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Sony RX100 versus Sony A7R

The Sony Cyber-shot DSC-RX100 and the Sony Alpha A7R are two digital cameras that were announced, respectively, in June 2012 and October 2013. The RX100 is a fixed lens compact, while the A7R is a mirrorless interchangeable lens camera. The cameras are based on an one-inch (RX100) and a full frame (A7R) sensor. The RX100 has a resolution of 20 megapixel, whereas the A7R provides 36.2 MP. Read on to find out how these two cameras compare with respect to their size, their sensors, their features, and their reception by expert reviewers.

Body comparison: Sony RX100 vs Sony A7R

An illustration of the physical size and weight of the Sony RX100 and the Sony A7R is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size dimensions are rounded to the nearest millimeter. If you prefer, you can also use the toggle button to switch to a comparison in percentage terms (in this case, the camera on the left side – the RX100 – represents the basis for the calculations across all the size and weight measures).

Compare Sony RX100 vs Sony A7R
Compare RX100 versus A7R top
Compare RX100 and A7R rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7R is considerably larger (102 percent) than the Sony RX100. It is noteworthy in this context that the A7R is splash and dust-proof, while the RX100 does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the RX100 has a lens build in, whereas the A7R is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can find an overview of optics for the A7R and their specifications in the Sony FE Lens Catalog.

Concerning battery life, the RX100 gets 330 shots out of its NP-BX1 battery, while the A7R can take 340 images on a single charge of its NP-FW50 power pack.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Sony RX100» 4.0 in 2.3 in 1.4 in 8.5 oz 330 n Jun 2012 649- i Sony RX100
Sony A7R« 5.0 in 3.7 in 1.9 in 16.4 oz 340 Y Oct 2013 2,299- i Sony A7R
Canon G7 X« » 4.1 in 2.4 in 1.6 in 10.7 oz 210 n Sep 2014 699- i Canon G7 X
Nikon D810« » 5.7 in 4.8 in 3.2 in 34.6 oz 1200 Y Jun 2014 3,299- i Nikon D810
Sony RX100 V« » 4.0 in 2.3 in 1.6 in 10.5 oz 220 n Oct 2016 999 i i Sony RX100 V
Sony A7R II« » 5.0 in 3.8 in 2.4 in 22.0 oz 290 Y Jun 2015 3,199- i Sony A7R II
Sony RX100 IV« » 4.0 in 2.3 in 1.6 in 10.5 oz 280 n Jun 2015 999- i Sony RX100 IV
Sony A7 II« » 5.0 in 3.8 in 2.4 in 21.1 oz 350 Y Nov 2014 1,999- i Sony A7 II
Sony A7S« » 5.0 in 3.7 in 1.9 in 17.2 oz 380 Y Apr 2014 2,499- i Sony A7S
Sony A5100« » 4.3 in 2.5 in 1.4 in 10.0 oz 400 n Aug 2014 549 i i Sony A5100
Sony RX100 III« » 4.0 in 2.3 in 1.6 in 10.2 oz 320 n May 2014 799- i Sony RX100 III
Sony A7« » 5.0 in 3.7 in 1.9 in 16.7 oz 340 Y Oct 2013 1,699- i Sony A7
Sony RX10« » 5.1 in 3.5 in 4.0 in 28.7 oz 420 Y Oct 2013 1,299- i Sony RX10
Sony RX100 II« » 4.0 in 2.3 in 1.5 in 9.9 oz 350 n Jun 2013 749- i Sony RX100 II
Sony NEX-5R« » 4.4 in 2.3 in 1.5 in 9.7 oz 330 n Aug 2012 749- i Sony NEX-5R
Sony NEX-5N« » 4.4 in 2.3 in 1.5 in 9.5 oz 460 n Aug 2011 699- i Sony NEX-5N
Sony NEX-C3« » 4.3 in 2.4 in 1.3 in 7.9 oz 400 n Jun 2011 599- i Sony NEX-C3

The camera’s price is obviously a critical decision-making factor. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The RX100 was launched at a lower price than the A7R, despite having a lens build 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

 

Sensor comparison: Sony RX100 vs Sony A7R

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. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to 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 features an one-inch sensor and the Sony A7R a full frame sensor. The sensor area in the A7R is 643 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.7 and 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Sony RX100 and Sony A7R sensor measures

With 36.2MP, the A7R offers a higher resolution than the RX100 (20MP), but the A7R nevertheless has larger individual pixels (pixel pitch of 4.88μm versus 2.41μm for the RX100) due to its larger sensor. Moreover, the A7R is a somewhat more recent model (by 1 year and 4 months) than the RX100, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the A7R has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

RX100 versus A7R MP

For many cameras, data on sensor performance has been reported by DXO Mark. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). Of the two cameras under consideration, the A7R offers substantially better image quality than the RX100 (overall score 29 points higher). The advantage is based on 3 bits higher color depth, 1.7 EV in additional dynamic range, and 2.8 stops in additional low light sensitivity. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Sony RX100» 1-inch 20.0 5472 36481080/60p22.612.439066Sony RX100
Sony A7R« Full Frame 36.2 7360 49121080/60p25.614.1274695Sony A7R
Canon G7 X« » 1-inch 20.0 5472 36481080/60p23.012.755671Canon G7 X
Nikon D810« » Full Frame 36.2 7360 49121080/60p25.714.8285397Nikon D810
Sony RX100 V« » 1-inch 20.0 5472 36484K/30p22.812.458670Sony RX100 V
Sony A7R II« » Full Frame 42.2 7952 53044K/30p26.013.9343498Sony A7R II
Sony RX100 IV« » 1-inch 20.0 5472 36484K/30p22.812.659170Sony RX100 IV
Sony A7 II« » Full Frame 24.0 6000 40001080/60p24.913.6244990Sony A7 II
Sony A7S« » Full Frame 12.0 4240 28321080/60p23.913.2370287Sony A7S
Sony A5100« » APS-C 24.0 6000 40001080/60p23.812.7134780Sony A5100
Sony RX100 III« » 1-inch 20.0 5472 36481080/60p22.412.349567Sony RX100 III
Sony A7« » Full Frame 24.0 6000 40001080/60p24.814.2224890Sony A7
Sony RX10« » 1-inch 20.0 5472 36481080/60p22.912.647469Sony RX10
Sony RX100 II« » 1-inch 20.0 5472 36481080/60p22.512.448367Sony RX100 II
Sony NEX-5R« » APS-C 16.0 4912 32641080/60i23.713.191078Sony NEX-5R
Sony NEX-5N« » APS-C 16.0 4912 32641080/60i23.612.7107977Sony NEX-5N
Sony NEX-C3« » APS-C 16.0 4912 3264720/30p22.712.2108373Sony NEX-C3

Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, and both provide the same movie specifications (1080/60p).

 

Feature comparison: Sony RX100 vs Sony A7R

Apart from body and sensor, cameras can and do differ across a range of features. For example, the A7R has an electronic viewfinder (2400k dots), which can be very helpful when shooting in bright sunlight. In contrast, the RX100 relies on live view and the rear LCD for framing. The adjacent table lists some of the other core features of the Sony RX100 and Sony A7R along with similar information for a selection of comparators. The full specs-sheets can be found in the camera manual or in the dpreview camera hub.

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)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec)
Build-in
Flash
(yes/no)
Build-in
Image
Stab
Camera
Model
Sony RX100»- n 3.0 1229 fixed n 2000 10.0 Y Y Sony RX100
Sony A7R«2400 n 3.0 1230 tilting n 8000 4.0 n n Sony A7R
Canon G7 X« »- n 3.0 1040 tilting Y 2000 6.5 Y Y Canon G7 X
Nikon D810« »optical Y 3.2 1229 fixed n 8000 5.0 Y n Nikon D810
Sony RX100 V« »2359 n 3.0 1229 tilting n 2000 24.0 Y Y Sony RX100 V
Sony A7R II« »2400 n 3.0 1229 tilting n 8000 5.0 n Y Sony A7R II
Sony RX100 IV« »2359 n 3.0 1228 tilting n 2000 16.0 Y Y Sony RX100 IV
Sony A7 II« »2400 n 3.0 1230 tilting n 8000 5.0 n Y Sony A7 II
Sony A7S« »2400 n 3.0 921 tilting n 8000 5.0 n n Sony A7S
Sony A5100« »- n 3.0 922 tilting Y 4000 6.0 Y n Sony A5100
Sony RX100 III« »1440 n 3.0 1229 tilting n 2000 10.0 Y Y Sony RX100 III
Sony A7« »2400 n 3.0 1230 tilting n 8000 5.0 n n Sony A7
Sony RX10« »1440 Y 3.0 1229 tilting n 3200 10.0 Y Y Sony RX10
Sony RX100 II« »- n 3.0 1229 tilting n 2000 10.0 Y Y Sony RX100 II
Sony NEX-5R« »- n 3.0 920 tilting Y 4000 10.0 n n Sony NEX-5R
Sony NEX-5N« »- n 3.0 920 tilting Y 4000 10.0 n n Sony NEX-5N
Sony NEX-C3« »- n 3.0 920 tilting n 4000 5.5 n n Sony NEX-C3

One difference between the cameras concerns the presence of an on-board flash. The RX100 has one, while the A7R does not. While the build-in flash of the RX100 is not very powerful, it can at times be useful as a fill-in light.

Both the RX100 and the A7R write their imaging data to SDXC or Memory Stick PRO Duo cards.

Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
Sony RX100»-stereomono--micro2.0---Sony RX100
Sony A7R«YstereomonoYYmicro2.0YY-Sony A7R
Canon G7 X« »-stereomono--micro2.0YY-Canon G7 X
Nikon D810« »YstereomonoYYmini3.0Y--Nikon D810
Sony RX100 V« »-stereomono--micro2.0YY-Sony RX100 V
Sony A7R II« »YstereomonoYYmicro2.0YY-Sony A7R II
Sony RX100 IV« »-stereomono--micro2.0YY-Sony RX100 IV
Sony A7 II« »YstereomonoYYmicro2.0YY-Sony A7 II
Sony A7S« »YstereomonoYYmicro2.0YY-Sony A7S
Sony A5100« »-stereomono--micro2.0YY-Sony A5100
Sony RX100 III« »-stereomono--micro2.0YY-Sony RX100 III
Sony A7« »YstereomonoYYmicro2.0YY-Sony A7
Sony RX10« »YstereomonoYYmicro2.0YY-Sony RX10
Sony RX100 II« »Ystereomono--micro2.0YY-Sony RX100 II
Sony NEX-5R« »Ystereomono--mini2.0Y--Sony NEX-5R
Sony NEX-5N« »Ystereomono--mini2.0---Sony NEX-5N
Sony NEX-C3« »Ystereomono--mini2.0---Sony NEX-C3

Both the RX100 and the A7R have been discontinued, but can regularly be found used on eBay. The RX100 was replaced by the Sony RX100 II, while the A7R was followed by the Sony A7R II.

Review summary: Sony RX100 vs Sony A7R

So what conclusions can be drawn? Is there a clear favorite between the Sony RX100 and the Sony A7R? A synthesis of the relative strong points of each of the models is listed below.


Advantages of the Sony Cyber-shot DSC-RX100:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Faster burst: Shoots at higher frequency (10 vs 4 flaps/sec) to capture the decisive moment.
  • Ready to shoot: Has a lens build-in, whereas the A7R requires a separate lens.
  • More compact: Is smaller (102x58mm vs 127x94mm) and thus needs less room in the bag.
  • Less heavy: Is lighter even though it comes with a build-in lens (unlike the A7R).
  • Sharper images: Has hand-shake reducing image stabilization build-in.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More affordable: Was introduced at a lower price, despite coming with a build-in lens.
  • More heavily discounted: Has been on the market for longer (launched in June 2012).


Arguments in favor of the Sony Alpha A7R:

  • More detail: Has more megapixels (36.2 vs 20MP), which boosts linear resolution by 35%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores substantially higher (29 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (3 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (1.7 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (2.8 stops ISO advantage).
  • Better sound: Can connect to an external microphone for higher quality sound recording.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • Easier framing: Has an electronic viewfinder for image framing and settings control.
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 2000/sec) to freeze action.
  • More flexible: Takes interchangeable lenses and can thus be used with specialty optics.
  • 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.
  • Easier file upload: Has wifi build in for automatic backup or image transfer to the web.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • More modern: Was introduced somewhat (1 year and 4 months) more recently.

If the count of relative strengths (bullet points above) is taken as a measure, the A7R is the clear winner of the contest (17 : 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.

RX100 09:17 A7R

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains partial and cannot reveal, for example, the handling experience and imaging performance when actually working with the RX100 or the A7R. 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. This is why hands-on reviews by experts are important. The table below summarizes the assessments of some of the best known camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). You can find the full text of the reviews by clicking on the site logo in the table header.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Sony RX100»HiRec78/1004/55/55/5 Jun 2012 649- i Sony RX100
Sony A7R«HiRec82/1004.5/55/55/5 Oct 2013 2,299- i Sony A7R
Canon G7 X« »HiRec77/1004.5/53.5/54.5/5 Sep 2014 699- i Canon G7 X
Nikon D810« »-86/1005/54.5/54.5/5 Jun 2014 3,299- i Nikon D810
Sony RX100 V« »HiRec83/1004/55/54.5/5 Oct 2016 999 i i Sony RX100 V
Sony A7R II« »HiRec90/1005/54.5/55/5 Jun 2015 3,199- i Sony A7R II
Sony RX100 IV« »HiRec85/1004/54.5/54.5/5 Jun 2015 999- i Sony RX100 IV
Sony A7 II« »Rec82/1004.5/55/55/5 Nov 2014 1,999- i Sony A7 II
Sony A7S« »-86/1004.5/54.5/55/5 Apr 2014 2,499- i Sony A7S
Sony A5100« »Rec-4.5/54.5/55/5 Aug 2014 549 i i Sony A5100
Sony RX100 III« »HiRec82/1004.5/54.5/55/5 May 2014 799- i Sony RX100 III
Sony A7« »HiRec80/1005/54.5/55/5 Oct 2013 1,699- i Sony A7
Sony RX10« »Rec80/1004.5/54.5/54.5/5 Oct 2013 1,299- i Sony RX10
Sony RX100 II« »HiRec79/1004.5/55/54.5/5 Jun 2013 749- i Sony RX100 II
Sony NEX-5R« »--4.5/5-4.5/5 Aug 2012 749- i Sony NEX-5R
Sony NEX-5N« »HiRec79/1004.5/55/54.5/5 Aug 2011 699- i Sony NEX-5N
Sony NEX-C3« »HiRec74/1004.5/54.5/54/5 Jun 2011 599- i Sony NEX-C3

Care should be taken when interpreting the review scores above, 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 rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

 

Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored. If the camera you are interested in is not available, please contact me, and I will try to add information on that model to the database.

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