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Sony A7S vs A9 II

The Sony Alpha A7S and the Sony Alpha A9 II are two professional cameras that were revealed to the public, respectively, in April 2014 and October 2019. Both the A7S and the A9 II are mirrorless interchangeable lens cameras that are equipped with a full frame sensor. The A7S has a resolution of 12 megapixels, whereas the A9 II provides 24 MP.

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

Headline Specifications
Sony A7S
versus
Sony A9 II
Sony A7S   Sony A9 II
Mirrorless system camera Mirrorless system camera
Sony E mount lenses Sony E mount lenses
12 MP – Full Frame sensor 24 MP – Full Frame sensor
1080/60p Video 4K/30p Video
ISO 100-102,400 (50 - 409,600) ISO 100-51,200 (50 - 204,800)
Electronic viewfinder (2400k dots) Electronic viewfinder (3686k dots)
3.0" LCD – 921k dots 3.0" LCD – 1440k dots
Tilting screen (no touchscreen) Tilting touchscreen
5 shutter flaps per second 20 shutter flaps per second
Lens stabilization onlyIn-body stabilization
Weathersealed bodyWeathersealed body
380 shots per battery charge690 shots per battery charge
127 x 94 x 48 mm, 489 g 129 x 96 x 76 mm, 678 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Sony Alpha A7S and the Sony Alpha A9 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.

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Body comparison

An illustration of the physical size and weight of the Sony A7S and the Sony A9 II is provided 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 dimensions are rounded to the nearest millimeter.

Size Sony A7S vs Sony A9 II
Compare A7S versus A9 II top
Comparison A7S or A9 II rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A9 II is somewhat larger (4 percent) than the Sony A7S. Moreover, the A9 II is substantially heavier (39 percent) than the A7S. 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 A7S gets 380 shots out of its Sony NP-FW50 battery, while the A9 II can take 690 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
  empty Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price
Street
Price
1.
 
Sony A7S 127 mm 94 mm 48 mm 489 g 380 Y Apr 2014 US$ 2 499ebay.com
2.
 
Sony A9 II 129 mm 96 mm 76 mm 678 g 690 Y Oct 2019 US$ 4 499 amazon.com
3.
 
Nikon Df 144 mm 110 mm 67 mm 760 g 1400 Y Nov 2013 US$ 2 749ebay.com
4.
 
Sony A7 127 mm 94 mm 48 mm 474 g 340 Y Oct 2013 US$ 1 699ebay.com
5.
 
Sony A7 II 127 mm 96 mm 60 mm 599 g 350 Y Nov 2014 US$ 1 999ebay.com
6.
 
Sony A7 III 127 mm 96 mm 74 mm 650 g 610 Y Feb 2018 US$ 1 999 amazon.com
7.
 
Sony A7C 124 mm 71 mm 60 mm 509 g 740 Y Sep 2020 US$ 1 799 amazon.com
8.
 
Sony A7R 127 mm 94 mm 48 mm 465 g 340 Y Oct 2013 US$ 2 299ebay.com
9.
 
Sony A7R II 127 mm 96 mm 60 mm 625 g 290 Y Jun 2015 US$ 3 199ebay.com
10.
 
Sony A7R IV 129 mm 96 mm 78 mm 665 g 670 Y Jul 2019 US$ 3 499ebay.com
11.
 
Sony A7S II 127 mm 96 mm 60 mm 627 g 370 Y Sep 2015 US$ 2 999ebay.com
12.
 
Sony A7S III 127 mm 97 mm 81 mm 699 g 600 Y Jul 2020 US$ 3 499 amazon.com
13.
 
Sony A9 127 mm 96 mm 63 mm 673 g 650 Y Apr 2017 US$ 4 499ebay.com
14.
 
Sony RX1 113 mm 65 mm 70 mm 482 g 270 n Sep 2012 US$ 2 799ebay.com
15.
 
Sony RX1R 113 mm 65 mm 70 mm 482 g 270 n Jun 2013 US$ 2 799ebay.com
16.
 
Sony RX1R II 113 mm 65 mm 72 mm 507 g 220 n Oct 2015 US$ 3 299ebay.com
17.
 
Sony ZV-E1 121 mm 72 mm 54 mm 483 g 570 Y Mar 2023 US$ 2 199 amazon.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.

The price is, of course, an important factor in any camera decision. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The A7S was launched at a markedly lower price (by 44 percent) than the A9 II, 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.

Sensor comparison

The size of the sensor inside a digital camera is one of the key determinants 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 A9 II is 1 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.

Sony A7S and Sony A9 II sensor measures

Despite having a slightly smaller sensor, the A9 II offers a higher resolution of 24 megapixels, compared with 12 MP of the A7S. 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 5.94μm versus 8.45μm for the A7S). However, it should be noted that the A9 II is much more recent (by 5 years and 5 months) than the A7S, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.

The resolution advantage of the Sony A9 II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A9 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 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 A9 II has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Sony Alpha A7S has a native sensitivity range from ISO 100 to ISO 102400, which can be extended to ISO 50-409600. The corresponding ISO settings for the Sony Alpha A9 II are ISO 100 to ISO 51200, with the possibility to increase the ISO range to 50-204800.

In terms of underlying technology, the A7S is build around a CMOS sensor, while the A9 II uses a Stacked 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.

A7S versus A9 II MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 A9 II has a markedly higher DXO score than the A7S (overall score 6 points higher), which will translate into better image quality. The advantage is based on 1.1 bits higher color depth, 0.8 EV in additional dynamic range, and 0.1 stops of reduced 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
  empty Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Sony A7S Full Frame 12.0 4240 28321080/60p23.913.2370287
2.
 
Sony A9 II Full Frame 24.0 6000 40004K/30p25.014.0343493
3.
 
Nikon Df Full Frame 16.2 4928 3280none24.613.1327989
4.
 
Sony A7 Full Frame 24.0 6000 40001080/60p24.814.2224890
5.
 
Sony A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990
6.
 
Sony A7 III Full Frame 24.0 6000 40004K/30p25.014.7373096
7.
 
Sony A7C Full Frame 24.0 6000 40004K/30p25.014.7340795
8.
 
Sony A7R Full Frame 36.2 7360 49121080/60p25.614.1274695
9.
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
10.
 
Sony A7R IV Full Frame 60.2 9504 63364K/30p26.014.8334499
11.
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
12.
 
Sony A7S III Full Frame 12.0 4240 28324K/120p23.713.9252086
13.
 
Sony A9 Full Frame 24.0 6000 40004K/30p24.913.3351792
14.
 
Sony RX1 Full Frame 24.0 6000 40001080/60p25.114.3253493
15.
 
Sony RX1R Full Frame 24.0 6000 40001080/60p25.013.6253791
16.
 
Sony RX1R II Full Frame 42.2 7952 53041080/60p25.813.9320497
17.
 
Sony ZV-E1 Full Frame 12.0 4240 28324K/60p25.414.6318196
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the A9 II provides a better video resolution than the A7S. It can shoot movie footage at 4K/30p, while the A7S is limited to 1080/60p.

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Feature comparison

Apart from 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 A9 II offers a substantially higher resolution than the one in the A7S (3686k vs 2400k dots). The following table reports on some other key feature differences and similarities of the Sony A7S, the Sony A9 II, and comparable cameras.

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Core Features
  empty 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 A7S2400 n3.0 / 921 tilting n 1/8000s 5.0/s n n
2.
 
Sony A9 II3686 n3.0 / 1440 tilting Y 1/8000s 20.0/s n Y
3.
 
Nikon Dfoptical Y3.2 / 921 fixed n 1/4000s 5.5/s n n
4.
 
Sony A72400 n3.0 / 1230 tilting n 1/8000s 5.0/s n n
5.
 
Sony A7 II2400 n3.0 / 1230 tilting n 1/8000s 5.0/s n Y
6.
 
Sony A7 III2359 n3.0 / 922 tilting Y 1/8000s 10.0/s n Y
7.
 
Sony A7C2360 n3.0 / 922 swivel Y 1/4000s 10.0/s n Y
8.
 
Sony A7R2400 n3.0 / 1230 tilting n 1/8000s 4.0/s n n
9.
 
Sony A7R II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
10.
 
Sony A7R IV5760 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
11.
 
Sony A7S II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
12.
 
Sony A7S III9440 n3.0 / 1440 swivel Y 1/8000s 10.0/s n Y
13.
 
Sony A93686 n3.0 / 1440 tilting Y 1/8000s 20.0/s n Y
14.
 
Sony RX1optional n3.0 / 1229 fixed n 1/4000s 5.0/s Y n
15.
 
Sony RX1Roptional n3.0 / 1229 fixed n 1/4000s 5.0/s Y n
16.
 
Sony RX1R II2360 n3.0 / 1229 tilting n 1/4000s 5.0/s n n
17.
 
Sony ZV-E1none n3.0 / 1037 swivel Y 1/8000s 10.0/s n Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The A9 II has a touchscreen, while the A7S has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

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, both cameras under consideration feature an 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 Sony A9 II has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

The A7S writes its imaging data to SDXC or Memory Stick PRO Duo cards, while the A9 II uses SDXC cards. The A9 II features dual card slots, which can be very useful in case a memory card fails. In contrast, the A7S only has one slot. The A9 II supports UHS-II cards (on both slots), while the A7S 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 A7S and Sony Alpha A9 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
  empty Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Sony A7SYstereo / monoYYmicro2.0YY-
2.
 
Sony A9 IIYstereo / monoYYmicro3.1YYY
3.
 
Nikon DfY- / ---mini2.0---
4.
 
Sony A7Ystereo / monoYYmicro2.0YY-
5.
 
Sony A7 IIYstereo / monoYYmicro2.0YY-
6.
 
Sony A7 IIIYstereo / monoYYmicro3.1YYY
7.
 
Sony A7CYstereo / monoYYmicro3.2YYY
8.
 
Sony A7RYstereo / monoYYmicro2.0YY-
9.
 
Sony A7R IIYstereo / monoYYmicro2.0YY-
10.
 
Sony A7R IVYstereo / monoYYmicro3.1YYY
11.
 
Sony A7S IIYstereo / monoYYmicro2.0YY-
12.
 
Sony A7S IIIYstereo / monoYYfull3.2Y-Y
13.
 
Sony A9Ystereo / monoYYmicro2.0YYY
14.
 
Sony RX1Ystereo / monoY-mini2.0---
15.
 
Sony RX1RYstereo / monoY-mini2.0---
16.
 
Sony RX1R IIYstereo / monoY-micro2.0YY-
17.
 
Sony ZV-E1Ystereo / monoYYmicro3.2Y-Y

Studio photographers will appreciate that the Sony A9 II (unlike the A7S) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

The A9 II is a recent model that features in the current product line-up of Sony. In contrast, the A7S has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the A7S was succeeded by the Sony A7S II. Further information on the features and operation of the A7S and A9 II can be found, respectively, in the Sony A7S Manual (free pdf) or the online Sony A9 II Manual.

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Review summary

So what is the bottom line? Is there a clear favorite between the Sony A7S and the Sony A9 II? Which camera is better? The listing below highlights the relative strengths of the two models.


Arguments in favor of the Sony Alpha A7S:

  • Less heavy: Is lighter (by 189g or 28 percent) and hence easier to carry around.
  • More affordable: Was introduced into a lower priced category (44 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in April 2014).


Reasons to prefer the Sony Alpha A9 II:

  • More detail: Has more megapixels (24 vs 12MP), which boosts linear resolution by 41%.
  • Better image quality: Scores markedly higher (6 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (1.1 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (0.8 EV of extra DR).
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • More detailed viewfinder: Has higher resolution electronic viewfinder (3686k vs 2400k dots).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.71x).
  • More detailed LCD: Has a higher resolution rear screen (1440k vs 921k dots).
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Faster burst: Shoots at higher frequency (20 vs 5 flaps/sec) to capture the decisive moment.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • Longer lasting: Gets more shots (690 versus 380) 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 (3.1 vs 2.0).
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • 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 5 years and 5 months of technical progress since the A7S launch.

If the count of individual advantages (bullet points above) is taken as a guide, the A9 II is the clear winner of the contest (20 : 3 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 wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

A7S 03:20 A9 II

How about other alternatives? Do the specifications of the Sony A7S and the Sony A9 II 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 comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the A7S or the A9 II perform in practice. 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
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price
Street
Price
1.
 
Sony A7S4/5....86/1004.5/55/5 Apr 2014 US$ 2 499ebay.com
2.
 
Sony A9 II....5/590/1005/55/5 Oct 2019 US$ 4 499 amazon.com
3.
 
Nikon Df4/5....81/1004/54/5 Nov 2013 US$ 2 749ebay.com
4.
 
Sony A75/5+ +..80/1005/55/5 Oct 2013 US$ 1 699ebay.com
5.
 
Sony A7 II5/5+4/582/1004.5/55/5 Nov 2014 US$ 1 999ebay.com
6.
 
Sony A7 III..+ +4.5/589/1005/55/5 Feb 2018 US$ 1 999 amazon.com
7.
 
Sony A7C3.5/5..3.5/586/1004/54/5 Sep 2020 US$ 1 799 amazon.com
8.
 
Sony A7R5/5+ +..82/1004.5/55/5 Oct 2013 US$ 2 299ebay.com
9.
 
Sony A7R II5/5+ +5/590/1005/55/5 Jun 2015 US$ 3 199ebay.com
10.
 
Sony A7R IV5/5+4.5/591/1004.5/55/5 Jul 2019 US$ 3 499ebay.com
11.
 
Sony A7S II5/5+....4.5/55/5 Sep 2015 US$ 2 999ebay.com
12.
 
Sony A7S III4.5/5+ +5/591/1004.5/55/5 Jul 2020 US$ 3 499 amazon.com
13.
 
Sony A95/5+ +4.8/589/1005/55/5 Apr 2017 US$ 4 499ebay.com
14.
 
Sony RX15/5....79/1004/54.5/5 Sep 2012 US$ 2 799ebay.com
15.
 
Sony RX1R5/5......4/54.5/5 Jun 2013 US$ 2 799ebay.com
16.
 
Sony RX1R II5/5....82/100..4.5/5 Oct 2015 US$ 3 299ebay.com
17.
 
Sony ZV-E1..+4/5....4.5/5 Mar 2023 US$ 2 199 amazon.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. 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 are interested in seeing how other cameras pair up, 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 vs Sony A9 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 Sony A9 II
    Camera Type Mirrorless system camera Mirrorless system camera
    Camera Lens Sony E mount lenses Sony E mount lenses
    Launch Date April 2014 October 2019
    Launch Price USD 2,499 USD 4,499
    Sensor Specs Sony A7S Sony A9 II
    Sensor Technology CMOS Stacked BSI-CMOS
    Sensor Format Full Frame Sensor Full Frame Sensor
    Sensor Size 35.8 x 23.9 mm 35.6 x 23.8 mm
    Sensor Area 855.62 mm2 847.28 mm2
    Sensor Diagonal 43 mm 42.8 mm
    Crop Factor 1.0x 1.0x
    Sensor Resolution 12 Megapixels 24 Megapixels
    Image Resolution 4240 x 2832 pixels 6000 x 4000 pixels
    Pixel Pitch 8.45 μm 5.94 μm
    Pixel Density 1.40 MP/cm2 2.83 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 1080/60p Video 4K/30p Video
    ISO Setting 100 - 102,400 ISO 100 - 51,200 ISO
    ISO Boost 50 - 409,600 ISO 50 - 204,800 ISO
    Image Processor BIONZ X BIONZ X
    DXO Sensor Quality (score) 87 93
    DXO Color Depth (bits) 23.9 25.0
    DXO Dynamic Range (EV) 13.2 14.0
    DXO Low Light (ISO) 3702 3434
    Screen Specs Sony A7S Sony A9 II
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.71x 0.78x
    Viewfinder Resolution 2400k dots 3686k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 921k dots 1440k dots
    LCD Attachment Tilting screen Tilting screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Sony A7S Sony A9 II
    Focus System Contrast-detect AF On-Sensor Phase-detect
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/8000s
    Continuous Shooting 5 shutter flaps/s 20 shutter flaps/s
    Electronic ShutterYESup to 1/32000s
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium MS or SDXC cards SDXC cards
    Single or Dual Card Slots Single card slot Dual card slots
    UHS card support UHS-I Dual UHS-II
    Connectivity Specs Sony A7S Sony A9 II
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 3.1
    HDMI Port micro 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 NFC built-in NFC built-in
    Bluetooth Support no Bluetooth Bluetooth built-in
    Body Specs Sony A7S Sony A9 II
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type Sony NP-FW50 Sony NP-FZ100
    Battery Life (CIPA)380 shots per charge690 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)
    129 x 96 x 76 mm
    (5.1 x 3.8 x 3.0 in)
    Camera Weight 489 g (17.2 oz) 678 g (23.9 oz)
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    Check A7S offers at
    ebay.com
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    Check A9 II price at
    amazon.com

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