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Sony A77 II vs A7S III

The Sony Alpha SLT-A77 II and the Sony Alpha 7S III are two digital cameras that were officially introduced, respectively, in May 2014 and July 2020. The A77 II is a DSLR, while the A7S III is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (A77 II) and a full frame (A7S III) sensor. The A77 II has a resolution of 24 megapixels, whereas the A7S III provides 12 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Sony A77 II
versus
Sony A7S III
Sony A77 II   Sony A7S III
Digital single lens reflex Mirrorless system camera
Sony A mount lenses Sony E mount lenses
24 MP – APS-C sensor 12 MP – Full Frame sensor
1080/60p Video 4K/120p Video
ISO 100-25,600 (50 - 51,200) ISO 80-102,400 (40 - 409,600)
Electronic viewfinder (2359k dots) Electronic viewfinder (9440k dots)
3.0" LCD – 1229k dots 3.0" LCD – 1440k dots
Fully flexible screen (no touchscreen) Swivel touchscreen
12 shutter flaps per second 10 shutter flaps per second
In-body stabilizationIn-body stabilization
Weathersealed bodyWeathersealed body
480 shots per battery charge600 shots per battery charge
143 x 104 x 81 mm, 647 g 127 x 97 x 81 mm, 699 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Sony Alpha SLT-A77 II and the Sony Alpha 7S III? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.

Body comparison

An illustration of the physical size and weight of the Sony A77 II and the Sony A7S III is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth dimensions are rounded to the nearest millimeter.

Size Sony A77 II vs Sony A7S III
Compare A77 II versus A7S III top
Comparison A77 II or A7S III rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7S III is notably smaller (17 percent) than the Sony A77 II. However, the A7S III is markedly heavier (8 percent) than the A77 II. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.

The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

Concerning battery life, the A77 II gets 480 shots out of its NP-FM500H battery, while the A7S III can take 600 images on a single charge of its NP-FZ100 power pack. The power pack in the A7S III can be charged via the USB port, which can be very convenient when travelling.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

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Body Specifications
    Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Sony A77 II 143 mm 104 mm 81 mm 647 g 480 Y May 2014 1,199ebay.com
2.
 
Sony A7S III 127 mm 97 mm 81 mm 699 g 600 Y Jul 2020 3,499 amazon.com
3.
 
Canon G3 X 123 mm 77 mm 105 mm 733 g 300 Y Jun 2015 999 amazon.com
4.
 
Nikon D7200 136 mm 107 mm 76 mm 765 g 1110 Y Mar 2015 1,199ebay.com
5.
 
Panasonic GX8 133 mm 78 mm 63 mm 487 g 330 Y Jul 2015 1,199ebay.com
6.
 
Sony A1 129 mm 97 mm 81 mm 737 g 530 Y Jan 2021 6,499 amazon.com
7.
 
Sony A7 IV 131 mm 96 mm 80 mm 659 g 580 Y Oct 2021 2,499 amazon.com
8.
 
Sony A7R IV 129 mm 96 mm 78 mm 665 g 670 Y Jul 2019 3,499 amazon.com
9.
 
Sony A9 127 mm 96 mm 63 mm 673 g 650 Y Apr 2017 4,499ebay.com
10.
 
Sony A6500 120 mm 67 mm 53 mm 453 g 350 Y Oct 2016 1,399ebay.com
11.
 
Sony A7R II 127 mm 96 mm 60 mm 625 g 290 Y Jun 2015 3,199ebay.com
12.
 
Sony A7S II 127 mm 96 mm 60 mm 627 g 370 Y Sep 2015 2,999ebay.com
13.
 
Sony A68 143 mm 104 mm 81 mm 610 g 540 n Nov 2015 699ebay.com
14.
 
Sony A7 II 127 mm 96 mm 60 mm 599 g 350 Y Nov 2014 1,999ebay.com
15.
 
Sony A77 143 mm 104 mm 81 mm 732 g 470 Y Aug 2011 1,399ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.

Any camera decision will obviously take relative prices into account. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The A77 II was launched at a markedly lower price (by 66 percent) than the A7S III, which puts it into a different market segment. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

Sensor comparison

The size of the imaging sensor is a crucial determinant of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Sony A77 II features an APS-C sensor and the Sony A7S III a full frame sensor. The sensor area in the A7S III is 131 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Technology-wise, the A7S III uses a more advanced image processing engine (BIONZ XR) than the A77 II (BIONZ X), with benefits for noise reduction, color accuracy, and processing speed.

Sony A77 II and Sony A7S III sensor measures

Despite having a smaller sensor, the Sony A77 II offers a higher resolution of 24 megapixels, compared with 12 MP of the Sony A7S III. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.91μm versus 8.40μm for the A7S III). Moreover, it should be noted that the A7S III is much more recent (by 6 years and 2 months) than the A77 II, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units.

The resolution advantage of the Sony A77 II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A77 II for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 x 33.9 cm. The corresponding values for the Sony A7S III are 21.2 x 14.2 inches or 53.8 x 36 cm for good quality, 17 x 11.3 inches or 43.1 x 28.8 cm for very good quality, and 14.1 x 9.4 inches or 35.9 x 24 cm for excellent quality prints.

The A7S III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Sony Alpha SLT-A77 II has a native sensitivity range from ISO 100 to ISO 25600, which can be extended to ISO 50-51200. The corresponding ISO settings for the Sony Alpha 7S III are ISO 80 to ISO 102400, with the possibility to increase the ISO range to 40-409600.

In terms of underlying technology, the A77 II is build around a CMOS sensor, while the A7S III uses a BSI-CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

A77 II versus A7S III MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

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Sensor Characteristics
    Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Sony A77 II APS-C 24.0 6000 40001080/60p23.512.7144277
2.
 
Sony A7S III Full Frame 12.0 4240 28324K/120p23.713.9252086
3.
 
Canon G3 X 1-inch 20.0 5472 36481080/60p21.412.352163
4.
 
Nikon D7200 APS-C 24.0 6000 40001080/60p24.514.6133387
5.
 
Panasonic GX8 Four Thirds 20.2 5184 38884K/30p23.512.680675
6.
 
Sony A1 Full Frame 49.8 8640 57608k/30p25.914.5316398
7.
 
Sony A7 IV Full Frame 32.7 7008 46724K/60p25.414.7337997
8.
 
Sony A7R IV Full Frame 60.2 9504 63364K/30p26.014.8334499
9.
 
Sony A9 Full Frame 24.0 6000 40004K/30p24.913.3351792
10.
 
Sony A6500 APS-C 24.0 6000 40004K/30p24.513.7140585
11.
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
12.
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
13.
 
Sony A68 APS-C 24.0 6000 40001080/60i24.113.570179
14.
 
Sony A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990
15.
 
Sony A77 APS-C 24.0 6000 40001080/60p24.013.280178
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the A7S III provides a better video resolution than the A77 II. It can shoot movie footage at 4K/120p, while the A77 II is limited to 1080/60p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. The two cameras under review are similar with respect to both having an electronic viewfinder. However, the one in the A7S III offers a substantially higher resolution than the one in the A77 II (9440k vs 2359k dots). The following table reports on some other key feature differences and similarities of the Sony A77 II, the Sony A7S III, and comparable cameras.

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Core Features
    Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Sony A77 II2359 Y3.0 / 1229 full-flex n 1/8000s 12.0/s Y Y
2.
 
Sony A7S III9440 n3.0 / 1440 swivel Y 1/8000s 10.0/s n Y
3.
 
Canon G3 Xoptional n3.2 / 1620 tilting Y 1/2000s 5.9/s Y Y
4.
 
Nikon D7200optical Y3.2 / 1229 fixed n 1/8000s 6.0/s Y n
5.
 
Panasonic GX82360 n3.0 / 1040 swivel Y 1/8000s 10.0/s n Y
6.
 
Sony A19437 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
7.
 
Sony A7 IV3686 n3.0 / 1037 swivel Y 1/8000s 10.0/s n Y
8.
 
Sony A7R IV5760 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
9.
 
Sony A93686 n3.0 / 1440 tilting Y 1/8000s 20.0/s n Y
10.
 
Sony A65002359 n3.0 / 922 tilting Y 1/4000s 11.0/s Y Y
11.
 
Sony A7R II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
12.
 
Sony A7S II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
13.
 
Sony A681440 Y2.7 / 460 tilting n 1/4000s 8.0/s Y Y
14.
 
Sony A7 II2400 n3.0 / 1230 tilting n 1/8000s 5.0/s n Y
15.
 
Sony A772359 Y3.0 / 921 full-flex n 1/8000s 12.0/s Y Y
Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One difference between the cameras concerns the presence of an on-board flash. The A77 II has one, while the A7S III does not. While the built-in flash of the A77 II is not very powerful, it can at times be useful as a fill-in light.

Both cameras have an articulated rear screen that can be turned to be front-facing. This feature will be particularly appreciated by vloggers and photographers who are interested in taking selfies.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the A7S III is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The A77 II writes its imaging data to SDXC or Memory Stick PRO Duo cards, while the A7S III uses CFexpress (type A) or SDXC cards. The A7S III features dual card slots, which can be very useful in case a memory card fails. In contrast, the A77 II only has one slot. The A7S III supports UHS-II cards (on both slots), while the A77 II can use UHS-I cards.

Connectivity comparison

For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Sony Alpha SLT-A77 II and Sony Alpha 7S III and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
    Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Sony A77 IIYstereo / monoY-mini2.0YY-
2.
 
Sony A7S IIIYstereo / monoYYfull3.2Y-Y
3.
 
Canon G3 XYstereo / monoYYmini2.0YY-
4.
 
Nikon D7200Ystereo / monoYYmini2.0YY-
5.
 
Panasonic GX8Ystereo / monoY-micro2.0YY-
6.
 
Sony A1Ystereo / monoYYfull3.2Y-Y
7.
 
Sony A7 IVYstereo / monoYYfull3.2Y-Y
8.
 
Sony A7R IVYstereo / monoYYmicro3.1YYY
9.
 
Sony A9Ystereo / monoYYmicro2.0YYY
10.
 
Sony A6500Ystereo / monoY-micro2.0YY-
11.
 
Sony A7R IIYstereo / monoYYmicro2.0YY-
12.
 
Sony A7S IIYstereo / monoYYmicro2.0YY-
13.
 
Sony A68Ystereo / monoY-micro2.0---
14.
 
Sony A7 IIYstereo / monoYYmicro2.0YY-
15.
 
Sony A77Ystereo / monoY-mini2.0---

It is notable that the A7S III has a headphone jack, which makes it possible to attach external headphones and monitor the quality of sound during the recording process. The A77 II lacks such a headphone port.

Studio photographers will appreciate that the Sony A77 II (unlike the A7S III) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

The A7S III is a recent model that features in the current product line-up of Sony. In contrast, the A77 II has been discontinued (but can be found pre-owned on ebay). There has not been a direct replacement model for the A77 II from Sony. Further information on the features and operation of the A77 II and A7S III can be found, respectively, in the Sony A77 II Manual (free pdf) or the online Sony A7S III Manual.

Review summary

So what is the bottom line? Is there a clear favorite between the Sony A77 II and the Sony A7S III? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.


Reasons to prefer the Sony Alpha SLT-A77 II:

  • More detail: Offers more megapixels (24 vs 12MP) with a 41% higher linear resolution.
  • Easier setting verification: Features an LCD display on top to control shooting parameters.
  • Faster burst: Shoots at higher frequency (12 vs 10 flaps/sec) to capture the decisive moment.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • More affordable: Was introduced into a lower priced category (66 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in May 2014).


Arguments in favor of the Sony Alpha 7S III:

  • Better image quality: Is equipped with a larger and more technologically advanced sensor.
  • Richer colors: The sensor size advantage translates into images with better, more accurate colors.
  • More dynamic range: Larger sensor captures a wider spectrum of light and dark details.
  • Better low-light sensitivity: Larger sensor produces good images even in poorly lit environments.
  • Better jpgs: Has a more modern image processing engine (BIONZ XR vs BIONZ X).
  • Better video: Provides higher definition movie capture (4K/120p vs 1080/60p).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • More detailed viewfinder: Has higher resolution electronic viewfinder (9440k vs 2359k dots).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.91x vs 0.73x).
  • More detailed LCD: Has a higher resolution rear screen (1440k vs 1229k dots).
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More compact: Is smaller (127x97mm vs 143x104mm) and will fit more readily into a bag.
  • Longer lasting: Gets more shots (600 versus 480) out of a single battery charge.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • Faster data transfer: Supports a more advanced USB protocol (3.2 vs 2.0).
  • More solid recording: Has a full-sized HDMI port for a sturdy connection to an external recorder.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
  • More modern: Reflects 6 years and 2 months of technical progress since the A77 II launch.

If the count of relative strengths (bullet points above) is taken as a measure, the A7S III is the clear winner of the contest (23 : 8 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding on a new camera. A professional wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

A77 II 08:23 A7S III

How about other alternatives? Do the specifications of the Sony A77 II and the Sony A7S III place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it says little about, for example, the shooting experience and imaging performance of the A77 II and the A7S III in practical situations. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.

Expert reviews

This is why expert reviews are important. The adjacent summary-table relays the overall verdicts of several of the most popular camera review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

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Expert Camera Reviews
     Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Sony A77 II4/5....80/1004.5/55/5 May 2014 1,199ebay.com
2.
 
Sony A7S III..+ +5/591/1004.5/55/5 Jul 2020 3,499 amazon.com
3.
 
Canon G3 X3.5/5+....4.5/54/5 Jun 2015 999 amazon.com
4.
 
Nikon D72004/5+ +..84/1004.5/54.5/5 Mar 2015 1,199ebay.com
5.
 
Panasonic GX85/5+..82/1004.5/54.5/5 Jul 2015 1,199ebay.com
6.
 
Sony A15/5o4.5/593/1004.5/55/5 Jan 2021 6,499 amazon.com
7.
 
Sony A7 IV5/5+ +4.5/589/1004.5/54.5/5 Oct 2021 2,499 amazon.com
8.
 
Sony A7R IV5/5+4.5/591/1004.5/55/5 Jul 2019 3,499 amazon.com
9.
 
Sony A95/5+ +4.8/589/1005/55/5 Apr 2017 4,499ebay.com
10.
 
Sony A65005/5+ +3.5/585/1004.5/54.5/5 Oct 2016 1,399ebay.com
11.
 
Sony A7R II5/5+ +5/590/1005/55/5 Jun 2015 3,199ebay.com
12.
 
Sony A7S II5/5+....4.5/55/5 Sep 2015 2,999ebay.com
13.
 
Sony A683/5......4/54/5 Nov 2015 699ebay.com
14.
 
Sony A7 II5/5+4/582/1004.5/55/5 Nov 2014 1,999ebay.com
15.
 
Sony A775/591/100..81/100..5/5 Aug 2011 1,399ebay.com
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

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Other camera comparisons

Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications: Sony A77 II vs Sony A7S III

    Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.

    Camera Specifications
    Camera Model Sony A77 II Sony A7S III
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Sony A mount lenses Sony E mount lenses
    Launch Date May 2014 July 2020
    Launch Price USD 1,199 USD 3,499
    Sensor Specs Sony A77 II Sony A7S III
    Sensor Technology CMOS BSI-CMOS
    Sensor Format APS-C Sensor Full Frame Sensor
    Sensor Size 23.5 x 15.6 mm 35.6 x 23.8 mm
    Sensor Area 366.6 mm2 847.28 mm2
    Sensor Diagonal 28.2 mm 42.8 mm
    Crop Factor 1.5x 1.0x
    Sensor Resolution 24 Megapixels 12 Megapixels
    Image Resolution 6000 x 4000 pixels 4240 x 2832 pixels
    Pixel Pitch 3.91 μm 8.40 μm
    Pixel Density 6.55 MP/cm2 1.42 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 1080/60p Video 4K/120p Video
    ISO Setting 100 - 25,600 ISO 80 - 102,400 ISO
    ISO Boost 50 - 51,200 ISO 40 - 409,600 ISO
    Image Processor BIONZ X BIONZ XR
    DXO Sensor Quality (score) .. 86
    DXO Color Depth (bits) .. 23.7
    DXO Dynamic Range (EV) .. 13.9
    DXO Low Light (ISO) .. 2520
    Screen Specs Sony A77 II Sony A7S III
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.73x 0.91x
    Viewfinder Resolution 2359k dots 9440k dots
    Top-Level Screen Control Panel no Top Display
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1229k dots 1440k dots
    LCD Attachment Fully flexible screen Swivel screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Sony A77 II Sony A7S III
    Focus System Phase-detect AF On-Sensor Phase-detect
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/8000s
    Continuous Shooting 12 shutter flaps/s 10 shutter flaps/s
    Shutter Life Expectancy150 000 actuations200 000 actuations
    Electronic Shutterno E-ShutterYES
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium MS or SDXC cards CFexA or SDXC cards
    Single or Dual Card Slots Single card slot Dual card slots
    UHS card support UHS-I Dual UHS-II
    Connectivity Specs Sony A77 II Sony A7S III
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 2.0 USB 3.2
    HDMI Port mini HDMI full HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket no Headphone port Headphone port
    Wifi Support Wifi built-in Wifi built-in
    Near-Field Communication NFC built-in no NFC
    Bluetooth Support no Bluetooth Bluetooth built-in
    Body Specs Sony A77 II Sony A7S III
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type NP-FM500H NP-FZ100
    Battery Life (CIPA)480 shots per charge600 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 143 x 104 x 81 mm
    (5.6 x 4.1 x 3.2 in)
    127 x 97 x 81 mm
    (5.0 x 3.8 x 3.2 in)
    Camera Weight 647 g (22.8 oz) 699 g (24.7 oz)
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