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Sony RX100 V versus Sony A7R III

The Sony Cyber-shot DSC-RX100 V and the Sony Alpha A7R III are two digital cameras that were officially introduced, respectively, in October 2016 and October 2017. The RX100 V is a fixed lens compact, while the A7R III is a mirrorless interchangeable lens camera. The cameras are based on an one-inch (RX100 V) and a full frame sensor. The RX100 V has a resolution of 20 megapixel, whereas the A7R III provides 42.2 MP.

Body comparison

The side-by-side display below illustrates the physical size and weight of the Sony RX100 V and the Sony A7R III. Three consecutive perspectives from the front, the top, and the back are presented. 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 – the RX100 V – represents the basis or 100 percent across all the size and weight measures).

Sony RX100 V vs Sony A7R III front
RX100 V versus A7R III top view
RX100 V and A7R III rear side
Body view (RX100 V on the left)

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7R III is considerably larger (106 percent) than the Sony RX100 V. It is noteworthy in this context that the A7R III is splash and dust-proof, while the RX100 V does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the RX100 V has a lens build in, whereas the A7R III 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 III and their specifications in the Sony FE Lens Catalog.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you want to switch the focus of the display and review another camera pair, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible comparisons there.

Camera Body Specifications
Camera Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(y/n)
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Sony RX100 V (⇒ rgt) 102 mm 58 mm 41 mm 299 g 220 no 2016 999 latest check
Sony A7R III (⇒ lft) 127 mm 96 mm 74 mm 650 g 650 YES 2017 3,199 latest check
Canon G9 X Mark II (⇒ lft | rgt) 98 mm 58 mm 31 mm 206 g 235 no 2017 529 latest check
Canon M5 (⇒ lft | rgt) 116 mm 89 mm 61 mm 427 g 295 no 2016 979 latest check
Canon G9 X (⇒ lft | rgt) 98 mm 58 mm 31 mm 209 g 220 no 2015 529discont. check
Canon T6s (⇒ lft | rgt) 132 mm 101 mm 78 mm 565 g 440 no 2015 849discont. check
Canon G3 X (⇒ lft | rgt) 123 mm 77 mm 105 mm 733 g 300 YES 2015 999 latest check
Nikon D5500 (⇒ lft | rgt) 124 mm 97 mm 70 mm 420 g 820 no 2015 899discont. check
Panasonic FZ2500 (⇒ lft | rgt) 138 mm 102 mm 135 mm 915 g 350 no 2016 1,199 latest check
Sony A99 II (⇒ lft | rgt) 143 mm 104 mm 76 mm 849 g 490 YES 2016 3,199 latest check
Sony A7R II (⇒ lft | rgt) 127 mm 96 mm 60 mm 625 g 290 YES 2015 3,199discont. check
Sony A7S II (⇒ lft | rgt) 127 mm 96 mm 60 mm 627 g 370 YES 2015 2,999 latest check
Sony RX100 IV (⇒ lft | rgt) 102 mm 58 mm 41 mm 298 g 280 no 2015 999discont. check
Sony A7 II (⇒ lft | rgt) 127 mm 96 mm 60 mm 599 g 350 YES 2014 1,999 latest check
Sony RX100 III (⇒ lft | rgt) 102 mm 58 mm 41 mm 290 g 320 no 2014 799discont. check
Sony A7R (⇒ lft | rgt) 127 mm 94 mm 48 mm 465 g 340 YES 2013 2,299discont. check
Sony RX100 II (⇒ lft | rgt) 102 mm 58 mm 38 mm 281 g 350 no 2013 749discont. check

The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The RX100 V was launched at a lower price than the A7R III, 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

The size of the imaging sensor is a crucial determinant of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color depth than smaller pixels 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 tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Sony RX100 V features an one-inch sensor and the Sony A7R III a full frame sensor. The sensor area in the A7R III 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 V and Sony A7R III sensor measures
Sensor size

With 42.2MP, the A7R III offers a higher resolution than the RX100 V (20MP), but the A7R III nevertheless has larger individual pixels (pixel pitch of 4.52μm versus 2.41μm for the RX100 V) due to its larger sensor. Moreover, the A7R III is a somewhat more recent model (by 1 year) than the RX100 V, 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 III has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

Unlike the RX100 V, the A7R III has the capacity to capture high quality composite images 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).

RX100 V versus A7R III MP
Sensor resolution

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 III offers substantially better image quality than the RX100 V (overall score 30 points higher). The advantage is based on 3.2 bits higher color depth, 2.3 EV in additional dynamic range, and 2.6 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.

Sensor Characteristics
Camera Sensor
Class
Resolution
(Megapixel)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Sony RX100 V (⇒ rgt) 1-inch 20.0 5472 3648 4K/30p 22.8 12.4 586 70
Sony A7R III (⇒ lft) Full Frame 42.2 7952 5304 4K/30p 26.0 14.7 3523 100
Canon G9 X Mark II (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 21.9 12.5 522 65
Canon M5 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 23.4 12.4 1262 77
Canon G9 X (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 21.5 12.3 495 63
Canon T6s (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/30p 22.6 12.0 915 70
Canon G3 X (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 21.4 12.3 521 63
Nikon D5500 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 24.1 14.0 1438 84
Panasonic FZ2500 (⇒ lft | rgt) 1-inch 20.0 5472 3648 4K/30p .. .. .. ..
Sony A99 II (⇒ lft | rgt) Full Frame 42.2 7952 5304 4K/30p 25.4 13.4 2317 92
Sony A7R II (⇒ lft | rgt) Full Frame 42.2 7952 5304 4K/30p 26.0 13.9 3434 98
Sony A7S II (⇒ lft | rgt) Full Frame 12.0 4240 2832 4K/30p 23.6 13.3 2993 85
Sony RX100 IV (⇒ lft | rgt) 1-inch 20.0 5472 3648 4K/30p 22.8 12.6 591 70
Sony A7 II (⇒ lft | rgt) Full Frame 24.0 6000 4000 1080/60p 24.9 13.6 2449 90
Sony RX100 III (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 22.4 12.3 495 67
Sony A7R (⇒ lft | rgt) Full Frame 36.2 7360 4912 1080/60p 25.6 14.1 2746 95
Sony RX100 II (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 22.5 12.4 483 67

Many modern cameras are not only capable of taking still images, but also of capturing video footage. 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 A7R III offers a substantially higher resolution than the one in the RX100 V (3686k vs 2359k dots). The table below summarizes some of the other core capabilities of the Sony RX100 V and Sony A7R III in connection with corresponding information for a sample of similar cameras. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.

Core Features
Camera Viewfinder
(Type or
'000 dots)
Control
Panel
(Y/n)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(Y/n)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec))
Build-in
Flash
(GN)
Build-in
Image
Stab
Sony RX100 V (⇒ rgt) 2359 no 3.0 1229 tilting no 2000 24.0 10.2 YES
Sony A7R III (⇒ lft) 3686 no 3.0 1440 tilting YES 8000 10.0 no YES
Canon G9 X Mark II (⇒ lft | rgt) no no 3.0 1040 fixed YES 2000 8.2 6 YES
Canon M5 (⇒ lft | rgt) 2360 no 3.2 1620 tilting YES 4000 9.0 5 no
Canon G9 X (⇒ lft | rgt) no no 3.0 1040 fixed YES 2000 6.0 6 YES
Canon T6s (⇒ lft | rgt) optical YES 3.0 1040 swivel YES 4000 5.0 12 no
Canon G3 X (⇒ lft | rgt) no no 3.2 1620 tilting YES 2000 5.9 6.8 YES
Nikon D5500 (⇒ lft | rgt) optical no 3.2 1037 swivel YES 4000 5.0 12 no
Panasonic FZ2500 (⇒ lft | rgt) 2360 no 3.0 1040 swivel YES 4000 12.0 13.2 YES
Sony A99 II (⇒ lft | rgt) 2400 YES 3.0 1229 tilting no 8000 12.0 no YES
Sony A7R II (⇒ lft | rgt) 2400 no 3.0 1229 tilting no 8000 5.0 no YES
Sony A7S II (⇒ lft | rgt) 2400 no 3.0 1229 tilting no 8000 5.0 no YES
Sony RX100 IV (⇒ lft | rgt) 2359 no 3.0 1228 tilting no 2000 16.0 10.2 YES
Sony A7 II (⇒ lft | rgt) 2400 no 3.0 1230 tilting no 8000 5.0 no YES
Sony RX100 III (⇒ lft | rgt) 1440 no 3.0 1229 tilting no 2000 10.0 YES YES
Sony A7R (⇒ lft | rgt) 2400 no 3.0 1230 tilting no 8000 4.0 no no
Sony RX100 II (⇒ lft | rgt) no no 3.0 1229 tilting no 2000 10.0 15 YES

Both the RX100 V and the A7R III are current models that good online retailers will have in stock. You can check the latest prices, for example, at amazon. The RX100 V replaced the earlier Sony RX100 IV, while the A7R III followed on from the Sony A7R II.

Summary

So how do things add up? Is the Sony RX100 V better than the Sony A7R III or vice versa? Below is a summary of the relative strengths of each of the two contestants.


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

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Faster burst: Shoots at higher frequency (24 vs 10 flaps/sec) to capture the decisive moment.
  • Ready to shoot: Has a lens build-in, whereas the A7R III requires a separate lens.
  • More compact: Is smaller (102x58mm vs 127x96mm) and thus needs less room in the bag.
  • Less heavy: Is lighter even though it comes with a build-in lens (unlike the A7R III).
  • 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 October 2016).

Reasons to prefer the Sony Alpha A7R III:

  • More detail: Has more megapixels (42.2 vs 20MP), which boosts linear resolution by 45%.
  • 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: Scores substantially higher (30 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (3.2 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (2.3 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (2.6 stops ISO advantage).
  • More detailed viewfinder: Has higher resolution electronic viewfinder (3686k vs 2359k 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 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.
  • Longer lasting: Gets more shots (650 versus 220) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Sharper images: Has stabilization technology build-in to reduce the impact of hand-shake.
  • More modern: Was introduced somewhat (1 year) more recently.

If the count of relative strengths (bullet points above) is taken as a measure, the A7R III is the clear winner of the contest (16 : 8 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.

RX100 V 08:16 A7R III

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 V or the A7R III. 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. This is why hands-on reviews by experts are important. The adjacent table relays the overall verdicts of several of the most popular camera review sites. The full reviews are available, respectively, at cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.

Review scores
Camera camera
labs
dp
review
ephoto
zine
imaging
resource
photography
blog
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Sony RX100 V (⇒ rgt) HiRec 83/100 Silver 4/5 5/5 4.5/5 2016 999 latest check
Sony A7R III (⇒ lft) HiRec 90/100 Gold .. .. .. 2017 3,199 latest check
Canon G9 X Mark II (⇒ lft | rgt) .. 75/100 4.5/5 4.5/5 4.5/5 2017 529 latest check
Canon M5 (⇒ lft | rgt) Rec 82/100 Silver 4/5 4.5/5 4/5 2016 979 latest check
Canon G9 X (⇒ lft | rgt) HiRec - 4.5/5 4/5 4.5/5 2015 529discont. check
Canon T6s (⇒ lft | rgt) Rec 77/100 Silver 4.5/5 4.5/5 4.5/5 2015 849discont. check
Canon G3 X (⇒ lft | rgt) Rec - 4.5/5 3.5/5 4/5 2015 999 latest check
Nikon D5500 (⇒ lft | rgt) Rec 79/100 Silver 4.5/5 5/5 4.5/5 2015 899discont. check
Panasonic FZ2500 (⇒ lft | rgt) Rec 82/100 Silver 4.5/5 4.5/5 5/5 2016 1,199 latest check
Sony A99 II (⇒ lft | rgt) - 85/100 Silver 4.5/5 4.5/5 4.5/5 2016 3,199 latest check
Sony A7R II (⇒ lft | rgt) HiRec 90/100 Gold 5/5 4.5/5 5/5 2015 3,199discont. check
Sony A7S II (⇒ lft | rgt) Rec - 4.5/5 5/5 5/5 2015 2,999 latest check
Sony RX100 IV (⇒ lft | rgt) HiRec 85/100 Gold 4/5 4.5/5 4.5/5 2015 999discont. check
Sony A7 II (⇒ lft | rgt) Rec 82/100 Silver 4.5/5 5/5 5/5 2014 1,999 latest check
Sony RX100 III (⇒ lft | rgt) HiRec 82/100 Gold 4.5/5 4.5/5 5/5 2014 799discont. check
Sony A7R (⇒ lft | rgt) HiRec 82/100 Gold 4.5/5 5/5 5/5 2013 2,299discont. check
Sony RX100 II (⇒ lft | rgt) HiRec 79/100 Silver 4.5/5 5/5 4.5/5 2013 749discont. check

Care should be taken when interpreting the review scores above, though. The ratings are only valid when refering to cameras in the same category and of the same age. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

Other comparisons

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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting. If you cannot find the camera you are interested in, kindly get in touch, and I will try to locate and add the respective data to the application.

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