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Canon 5D Mark IV versus Sony A7R III

The Canon EOS 5D Mark IV and the Sony Alpha A7R III are two digital cameras that were officially introduced, respectively, in August 2016 and October 2017. The 5D Mark IV is a DSLR, while the A7R III is a mirrorless interchangeable lens camera. Both cameras are equipped with a full frame sensor. The Canon has a resolution of 30.1 megapixel, whereas the Sony 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: Canon 5D Mark IV vs Sony A7R III

The side-by-side display below illustrates the physical size and weight of the Canon 5D Mark IV and the Sony A7R III. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth dimensions are rounded to the nearest millimeter. You can also toggle the display 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 5D Mark IV – represents 100 percent across all the size and weight measures).

Snapsort Canon 5D Mark IV vs Sony A7R III
Compare 5D Mark IV versus A7R III top
Compare 5D Mark IV 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 smaller (30 percent) than the Canon 5D Mark IV. Moreover, the A7R III is markedly lighter (27 percent) than the 5D Mark IV. 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. Both cameras have similarly sized sensors, but DSLRs have a larger flange-to-focal plane distance than mirrorless cameras, which imposes contraints on the optical engineering process and generally leads to bigger and heavier lenses. You can find an overview of optics for the two cameras in the Canon EF Lens Catalog (5D Mark IV) and the Sony FE Lens Catalog (A7R III). Mirrorless cameras, such as the A7R III, have moreover the advantage that they can use many lenses from other systems via adapters, as they have a relatively short flange to focal plane distance.

Concerning battery life, the 5D Mark IV gets 900 shots out of its LP-E6N 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 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)
Canon 5D Mark IV» 5.9 in 4.6 in 3.0 in 31.4 oz 900 Y Aug 2016 3,499 i i
Sony A7R III« 5.0 in 3.8 in 2.9 in 22.9 oz 650 Y Oct 2017 3,199 i i
Canon 6D Mark II« » 5.7 in 4.4 in 3.0 in 27.0 oz 1200 Y Jun 2017 1,999 i i
Canon 1D X Mark II« » 6.2 in 6.6 in 3.3 in 54.0 oz 1210 Y Feb 2016 5,999 i i
Canon 5DS R« » 6.0 in 4.6 in 3.0 in 32.8 oz 700 Y Feb 2015 3,699 i i
Canon 5DS« » 6.0 in 4.6 in 3.0 in 32.8 oz 700 Y Feb 2015 3,699 i i
Canon 5D Mark III« » 6.0 in 4.6 in 3.0 in 33.5 oz 950 Y Mar 2012 3,499- i
Canon 5D Mark II« » 6.0 in 4.5 in 3.0 in 30.0 oz 850 Y Sep 2008 3,499- i
Canon 5D« » 6.0 in 4.4 in 3.0 in 31.6 oz 400 Y Aug 2005 3,299- i
Nikon D850« » 5.7 in 4.9 in 3.1 in 35.5 oz 1840 Y Jul 2017 3,299 i i
Nikon D800« » 5.7 in 4.8 in 3.2 in 35.3 oz 900 Y Feb 2012 2,999- i
Nikon D800E« » 5.7 in 4.8 in 3.2 in 35.3 oz 900 Y Feb 2012 3,299- 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 A99 II« » 5.6 in 4.1 in 3.0 in 29.9 oz 490 Y Sep 2016 3,199 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 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

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 A7R III was somewhat cheaper (by 9 percent) than the 5D Mark IV at launch, but both cameras fall into the same price category. 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: Canon 5D Mark IV vs Sony A7R III

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. 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 tend to be associated with larger, more expensive camera bodies and lenses.

Both cameras under consideration feature a full frame sensor, but their sensors differ slightly in size. They nevertheless have the same format factor of 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Canon 5D Mark IV and Sony A7R III sensor measures

Despite having a slightly smaller sensor, the A7R III offers a higher resolution of 42.2 megapixel, compared with 30.1 MP of the 5D Mark IV. This megapixel advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 4.52μm versus 5.36μm for the 5D Mark IV). However, it should be noted that the A7R III is a somewhat more recent model (by 1 year and 2 months) than the 5D Mark IV, and its sensor might have benefitted from technological advances during this time that partly offset its pixel-size disadvantage. 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 5D Mark IV, 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).

5D Mark IV versus A7R III MP

For most 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 III has a markedly higher DXO score than the 5D Mark IV (overall score 9 points higher), which will translate into better image quality. The advantage is based on 1.2 bits higher color depth, 1.1 EV in additional dynamic range, and 0.2 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
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Canon 5D Mark IV» Full Frame 30.1 6720 44804K/30p24.813.6299591
Sony A7R III« Full Frame 42.2 7952 53044K/30p26.014.73523100
Canon 6D Mark II« » Full Frame 26.0 6240 41601080/60p24.411.9286285
Canon 1D X Mark II« » Full Frame 20.0 5472 36484K/60p24.113.5320788
Canon 5DS R« » Full Frame 50.3 8688 57921080/60p24.612.4230886
Canon 5DS« » Full Frame 50.3 8688 57921080/60p24.712.4238187
Canon 5D Mark III« » Full Frame 22.1 5760 38401080/30p24.011.7229381
Canon 5D Mark II« » Full Frame 21.0 5616 37441080/30p23.711.9181579
Canon 5D« » Full Frame 12.7 4368 2912-22.911.1136871
Nikon D850« » Full Frame 45.4 8256 55044K/30p26.414.82660100
Nikon D800« » Full Frame 36.2 7360 49121080/30p25.314.4285395
Nikon D800E« » Full Frame 36.2 7360 49121080/30p25.614.3297996
Sony A7 III« » Full Frame 24.0 6000 40004K/30p25.014.7373096
Sony A99 II« » Full Frame 42.2 7952 53044K/30p25.413.4231792
Sony A7R II« » Full Frame 42.2 7952 53044K/30p26.013.9343498
Sony A7 II« » Full Frame 24.0 6000 40001080/60p24.913.6244990
Sony A7R« » Full Frame 36.2 7360 49121080/60p25.614.1274695

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 (4K/30p).

 

Feature comparison: Canon 5D Mark IV vs Sony A7R III

Apart from 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 5D Mark IV 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 Canon 5D Mark IV and Sony A7R III along with similar information for a selection of comparators. The full specs-sheets can be found in the camera manual or, 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
Canon 5D Mark IV»optical Y 3.2 1620 fixed Y 8000 7.0 n n
Sony A7R III«3686 n 3.0 1440 tilting Y 8000 10.0 n Y
Canon 6D Mark II« »optical Y 3.0 1040 swivel Y 4000 6.5 n n
Canon 1D X Mark II« »optical Y 3.2 1620 fixed Y 8000 16.0 n n
Canon 5DS R« »optical Y 3.2 1040 fixed n 8000 5.0 n n
Canon 5DS« »optical Y 3.2 1040 fixed n 8000 5.0 n n
Canon 5D Mark III« »optical Y 3.2 1040 fixed n 8000 6.0 n n
Canon 5D Mark II« »optical Y 3.0 920 fixed n 8000 3.9 n n
Canon 5D« »optical Y 2.5 230 fixed n 8000 3.0 n n
Nikon D850« »optical Y 3.2 2359 tilting Y 8000 9.0 n n
Nikon D800« »optical Y 3.2 921 fixed n 8000 4.0 Y n
Nikon D800E« »optical Y 3.2 921 fixed n 8000 4.0 Y n
Sony A7 III« »2359 n 3.0 922 tilting Y 8000 10.0 n Y
Sony A99 II« »2400 Y 3.0 1229 full-flex n 8000 12.0 n Y
Sony A7R 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

Both the 5D Mark IV 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 5D Mark IV replaced the earlier Canon 5D Mark III, while the A7R III followed on from the Sony A7R II.

Review summary: Canon 5D Mark IV vs Sony A7R III

So how do things add up? Is there a clear favorite between the Canon 5D Mark IV and the Sony A7R III? A synthesis of the relative strong points of each of the models is listed below.

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Advantages of the Canon EOS 5D Mark IV:

  • 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 an LCD display on top to control shooting parameters.
  • Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1620k vs 1440k dots).
  • Longer lasting: Can take more shots (900 versus 650) on a single battery charge.
  • More heavily discounted: Has been on the market for longer (launched in August 2016).

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Arguments in favor of the Sony Alpha A7R III:

  • More detail: Has more megapixels (42.2 vs 30.1MP), which boosts linear resolution by 18%.
  • 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 markedly higher (9 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (1.2 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (1.1 EV of extra DR).
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Faster burst: Shoots at higher frequency (10 vs 7 flaps/sec) to capture the decisive moment.
  • More compact: Is smaller (127x96mm vs 151x116mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 240g or 27 percent) and is thus easier to take along.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • Sharper images: Has stabilization technology build-in to reduce the impact of hand-shake.
  • More modern: Was introduced somewhat (1 year and 2 months) 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 (14 : 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.

5D Mark IV 07:14 A7R III

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the 5D Mark IV 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 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). You can find the full text of the reviews 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)
Canon 5D Mark IV»HiRec87/1004.5/55/54.5/5 Aug 2016 3,499 i i
Sony A7R III«HiRec90/1004.5/55/55/5 Oct 2017 3,199 i i
Canon 6D Mark II« »Rec80/1004.5/54/54/5 Jun 2017 1,999 i i
Canon 1D X Mark II« »-89/1004.5/55/54.5/5 Feb 2016 5,999 i i
Canon 5DS R« »Rec83/1005/55/54.5/5 Feb 2015 3,699 i i
Canon 5DS« »Rec83/1004.5/55/54.5/5 Feb 2015 3,699 i i
Canon 5D Mark III« »HiRec82/1004.5/55/54.5/5 Mar 2012 3,499- i
Canon 5D Mark II« »91/10079/1004/55/5- Sep 2008 3,499- i
Canon 5D« »88/100HiRecrevrev- Aug 2005 3,299- i
Nikon D850« »HiRec89/1004.5/55/55/5 Jul 2017 3,299 i i
Nikon D800« »HiRec82/1005/55/55/5 Feb 2012 2,999- i
Nikon D800E« »-84/1005/54.5/55/5 Feb 2012 3,299- i
Sony A7 III« »HiRec89/1005/5-5/5 Feb 2018 1,999 i i
Sony A99 II« »-85/1004.5/54.5/54.5/5 Sep 2016 3,199 i i
Sony A7R II« »HiRec90/1005/54.5/55/5 Jun 2015 3,199- 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

The review scores listed above should be treated with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date 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 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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