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Sony A7S III vs A99 II

The Sony Alpha 7S III and the Sony Alpha ALT-A99 II are two professional cameras that were revealed to the public, respectively, in July 2020 and September 2016. The A7S III is a mirrorless interchangeable lens camera, while the A99 II is a DSLR. Both cameras are equipped with a full frame sensor. The A7S III has a resolution of 12 megapixels, whereas the A99 II provides 42.2 MP.

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

Headline Specifications
Sony A7S III versus Sony A99 II
Sony A7S III Sony A99 II
Mirrorless system camera Digital single lens reflex
Sony E mount lenses Sony A mount lenses
12 MP, Full Frame Sensor 42.2 MP, Full Frame Sensor
4K/120p Video 4K/30p Video
ISO 80-102,400 (40 - 409,600) ISO 100-25,600
Electronic viewfinder (9440k dots) Electronic viewfinder (2400k dots)
3.0 LCD, 1440k dots 3.0 LCD, 1229k dots
Swivel touchscreen Fully flexible screen (no touchscreen)
10 shutter flaps per second 12 shutter flaps per second
In-body stabilizationIn-body stabilization
Weathersealed bodyWeathersealed body
600 shots per battery charge490 shots per battery charge
127 x 97 x 81 mm, 699 g 143 x 104 x 76 mm, 849 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Sony Alpha 7S III and the Sony Alpha ALT-A99 II? 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

The physical size and weight of the Sony A7S III and the Sony A99 II are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth measures are rounded to the nearest millimeter.

Size Sony A7S III vs Sony A99 II
Compare A7S III versus A99 II top
Comparison A7S III or A99 II rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A99 II is notably larger (21 percent) than the Sony A7S III. Moreover, the A99 II is markedly heavier (21 percent) than the A7S III. 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 A7S III gets 600 shots out of its NP-FZ100 battery, while the A99 II can take 490 images on a single charge of its NP-FM500H power pack. The power pack in the A7S III can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.

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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 A7S III 127 mm 97 mm 81 mm 699 g 600 Y Jul 2020 3,499 i
2.
 
Sony A99 II 143 mm 104 mm 76 mm 849 g 490 Y Sep 2016 3,199 i
3.
 
Canon R5 138 mm 98 mm 88 mm 738 g 320 Y Jul 2020 3,899 i
4.
 
Canon 5DS R 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699 i
5.
 
Nikon D850 146 mm 124 mm 79 mm 1005 g 1840 Y Jul 2017 3,299 i
6.
 
Sony A1 129 mm 97 mm 81 mm 737 g 530 Y Jan 2021 6,499 i
7.
 
Sony A7C 124 mm 71 mm 60 mm 509 g 740 Y Sep 2020 1,799 i
8.
 
Sony A9 II 129 mm 96 mm 76 mm 678 g 690 Y Oct 2019 4,499 i
9.
 
Sony A7R IV 129 mm 96 mm 78 mm 665 g 670 Y Jul 2019 3,499 i
10.
 
Sony A7 III 127 mm 96 mm 74 mm 650 g 610 Y Feb 2018 1,999 i
11.
 
Sony A7R III 127 mm 96 mm 74 mm 650 g 650 Y Oct 2017 3,199i
12.
 
Sony A9 127 mm 96 mm 63 mm 673 g 650 Y Apr 2017 4,499i
13.
 
Sony A7R II 127 mm 96 mm 60 mm 625 g 290 Y Jun 2015 3,199i
14.
 
Sony A7S II 127 mm 96 mm 60 mm 627 g 370 Y Sep 2015 2,999i
15.
 
Sony A99 147 mm 111 mm 78 mm 812 g 500 Y Sep 2012 2,799i
Notes: 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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The A99 II was somewhat cheaper (by 9 percent) than the A7S III at launch, but both cameras fall into the same price category. 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.

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Sensor comparison

The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have 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.

Both cameras under consideration feature a full frame sensor, but their sensors differ slightly in size. The sensor area in the A99 II is 2 percent bigger. They nevertheless have the same format factor of 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Sony A7S III and Sony A99 II sensor measures

With 42.2MP, the A99 II offers a higher resolution than the A7S III (12MP), but the A99 II has smaller individual pixels (pixel pitch of 4.52μm versus 8.40μm for the A7S III). Yet, the A7S III is a much more recent model (by 3 years and 10 months) than the A99 II, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the A99 II has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Sony A99 II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A99 II for good quality output (200 dots per inch) amounts to 39.8 x 26.5 inches or 101 x 67.4 cm, for very good quality (250 dpi) 31.8 x 21.2 inches or 80.8 x 53.9 cm, and for excellent quality (300 dpi) 26.5 x 17.7 inches or 67.3 x 44.9 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 A99 II has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Sony Alpha 7S III has a native sensitivity range from ISO 80 to ISO 102400, which can be extended to ISO 40-409600. The corresponding ISO settings for the Sony Alpha ALT-A99 II are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-25600.

A7S III versus A99 II MP

For many cameras, data on sensor performance has been reported by DXO Mark. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. Of the two cameras under consideration, the A99 II has a markedly higher DXO score than the A7S III (overall score 6 points higher), which will translate into better image quality. The advantage is based on 1.7 bits higher color depth, 0.5 EV of lower dynamic range, and 0.1 stops of reduced low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

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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 A7S III Full Frame 12.0 4240 28324K/120p23.713.9252086
2.
 
Sony A99 II Full Frame 42.2 7952 53044K/30p25.413.4231792
3.
 
Canon R5 Full Frame 44.8 8192 54648k/30p25.314.6304295
4.
 
Canon 5DS R Full Frame 50.3 8688 57921080/30p24.612.4230886
5.
 
Nikon D850 Full Frame 45.4 8256 55044K/30p26.414.82660100
6.
 
Sony A1 Full Frame 49.8 8640 57608k/30p........
7.
 
Sony A7C Full Frame 24.0 6000 40004K/30p25.014.7340795
8.
 
Sony A9 II Full Frame 24.0 6000 40004K/30p25.014.0343493
9.
 
Sony A7R IV Full Frame 60.2 9504 63364K/30p26.014.8334499
10.
 
Sony A7 III Full Frame 24.0 6000 40004K/30p25.014.7373096
11.
 
Sony A7R III Full Frame 42.2 7952 53044K/30p26.014.73523100
12.
 
Sony A9 Full Frame 24.0 6000 40004K/30p24.913.3351792
13.
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
14.
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
15.
 
Sony A99 Full Frame 24.0 6000 40001080/60p25.014.0155589

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 higher frame rate than the A99 II. It can shoot video footage at 4K/120p, while the A99 II is limited to 4K/30p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The two cameras under consideration 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 A99 II (9440k vs 2400k dots). The following table reports on some other key feature differences and similarities of the Sony A7S III, the Sony A99 II, and comparable cameras.

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Core Features
    Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
(000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Sony A7S III9440 n 3.0 1440 swivel Y 1/8000s 10.0 n Y
2.
 
Sony A99 II2400 Y 3.0 1229 full-flex n 1/8000s 12.0 n Y
3.
 
Canon R55760 Y 3.2 2100 swivel Y 1/8000s 10.0 n Y
4.
 
Canon 5DS Roptical Y 3.2 1040 fixed n 1/8000s 5.0 n n
5.
 
Nikon D850optical Y 3.2 2359 tilting Y 1/8000s 9.0 n n
6.
 
Sony A19437 n 3.0 1440 tilting Y 1/8000s 10.0 n Y
7.
 
Sony A7C2360 n 3.0 922 swivel Y 1/4000s 10.0 n Y
8.
 
Sony A9 II3686 n 3.0 1440 tilting Y 1/8000s 10.0 n Y
9.
 
Sony A7R IV5760 n 3.0 1440 tilting Y 1/8000s 10.0 n Y
10.
 
Sony A7 III2359 n 3.0 922 tilting Y 1/8000s 10.0 n Y
11.
 
Sony A7R III3686 n 3.0 1440 tilting Y 1/8000s 10.0 n Y
12.
 
Sony A93686 n 3.0 1440 tilting Y 1/8000s 20.0 n Y
13.
 
Sony A7R II2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y
14.
 
Sony A7S II2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y
15.
 
Sony A992359 Y 3.0 1229 full-flex n 1/8000s 6.0 n Y

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The A7S III has a touchscreen, while the A99 II has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

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 A7S III writes its imaging data to CFexpress or SDXC cards, while the A99 II uses SDXC or Memory Stick PRO Duo cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. The A7S III supports UHS-II cards (on both slots), while the A99 II can use UHS-I cards.

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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 7S III and Sony Alpha ALT-A99 II 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
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Sony A7S IIIYstereomonoYYfull3.2Y-Y
2.
 
Sony A99 IIYstereomonoYYmicro2.0YYY
3.
 
Canon R5YmonomonoYYmicro3.2Y-Y
4.
 
Canon 5DS RYmonomonoY-mini3.0---
5.
 
Nikon D850YstereomonoYYmini3.0YYY
6.
 
Sony A1YstereomonoYYmini3.2Y-Y
7.
 
Sony A7CYstereomonoYYmicro3.2YYY
8.
 
Sony A9 IIYstereomonoYYmicro3.1YYY
9.
 
Sony A7R IVYstereomonoYYmicro3.1YYY
10.
 
Sony A7 IIIYstereomonoYYmicro3.1YYY
11.
 
Sony A7R IIIYstereomonoYYmicro3.1YYY
12.
 
Sony A9YstereomonoYYmicro2.0YYY
13.
 
Sony A7R IIYstereomonoYYmicro2.0YY-
14.
 
Sony A7S IIYstereomonoYYmicro2.0YY-
15.
 
Sony A99YstereomonoYYmini2.0---

Studio photographers will appreciate that the Sony A99 II (unlike the A7S III) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the A7S III and the A99 II are recent models that are part of the current product line-up. The A7S III replaced the earlier Sony A7S II, while the A99 II does not have a direct predecessor. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Sony website.

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Review summary

So what conclusions can be drawn? Is there a clear favorite between the Sony A7S III and the Sony A99 II? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.


Arguments in favor of the Sony Alpha 7S III:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better video: Provides higher movie framerates (4K/120p versus 4K/30p).
  • More detailed viewfinder: Has higher resolution electronic viewfinder (9440k vs 2400k dots).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.91x vs 0.78x).
  • More detailed LCD: Has a higher resolution rear screen (1440k vs 1229k dots).
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More compact: Is smaller (127x97mm vs 143x104mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 150g or 18 percent) and hence easier to carry around.
  • Longer lasting: Can take more shots (600 versus 490) on a single battery charge.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • More legacy lens friendly: Can take a broad range of 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.
  • Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
  • More modern: Reflects 3 years and 10 months of technical progress since the A99 II launch.


Reasons to prefer the Sony Alpha ALT-A99 II:

  • More detail: Has more megapixels (42.2 vs 12MP), which boosts linear resolution by 87%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores markedly higher (6 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (1.7 bits more color depth).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • Faster burst: Shoots at higher frequency (12 vs 10 flaps/sec) to capture the decisive moment.
  • 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 heavily discounted: Has been around for much longer (launched in September 2016).

If the number of relative strengths (bullet points above) is taken as a guide, the A7S III is the clear winner of the match-up (16 : 10 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

A7S III 16:10 A99 II

How about other alternatives? Do the specifications of the Sony A7S III and the Sony A99 II place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best DSLR 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 remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the A7S III or the A99 II. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is where reviews by experts come in. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], 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 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Sony A7S III..+ +91/1004.5/55/5 Jul 2020 3,499 i
2.
 
Sony A99 II....85/1004.5/54.5/5 Sep 2016 3,199 i
3.
 
Canon R54.5/5..91/1004.5/54.5/5 Jul 2020 3,899 i
4.
 
Canon 5DS R5/5+83/1005/54.5/5 Feb 2015 3,699 i
5.
 
Nikon D8504.5/5+ +89/1004.5/55/5 Jul 2017 3,299 i
6.
 
Sony A1.......... Jan 2021 6,499 i
7.
 
Sony A7C3.5/5..86/1004/54/5 Sep 2020 1,799 i
8.
 
Sony A9 II....90/1005/55/5 Oct 2019 4,499 i
9.
 
Sony A7R IV5/5+91/1004.5/55/5 Jul 2019 3,499 i
10.
 
Sony A7 III..+ +89/1005/55/5 Feb 2018 1,999 i
11.
 
Sony A7R III..+ +90/1004.5/55/5 Oct 2017 3,199i
12.
 
Sony A95/5+ +89/1005/55/5 Apr 2017 4,499i
13.
 
Sony A7R II5/5+ +90/1005/55/5 Jun 2015 3,199i
14.
 
Sony A7S II5/5+..4.5/55/5 Sep 2015 2,999i
15.
 
Sony A995/5..84/1004.5/54.5/5 Sep 2012 2,799i
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The ratings are only valid when referring to cameras in the same category and of the same age. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

Sony A7S III:
Check Amazon price
Sony A99 II:
Check Amazon price

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 make a corresponding selection in the search boxes below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Sony A7S III vs Sony A99 II

    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 A7S III Sony A99 II
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Sony E mount lenses Sony A mount lenses
    Launch Date July 2020 September 2016
    Launch Price USD 3,499 USD 3,199
    Sensor Specs Sony A7S III Sony A99 II
    Sensor Technology BSI-CMOS BSI-CMOS
    Sensor Format Full Frame Sensor Full Frame Sensor
    Sensor Size 35.6 x 23.8 mm 35.9 x 24.0 mm
    Sensor Area 847.28 mm2 861.6 mm2
    Sensor Diagonal 42.8 mm 43.2 mm
    Crop Factor 1.0x 1.0x
    Sensor Resolution 12 Megapixels 42.2 Megapixels
    Image Resolution 4240 x 2832 pixels 7952 x 5304 pixels
    Pixel Pitch 8.40 μm 4.52 μm
    Pixel Density 1.42 MP/cm2 4.90 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 4K/120p Video 4K/30p Video
    ISO Setting 80 - 102,400 ISO 100 - 25,600 ISO
    ISO Boost 40 - 409,600 ISO 50 - 25,600 ISO
    Image Processor BIONZ XR BIONZ X
    DXO Sensor Quality (score) 86 92
    DXO Color Depth (bits) 23.7 25.4
    DXO Dynamic Range (EV) 13.9 13.4
    DXO Low Light (ISO) 2520 2317
    Screen Specs Sony A7S III Sony A99 II
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.91x 0.78x
    Viewfinder Resolution 9440k dots 2400k dots
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1440k dots 1229k dots
    LCD Attachment Swivel screen Fully flexible screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Sony A7S III Sony A99 II
    Focus System Contrast-detect AF Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/8000s
    Continuous Shooting 10 shutter flaps/s 12 shutter flaps/s
    Shutter Life Expectancy200 000 actuations300 000 actuations
    Electronic ShutterYESno E-Shutter
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium CFexpress or SDXC cards MS or SDXC cards
    Second Storage Option Dual card slots Dual card slots
    UHS card support Dual UHS-II UHS-I
    Connectivity Specs Sony A7S III Sony A99 II
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 3.2 USB 2.0
    HDMI Port full HDMI micro HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket Headphone port Headphone port
    Wifi Support Wifi built-in Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Bluetooth Support Bluetooth built-in Bluetooth built-in
    Body Specs Sony A7S III Sony A99 II
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type NP-FZ100 NP-FM500H
    Battery Life (CIPA)600 shots per charge490 shots per charge
    In-Camera Charging USB charging no USB charging
    Body Dimensions 127 x 97 x 81 mm
    (5.0 x 3.8 x 3.2 in)
    143 x 104 x 76 mm
    (5.6 x 4.1 x 3.0 in)
    Camera Weight 699 g (24.7 oz) 849 g (29.9 oz)

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