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Sony A7S III review: The best mirrorless camera for
video, and almost everything else
Incredible
low-light performance and every feature you need.
Sony’s
A7S series cameras are famous for their low-light performance and video
capabilities, but it’s been five long years since we’ve seen a
new model. The mirrorless landscape has changed drastically in that time, with
numerous video-capable cameras launching from rivals and Sony
itself.
Now,
the 12-megapixel, $3,500 A7S III is here and appears to be
worth the wait. It’s the first mirrorless camera that can keep up to Sony’s pro
video cameras in terms of 4K video specs, while also gaining important features
like a flip-out display. And it still includes the incredible high-ISO
performance that the A7S lineup is known for.
Sony
A7S III
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Pros
- Outstanding
video and photo quality
- 4K
10-bit 120fps video
- 5-axis
stabilization
- Flip-out
display
- Compact
size
- Category-leading
autofocus
Cons
- Price
- Relatively
low sensor resolution
However,
Canon’s recent models looked impressive at first only to have some
annoying issues, especially around the area of overheating, when I got to test
them in person. To see if the A7S III could avoid those snags, I took it to
Paris and around the Loire valley before the France lockdown took effect --
here’s what I found out
Body
and handling
Gallery: Sony A7S III full-frame
mirrorless camera review | 33 Photos
Steve Dent/Engadget
The A7S III is
nearly identical to the A7R IV, which is a good thing because the A7R IV is
Sony’s best handling camera yet. At 699 grams, it’s surprisingly light
considering all the tech packed inside. It also feels natural to hold and use,
thanks to the nicely contoured grip and assortment of logically placed manual
controls.
Those
include shooting control dials for shutter and aperture, a joystick, control
wheel, mode dial, exposure compensation dial and multiple buttons. I wish the
mode dial had a push-to-lock button, so you don’t have to awkwardly hold the
button while turning the dial and I also slightly prefer the layout on
Panasonic’s S5, as it has dedicated dials and a button for shooting and AF
modes. Still, the handling on this camera is among the best.
Sony
has finally, finally fixed its awful menu system and now uses cascading folders
like Panasonic’s latest cameras. Those make it much easier to find settings and
remember where you are, though a few things like the log functions are still a
bit hard to find.
Better
still, the main and quick menus can be fully operated using the 3-inch
touchscreen. With all of Sony’s previous cameras, the touch display was only
useful for setting touch focus. Now, you can adjust things without any buttons,
which is particularly useful when you’re filming with the display toward
yourself.
It
also fully articulates, which is really a must these days for a video-centric
camera. It’s now feasible to use this camera for vlogging or solo
shooting.
Steve Dent/Engadget
Since
Sony builds the OLED electronic viewfinders used in most cameras, it’s not
shocking that the A7S III is the first to get its new 9.44-million dot EVF. It
offers a huge 63 percent increase in resolution over the A7R IV, though frankly
I didn’t notice much difference in sharpness. (Weirdly, footage seems to be
sharper when played back than when shooting.) It’s a bit brighter though, which
is always welcome.
Another
first for Sony is the dual, dual card slots. They not only support
two UHS II SD cards, but also Sony’s new fast but tiny CFexpress type A cards.
For most types of shooting you can stick to cheaper SD, but you’ll need
CFexpress in certain situations -- more on that shortly.
The
battery is the same as the one in the A7R IV, and I could shoot video for around
three hours on a charge. Plus, it can handle up to 600 photos, according to
CIPA’s standards. In other words, you don’t have to worry much about the
battery dying mid-shoot.
Finally,
it has all the ports you need on a video-centric camera, including USB-C for
both charging and data transfers, along with microphone and headphone ports. If
you need more than two channels of audio, you can use Sony’s hot shoe-mounted
XLR-K3M audio adapter. Topping off the good news, it has a full-sized HDMI port
that’s far less likely to cause problems if you use an external recorder -- and
the camera even comes with a cable protector.
Video
Steve Dent/Engadget
That brings us to this camera’s forte, video. Almost
everything that I ever complained about past Sony mirrorless cameras has been
addressed. You can shoot 4K at up to 120 fps, more than any other hybrid
mirrorless camera except Canon’s EOS R5, giving you some crazy creative
options. If you shoot 1080p, the A7S III delivers the best HD quality of any
Sony mirrorless camera, because it can supersample the entire sensor. It also
supports 240 fps for super slow-mo effects.
If
you want to give your computer a break, you can use the new “S&Q” (slow and
quick) motion mode to capture at 60 fps or 120 fps with playback limited to 24
fps with no audio. The advantage of that is that you get the same smooth
slo-mo, but the footage is a lot easier to edit afterwards. Just be aware
that data rates can hit 1200 Mbps when you’re recording 4K 120 fps using the
S&Q settings, so you’ll need CFexpress cards for that.
What’s
more, it supports 10-bit capture in all 4K modes. Combined with Sony’s log and
HLG modes, it delivers high dynamic range video perfect for HDR or
post-production work. Just be mindful that high frame-rate 4K 10-bit video at
maximum quality requires a fast and costly CFexpress card -- with 80GB and
160GB cards costing $200 and $400, respectively.
You can even capture 4K 60 fps RAW footage to an Atomos Ninja 7 recorder, though the exposure is baked into the image, giving you fewer options in post and negating some of the advantages of RAW video. That might change with a future firmware update, however.
Image Credit: Steve Dent/Engadget
What
about editing these files? Sony has a new choice here with its All-I (XAVC S-I)
compression for 4K or HD at up to 60 fps, with every frame being recorded
separately. The 4K files are large and require a CFexpress card at 60 fps,
because data rates average 600 Mbps and can hit up to 1200 Mbps. However, I was
able to edit them directly with no transcoding in Davinci Resolve on an NVIDIA
RTX 2070 laptop.
If
you’d prefer smaller file sizes with no loss of quality, you can shoot XAVC S
4K or XAVC HS 4K files, but your computer will grind if you try to edit them.
As such, you’ll likely need to convert them to ProRes or another more editable
format.
The
A7S III doesn’t capture 8K or even 6K like Canon’s EOS R5 or the BMPCC 6K, but
those resolutions are still largely gimmicky. And while it can’t supersample 4K
like the A7 III (because it has half the sensor resolution), its 4K video is
still extremely sharp. That’s a nice bonus considering the extra low-light
capability and reduced rolling shutter effect.
Canon’s
colors might be a bit warmer and more human, but Sony’s hues are arguably more
accurate. That makes it easier to adjust your images in post, especially with
the very high dynamic range.
The
in-body stabilization is highly effective for video, especially with electronic
stabilization, which adds a small crop. As usual, it can’t replace a gimbal,
but it’s effective for static shooting or smooth panning. And as I mentioned
earlier, Sony has sped up the sensor readout speeds, so rolling shutter or
jello is now very well controlled -- a big change over past Sony mirrorless
cameras.
Steve Dent/Engadget
Video autofocus now beats Canon’s vaunted Dual Pixel AF
technology, thanks to the sheer speed and AI smarts in Sony’s newest camera. It
accurately tracks subjects and the face and eye detection is uncanny, though
not completely infallible. Sony also gives you full control over the AF speed
and smoothness when changing focus between subjects.
I
think the A7S III is also the best vlogging camera on the market, period,
thanks to the flip-out screen, mic input, stabilization, high-quality video and
eye autofocus. It’s also small and light enough to carry around for long
stretches.
Its
superpower, though, is low-light shooting. Much like nightsight mode on
smartphones, this is stupidly useful in so many situations. I found I could get
usable shots with manageable noise at up to ISO 51,200 if I exposed correctly
or allowed for some underexposure. Beyond that, the image is too noisy, so it
would only be good for emergency use.
Those
low-light powers are very useful for film school students or even pro
filmmakers, letting them shoot indoors and in other circumstances using
practical or natural light. That creates a cinéma verité look
that’s hard to replicate with other cameras.
Photography
and image quality
Gallery: Sony A7S III sample images
and video frame grabs | 31 Photos
Steve
Dent/Engadget
For photos, don’t be quick to
poo-poo the 12.1-megapixel sensor. It limits how much you can blow up shots,
but the A7S III’s prodigious low-light and fast autofocus powers make it better
for other things. For what I shoot, largely product and street photos, the
speed and low-light capabilities outweigh the lack of resolution.
With
just 12 megapixels to process, the autofocus for photos is fast and responsive.
It stays locked on, no matter how fast your subject moves, giving you sharp
shots for sports, wildlife or lively parties. It works equally well in dim and
bright light, putting every other camera to shame in that regard.
Sony’s
subject tracking, along with the face and eye-tracking, already leads the
industry -- and the A7S III takes it up another notch. It follows your
subjects, whether they be human or animal, with otherworldly speed and
accuracy. That translates to sharp portraits or candid shots nearly every
time.
The A7S III can shoot at up to 10 frames per second with continuous autofocus, or 20 fps with the silent electronic shutter. What that spec doesn’t say is how great the mechanical shutter feels and sounds.
Steve Dent/Engadget
Another
feature that makes blurry shots less likely is the in-body stabilization. Sony
claims 5.5 stops of shake reduction, which is less than rivals like the Canon
R6 and Panasonic S5. Given the much higher ISO range and lower noise levels,
though, it’s more than sufficient.
As
with video, low-light photography is unmatched, letting you capture shots with
very manageable noise at borderline ridiculous ISO levels. Shooting at ISO
16,000 or 25,600 in a dim lit train station, I could pull detail out of shadows
with minimal noise.
JPEGs
are natural with just the right amount of sharpening, while RAW photos let you
dial down blown-out highlights or crank up shadows. Sure, it would be nice to
have higher resolution photos, but the A7S III is more versatile and, dare I
say it, more fun to use. For most videographers who occasionally shoot photos,
I think this camera will do nicely.
Wrap-up
Steve Dent/Engadget
I can’t find many faults with this
camera. Sony has addressed nearly every complaint I’ve ever had about previous
A7-series cameras, but it didn’t just stop there. It also improved autofocus
and other features that I already liked, keeping the A7S III far ahead of
rivals.
Its
limitations are down to the high $3,500 price tag and low-resolution sensor,
which rules out the A7S III for landscape and other types of high-detail
photography. If you need that, get Sony’s similarly priced A7R IV with a
category-leading 61 megapixels.
If budget is an issue and you need an all-around hybrid camera, check out the Canon R6, Panasonic S5 or Sony’s own A7 III, all between $2,000 and $2,500. However, if you’re into video or low-light photography and have the budget, I’d highly recommend the A7S III. Feature for feature, it's simply the best camera I’ve ever tested.
Source:
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