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Sony A6300 versus Sony A7R III

The Sony Alpha A6300 and the Sony Alpha A7R III are two enthusiast cameras that were revealed to the public, respectively, in February 2016 and October 2017. Both the A6300 and the A7R III are mirrorless interchangeable lens cameras that are based on an APS-C (A6300) and a full frame (A7R III) sensor. The A6300 has a resolution of 24 megapixel, whereas the A7R III provides 42.2 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 A6300 vs Sony A7R III

The side-by-side display below illustrates the physical size and weight of the Sony A6300 and the Sony A7R III. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth measures 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 A6300 – represents 100 percent across all the size and weight measures).

Compare Sony A6300 vs Sony A7R III
Compare A6300 versus A7R III top
Compare A6300 and A7R III rear

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 (52 percent) than the Sony A6300. Moreover, the A7R III is substantially heavier (61 percent) than the A6300. 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. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can find an overview of optics for the two cameras in the Sony E-Mount Lens Catalog (A6300) and the Sony FE Lens Catalog (A7R III). 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 A6300 gets 400 shots out of its NP-FW50 battery, while the A7R III can take 650 images on a single charge of its NP-FZ100 power pack.

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.

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 A6300» 120 mm 67 mm 49 mm 404 g 400 Y Feb 2016 999- i Sony A6300
Sony A7R III« 127 mm 96 mm 74 mm 650 g 650 Y Oct 2017 3,199 i i Sony A7R III
Canon 80D« » 139 mm 105 mm 79 mm 730 g 960 Y Feb 2016 1,199 i i Canon 80D
Canon M5« » 116 mm 89 mm 61 mm 427 g 295 n Sep 2016 979 i i Canon M5
Nikon D5500« » 124 mm 97 mm 70 mm 420 g 820 n Jan 2015 899- i Nikon D5500
Nikon D7200« » 136 mm 107 mm 76 mm 765 g 1110 Y Mar 2015 1,199- i Nikon D7200
Sony A7 III« » 127 mm 96 mm 74 mm 650 g 610 Y Feb 2018 1,999 i i Sony A7 III
Sony A99 II« » 143 mm 104 mm 76 mm 849 g 490 Y Sep 2016 3,199 i i Sony A99 II
Sony A6500« » 120 mm 67 mm 53 mm 453 g 350 Y Oct 2016 1,399 i i Sony A6500
Sony RX10 III« » 133 mm 94 mm 127 mm 1051 g 420 Y Mar 2016 1,499- i Sony RX10 III
Sony RX100 V« » 102 mm 58 mm 41 mm 299 g 220 n Oct 2016 999 i i Sony RX100 V
Sony A7R II« » 127 mm 96 mm 60 mm 625 g 290 Y Jun 2015 3,199- i Sony A7R II
Sony RX10 II« » 129 mm 88 mm 102 mm 813 g 400 Y Jun 2015 1,299- i Sony RX10 II
Sony RX100 IV« » 102 mm 58 mm 41 mm 298 g 280 n Jun 2015 999- i Sony RX100 IV
Sony A7 II« » 127 mm 96 mm 60 mm 599 g 350 Y Nov 2014 1,999- i Sony A7 II
Sony A6000« » 120 mm 67 mm 45 mm 344 g 360 n Feb 2014 599- i Sony A6000
Sony A7R« » 127 mm 94 mm 48 mm 465 g 340 Y Oct 2013 2,299- i Sony A7R

Any camera purchase will naturally be influenced heavily by the price. 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 A6300 was launched at a markedly lower price (by 69 percent) than the A7R III, 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.

 

Sensor comparison: Sony A6300 vs Sony A7R III

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. 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 A6300 features an APS-C sensor and the Sony A7R III a full frame sensor. The sensor area in the A7R III is 135 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 A6300 and Sony A7R III sensor measures

With 42.2MP, the A7R III offers a higher resolution than the A6300 (24MP), but the A7R III nevertheless has larger individual pixels (pixel pitch of 4.52μm versus 3.91μm for the A6300) due to its larger sensor. Moreover, the A7R III is a somewhat more recent model (by 1 year and 8 months) than the A6300, 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 A6300, 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).

A6300 versus A7R III 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"). Of the two cameras under consideration, the A7R III offers substantially better image quality than the A6300 (overall score 15 points higher). The advantage is based on 1.6 bits higher color depth, 1 EV in additional dynamic range, and 1.3 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
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Sony A6300» APS-C 24.0 6000 40004K/30p24.413.7143785Sony A6300
Sony A7R III« Full Frame 42.2 7952 53044K/30p26.014.73523100Sony A7R III
Canon 80D« » APS-C 24.0 6000 40001080/60p23.613.2113579Canon 80D
Canon M5« » APS-C 24.0 6000 40001080/60p23.412.4126277Canon M5
Nikon D5500« » APS-C 24.0 6000 40001080/60p24.114.0143884Nikon D5500
Nikon D7200« » APS-C 24.0 6000 40001080/60p24.514.6133387Nikon D7200
Sony A7 III« » Full Frame 24.0 6000 40004K/30p25.014.7373096Sony A7 III
Sony A99 II« » Full Frame 42.2 7952 53044K/30p25.413.4231792Sony A99 II
Sony A6500« » APS-C 24.0 6000 40004K/30p24.513.7140585Sony A6500
Sony RX10 III« » 1-inch 20.0 5472 36484K/30p23.112.647270Sony RX10 III
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 RX10 II« » 1-inch 20.0 5472 36484K/30p23.012.653170Sony RX10 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 A6000« » APS-C 24.0 6000 40001080/60p24.113.1134782Sony A6000
Sony A7R« » Full Frame 36.2 7360 49121080/60p25.614.1274695Sony A7R

Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, and both provide the same movie specifications (4K/30p).

 

Feature comparison: Sony A6300 vs Sony A7R III

Apart from 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 III offers a substantially higher resolution than the one in the A6300 (3686k vs 2300k dots). The table below summarizes some of the other core capabilities of the Sony A6300 and Sony A7R III in connection with corresponding information for a sample of similar cameras. If you need more detail on the specs, you can find comprehensive listings, for example, 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 A6300»2300 n 3.0 922 tilting n 4000 11.0 Y n Sony A6300
Sony A7R III«3686 n 3.0 1440 tilting Y 8000 10.0 n Y Sony A7R III
Canon 80D« »optical Y 3.0 1040 swivel Y 8000 7.0 Y n Canon 80D
Canon M5« »2360 n 3.2 1620 tilting Y 4000 9.0 Y n Canon M5
Nikon D5500« »optical n 3.2 1037 swivel Y 4000 5.0 Y n Nikon D5500
Nikon D7200« »optical Y 3.2 1229 fixed n 8000 6.0 Y n Nikon D7200
Sony A7 III« »2359 n 3.0 922 tilting Y 8000 10.0 n Y Sony A7 III
Sony A99 II« »2400 Y 3.0 1229 full-flex n 8000 12.0 n Y Sony A99 II
Sony A6500« »2300 n 3.0 922 tilting Y 4000 11.0 Y Y Sony A6500
Sony RX10 III« »2359 Y 3.0 1229 tilting n 2000 14.0 Y Y Sony RX10 III
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 RX10 II« »2359 Y 3.0 1229 tilting n 3200 14.0 Y Y Sony RX10 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 A6000« »1440 n 3.0 922 tilting n 4000 11.0 Y n Sony A6000
Sony A7R« »2400 n 3.0 1230 tilting n 8000 4.0 n n Sony A7R

The A7R III is a current model that online retailers, such as amazon, will have in stock. In contrast, the A6300 has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the A6300 was succeeded by the Sony A6500.

Review summary: Sony A6300 vs Sony A7R III

So what is the bottom line? Which of the two cameras – the Sony A6300 or the Sony A7R III – has the upper hand? A synthesis of the relative strong points of each of the models is listed below.


Advantages of the Sony Alpha A6300:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • More compact: Is smaller (120x67mm vs 127x96mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 246g or 38 percent) and hence easier to carry around.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More affordable: Was introduced into a lower priced category (69 percent cheaper at launch).
  • More heavily discounted: Has been on the market for longer (launched in February 2016).


Reasons to prefer the Sony Alpha A7R III:

  • More detail: Has more megapixels (42.2 vs 24MP), which boosts linear resolution by 33%.
  • 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 (15 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 (1 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (1.3 stops ISO advantage).
  • More detailed viewfinder: Has higher resolution electronic viewfinder (3686k vs 2300k dots).
  • More detailed LCD: Has a higher resolution rear screen (1440k vs 922k dots).
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
  • Longer lasting: Gets more shots (650 versus 400) out of a single battery charge.
  • Sharper images: Has stabilization technology build-in to reduce the impact of hand-shake.
  • More modern: Was introduced somewhat (1 year and 8 months) more recently.

If the number of relative strengths (bullet points above) is taken as a guide, the A7R III is the clear winner of the contest (14 : 6 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.

A6300 06:14 A7R III

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the A6300 and the A7R III in practical situations. 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 where reviews by experts come in. The adjacent table relays the overall verdicts of several of the most popular 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 A6300»Rec85/1005/55/55/5 Feb 2016 999- i Sony A6300
Sony A7R III«HiRec90/1004.5/55/55/5 Oct 2017 3,199 i i Sony A7R III
Canon 80D« »HiRec84/1004.5/54.5/54.5/5 Feb 2016 1,199 i i Canon 80D
Canon M5« »Rec82/1004/54.5/54/5 Sep 2016 979 i i Canon M5
Nikon D5500« »Rec79/1004.5/55/54.5/5 Jan 2015 899- i Nikon D5500
Nikon D7200« »HiRec84/1004.5/54/54.5/5 Mar 2015 1,199- i Nikon D7200
Sony A7 III« »HiRec89/1005/55/55/5 Feb 2018 1,999 i i Sony A7 III
Sony A99 II« »-85/1004.5/54.5/54.5/5 Sep 2016 3,199 i i Sony A99 II
Sony A6500« »HiRec85/1004.5/55/54.5/5 Oct 2016 1,399 i i Sony A6500
Sony RX10 III« »Rec84/1004.5/54.5/54.5/5 Mar 2016 1,499- i Sony RX10 III
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 RX10 II« »HiRec82/1004.5/54.5/54/5 Jun 2015 1,299- i Sony RX10 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 A6000« »Rec80/1004.5/55/55/5 Feb 2014 599- i Sony A6000
Sony A7R« »HiRec82/1004.5/55/55/5 Oct 2013 2,299- i Sony A7R

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. 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, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

 

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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting. If the camera you are interested in is not available, please send me an email, and I will try to locate and add the respective data to the application.

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