Sony a7S III Review

Pinterest LinkedIn Tumblr

The Sony A7S III is finally here, and boy does it deliver. With huge improvements to handling and connectivity, a pin-sharp viewfinder, and, of course, hugely impressive low-light performance across both video and stills, it’s the finest hybrid video camera you can buy.

The fully articulating screen is one of the many other stars of the A7S III show. Sony teased this on the Sony ZV-1, but now it’s finally made its way to an A7-series camera. Perhaps an even bigger deal for frustrated Sony fans is that it’s finally opted for a full touch UI, making interaction with the camera much more intuitive.

Being a Sony digital camera, the A7S III also delivers excellent, customizable autofocus, with 759 phase-detection AF points and eye-tracking across animals and humans, which Sony claims to be 30% faster than on The 7S II. This is combined with in-body image stabilization (IBIS) and Active stabilization, which marries optical and electronic systems with a small crop-factor.

The 12.1MP sensor resolution means the A7S III can’t record 6K, let alone 8K, video, instantly putting it behind much of the competition in terms of outright resolution. What it can do, though, is the record for a very long time, and in very low light. That’s the key reason you’ll be picking up an A7S III, which wiped the floor with the admittedly (much) cheaper Blackmagic Pocket Cinema Camera 4K in our tests.

With images captured at sensitivities between ISO 2000-4000 looking like they were shot nearer 200-400, the A7S III is a liberating camera to use, and, naturally, you can boost the ISO much higher. Even when we set the ISO in excess of 40,000, it still produced usable footage for certain types of video.

Sony has also improved focus speeds on the A7S III, and it partly puts this down to the sensor sensitivity performance, which enables the camera to identify subjects in lower light than sensors with inferior sensitivity.

This is more than just a video camera though, and stills captured indoors look stunning, with simple incidental shots in dimly lit environments exhibiting an ambience and clarity usually missing from out-of-the-camera photos.

When it comes to power, the new Z battery delivers what Sony claims to be a 60% performance improvement over the Sony A7S II‘s NP-FW50, which translates to up to 95 minutes of video capture, on paper. While we had a fair amount of variability in our device’s battery life, it comfortably captured 4K video for more than 75 minutes inside our tests, which is great going compared to much of the competition.

The sticking point with the A7S III is always going to be price – it’s a hefty investment, especially if you want to couple it with decent glass and fast storage – but the camera itself is the best in its class.

Key features

One of the big new changes from the A7S II is the arrival of a fully articulating screen. Sony teased the feature on the Sony ZV-1, but now it’s finally made its way onto an A7-series camera, and not a moment too soon.

Fortunately, the breaks from tradition don’t stop there. Perhaps a bigger deal for long-time Sony devotees, and indeed critics, is that the company has finally opted for a full touch UI, and it works beautifully.

These design and ergonomic changes are coupled with other impressive flourishes as you work your way around the body of the camera, from the full-sized HDMI port to the inclusion of a dedicated record button on the top plate. It’s hard to find anything to complain about when it comes to the refreshed style of the A7S III – it really does feel like a compromise-free zone for video – but we’d expect nothing less at this price.

The A7S III features a 12.1MP resolution spread across a brand-new full-frame sensor. Sony’s decision to keep the resolution low is single-minded. With competition from Canon climbing up to 45MP and packing 8K movie capture, the A7S III resolutely sticks with big pixels and a 4K cap. Its task is simple – to be the best 4K video camera it can be, excelling with regards to high-ISO, low-light catch.

Being a Sony camera, the The7S III also delivers an excellent, customizable autofocus system, with 759 phase-detection AF points and eye-tracking across animals and humans that claims to be 30% faster than on its predecessor. This combines nicely with optical and electronic stabilization, with the latter coming with a small crop factor.

There are plenty of other highlights: the A7S III can receive an analogue and digital input from its hot-shoe mount, capture 16-bit raw over HDMI when recording at 4K/60p for the first time, and it includes a 9.44MP viewfinder – proving that photographers haven’t been entirely forgotten about.


Model number: ILCE-7SM3
 12.1MP full frame BSI CMOS full-frame sensor
Image processor: Bionz XR
AF points: 759 on-sensor phase detection, 425 contrast detection
ISO range: 80-102,400 (expandable 40-409,600)
Stabilisation: 5-axis
Metering modes: Centre-weighted average, highlight-weighted, multiple, spot
Video: 4K video up to 120p, FHD to 240p, 10-bit 4:2:2 internal capture in H.265/ All-I H.264
Viewfinder: Electronic OLED, 100&% coverage, 9,437K dots
Memory card: Twin CFexpress Type A or SD/SDHC/SDXC card slots
LCD: Fully articulating 3-inch touchscreen LED, 1440K dots
Max burst: 10fps, up to 1000 raw frames
Connectivity: Wi-Fi, Bluetooth
Size: 128.9 x 96.0 x 69.7mm
Weight: 614g (body only)

Build and handling

The Sony A7S III is a relatively compact but solid bit of kit. With a similar body construction to the A7S II, you’d be forgiven for missing just how much of an overhaul this is going on first impressions.

For starters, one of the custom buttons above the grip has been swapped out for a large record button, setting the scene for this camera’s strong emphasis on video shooting. There’s still a control wheel at the top of the grip, and this is joined by an on-off switch, a C2 button, and dials for both mode and exposure (both of which can be locked).

Despite the A7S III not having an official weather-sealing rating, Sony has assured us that it can handle drizzle, and all the ports are under rubberized covers, on the left-hand side of the camera when it’s held lens-forward.

These ports include a full-sized HDMI port – a real boon for videographers – plus a USB-C port and micro USB port (it’s an interesting choice on Sony’s part to feature both), not to mention a headphone jack and 3.5mm microphone jack. If you’re longing for XLR audio-in, you can opt for an XLR-K3M hot-shoe accessory from Sony, for up to four audio inputs. On the right-hand side are the memory card slots and an NFC point.

Buttons and dials are plentiful on the back of the camera, dotted around the screen like a candy trail. Starting from the top-left, there’s a C3 and menu button, with the latter firing up the welcome touch UI. Venturing past the eye-piece, the C1 switch, AF-on and AEL buttons line up neatly. Below, a handy four-way joystick makes navigating menus in traditional Canon-style a breeze, while an Fn key, four-way jog-dial, select, gallery and trash button round things off.

And then there’s that screen – articulating beautifully, angling around and up like a dream. With a 1.44 million-dot resolution, it’s sharp enough, and we found it viewable outdoors in all but the brightest environments.

The touch UI also deserves a special mention here. With a logical hierarchy of menus, it’s easy to operate with a finger or the four-way jog-dial. We’re still scratching our heads as to why Sony didn’t introduce this sooner, but the fact remains that it’s a very welcome inclusion – although one thing we don’t understand is why the display isn’t in the 16:9 aspect ratio given that the A7S III is a video-focused camera.

Putting a video to the side for a second, the A7S III’s bright, sharp viewfinder is really a photographer’s dream, with crisp clarity, excellent coverage and ample brightness. And whether you’re shooting stills or video, the Sony A7S III handles well because it offers so many controls and top-end specs.

If you’re a seasoned Canon user, the grip might feel a touch claw-clasp inducing at first, though the The7S III nevertheless pulls through a fair amount of comfort and weight to counterbalance most lenses. The dials are all in the right places, and there are no less than three ways to navigate menus, so while this is a seriously comprehensive camera, the learning curve is anything but steep, whatever system you’re coming from.


One of the first things you’ll notice about the Sony A7S III is how well it performs in low light. Ramping up the ISO is not a stressful experience – in fact, it’s incredibly gratifying, with the camera able to handle high sensitivity mind-bogglingly well.

The A7S III’s low-light capabilities make sense. Sony has created a brand-new 12.1MP sensor which has huge pixels spread across a full-frame, 35mm surface area. On paper, these specs aren’t fresh, but with twice the readout speeds of the A7S II’s sensor, a back-illuminated structure that’s in a position to ingest more lighting, and a new Bionz XR processor powering points along, the low-light boost isn’t a surprise.

That sensor resolution means the A7S III can’t record 6K video, let alone 8K, instantly putting it behind the Canon EOS R5 on that front. What it can do, however, is the record for a very long time. As with the Sony ZV-1, we had no issues recording for in excess of 30 minutes, with the only limiting factors being the card capacity, battery life and heat – and the fact that we never experienced any overheating warnings or problems on the pre-production A7S III we tested bodes well for the final retail unit.

Autofocus for photo and video benefits from 759 phase-detection focus points, not to mention advanced eye-tracking that’s 30% faster than on previous Sony cameras.

Is it as good as Canon’s Dual Pixel AF? Well, it’s different. For video, specifically, Sony gives you beautifully granular control over your concentrate speeds. You really can get that pan-focus effect with auto focus by touching the display when you slow down the focus speed, and it works very well, whether you’re focusing on a flower, an apple, a cat or indeed a human.

Sony partly puts this improved focusing down to the sensor’s sensitivity performance, enabling the A7S III to identify subjects in lower light than cameras with inferior sensitivity.

When it comes to power, the new Z battery delivers what Sony claims to be a 60% improvement over the performance of the A7S II’s NP-FW50 – up to 95 minutes of video capture, on paper.

While we experienced a fair amount of variability in our review unit’s battery existence, it comfortably captured 4K movie for more than an hour in every test we conducted, which is excellent compared to much of the competition. That said, we’ll have to wait until we get a final retail version to conclusively assess battery performance.

In addition, thanks to the inclusion of a USB-C port, the A7S III takes advantage of fast charging tech, powering up to four times quicker than via an old-school micro USB connector. What’s also fantastic is that Sony doesn’t impose its shiny new, ultra-fast, ultra-expensive memory card format on you – but it does support it nonetheless.

Priced comparably to CFast cards, these CFexpress cards (which deliver 800MB/s read and 700MB/s write speeds) are beauties. Thanks to the A7S III’s dual-format card slots, though, you can also use SDXC V60 cards. That means two memory cards at any given time in the camera, and you can mix and match depending on what you have. You only really need the ultra-high-speed CFExpress cards for Sony’s S&Q recording format at 4K resolution.

With other Sony hangovers missing from the A7S III – buffer issues, clunky menus and the lack of an articulating screen – this camera makes us, as camera enthusiasts and professionals, feel heard. Sony has finally taken note and shaken things up.

This sigh of relief is compounded by new features and enhancements that make day-to-day shooting and video capture a seriously future-proofed treat – for example, there’s support for the new HEIF photo format, H.265 video capture, and clean 16-bit raw output at 4K 60fps.

While the sticking point with the A7S III is always going to be price – it’s undoubtedly a big investment before you even start shooting if you want to pair it with decent glass and fast storage – the camera itself doesn’t leave many itches unscratched.

Check Out: Best Lenses For Sony A7S III 


Sony hasn’t just improved one or two aspects of its A7S series; with the new A7S III, it’s made an across-the-board set of upgrades that result in a camera that’s the best of its kind. It handles beautifully for video thanks to its articulating screen and touches display, while a full-sized HDMI port and excellent IBIS head the list of other treats. It’s significantly dearer than the A7S II was when it launched, but if you’re a videographer in need of big physical pixels and outstanding low-light performance, this is as good as it gets.

Write A Comment