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Sony A7R vs A7S III

The Sony Alpha A7R and the Sony Alpha 7S III are two digital cameras that were revealed to the public, respectively, in October 2013 and July 2020. Both the A7R and the A7S III are mirrorless interchangeable lens cameras that are equipped with a full frame sensor. The A7R has a resolution of 36.2 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 A7R
versus
Sony A7S III
Sony A7R   Sony A7S III
Mirrorless system camera Mirrorless system camera
Sony E mount lenses Sony E mount lenses
36.2 MP – Full Frame 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 (2400k dots) Electronic viewfinder (9440k dots)
3.0" LCD – 1230k dots 3.0" LCD – 1440k dots
Tilting screen (no touchscreen) Swivel touchscreen
4 shutter flaps per second 10 shutter flaps per second
Lens stabilization onlyIn-body stabilization
Weathersealed bodyWeathersealed body
340 shots per battery charge600 shots per battery charge
127 x 94 x 48 mm, 465 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 A7R 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.

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Body comparison

The physical size and weight of the Sony A7R and the Sony A7S III are illustrated 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 size dimensions are rounded to the nearest millimeter.

Size Sony A7R vs Sony A7S III
Compare A7R versus A7S III top
Comparison A7R 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 somewhat larger (3 percent) than the Sony A7R. Moreover, the A7S III is substantially heavier (50 percent) than the A7R. 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. In this particular case, both cameras feature the same lens mount, so that they can use the same lenses. You can compare the optics available in the Sony FE Lens Catalog. Mirrorless cameras, such as the two under consideration, have the additional advantage of having a short flange to focal plane distance, which makes it possible to mount many lenses from other systems onto the camera via adapters.

Concerning battery life, the A7R gets 340 shots out of its Sony NP-FW50 battery, while the A7S III can take 600 images on a single charge of its Sony NP-FZ100 power pack. The battery packs of both cameras can be charged via USB, which can be very convenient when travelling.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Sony A7R 127 mm 94 mm 48 mm 465 g 340 Y Oct 2013 2,299ebay.com
2.
 
Sony A7S III 127 mm 97 mm 81 mm 699 g 600 Y Jul 2020 3,499 amazon.com
3.
 
Nikon D750 141 mm 113 mm 78 mm 750 g 1230 Y Sep 2014 2,299ebay.com
4.
 
Nikon D810 146 mm 123 mm 82 mm 980 g 1200 Y Jun 2014 3,299ebay.com
5.
 
Sony A7C II 124 mm 71 mm 63 mm 514 g 540 Y Aug 2023 2,199 amazon.com
6.
 
Sony A7 IV 131 mm 96 mm 80 mm 659 g 580 Y Oct 2021 2,499 amazon.com
7.
 
Sony A7R IVA 129 mm 96 mm 78 mm 665 g 670 Y Apr 2021 3,499 amazon.com
8.
 
Sony A9 II 129 mm 96 mm 76 mm 678 g 690 Y Oct 2019 4,499 amazon.com
9.
 
Sony A7R IV 129 mm 96 mm 78 mm 665 g 670 Y Jul 2019 3,499ebay.com
10.
 
Sony A7R III 127 mm 96 mm 74 mm 650 g 650 Y Oct 2017 3,199ebay.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 A7 II 127 mm 96 mm 60 mm 599 g 350 Y Nov 2014 1,999ebay.com
14.
 
Sony A7S 127 mm 94 mm 48 mm 489 g 380 Y Apr 2014 2,499ebay.com
15.
 
Sony A7 127 mm 94 mm 48 mm 474 g 340 Y Oct 2013 1,699ebay.com
16.
 
Sony RX1R 113 mm 65 mm 70 mm 482 g 270 n Jun 2013 2,799ebay.com
17.
 
Sony RX1 113 mm 65 mm 70 mm 482 g 270 n Sep 2012 2,799ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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The price is, of course, an important factor in any camera decision. 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 A7R was launched at a markedly lower price (by 34 percent) than the A7S III, which puts it into a different market segment. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. 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.

Sensor comparison

The size of the imaging sensor is a crucial determinant of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units 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 associated with larger, more expensive camera bodies and lenses.

Both cameras under consideration feature a full frame sensor, but their sensors differ slightly in size. The sensor area in the A7S III is 2 percent smaller. 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.

Technology-wise, the A7S III uses a more advanced image processing engine (BIONZ XR) than the A7R (BIONZ X), with benefits for noise reduction, color accuracy, and processing speed.

Sony A7R and Sony A7S III sensor measures

With 36.2MP, the A7R offers a higher resolution than the A7S III (12MP), but the A7R has smaller individual pixels (pixel pitch of 4.88μm versus 8.40μm for the A7S III). Moreover, the A7S III is a much more recent model (by 6 years and 9 months) than the A7R, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixels. Coming back to sensor resolution, it should be mentioned that the A7R has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Sony A7R implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7R for good quality output (200 dots per inch) amounts to 36.8 x 24.6 inches or 93.5 x 62.4 cm, for very good quality (250 dpi) 29.4 x 19.6 inches or 74.8 x 49.9 cm, and for excellent quality (300 dpi) 24.5 x 16.4 inches or 62.3 x 41.6 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 A7R 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 A7R 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.

A7R versus A7S III MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). Of the two cameras under review, the A7R has a notably higher overall DXO score than the A7S III (overall score 9 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 1.9 bits higher color depth, 0.2 EV in additional dynamic range, and 0.1 stops in additional low light sensitivity. 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
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Sony A7R Full Frame 36.2 7360 49121080/60p25.614.1274695
2.
 
Sony A7S III Full Frame 12.0 4240 28324K/120p23.713.9252086
3.
 
Nikon D750 Full Frame 24.2 6016 40161080/60p24.814.5295693
4.
 
Nikon D810 Full Frame 36.2 7360 49121080/60p25.714.8285397
5.
 
Sony A7C II Full Frame 32.7 7008 46724K/60p25.414.7323796
6.
 
Sony A7 IV Full Frame 32.7 7008 46724K/60p25.414.7337997
7.
 
Sony A7R IVA Full Frame 60.2 9504 63364K/30p26.014.8334499
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 A7R III Full Frame 42.2 7952 53044K/30p26.014.73523100
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 A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990
14.
 
Sony A7S Full Frame 12.0 4240 28321080/60p23.913.2370287
15.
 
Sony A7 Full Frame 24.0 6000 40001080/60p24.814.2224890
16.
 
Sony RX1R Full Frame 24.0 6000 40001080/60p25.013.6253791
17.
 
Sony RX1 Full Frame 24.0 6000 40001080/60p25.114.3253493
Note: DXO values in italics represent estimates based on sensor size and age.
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Many modern cameras are not only capable of taking still images, but also of capturing video footage. 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 A7R. It can shoot movie footage at 4K/120p, while the A7R is limited to 1080/60p.

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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 A7R (9440k vs 2400k dots). The adjacent table lists some of the other core features of the Sony A7R and Sony A7S III along with similar information for a selection of comparators.

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Core Features
# image 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 A7R2400 n3.0 / 1230 tilting n 1/8000s 4.0/s n n
2.
 
Sony A7S III9440 n3.0 / 1440 swivel Y 1/8000s 10.0/s n Y
3.
 
Nikon D750optical Y3.2 / 1229 tilting n 1/4000s 6.0/s Y n
4.
 
Nikon D810optical Y3.2 / 1229 fixed n 1/8000s 5.0/s Y n
5.
 
Sony A7C II2360 n3.0 / 1037 swivel Y 1/4000s 10.0/s n Y
6.
 
Sony A7 IV3686 n3.0 / 1037 swivel Y 1/8000s 10.0/s n Y
7.
 
Sony A7R IVA5760 n3.0 / 2340 tilting Y 1/8000s 10.0/s n Y
8.
 
Sony A9 II3686 n3.0 / 1440 tilting Y 1/8000s 20.0/s n Y
9.
 
Sony A7R IV5760 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
10.
 
Sony A7R III3686 n3.0 / 1440 tilting Y 1/8000s 10.0/s n 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 A7 II2400 n3.0 / 1230 tilting n 1/8000s 5.0/s n Y
14.
 
Sony A7S2400 n3.0 / 921 tilting n 1/8000s 5.0/s n n
15.
 
Sony A72400 n3.0 / 1230 tilting n 1/8000s 5.0/s n n
16.
 
Sony RX1Roptional n3.0 / 1229 fixed n 1/4000s 5.0/s Y n
17.
 
Sony RX1optional n3.0 / 1229 fixed n 1/4000s 5.0/s Y n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
padding

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The A7S III has a touchscreen, while the A7R has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

The A7S III has an articulated screen that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in taking selfies. In contrast, the A7R does not have a selfie-screen.

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 A7R 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 A7R only has one slot. The A7S III supports UHS-II cards (on both slots), while the A7R 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 A7R 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
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Sony A7RYstereo / monoYYmicro2.0YY-
2.
 
Sony A7S IIIYstereo / monoYYfull3.2Y-Y
3.
 
Nikon D750Ystereo / monoYYmini2.0Y--
4.
 
Nikon D810Ystereo / monoYYmini3.0Y--
5.
 
Sony A7C IIYstereo / monoYYmicro3.2Y-Y
6.
 
Sony A7 IVYstereo / monoYYfull3.2Y-Y
7.
 
Sony A7R IVAYstereo / monoYYmicro3.2YYY
8.
 
Sony A9 IIYstereo / monoYYmicro3.1YYY
9.
 
Sony A7R IVYstereo / monoYYmicro3.1YYY
10.
 
Sony A7R IIIYstereo / monoYYmicro3.1YYY
11.
 
Sony A7R IIYstereo / monoYYmicro2.0YY-
12.
 
Sony A7S IIYstereo / monoYYmicro2.0YY-
13.
 
Sony A7 IIYstereo / monoYYmicro2.0YY-
14.
 
Sony A7SYstereo / monoYYmicro2.0YY-
15.
 
Sony A7Ystereo / monoYYmicro2.0YY-
16.
 
Sony RX1RYstereo / monoY-mini2.0---
17.
 
Sony RX1Ystereo / monoY-mini2.0---
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The A7S III is a recent model that features in the current product line-up of Sony. In contrast, the A7R has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the A7R was succeeded by the Sony A7R II. Further information on the features and operation of the A7R and A7S III can be found, respectively, in the Sony A7R Manual (free pdf) or the online Sony A7S III Manual.

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Review summary

So what conclusions can be drawn? Is there a clear favorite between the Sony A7R and the Sony A7S III? Which camera is better? The listing below highlights the relative strengths of the two models.


Arguments in favor of the Sony Alpha A7R:

  • More detail: Offers more megapixels (36.2 vs 12MP) with a 74% higher linear resolution.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores markedly higher (9 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (1.9 bits more color depth).
  • Less heavy: Is lighter (by 234g or 33 percent) and hence easier to carry around.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • More affordable: Was introduced into a lower priced category (34 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in October 2013).


Advantages of the Sony Alpha 7S III:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • 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.
  • 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 0.71x).
  • More detailed LCD: Has a higher resolution rear screen (1440k vs 1230k dots).
  • More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster burst: Shoots at higher frequency (10 vs 4 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Longer lasting: Gets more shots (600 versus 340) out of a single battery charge.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • 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 9 months of technical progress since the A7R 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 (20 : 8 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision 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.

A7R 08:20 A7S III

How about other alternatives? Do the specifications of the Sony A7R and the Sony A7S III place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera listing whether the two cameras rank among the cream of the crop.

In any case, while the specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it says little about, for example, the shooting experience and imaging performance of the A7R and the A7S III in practical situations. 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 table below provides a synthesis of the camera assessments of some of the best known photo-gear 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
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Sony A7R5/5+ +..82/1004.5/55/5 Oct 2013 2,299ebay.com
2.
 
Sony A7S III4.5/5+ +5/591/1004.5/55/5 Jul 2020 3,499 amazon.com
3.
 
Nikon D7505/5+ +4/590/1004.5/54.5/5 Sep 2014 2,299ebay.com
4.
 
Nikon D8105/5..5/586/1005/54.5/5 Jun 2014 3,299ebay.com
5.
 
Sony A7C II4/5..4/587/1004.5/54.5/5 Aug 2023 2,199 amazon.com
6.
 
Sony A7 IV5/5+ +4.5/589/1004.5/54.5/5 Oct 2021 2,499 amazon.com
7.
 
Sony A7R IVA5/5+4.5/591/1004.5/55/5 Apr 2021 3,499 amazon.com
8.
 
Sony A9 II....5/590/1005/55/5 Oct 2019 4,499 amazon.com
9.
 
Sony A7R IV5/5+4.5/591/1004.5/55/5 Jul 2019 3,499ebay.com
10.
 
Sony A7R III..+ +4/590/1004.5/55/5 Oct 2017 3,199ebay.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 A7 II5/5+4/582/1004.5/55/5 Nov 2014 1,999ebay.com
14.
 
Sony A7S4/5....86/1004.5/55/5 Apr 2014 2,499ebay.com
15.
 
Sony A75/5+ +..80/1005/55/5 Oct 2013 1,699ebay.com
16.
 
Sony RX1R5/5......4/54.5/5 Jun 2013 2,799ebay.com
17.
 
Sony RX15/5....79/1004/54.5/5 Sep 2012 2,799ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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The review scores listed above should be treated with care, 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 comparisons of ratings among very different cameras or across long time periods have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just use the search menu below. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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    Specifications: Sony A7R 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 A7R Sony A7S III
    Camera Type Mirrorless system camera Mirrorless system camera
    Camera Lens Sony E mount lenses Sony E mount lenses
    Launch Date October 2013 July 2020
    Launch Price USD 2,299 USD 3,499
    Sensor Specs Sony A7R Sony A7S III
    Sensor Technology CMOS BSI-CMOS
    Sensor Format Full Frame Sensor Full Frame Sensor
    Sensor Size 35.9 x 24.0 mm 35.6 x 23.8 mm
    Sensor Area 861.6 mm2 847.28 mm2
    Sensor Diagonal 43.2 mm 42.8 mm
    Crop Factor 1.0x 1.0x
    Sensor Resolution 36.2 Megapixels 12 Megapixels
    Image Resolution 7360 x 4912 pixels 4240 x 2832 pixels
    Pixel Pitch 4.88 μm 8.40 μm
    Pixel Density 4.20 MP/cm2 1.42 MP/cm2
    Moiré control no AA 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) 95 86
    DXO Color Depth (bits) 25.6 23.7
    DXO Dynamic Range (EV) 14.1 13.9
    DXO Low Light (ISO) 2746 2520
    Screen Specs Sony A7R Sony A7S III
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.71x 0.91x
    Viewfinder Resolution 2400k dots 9440k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1230k dots 1440k dots
    LCD Attachment Tilting screen Swivel screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Sony A7R Sony A7S III
    Focus System Contrast-detect AF On-Sensor Phase-detect
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/8000s
    Continuous Shooting 4 shutter flaps/s 10 shutter flaps/s
    Shutter Life Expectancy250 000 actuations200 000 actuations
    Electronic Shutterno E-ShutterYES
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash no On-Board 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 A7R Sony A7S III
    External Flash Hotshoe Hotshoe
    USB Connector USB 2.0 USB 3.2
    HDMI Port micro HDMI full 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 NFC built-in no NFC
    Bluetooth Support no Bluetooth Bluetooth built-in
    Body Specs Sony A7R Sony A7S III
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type Sony NP-FW50 Sony NP-FZ100
    Battery Life (CIPA)340 shots per charge600 shots per charge
    In-Camera Charging USB charging USB charging
    Body Dimensions 127 x 94 x 48 mm
    (5.0 x 3.7 x 1.9 in)
    127 x 97 x 81 mm
    (5.0 x 3.8 x 3.2 in)
    Camera Weight 465 g (16.4 oz) 699 g (24.7 oz)
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