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Sony A7R III versus Canon 7D

The Sony Alpha A7R III and the Canon EOS 7D are two enthusiast cameras that were officially introduced, respectively, in October 2017 and September 2009. The A7R III is a mirrorless interchangeable lens camera, while the 7D is a DSLR. The cameras are based on a full frame (A7R III) and an APS-C (7D) sensor. The Sony has a resolution of 42.2 megapixel, whereas the Canon provides 17.9 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 A7R III vs Canon 7D

An illustration of the physical size and weight of the Sony A7R III and the Canon 7D is provided in the side-by-side display below. Three successive views from the front, the top, and the rear are shown. All width, height and depth dimensions are rounded to the nearest millimeter. You can also use the toggle button to switch to a percentage comparison if you prefer that the measures are being expressed in relative terms (in this case, the camera on the left – the A7R III – represents 100 percent across all the size and weight measures).

Snapsort Sony A7R III vs Canon 7D
Compare A7R III versus 7D top
Compare A7R III and 7D rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon 7D is notably larger (35 percent) than the Sony A7R III. Moreover, the 7D is markedly heavier (32 percent) than the A7R III. 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 FE Lens Catalog (A7R III) and the Canon EF Lens Catalog (7D). Mirrorless cameras, such as the Sony A7R III, have moreover the advantage that they have a relatively short flange to focal plane distance and can thus use many lenses from other systems via adapters.

Concerning battery life, the A7R III gets 650 shots out of its NP-FZ100 battery, while the 7D can take 800 images on a single charge of its LP-E6 power pack.

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 camera comparisons 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)
Sony A7R III» 5.0 in 3.8 in 2.9 in 22.9 oz 650 Y Oct 2017 3,199 i i
Canon 7D« 5.8 in 4.4 in 2.9 in 30.3 oz 800 Y Sep 2009 1,699- i
Canon G3 X« » 4.8 in 3.0 in 4.1 in 25.9 oz 300 Y Jun 2015 999 i i
Canon 7D II« » 5.9 in 4.4 in 3.1 in 32.1 oz 670 Y Sep 2014 1,799 i i
Canon 70D« » 5.5 in 4.1 in 3.1 in 26.6 oz 920 Y Jul 2013 1,199- i
Canon 60D« » 5.7 in 4.2 in 3.1 in 26.6 oz 1100 Y Aug 2010 1,399- i
Canon 50D« » 5.7 in 4.3 in 2.9 in 29.0 oz 800 Y Aug 2008 1,299- i
Hasselblad X1D« » 5.9 in 3.9 in 2.8 in 25.6 oz .. Y Jun 2016 8,995 i i
Sony A7 III« » 5.0 in 3.8 in 2.9 in 22.9 oz 610 Y Feb 2018 1,999 i i
Sony A9« » 5.0 in 3.8 in 2.5 in 23.7 oz 650 Y Apr 2017 4,499 i i
Sony A99 II« » 5.6 in 4.1 in 3.0 in 29.9 oz 490 Y Sep 2016 3,199 i i
Sony A6500« » 4.7 in 2.6 in 2.1 in 16.0 oz 350 Y Oct 2016 1,399 i i
Sony A7R II« » 5.0 in 3.8 in 2.4 in 22.0 oz 290 Y Jun 2015 3,199- i
Sony A7S II« » 5.0 in 3.8 in 2.4 in 22.1 oz 370 Y Sep 2015 2,999 i i
Sony A7 II« » 5.0 in 3.8 in 2.4 in 21.1 oz 350 Y Nov 2014 1,999- i
Sony A7R« » 5.0 in 3.7 in 1.9 in 16.4 oz 340 Y Oct 2013 2,299- i
Sony A99« » 5.8 in 4.4 in 3.1 in 28.6 oz 500 Y Sep 2012 2,799- i

The price is, of course, an important factor in any camera decision. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The 7D was launched at a markedly lower price (by 47 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

 

Sensor comparison: Sony A7R III vs Canon 7D

The size of the sensor inside a digital camera is one of the key determinants 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 associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Sony A7R III features a full frame sensor and the Canon 7D an APS-C sensor. The sensor area in the 7D is 61 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 1.6. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Sony A7R III and Canon 7D sensor measures

With 42.2MP, the A7R III offers a higher resolution than the 7D (17.9MP), but the A7R III nevertheless has larger individual pixels (pixel pitch of 4.52μm versus 4.31μm for the 7D) due to its larger sensor. Moreover, the A7R III is a somewhat more recent model (by 8 years and 1 month) than the 7D, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels. 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 7D, 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).

A7R III versus 7D 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 review, the A7R III provides substantially higher image quality than the 7D, with an overall score that is 34 points higher. This advantage is based on 4 bits higher color depth, 3 EV in additional dynamic range, and 2 stops in additional low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

Sensor Characteristics
  Camera Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Sony A7R III» Full Frame 42.2 7952 53044K/30p26.014.73523100
Canon 7D« APS-C 17.9 5184 34561080/30p22.011.785466
Canon G3 X« » 1-inch 20.0 5472 36481080/60p21.412.352163
Canon 7D II« » APS-C 20.0 5472 36481080/60p22.411.8108270
Canon 70D« » APS-C 20.0 5472 36481080/30p22.511.692668
Canon 60D« » APS-C 17.9 5184 34561080/30p22.211.581366
Canon 50D« » APS-C 15.1 4752 3168-21.811.469663
Hasselblad X1D« » Medium Format 51.3 8272 62001080/25p26.214.84489102
Sony A7 III« » Full Frame 24.0 6000 40004K/30p25.014.7373096
Sony A9« » Full Frame 24.0 6000 40004K/30p24.913.3351792
Sony A99 II« » Full Frame 42.2 7952 53044K/30p25.413.4231792
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 A7 II« » Full Frame 24.0 6000 40001080/60p24.913.6244990
Sony A7R« » Full Frame 36.2 7360 49121080/60p25.614.1274695
Sony A99« » Full Frame 24.0 6000 40001080/60p25.014.0155589

Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the A7R III provides a higher video resolution than the 7D. It can shoot video footage at 4K/30p, while the Canon is limited to 1080/30p.

 

Feature comparison: Sony A7R III vs Canon 7D

Beyond body and sensor, cameras can and do differ across a range of features. For example, the A7R III has an electronic viewfinder (3686k dots), while the 7D has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The adjacent table lists some of the other core features of the Sony A7R III and Canon 7D along with similar information for a selection of comparators. If you need more detail on the specs, you can find comprehensive listings, for example, in the dpreview camera hub.

Core Features
  Camera 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
Sony A7R III»3686 n 3.0 1440 tilting Y 8000 10.0 n Y
Canon 7D«optical Y 3.0 920 fixed n 8000 8.0 Y n
Canon G3 X« »- n 3.2 1620 tilting Y 2000 5.9 Y Y
Canon 7D II« »optical Y 3.0 1040 fixed n 8000 10.0 Y n
Canon 70D« »optical Y 3.0 1040 swivel Y 8000 7.0 Y n
Canon 60D« »optical Y 3.0 1040 swivel n 8000 5.3 Y n
Canon 50D« »optical Y 3.0 920 fixed n 8000 6.3 Y n
Hasselblad X1D« »2360 n 3.0 920 fixed Y 2000 2.3 n n
Sony A7 III« »2359 n 3.0 922 tilting Y 8000 10.0 n Y
Sony A9« »3686 n 3.0 1440 tilting Y 8000 20.0 n Y
Sony A99 II« »2400 Y 3.0 1229 full-flex n 8000 12.0 n Y
Sony A6500« »2300 n 3.0 922 tilting Y 4000 11.0 Y Y
Sony A7R II« »2400 n 3.0 1229 tilting n 8000 5.0 n Y
Sony A7S II« »2400 n 3.0 1229 tilting n 8000 5.0 n Y
Sony A7 II« »2400 n 3.0 1230 tilting n 8000 5.0 n Y
Sony A7R« »2400 n 3.0 1230 tilting n 8000 4.0 n n
Sony A99« »2359 Y 3.0 1229 full-flex n 8000 6.0 n Y

The A7R III is a current model that online retailers, such as amazon, will have in stock. In contrast, the 7D has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the 7D was succeeded by the Canon 7D Mark II.

Review summary: Sony A7R III vs Canon 7D

So what conclusions can be drawn? Is the Sony A7R III better than the Canon 7D or vice versa? The listing below highlights the relative strengths of the two models.

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Arguments in favor of the Sony Alpha A7R III:

  • More detail: Offers more megapixels (42.2 vs 17.9MP) with a 53% higher linear resolution.
  • 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 (34 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (4 bits more color depth).
  • More dynamic range: Captures a larger spectrum of light and dark details (3 EV of extra DR).
  • Better low-light sensitivity: Requires less light for good images (2 stops ISO advantage).
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/30p).
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • More detailed LCD: Has a higher resolution rear screen (1440k vs 920k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Faster burst: Shoots at higher frequency (10 vs 8 flaps/sec) to capture the decisive moment.
  • More compact: Is smaller (127x96mm vs 148x111mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 210g or 24 percent) and hence easier to carry around.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • Sharper images: Has hand-shake reducing image stabilization build-in.
  • More modern: Reflects 8 years and 1 month of technical progress since the 7D launch.

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Advantages of the Canon EOS 7D:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Easier setting verification: Has a control panel on top to check shooting parameters.
  • Longer lasting: Gets more shots (800 versus 650) out of a single battery charge.
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • More affordable: Was introduced into a lower priced category (47 percent cheaper at launch).
  • More heavily discounted: Has been around for much longer (launched in September 2009).

If the count of relative strengths (bullet points above) is taken as a measure, the A7R III is the clear winner of the match-up (18 : 7 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.

A7R III 18:07 7D

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the handling experience and imaging performance when actually working with the A7R III or the 7D. 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 expert reviews are important. The following table reports the overall rankings of the cameras as published by some of the major camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). The full reviews are available by clicking on the site logo in the table header.

Review scores
  Camera cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Sony A7R III»HiRec90/1004.5/55/55/5 Oct 2017 3,199 i i
Canon 7D«HiRec84/1004.5/55/54.5/5 Sep 2009 1,699- i
Canon G3 X« »Rec-4.5/53.5/54/5 Jun 2015 999 i i
Canon 7D II« »Rec84/1004/55/54.5/5 Sep 2014 1,799 i i
Canon 70D« »HiRec83/1004.5/54.5/55/5 Jul 2013 1,199- i
Canon 60D« »Rec79/1004/55/54.5/5 Aug 2010 1,399- i
Canon 50D« »HiRecHiRec4.5/55/54.5/5 Aug 2008 1,299- i
Hasselblad X1D« »rev---4/5 Jun 2016 8,995 i i
Sony A7 III« »HiRec89/1005/5-5/5 Feb 2018 1,999 i i
Sony A9« »HiRec89/1005/55/55/5 Apr 2017 4,499 i i
Sony A99 II« »-85/1004.5/54.5/54.5/5 Sep 2016 3,199 i i
Sony A6500« »HiRec85/1004.5/55/54.5/5 Oct 2016 1,399 i i
Sony A7R II« »HiRec90/1005/54.5/55/5 Jun 2015 3,199- i
Sony A7S II« »Rec-4.5/55/55/5 Sep 2015 2,999 i i
Sony A7 II« »Rec82/1004.5/55/55/5 Nov 2014 1,999- i
Sony A7R« »HiRec82/1004.5/55/55/5 Oct 2013 2,299- i
Sony A99« »-84/1004.5/5rev4.5/5 Sep 2012 2,799- i

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. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

 

Other camera comparisons

Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make a corresponding selection in the search boxes below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored. If you do not see the camera that you are looking for, please contact me, and I will try to update the database with the necessary infos.

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