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Sony RX100 IV vs A77 II

The Sony Cyber-shot DSC-RX100 IV and the Sony Alpha SLT-A77 II are two digital cameras that were revealed to the public, respectively, in June 2015 and May 2014. The RX100 IV is a fixed lens compact, while the A77 II is a DSLR. The cameras are based on an one-inch (RX100 IV) and an APS-C (A77 II) sensor. The RX100 IV has a resolution of 20 megapixels, whereas the A77 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 RX100 IV
versus
Sony A77 II
Sony RX100 IV   Sony A77 II
Fixed lens compact camera Digital single lens reflex
24-70mm f/1.8-2.8 Sony A mount lenses
20 MP – 1" sensor 24 MP – APS-C sensor
4K/30p Video 1080/60p Video
ISO 125-12,800 (80 - 25,600) ISO 100-25,600 (50 - 51,200)
Electronic viewfinder (2359k dots) Electronic viewfinder (2359k dots)
3.0" LCD – 1228k dots 3.0" LCD – 1229k dots
Tilting screen (no touchscreen) Fully flexible screen (no touchscreen)
16 shutter flaps per second 12 shutter flaps per second
Lens-based stabilizationIn-body stabilization
not weather sealedWeathersealed body
280 shots per battery charge480 shots per battery charge
102 x 58 x 41 mm, 298 g 143 x 104 x 81 mm, 647 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Sony Cyber-shot DSC-RX100 IV and the Sony Alpha SLT-A77 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

The side-by-side display below illustrates the physical size and weight of the Sony RX100 IV and the Sony A77 II. 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 RX100 IV vs Sony A77 II
Compare RX100 IV versus A77 II top
Comparison RX100 IV or A77 II rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A77 II is considerably larger (151 percent) than the Sony RX100 IV. It is noteworthy in this context that the A77 II is splash and dust-proof, while the RX100 IV does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the RX100 IV has a lens built in, whereas the A77 II is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup.

Concerning battery life, the RX100 IV gets 280 shots out of its Sony NP-BX1 battery, while the A77 II can take 480 images on a single charge of its Sony NP-FM500H power pack. The power pack in the RX100 IV can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.

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

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Body Specifications
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Sony RX100 IV 102 mm 58 mm 41 mm 298 g 280 n Jun 2015 999ebay.com
2.
 
Sony A77 II 143 mm 104 mm 81 mm 647 g 480 Y May 2014 1,199ebay.com
3.
 
Canon G5 X 112 mm 76 mm 44 mm 353 g 210 n Oct 2015 799ebay.com
4.
 
Canon G7 X 103 mm 60 mm 40 mm 304 g 210 n Sep 2014 699ebay.com
5.
 
Nikon D7100 136 mm 107 mm 76 mm 765 g 950 Y Feb 2013 1,199ebay.com
6.
 
Panasonic FZ2500 138 mm 102 mm 135 mm 915 g 350 n Sep 2016 1,199 amazon.com
7.
 
Panasonic FZ1000 137 mm 99 mm 131 mm 831 g 360 n Jun 2014 899ebay.com
8.
 
Sony ZV-1 II 106 mm 60 mm 47 mm 292 g 290 n May 2023 899 amazon.com
9.
 
Sony RX100 VII 102 mm 58 mm 43 mm 302 g 260 n Jul 2019 1,199 amazon.com
10.
 
Sony A6600 120 mm 67 mm 69 mm 503 g 810 Y Aug 2019 1,399 amazon.com
11.
 
Sony RX100 VI 102 mm 58 mm 43 mm 301 g 240 n Jun 2018 1,199ebay.com
12.
 
Sony RX100 V 102 mm 58 mm 41 mm 299 g 220 n Oct 2016 999ebay.com
13.
 
Sony A68 143 mm 104 mm 81 mm 610 g 540 n Nov 2015 699ebay.com
14.
 
Sony RX100 III 102 mm 58 mm 41 mm 290 g 320 n May 2014 799ebay.com
15.
 
Sony A58 129 mm 95 mm 78 mm 492 g 690 n Feb 2013 599ebay.com
16.
 
Sony RX100 II 102 mm 58 mm 38 mm 281 g 350 n Jun 2013 749ebay.com
17.
 
Sony A77 143 mm 104 mm 81 mm 732 g 470 Y Aug 2011 1,399ebay.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 manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The RX100 IV was launched at a lower price than the A77 II, despite having a lens built in. 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 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. 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.

Of the two cameras under consideration, the Sony RX100 IV features an one-inch sensor and the Sony A77 II an APS-C sensor. The sensor area in the A77 II is 216 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.7 and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Sony RX100 IV and Sony A77 II sensor measures

With 24MP, the A77 II offers a higher resolution than the RX100 IV (20MP), but the A77 II nevertheless has larger individual pixels (pixel pitch of 3.91μm versus 2.41μm for the RX100 IV) due to its larger sensor. However, the RX100 IV is a somewhat more recent model (by 1 year and 1 month) than the A77 II, and its sensor might have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units.

The resolution advantage of the Sony A77 II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A77 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 RX100 IV are 27.4 x 18.2 inches or 69.5 x 46.3 cm for good quality, 21.9 x 14.6 inches or 55.6 x 37.1 cm for very good quality, and 18.2 x 12.2 inches or 46.3 x 30.9 cm for excellent quality prints.

The Sony Cyber-shot DSC-RX100 IV has a native sensitivity range from ISO 125 to ISO 12800, which can be extended to ISO 80-25600. The corresponding ISO settings for the Sony Alpha SLT-A77 II are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-51200.

In terms of underlying technology, the RX100 IV is build around a BSI-CMOS sensor, while the A77 II uses a 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.

RX100 IV versus A77 II MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 consideration, the A77 II offers substantially better image quality than the RX100 IV (overall score 12 points higher). The advantage is based on 1.6 bits higher color depth, 0.8 EV in additional dynamic range, and 0.8 stops in additional 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
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Sony RX100 IV 1-inch 20.0 5472 36484K/30p22.812.659170
2.
 
Sony A77 II APS-C 24.0 6000 40001080/60p24.413.4101382
3.
 
Canon G5 X 1-inch 20.0 5472 36481080/60p21.412.347162
4.
 
Canon G7 X 1-inch 20.0 5472 36481080/60p23.012.755671
5.
 
Nikon D7100 APS-C 24.0 6000 40001080/60p24.213.7125683
6.
 
Panasonic FZ2500 1-inch 20.0 5472 36484K/30p23.012.653870
7.
 
Panasonic FZ1000 1-inch 20.0 5472 36484K/30p22.111.751764
8.
 
Sony ZV-1 II 1-inch 20.0 5472 36484K/30p22.312.996567
9.
 
Sony RX100 VII 1-inch 20.0 5472 36484K/30p21.812.441863
10.
 
Sony A6600 APS-C 24.0 6000 40004K/30p23.813.4149782
11.
 
Sony RX100 VI 1-inch 20.0 5472 36484K/30p22.112.347864
12.
 
Sony RX100 V 1-inch 20.0 5472 36484K/30p22.812.458670
13.
 
Sony A68 APS-C 24.0 6000 40001080/60i24.113.570179
14.
 
Sony RX100 III 1-inch 20.0 5472 36481080/60p22.412.349567
15.
 
Sony A58 APS-C 19.8 5456 36321080/60i23.312.575374
16.
 
Sony RX100 II 1-inch 20.0 5472 36481080/60p22.512.448367
17.
 
Sony A77 APS-C 24.0 6000 40001080/60p24.013.280178
Note: DXO values in italics represent estimates based on sensor size and age.
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Many modern cameras cannot only take still pictures, but also record videos. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the RX100 IV provides a higher video resolution than the A77 II. It can shoot video footage at 4K/30p, while the A77 II is limited to 1080/60p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The RX100 IV and the A77 II are similar in the sense that both feature an electronic viewfinder, which is helpful when framing images in bright sunlight. Moreover, their viewfinders offer an identical resolution of 2359k dots. The adjacent table lists some of the other core features of the Sony RX100 IV and Sony A77 II 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 RX100 IV2359 n3.0 / 1228 tilting n 1/2000s 16.0/s Y Y
2.
 
Sony A77 II2359 Y3.0 / 1229 full-flex n 1/8000s 12.0/s Y Y
3.
 
Canon G5 X2360 n3.0 / 1040 swivel Y 1/2000s 5.9/s Y Y
4.
 
Canon G7 Xnone n3.0 / 1040 tilting Y 1/2000s 6.5/s Y Y
5.
 
Nikon D7100optical Y3.2 / 1229 fixed n 1/8000s 6.0/s Y n
6.
 
Panasonic FZ25002360 n3.0 / 1040 swivel Y 1/4000s 12.0/s Y Y
7.
 
Panasonic FZ10002359 n3.0 / 921 swivel n 1/4000s 12.0/s Y Y
8.
 
Sony ZV-1 IInone n3.0 / 922 swivel Y 1/2000s 24.0/s n n
9.
 
Sony RX100 VII2359 n3.0 / 921 tilting Y 1/2000s 90.0/s Y Y
10.
 
Sony A66002359 n3.0 / 922 tilting Y 1/4000s 11.0/s n Y
11.
 
Sony RX100 VI2359 n3.0 / 1229 tilting Y 1/2000s 24.0/s Y Y
12.
 
Sony RX100 V2359 n3.0 / 1229 tilting n 1/2000s 24.0/s Y Y
13.
 
Sony A681440 Y2.7 / 460 tilting n 1/4000s 8.0/s Y Y
14.
 
Sony RX100 III1440 n3.0 / 1229 tilting n 1/2000s 10.0/s Y Y
15.
 
Sony A581440 n2.7 / 460 tilting n 1/4000s 5.0/s Y Y
16.
 
Sony RX100 IIoptional n3.0 / 1229 tilting n 1/2000s 10.0/s Y Y
17.
 
Sony A772359 Y3.0 / 921 full-flex n 1/8000s 12.0/s Y Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
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One feature that is present on the A77 II, but is missing on the RX100 IV is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.

Both cameras have an articulated rear screen that can be turned to be front-facing. This feature will be particularly appreciated by vloggers and photographers who are interested in taking selfies.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the RX100 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).

Concerning the storage of imaging data, both the RX100 IV and the A77 II write their files to SDXC or Memory Stick PRO Duo cards. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.

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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 Cyber-shot DSC-RX100 IV and Sony Alpha SLT-A77 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
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Sony RX100 IV-stereo / mono--micro2.0YY-
2.
 
Sony A77 IIYstereo / monoY-mini2.0YY-
3.
 
Canon G5 XYstereo / mono--mini2.0YY-
4.
 
Canon G7 X-stereo / mono--micro2.0YY-
5.
 
Nikon D7100Ystereo / monoYYmini2.0---
6.
 
Panasonic FZ2500Ystereo / monoYYmicro2.0Y--
7.
 
Panasonic FZ1000Ystereo / monoY-micro2.0YY-
8.
 
Sony ZV-1 IIYstereo / monoY-micro2.0Y-Y
9.
 
Sony RX100 VII-stereo / monoY-micro2.0YYY
10.
 
Sony A6600Ystereo / monoYYYES2.0YYY
11.
 
Sony RX100 VI-stereo / mono--micro2.0YYY
12.
 
Sony RX100 V-stereo / mono--micro2.0YY-
13.
 
Sony A68Ystereo / monoY-micro2.0---
14.
 
Sony RX100 III-stereo / mono--micro2.0YY-
15.
 
Sony A58Ystereo / monoY-mini2.0---
16.
 
Sony RX100 IIYstereo / mono--micro2.0YY-
17.
 
Sony A77Ystereo / monoY-mini2.0---
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It is notable that the A77 II has a microphone port, which can help to improve the quality of audio recordings by attaching an external microphone. The RX100 IV does not feature such a mic input.

Studio photographers will appreciate that the Sony A77 II (unlike the RX100 IV) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the RX100 IV and the A77 II have been discontinued, but can regularly be found used on ebay. The RX100 IV was replaced by the Sony RX100 IV, while the A77 II does not have a direct successor. Further information on the features and operation of the RX100 IV and A77 II can be found, respectively, in the Sony RX100 IV Manual (free pdf) or the online Sony A77 II Manual.

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Review summary

So what is the bottom line? Is the Sony RX100 IV better than the Sony A77 II or vice versa? The listing below highlights the relative strengths of the two models.


Advantages of the Sony Cyber-shot DSC-RX100 IV:

  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
  • Faster burst: Shoots at higher frequency (16 vs 12 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Ready to shoot: Comes with a built-in lens, while the A77 II requires a separate lens.
  • More compact: Is smaller (102x58mm vs 143x104mm) and thus needs less room in the bag.
  • Less heavy: Is lighter even though it comes with a built-in lens (unlike the A77 II).
  • Easier travel charging: Can be conveniently charged via its USB port.
  • More affordable: Was introduced at a lower price, despite coming with a built-in lens.
  • More modern: Is somewhat more recent (announced 1 year and 1 month after the A77 II).


Arguments in favor of the Sony Alpha SLT-A77 II:

  • More detail: Has more megapixels (24 vs 20MP), which boosts linear resolution by 10%.
  • Better image quality: Scores substantially higher (12 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (1.6 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (0.8 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (0.8 stops ISO advantage).
  • Better sound: Can connect to an external microphone for higher quality sound recording.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.73x vs 0.59x).
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • More flexible LCD: Has a full-flex screen for odd-angle shots in portrait or landscape orientation.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/2000s) to freeze action.
  • More flexible: Makes it possible to change lenses and thus to use specialty optics.
  • Longer lasting: Gets more shots (480 versus 280) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • More heavily discounted: Has been on the market for longer (launched in May 2014).

If the count of relative strengths (bullet points above) is taken as a measure, the A77 II is the clear winner of the contest (16 : 9 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.

RX100 IV 09:16 A77 II

How about other alternatives? Do the specifications of the Sony RX100 IV and the Sony A77 II place the cameras among the top in their class? Find out in the latest Best Travel-Zoom Camera and Best DSLR Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it says little about, for example, the shooting experience and imaging performance of the RX100 IV and the A77 II in practical situations. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.

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 (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 RX100 IV4.5/5+ +..85/1004/54.5/5 Jun 2015 999ebay.com
2.
 
Sony A77 II4/5....80/1004.5/55/5 May 2014 1,199ebay.com
3.
 
Canon G5 X5/5+ +..78/1004.5/54.5/5 Oct 2015 799ebay.com
4.
 
Canon G7 X4/5+ +..77/1004.5/54.5/5 Sep 2014 699ebay.com
5.
 
Nikon D71005/5+ +..85/1004.5/54.5/5 Feb 2013 1,199ebay.com
6.
 
Panasonic FZ2500..+..82/1004.5/55/5 Sep 2016 1,199 amazon.com
7.
 
Panasonic FZ10004/5+ +..82/1004.5/54.5/5 Jun 2014 899ebay.com
8.
 
Sony ZV-1 II4.5/5..3.5/583/1003.5/54.5/5 May 2023 899 amazon.com
9.
 
Sony RX100 VII4.5/5..4/5..4/55/5 Jul 2019 1,199 amazon.com
10.
 
Sony A66004/5+4/583/1004.5/54/5 Aug 2019 1,399 amazon.com
11.
 
Sony RX100 VI4.5/5+ +..83/1004/54.5/5 Jun 2018 1,199ebay.com
12.
 
Sony RX100 V4.5/5+ +..83/1004/54.5/5 Oct 2016 999ebay.com
13.
 
Sony A683/5......4/54/5 Nov 2015 699ebay.com
14.
 
Sony RX100 III5/5+ +..82/1004.5/55/5 May 2014 799ebay.com
15.
 
Sony A583/5......4.5/54.5/5 Feb 2013 599ebay.com
16.
 
Sony RX100 II5/5+ +..79/1004.5/54.5/5 Jun 2013 749ebay.com
17.
 
Sony A775/591/100..81/100..5/5 Aug 2011 1,399ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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Care should be taken when interpreting the review scores above, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Thus, a score needs to be put into the context of the launch date and the launch price 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? If you would like to see a different side-by-side camera review, just use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications: Sony RX100 IV vs Sony A77 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 RX100 IV Sony A77 II
    Camera Type Fixed lens compact camera Digital single lens reflex
    Camera Lens 24-70mm f/1.8-2.8 Sony A mount lenses
    Launch Date June 2015 May 2014
    Launch Price USD 999 USD 1,199
    Sensor Specs Sony RX100 IV Sony A77 II
    Sensor Technology BSI-CMOS CMOS
    Sensor Format 1" Sensor APS-C Sensor
    Sensor Size 13.2 x 8.8 mm 23.5 x 15.6 mm
    Sensor Area 116.16 mm2 366.6 mm2
    Sensor Diagonal 15.9 mm 28.2 mm
    Crop Factor 2.7x 1.5x
    Sensor Resolution 20 Megapixels 24 Megapixels
    Image Resolution 5472 x 3648 pixels 6000 x 4000 pixels
    Pixel Pitch 2.41 μm 3.91 μm
    Pixel Density 17.18 MP/cm2 6.55 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 4K/30p Video 1080/60p Video
    ISO Setting 125 - 12,800 ISO 100 - 25,600 ISO
    ISO Boost 80 - 25,600 ISO 50 - 51,200 ISO
    Image Processor BIONZ X BIONZ X
    DXO Sensor Quality (score) 70 82
    DXO Color Depth (bits) 22.8 24.4
    DXO Dynamic Range (EV) 12.6 13.4
    DXO Low Light (ISO) 591 1013
    Screen Specs Sony RX100 IV Sony A77 II
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.59x 0.73x
    Viewfinder Resolution 2359k dots 2359k dots
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1228k dots 1229k dots
    LCD Attachment Tilting screen Fully flexible screen
    Shooting Specs Sony RX100 IV Sony A77 II
    Focus System Contrast-detect AF Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/2000s 1/8000s
    Continuous Shooting 16 shutter flaps/s 12 shutter flaps/s
    Electronic Shutterup to 1/32000sno E-Shutter
    Image StabilizationLens-based stabilizationIn-body stabilization
    Fill Flash Built-in Flash Built-in Flash
    Storage Medium MS or SDXC cards MS or SDXC cards
    Single or Dual Card Slots Single card slot Single card slot
    UHS card support UHS-I UHS-I
    Connectivity Specs Sony RX100 IV Sony A77 II
    External Flash no Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 2.0
    HDMI Port micro HDMI mini HDMI
    Microphone Port no MIC socket External MIC port
    Wifi Support Wifi built-in Wifi built-in
    Near-Field Communication NFC built-in NFC built-in
    Body Specs Sony RX100 IV Sony A77 II
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Sony NP-BX1 Sony NP-FM500H
    Battery Life (CIPA)280 shots per charge480 shots per charge
    In-Camera Charging USB charging no USB charging
    Body Dimensions 102 x 58 x 41 mm
    (4.0 x 2.3 x 1.6 in)
    143 x 104 x 81 mm
    (5.6 x 4.1 x 3.2 in)
    Camera Weight 298 g (10.5 oz) 647 g (22.8 oz)
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    Check RX100 IV offers at
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    Check A77 II offers at
    ebay.com

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