeding on my front lawn.

Equipment: Fujifilm GFX 50R + TTArtisan 90mm F1.25

Candy Factory

Candy Factory

Photographer: GrantsImages

Photographer’s description: I’m not certain what they make at this factory, but I always imagine that it is fruit flavored life savors. Like the rolls we used to get at the 5 & 10 store when we were children.

Equipment: Nikon D800 + Nikkor AF-S 300mm F4E PF ED VR

Good afternoon Mr. Station Master.

Good afternoon Mr Station Master

Photographer: Cambrian Coast

Photographer’s description: Carrog Station is located on the Llangollen to Corwen heritage railway. Here we see the Station Master Platt saying good afternoon to the resident of the station house.

Equipment: Sony a7R IV + Sony Vario-Tessar T* FE 16-35mm F4 ZA OSS

Moonlight Star Trail Over a Wild Tulips Field – Blufi – Sicily

Moonlight Star Trail Over a Wild Tulips Field Blufi Sicily

Photographer: astrodariogiannobile

Photographer’s description: What is happening in Holland on this “day”? Nothing except that…we are not in the daytime and we are not in Holland!!! Strange? absolutely yes. We are in Sicily of course and what you see is a real field of wild tulips growing near the village of Blufi.

Equipment: Canon EOS 6D + Canon EF 8-15mm F4L Fisheye USM

Looking for more?

RGB Hikers in Glacier

We’re already gearing up for our next monthly challenge, but in the meantime, why not check out some of our community challenges? User REHS is hosting a challenge called “Through a door, window or gate,” which is now open for submissions, and DrLex is looking for the best non-bird photo you’ve taken since April 14th. Voting is open for REHS’ Sunrise or Sunset challenge and for DrLex’s bird photos of 2025 challenge.



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Sigma BF sample galleries: out-of-town and out-of-camera

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Sigma BF sample galleries: out-of-town and out-of-camera


When you use DPReview links to buy products, the site may earn a commission.
Shooting with the Sigma BF in London

Photo: Al Power

Editor Richard Butler took the Sigma BF as a travel companion on his recent vacation to the UK. He wrote about the experience of using the camera, but we also wanted to highlight the sample images he shot.

Click here to read Richard’s real-world shooting experience with the Sigma BF

The gallery includes a mixture of out-of-camera JPEGs, shot primarily in the Mono and Rich color modes, along with a handful of images reprocessed from Raw in the camera, with adjustments made to highlight or shadow response.

One photo per day with the Sigma BF

Sample gallery
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In addition to his attempts to shoot one ‘good’ photo per day, Richard also spent a day on a photo walk around London with a friend from his earliest days of digital photography. These shots include more extensive use of the camera’s black-and-white mode, again with some examples re-processed in-camera.

A photo walk in London

Sample gallery
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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 (in conjunction with this review); we do so in good faith, so please don’t abuse it.



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Accessory Roundup: the latest comic book character is… a famous photographer?

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Accessory Roundup: the latest comic book character is… a famous photographer?


Photos: Sissi Lu, PortKeys, Peak Design, Viltrox

Welcome to the accessory roundup! This week, we have a lot to go over, including a graphic novel about a famous photographer, a phone case that’ll survive whatever conditions you find yourself in and a stylish on-camera flash. First, though, let’s look at the deals


Deals of the week

Canon EOS R6 ii sensor view
Photo: Canon

The Canon EOS R6 II is one of our favorite cameras at its price point, and this week it’s on sale for $200 off its MSRP putting it right at $2000.

sony_a7rv_rear
Image: Sony

If you find yourself wanting a bit – okay, a lot – more resolution, Sony’s a7R V is also on sale to the tune of $400 off.

A flash with retro style

Viltrox Vintage Z1 flash on camera
Image:Viltrox

Viltrox’s latest on-camera flash, the Vintage Z1, is designed to fit in with retro-style cameras like the Nikon Zf or Fujifilm X-T series. It has a silver and leatherete finish and its power knob offers a pop of brass-color. Its manual control knob, which gives you access to its seven power levles, also has a bit of retro flaire. It has a single-contact hotshoe interface, giving it wide compatability.

The light comes with a defuser, has a recycle time of 0.2 to 3.5 seconds and can get “up to 10,000 flashes on a full charge,” though that number is based on its minimum power output. However, recharging it shouldn’t take long: plug in a USB-C lead, and it’ll be fully powered within an hour.

Buy at Amazon

Buy at B&H


A graphic novel for photography nerds

Muybridge graphic Novel cover
Image: Drawn and Quarterly

Even if you don’t know the name Eadweard Muybridge, you’re almost certainly familiar with his work. He spent the 1800s photographing some of the grandest places in the American West, before casually helping invent the motion picture with his work The Horse In Motion. Now, his story is enshrined in a graphic novel by Guy Delisle called Muybridge, which the publisher says “brings this historical figure and those around him to life through an uncompromising lens.”

According to an article in The Guardian about Muybridge, the book doesn’t try to turn a complicated, real-life person into a comic book hero. We don’t want to spoil too much if you’re not familiar with his life – or his criminal trial – but this book probably isn’t one to share with younger kids. But if you’re interested in the history of photography, it seems like it’ll be well worth a read.

Buy at Amazon

Buy at Barnes and Noble

Buy at IndieBound


A tougher case

Peak Design Gnar Case mounting to motorcycle
Image: Peak Design

I’ve long been a fan of Peak Design’s Mobile cases, because the SlimLink system lets you securely mount your phone to various camera mounts and tripods, as well as onto bike handles and car dashboards. However, I’m also really tough on phone cases, and the (frankly, beautiful) textile-backed cases haven’t lasted long under my “care.”

Peak Design’s new GNAR case promises an alternative. The company says it has “all the protection, ruggedness, and connect-ability that you could ever want,” and it features a TPU bumper and a bezel to keep your cameras safe. The edge is also knurled to make it easier to grip your phone in less than ideal conditions. Despite its extra thickness and the SlimLink connector, the company says it should still work with Apple’s MagSafe wireless chargers.

The one downside is its limited compatability: it’s currently only available for the iPhone 16 Pro and Pro Max, which is a bummer if you’re not rocking the latest from Apple. However, if you are, the case is already on sale – you can snag it for $35.97, instead of its eventual $59.95 MSRP.

Buy at Peak Design


Keep your film safe

do not x ray bag with film
Image: Sissi Lu

While common wisdom says that 800 ISO film and below can safely go through X-ray machines at the airport, it seems like the new CT scanners that have been popping up may be – to borrow a phrase – unsafe for any speed. Photographer and TikToker Sissi Lu is putting out a new bag that you can put your film in that warns security personel not to send it through the machine in seven different languages. It also comes with a card with a message about the sensitive contents of the bag in 21 additional languages, as well as some cute film-themed stickers.

The bag won’t keep your film safe if a security guard puts it through the machine anyways, either because they refused to do a hand-check or if you forgot to dig it out of your luggage, but it should at least help a bit with language barriers that pop up – assuming you’re lucky enough to get an agent that still knows what film.

Buy at Sissi Lu


Monitor on a budget

Portkeys PT5 III mounted on camera
Image: PortKeys

External monitors that can mount to your camera have always been a great tool for filmmakers and videographers, and over the past few years they’ve been becoming more and more affordable. The Portkeys PT5 III, though, takes it to a new level – it’s only $169, but still includes a 5.4″ screen that with an 800 nit max brightness as well as assistance tools like waveforms, a histogram, focus peaking and False Color. You can also use it to preview what your Log footage will look like once it has a LUT applied.

The PT5 III can take a 4K30P signal via HDMI, though the display only runs at 1080p at 60fps. At that size, though, that’ll be enough for most users. You can run it off a Sony NP-F-style battery, or USB-C, and while it doesn’t include a battery, it does come with a sunshade, full-size HDMI cable, micro-to-full-size HDMI cable and a mount.

Buy at Amazon


In case you missed it

There have been some accessory news this week that warranted dedicated articles here on DPReview, but we’d be remiss not to tell you about them here:

Read last week’s roundup



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