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Sony A7R II vs A9

The Sony Alpha A7R II and the Sony Alpha A9 are two digital cameras that were revealed to the public, respectively, in June 2015 and April 2017. Both the A7R II and the A9 are mirrorless interchangeable lens cameras that are equipped with a full frame sensor. The A7R II has a resolution of 42.2 megapixels, whereas the A9 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 A7R II versus Sony A9
Sony A7R II Sony A9
Mirrorless system camera Mirrorless system camera
Sony E mount lenses Sony E mount lenses
42.2 MP, Full Frame Sensor 24 MP, Full Frame Sensor
4K/30p Video 4K/30p Video
ISO 100-25,600 (50 - 102,400) ISO 100-51,200 (50 - 204,800)
Electronic viewfinder (2400k dots) Electronic viewfinder (3686k dots)
3.0 LCD, 1229k dots 3.0 LCD, 1440k dots
Tilting screen (no touchscreen) Tilting touchscreen
5 shutter flaps per second 20 shutter flaps per second
In-body stabilizationIn-body stabilization
Weathersealed bodyWeathersealed body
290 shots per battery charge650 shots per battery charge
127 x 96 x 60 mm, 625 g 127 x 96 x 63 mm, 673 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Sony Alpha A7R II and the Sony Alpha A9? 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 side-by-side display below illustrates the physical size and weight of the Sony A7R II and the Sony A9. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth dimensions are rounded to the nearest millimeter.

Size Sony A7R II vs Sony A9
Compare A7R II versus A9 top
Comparison A7R II or A9 rear

In this particular case, the Sony A7R II and the Sony A9 have exactly the same width and height, and, thus, have identically-sized bodies. However, the A9 is markedly heavier (8 percent) than the A7R 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. 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 II gets 290 shots out of its NP-FW50 battery, while the A9 can take 650 images on a single charge of its 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 would like to visualize and compare a different camera combination, just use the right or left arrows in the table to switch to the respective camera. Alternatively, you can also navigate to the CAM-parator app and make your selection from the full list of cameras there.

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Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life 1
Weather
Sealing
Camera
Launch 2
Launch
Price (USD)
Street
Price
 
Sony A7R II 5.0 in 3.8 in 2.4 in 22.0 oz 290 Y Jun 2015 3,199i
 
Sony A9 5.0 in 3.8 in 2.5 in 23.7 oz 650 Y Apr 2017 4,499i
 
Nikon Z6 5.3 in 4.0 in 2.6 in 23.8 oz 310 Y Aug 2018 1,999 i
 
Nikon Z7 5.3 in 4.0 in 2.6 in 23.8 oz 330 Y Aug 2018 3,399 i
 
Sony A9 II 5.1 in 3.8 in 3.0 in 23.9 oz 690 Y Oct 2019 4,499 i
 
Sony A7R IV 5.1 in 3.8 in 3.1 in 23.5 oz 670 Y Jul 2019 3,499 i
 
Sony A7 III 5.0 in 3.8 in 2.9 in 22.9 oz 610 Y Feb 2018 1,999 i
 
Sony A7R III 5.0 in 3.8 in 2.9 in 22.9 oz 650 Y Oct 2017 3,199i
 
Sony A99 II 5.6 in 4.1 in 3.0 in 29.9 oz 490 Y Sep 2016 3,199 i
 
Sony A7S II 5.0 in 3.8 in 2.4 in 22.1 oz 370 Y Sep 2015 2,999i
 
Sony A7 II 5.0 in 3.8 in 2.4 in 21.1 oz 350 Y Nov 2014 1,999i
 
Sony A7R 5.0 in 3.7 in 1.9 in 16.4 oz 340 Y Oct 2013 2,299i
Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
(1) Number of images that can be taken on a full battery charge according to the CIPA-standard; (2) Official announcement.

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 A7R II was launched at a markedly lower price (by 29 percent) than the A9, 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. 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. 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. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors are more costly to manufacture and tend to 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 A9 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.

Sony A7R II and Sony A9 sensor measures

With 42.2MP, the A7R II offers a higher resolution than the A9 (24MP), but the A7R II has smaller individual pixels (pixel pitch of 4.52μm versus 5.94μm for the A9). Moreover, the A9 is a somewhat more recent model (by 1 year and 10 months) than the A7R II, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels. Coming back to sensor resolution, it should be mentioned that the A7R II has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Sony A7R II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7R 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 A9 are 30 x 20 inches or 76.2 x 50.8 cm for good quality, 24 x 16 inches or 61 x 40.6 cm for very good quality, and 20 x 13.3 inches or 50.8 x 33.9 cm for excellent quality prints.

The Sony Alpha A7R II has a native sensitivity range from ISO 100 to ISO 25600, which can be extended to ISO 50-102400. The corresponding ISO settings for the Sony Alpha A9 are ISO 100 to ISO 51200, with the possibility to increase the ISO range to 50-204800.

A7R II versus A9 MP

For many cameras, data on sensor performance has been reported by DXO Mark. 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"). Of the two cameras under review, the A7R II has a notably higher overall DXO score than the A9 (overall score 6 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 1.1 bits higher color depth, 0.6 EV in additional dynamic range, and -0 stops of reduced low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar 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
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
 
Sony A9 Full Frame 24.0 6000 40004K/30p24.913.3351792
 
Nikon Z6 Full Frame 24.3 6048 40244K/30p25.314.3329995
 
Nikon Z7 Full Frame 45.4 8256 55044K/30p26.314.6266899
 
Sony A9 II Full Frame 24.0 6000 40004K/30p25.014.0343493
 
Sony A7R IV Full Frame 60.2 9504 63364K/30p........
 
Sony A7 III Full Frame 24.0 6000 40004K/30p25.014.7373096
 
Sony A7R III Full Frame 42.2 7952 53044K/30p26.014.73523100
 
Sony A99 II Full Frame 42.2 7952 53044K/30p25.413.4231792
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
 
Sony A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990
 
Sony A7R Full Frame 36.2 7360 49121080/60p25.614.1274695

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, and both provide the same movie specifications (4K/30p).

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The two cameras under review are similar with respect to both having an electronic viewfinder. However, the one in the A9 offers a substantially higher resolution than the one in the A7R II (3686k vs 2400k dots). The adjacent table lists some of the other core features of the Sony A7R II and Sony A9 along with similar information for a selection of comparators.

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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
 
Sony A7R II2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y
 
Sony A93686 n 3.0 1440 tilting Y 1/8000s 20.0 n Y
 
Nikon Z63690 Y 3.2 2100 tilting Y 1/8000s 12.0 n Y
 
Nikon Z73690 Y 3.2 2100 tilting Y 1/8000s 9.0 n Y
 
Sony A9 II3686 n 3.0 1440 tilting Y 1/8000s 10.0 n Y
 
Sony A7R IV5760 n 3.0 1440 tilting Y 1/8000s 10.0 n Y
 
Sony A7 III2359 n 3.0 922 tilting Y 1/8000s 10.0 n Y
 
Sony A7R III3686 n 3.0 1440 tilting Y 1/8000s 10.0 n Y
 
Sony A99 II2400 Y 3.0 1229 full-flex n 1/8000s 12.0 n Y
 
Sony A7S II2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y
 
Sony A7 II2400 n 3.0 1230 tilting n 1/8000s 5.0 n Y
 
Sony A7R2400 n 3.0 1230 tilting n 1/8000s 4.0 n n

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The A9 has a touchscreen, while the A7R II 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).

Concerning the storage of imaging data, both the A7R II and the A9 write their files to SDXC or Memory Stick PRO Duo cards. The A9 features dual card slots, which can be very useful in case a memory card fails. In contrast, the A7R II only has one slot. The A9 supports UHS-II cards (on its first slot), while the A7R 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 A7R II and Sony Alpha A9 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
 
Sony A7R IIYstereomonoYYmicro2.0YY-
 
Sony A9YstereomonoYYmicro2.0YYY
 
Nikon Z6YstereomonoYYmicro3.1Y-Y
 
Nikon Z7YstereomonoYYmicro3.1Y-Y
 
Sony A9 IIYstereomonoYYmicro3.1YYY
 
Sony A7R IVYstereomonoYYmicro3.1YYY
 
Sony A7 IIIYstereomonoYYmicro3.1YYY
 
Sony A7R IIIYstereomonoYYmicro3.1YYY
 
Sony A99 IIYstereomonoYYmicro2.0YYY
 
Sony A7S IIYstereomonoYYmicro2.0YY-
 
Sony A7 IIYstereomonoYYmicro2.0YY-
 
Sony A7RYstereomonoYYmicro2.0YY-

Studio photographers will appreciate that the Sony A9 (unlike the A7R II) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the A7R II and the A9 have been discontinued, but can regularly be found used on eBay. The A7R II was replaced by the Sony Alpha A7R III, while the A9 was followed by the Sony A9 II. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Sony website.

Review summary

So what is the bottom line? Which of the two cameras – the Sony A7R II or the Sony A9 – has the upper hand? Is one clearly better than the other? A synthesis of the relative strong points of each of the models is listed below.


Arguments in favor of the Sony Alpha A7R II:

  • More detail: Offers more megapixels (42.2 vs 24MP) with a 33% higher linear resolution.
  • 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 assessment.
  • Richer colors: Generates images with noticeably better colors (1.1 bits more color depth).
  • More dynamic range: Captures a larger spectrum of light and dark details (0.6 EV of extra DR).
  • More affordable: Was introduced into a lower priced category (29 percent cheaper at launch).
  • More heavily discounted: Has been on the market for longer (launched in June 2015).


Advantages of the Sony Alpha A9:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • More detailed viewfinder: Has higher resolution electronic viewfinder (3686k vs 2400k dots).
  • 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.
  • Faster burst: Shoots at higher frequency (20 vs 5 flaps/sec) to capture the decisive moment.
  • Longer lasting: Gets more shots (650 versus 290) out of a single battery charge.
  • 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: Was introduced somewhat (1 year and 10 months) more recently.

If the count of relative strengths (bullet points above) is taken as a measure, the A9 is the clear winner of the contest (11 : 7 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 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.

A7R II 07:11 A9

How about other alternatives? Do the specifications of the Sony A7R II and the Sony A9 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 A7R II or the A9 perform in practice. 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 where reviews by experts come in. The adjacent summary-table relays the overall verdicts of several of the most popular camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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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Review Scores
  Camera
Model
camera
  labs  
dp
review  
ephoto
  zine  
imaging
resource
photography
  blog  
Camera
Launch
Launch
Price (USD)
Street
Price
 
Sony A7R II+ +90/1005/54.5/55/5 Jun 2015 3,199i
 
Sony A9+ +89/1005/55/55/5 Apr 2017 4,499i
 
Nikon Z6....4.5/54.5/55/5 Aug 2018 1,999 i
 
Nikon Z7+89/1004.5/54.5/55/5 Aug 2018 3,399 i
 
Sony A9 II..90/1005/5..5/5 Oct 2019 4,499 i
 
Sony A7R IV+91/1004.5/55/55/5 Jul 2019 3,499 i
 
Sony A7 III+ +89/1005/55/55/5 Feb 2018 1,999 i
 
Sony A7R III+ +90/1004.5/55/55/5 Oct 2017 3,199i
 
Sony A99 II..85/1004.5/54.5/54.5/5 Sep 2016 3,199 i
 
Sony A7S II+..4.5/55/55/5 Sep 2015 2,999i
 
Sony A7 II+82/1004.5/55/55/5 Nov 2014 1,999i
 
Sony A7R+ +82/1004.5/55/55/5 Oct 2013 2,299i
Notes: (+ +) 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 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.

Sony A7R II:
Check Ebay offers
Sony A9:
Check Ebay offers

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 your choice using the following search menu. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Sony A7R II vs Sony A9

    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 II Sony A9
    Camera Type Mirrorless system camera Mirrorless system camera
    Camera Lens Sony E mount lenses Sony E mount lenses
    Launch Date June 2015 April 2017
    Launch Price USD 3,199 USD 4,499
    Sensor Specs Sony A7R II Sony A9
    Sensor Technology BSI-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 42.2 Megapixels 24 Megapixels
    Image Resolution 7952 x 5304 pixels 6000 x 4000 pixels
    Pixel Pitch 4.52 μm 5.94 μm
    Pixel Density 4.90 MP/cm2 2.83 MP/cm2
    Moiré control no AA filter Anti-Alias filter
    Movie Capability 4K/30p Video 4K/30p Video
    ISO Setting 100 - 25,600 ISO 100 - 51,200 ISO
    ISO Boost 50 - 102,400 ISO 50 - 204,800 ISO
    Image Processor BIONZ X BIONZ X
    DXO Sensor Quality (score) 98 92
    DXO Color Depth (bits) 26.0 24.9
    DXO Dynamic Range (EV) 13.9 13.3
    DXO Low Light (ISO) 3434 3517
    Screen Specs Sony A7R II Sony A9
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.78x 0.78x
    Viewfinder Resolution 2400k dots 3686k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1229k dots 1440k dots
    LCD Attachment Tilting screen Tilting screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Sony A7R II Sony A9
    Focus System On-Sensor Phase-detect 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
    Shutter Life Expectancy500 000 actuations500 000 actuations
    Electronic ShutterYESup to 1/32000s
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium MS or SDXC cards MS or SDXC cards
    Second Storage Option Single card slot Dual card slots
    UHS card support UHS-I Single UHS-II
    Connectivity Specs Sony A7R II Sony A9
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 2.0
    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 A7R II Sony A9
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type NP-FW50 NP-FZ100
    Battery Life (CIPA)290 shots per charge650 shots per charge
    In-Camera Charging USB charging USB charging
    Body Dimensions 127 x 96 x 60 mm
    (5.0 x 3.8 x 2.4 in)
    127 x 96 x 63 mm
    (5.0 x 3.8 x 2.5 in)
    Camera Weight 625 g (22.0 oz) 673 g (23.7 oz)

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