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Sony A77 vs A7R IV

The Sony Alpha SLT-A77 and the Sony Alpha A7R IV are two enthusiast cameras that were revealed to the public, respectively, in August 2011 and July 2019. The A77 is a DSLR, while the A7R IV is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (A77) and a full frame (A7R IV) sensor. The A77 has a resolution of 24 megapixels, whereas the A7R IV provides 60.2 MP.

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

Headline Specifications
Sony A77 versus Sony A7R IV
Sony A77 Sony A7R IV
Digital single lens reflex Mirrorless system camera
Sony A mount lenses Sony E mount lenses
24 MP, APS-C Sensor 60.2 MP, Full Frame Sensor
1080/60p Video 4K/30p Video
ISO 100-16,000 (50 - 25,600) ISO 100-32,000 (50 - 102,400)
Electronic viewfinder (2359k dots) Electronic viewfinder (5760k dots)
3.0 LCD, 921k dots 3.0 LCD, 1440k dots
Fully flexible screen (no touchscreen) Tilting touchscreen
12 shutter flaps per second 10 shutter flaps per second
In-body stabilizationIn-body stabilization
Weathersealed bodyWeathersealed body
470 shots per battery charge670 shots per battery charge
143 x 104 x 81 mm, 732 g 129 x 96 x 78 mm, 665 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Sony Alpha SLT-A77 and the Sony Alpha A7R IV? 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 A77 and the Sony A7R IV 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 size dimensions are rounded to the nearest millimeter.

Size Sony A77 vs Sony A7R IV
Compare A77 versus A7R IV top
Comparison A77 or A7R IV rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7R IV is notably smaller (17 percent) than the Sony A77. Moreover, the A7R IV is markedly lighter (9 percent) than the A77. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.

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

Concerning battery life, the A77 gets 470 shots out of its NP-FM500H battery, while the A7R IV can take 670 images on a single charge of its NP-FZ100 power pack. The power pack in the A7R IV can be charged via the USB port, which can be very convenient 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, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.

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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 A77 5.6 in 4.1 in 3.2 in 25.8 oz 470 Y Aug 2011 1,399i
 
Sony A7R IV 5.1 in 3.8 in 3.1 in 23.5 oz 670 Y Jul 2019 3,499 i
 
Canon 6D 5.7 in 4.4 in 2.8 in 27.2 oz 1090 Y Sep 2012 2,099i
 
Panasonic GH5 5.5 in 3.9 in 3.4 in 25.6 oz 410 Y Jan 2017 1,999 i
 
Pentax K-3 5.2 in 3.9 in 3.0 in 28.2 oz 560 Y Oct 2013 1,299i
 
Sony A7S III 5.0 in 3.8 in 3.2 in 24.7 oz 600 Y Jul 2020 3,499 i
 
Sony A6600 4.7 in 2.6 in 2.7 in 17.7 oz 810 Y Aug 2019 1,399 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 A9 5.0 in 3.8 in 2.5 in 23.7 oz 650 Y Apr 2017 4,499i
 
Sony A6500 4.7 in 2.6 in 2.1 in 16.0 oz 350 Y Oct 2016 1,399i
 
Sony A7R II 5.0 in 3.8 in 2.4 in 22.0 oz 290 Y Jun 2015 3,199i
 
Sony A7S II 5.0 in 3.8 in 2.4 in 22.1 oz 370 Y Sep 2015 2,999i
 
Sony A68 5.6 in 4.1 in 3.2 in 21.5 oz 540 n Nov 2015 699i
 
Sony A7 II 5.0 in 3.8 in 2.4 in 21.1 oz 350 Y Nov 2014 1,999i
 
Sony A77 II 5.6 in 4.1 in 3.2 in 22.8 oz 480 Y May 2014 1,199 i
 
Sony A99 5.8 in 4.4 in 3.1 in 28.6 oz 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.
(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 A77 was launched at a markedly lower price (by 60 percent) than the A7R IV, 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 imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. 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 tend to be associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Sony A77 features an APS-C sensor and the Sony A7R IV a full frame sensor. The sensor area in the A7R IV is 132 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Sony A77 and Sony A7R IV sensor measures

With 60.2MP, the A7R IV offers a higher resolution than the A77 (24MP), but the A7R IV has smaller individual pixels (pixel pitch of 3.76μm versus 3.91μm for the A77). Yet, the A7R IV is a much more recent model (by 7 years and 10 months) than the A77, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the A7R IV has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Sony A7R IV implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7R IV for good quality output (200 dots per inch) amounts to 47.5 x 31.7 inches or 120.7 x 80.5 cm, for very good quality (250 dpi) 38 x 25.3 inches or 96.6 x 64.4 cm, and for excellent quality (300 dpi) 31.7 x 21.1 inches or 80.5 x 53.6 cm. The corresponding values for the Sony A77 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 A7R IV has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

Unlike the A77, the A7R IV has the capacity to capture high quality composite images (241MP) by combining multiple shots after shifting its sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).

The Sony Alpha SLT-A77 has a native sensitivity range from ISO 100 to ISO 16000, which can be extended to ISO 50-25600. The corresponding ISO settings for the Sony Alpha A7R IV are ISO 100 to ISO 32000, with the possibility to increase the ISO range to 50-102400.

A77 versus A7R IV MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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"). 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 A77 APS-C 24.0 6000 40001080/60p24.013.280178
 
Sony A7R IV Full Frame 60.2 9504 63364K/30p........
 
Canon 6D Full Frame 20.0 5472 36481080/30p23.812.1234082
 
Panasonic GH5 Four Thirds 20.2 5184 38884K/60p23.913.080777
 
Pentax K-3 APS-C 24.1 6016 40001080/60i23.713.4121680
 
Sony A7S III Full Frame 12.0 4240 28324K/120p........
 
Sony A6600 APS-C 24.0 6000 40004K/30p23.813.4149782
 
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 A9 Full Frame 24.0 6000 40004K/30p24.913.3351792
 
Sony A6500 APS-C 24.0 6000 40004K/30p24.513.7140585
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
 
Sony A68 APS-C 24.0 6000 40001080/60i24.113.570179
 
Sony A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990
 
Sony A77 II APS-C 24.0 6000 40001080/60p........
 
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 A7R IV provides a better video resolution than the A77. It can shoot movie footage at 4K/30p, while the A77 is limited to 1080/60p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. The two cameras under review are similar with respect to both having an electronic viewfinder. However, the one in the A7R IV offers a substantially higher resolution than the one in the A77 (5760k vs 2359k dots). The table below summarizes some of the other core capabilities of the Sony A77 and Sony A7R IV in connection with corresponding information for a sample of similar 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
 
Sony A772359 Y 3.0 921 full-flex n 1/8000s 12.0 Y Y
 
Sony A7R IV5760 n 3.0 1440 tilting Y 1/8000s 10.0 n Y
 
Canon 6Doptical Y 3.0 1040 fixed n 1/4000s 4.5 n n
 
Panasonic GH53680 n 3.2 1620 swivel Y 1/8000s 12.0 n Y
 
Pentax K-3optical Y 3.2 1037 fixed n 1/8000s 8.3 Y Y
 
Sony A7S III9440 n 3.0 1440 swivel Y 1/8000s 10.0 n Y
 
Sony A66002359 n 3.0 922 tilting Y 1/4000s 11.0 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 A93686 n 3.0 1440 tilting Y 1/8000s 20.0 n Y
 
Sony A65002359 n 3.0 922 tilting Y 1/4000s 11.0 Y Y
 
Sony A7R II2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y
 
Sony A7S II2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y
 
Sony A681440 Y 2.7 460 tilting n 1/4000s 8.0 Y Y
 
Sony A7 II2400 n 3.0 1230 tilting n 1/8000s 5.0 n Y
 
Sony A77 II2359 Y 3.0 1229 full-flex n 1/8000s 12.0 Y Y
 
Sony A992359 Y 3.0 1229 full-flex n 1/8000s 6.0 n Y

One difference between the cameras concerns the presence of an on-board flash. The A77 has one, while the A7R IV does not. While the built-in flash of the A77 is not very powerful, it can at times be useful as a fill-in light.

The A77 has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the A7R IV 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 A7R IV 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 Sony A7R IV 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 A77 writes its imaging data to SDXC or Memory Stick PRO Duo cards, while the A7R IV uses SDXC cards. The A7R IV features dual card slots, which can be very useful in case a memory card fails. In contrast, the A77 only has one slot. The A7R IV supports UHS-II cards (on both slots), while the A77 can use UHS-I cards.

Connectivity comparison

For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Sony Alpha SLT-A77 and Sony Alpha A7R IV 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 A77YstereomonoY-mini2.0---
 
Sony A7R IVYstereomonoYYmicro3.1YYY
 
Canon 6DYmonomonoY-mini2.0Y--
 
Panasonic GH5YstereomonoYYfull3.1Y-Y
 
Pentax K-3YmonomonoYYmini3.0---
 
Sony A7S IIIYstereomonoYYfull3.2Y-Y
 
Sony A6600YstereomonoYYYES2.0YYY
 
Sony A7 IIIYstereomonoYYmicro3.1YYY
 
Sony A7R IIIYstereomonoYYmicro3.1YYY
 
Sony A9YstereomonoYYmicro2.0YYY
 
Sony A6500YstereomonoY-micro2.0YY-
 
Sony A7R IIYstereomonoYYmicro2.0YY-
 
Sony A7S IIYstereomonoYYmicro2.0YY-
 
Sony A68YstereomonoY-micro2.0---
 
Sony A7 IIYstereomonoYYmicro2.0YY-
 
Sony A77 IIYstereomonoY-mini2.0YY-
 
Sony A99YstereomonoYYmini2.0---

It is notable that the A7R IV offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the A77 does not provide wifi capability.

Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.

Travel and landscape photographers will find it useful that the A77 has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.

The A7R IV is a recent model that features in the current product line-up of Sony. In contrast, the A77 has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the A77 was succeeded by the Sony A77 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 how do things add up? Is the Sony A77 better than the Sony A7R IV or vice versa? Below is a summary of the relative strengths of each of the two contestants.


Reasons to prefer the Sony Alpha SLT-A77:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Easier setting verification: Features an LCD display on top to control shooting parameters.
  • More flexible LCD: Has a full-flex screen for odd-angle shots in portrait or landscape orientation.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster burst: Shoots at higher frequency (12 vs 10 flaps/sec) to capture the decisive moment.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • Easier geotagging: Features an internal GPS sensor to log localization data.
  • More affordable: Was introduced into a lower priced category (60 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in August 2011).


Advantages of the Sony Alpha A7R IV:

  • More detail: Has more megapixels (60.2 vs 24MP), which boosts linear resolution by 58%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • High quality composites: Can combine several shots after pixel-shifting its sensor.
  • Better image quality: Is equipped with a larger and more technologically advanced sensor.
  • Richer colors: The sensor size advantage translates into images with better, more accurate colors.
  • More dynamic range: Larger sensor captures a wider spectrum of light and dark details.
  • Better low-light sensitivity: Larger sensor produces good images even in poorly lit environments.
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • More detailed viewfinder: Has higher resolution electronic viewfinder (5760k vs 2359k dots).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.73x).
  • 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.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • More compact: Is smaller (129x96mm vs 143x104mm) and will fit more readily into a bag.
  • Longer lasting: Gets more shots (670 versus 470) out of a single battery charge.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • 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 7 years and 10 months of technical progress since the A77 launch.

If the count of individual advantages (bullet points above) is taken as a guide, the A7R IV is the clear winner of the contest (26 : 9 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.

A77 09:26 A7R IV

How about other alternatives? Do the specifications of the Sony A77 and the Sony A7R IV place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the comparison of 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 A77 or the A7R IV 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 why expert reviews are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear 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 A7791/10081/100..4.5/55/5 Aug 2011 1,399i
 
Sony A7R IV+91/1004.5/55/55/5 Jul 2019 3,499 i
 
Canon 6D+ +83/1004.5/54.5/54.5/5 Sep 2012 2,099i
 
Panasonic GH5+ +85/1004.5/55/55/5 Jan 2017 1,999 i
 
Pentax K-3..83/1005/54.5/55/5 Oct 2013 1,299i
 
Sony A7S III+ +......5/5 Jul 2020 3,499 i
 
Sony A6600+83/1004.5/5..4/5 Aug 2019 1,399 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 A9+ +89/1005/55/55/5 Apr 2017 4,499i
 
Sony A6500+ +85/1004.5/55/54.5/5 Oct 2016 1,399i
 
Sony A7R II+ +90/1005/54.5/55/5 Jun 2015 3,199i
 
Sony A7S II+..4.5/55/55/5 Sep 2015 2,999i
 
Sony A68....4/5..4/5 Nov 2015 699i
 
Sony A7 II+82/1004.5/55/55/5 Nov 2014 1,999i
 
Sony A77 II..80/1004.5/54/55/5 May 2014 1,199 i
 
Sony A99..84/1004.5/5o4.5/5 Sep 2012 2,799i
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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 A77:
Check Ebay offers
Sony A7R IV:
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 A77 vs Sony A7R IV

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

    Camera Specifications
    Camera Model Sony A77 Sony A7R IV
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Sony A mount lenses Sony E mount lenses
    Launch Date August 2011 July 2019
    Launch Price USD 1,399 USD 3,499
    Sensor Specs Sony A77 Sony A7R IV
    Sensor Technology CMOS BSI-CMOS
    Sensor Format APS-C Sensor Full Frame Sensor
    Sensor Size 23.5 x 15.6 mm 35.7 x 23.8 mm
    Sensor Area 366.6 mm2 849.66 mm2
    Sensor Diagonal 28.2 mm 42.9 mm
    Crop Factor 1.5x 1.0x
    Sensor Resolution 24 Megapixels 60.2 Megapixels
    Image Resolution 6000 x 4000 pixels 9504 x 6336 pixels
    Pixel Pitch 3.91 μm 3.76 μm
    Pixel Density 6.55 MP/cm2 7.09 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 1080/60p Video 4K/30p Video
    ISO Setting 100 - 16,000 ISO 100 - 32,000 ISO
    ISO Boost 50 - 25,600 ISO 50 - 102,400 ISO
    Image Processor BIONZ X BIONZ X
    DXO Sensor Quality (score) 78 ..
    DXO Color Depth (bits) 24.0 ..
    DXO Dynamic Range (EV) 13.2 ..
    DXO Low Light (ISO) 801 ..
    Screen Specs Sony A77 Sony A7R IV
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.73x 0.78x
    Viewfinder Resolution 2359k dots 5760k dots
    Top-Level Screen Control Panel no Top Display
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 921k dots 1440k dots
    LCD Attachment Fully flexible screen Tilting screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Sony A77 Sony A7R IV
    Focus System Phase-detect AF On-Sensor Phase-detect
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/8000s
    Continuous Shooting 12 shutter flaps/s 10 shutter flaps/s
    Electronic Shutterno E-ShutterYES
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash Build-in Flash no On-Board Flash
    Storage Medium MS or SDXC cards SDXC cards
    Second Storage Option Single card slot Dual card slots
    UHS card support UHS-I Dual UHS-II
    Connectivity Specs Sony A77 Sony A7R IV
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket PC Sync socket
    USB Connector USB 2.0 USB 3.1
    HDMI Port mini HDMI micro HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket no Headphone port Headphone port
    Wifi Support no Wifi Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Bluetooth Support no Bluetooth Bluetooth built-in
    Geotagging GPS built-in no internal GPS
    Body Specs Sony A77 Sony A7R IV
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type NP-FM500H NP-FZ100
    Battery Life (CIPA)470 shots per charge670 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 143 x 104 x 81 mm
    (5.6 x 4.1 x 3.2 in)
    129 x 96 x 78 mm
    (5.1 x 3.8 x 3.1 in)
    Camera Weight 732 g (25.8 oz) 665 g (23.5 oz)

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