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Canon 6D Mark II versus Sony A9

The Canon EOS 6D Mark II and the Sony Alpha A9 are two digital cameras that were revealed to the public, respectively, in June 2017 and April 2017. The 6D Mark II is a DSLR, while the A9 is a mirrorless interchangeable lens camera. Both cameras are equipped with a full frame sensor. The Canon has a resolution of 26 megapixel, whereas the Sony provides 24 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 6D Mark II vs Sony A9

An illustration of the physical size and weight of the Canon 6D Mark II and the Sony A9 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. 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 6D Mark II – represents the basis or 100 percent across all the size and weight measures).

Snapsort Canon 6D Mark II vs Sony A9
Compare 6D Mark II versus A9 top
Compare 6D Mark II and A9 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A9 is notably smaller (24 percent) than the Canon 6D Mark II. Moreover, the A9 is markedly lighter (12 percent) than the 6D Mark II. 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 (6D Mark II) and the Sony FE Lens Catalog (A9). Mirrorless cameras, such as the A9, 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 6D Mark II gets 1200 shots out of its LP-E6N battery, while the A9 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 6D Mark II» 5.7 in 4.4 in 3.0 in 27.0 oz 1200 Y Jun 2017 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
Canon 5D Mark IV« » 5.9 in 4.6 in 3.0 in 31.4 oz 900 Y Aug 2016 3,499 i i
Canon 80D« » 5.5 in 4.1 in 3.1 in 25.8 oz 960 Y Feb 2016 1,199 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 6D« » 5.7 in 4.4 in 2.8 in 27.2 oz 1090 Y Sep 2012 2,099- 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
Nikon D500« » 5.8 in 4.5 in 3.2 in 30.3 oz 1240 Y Jan 2016 1,999 i i
Nikon D750« » 5.6 in 4.4 in 3.1 in 26.5 oz 1230 Y Sep 2014 2,299 i i
Nikon D610« » 5.6 in 4.4 in 3.2 in 30.0 oz 900 Y Oct 2013 1,999 i i
Nikon D600« » 5.6 in 4.4 in 3.2 in 30.0 oz 900 Y Sep 2012 2,099- 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 A7R III« » 5.0 in 3.8 in 2.9 in 22.9 oz 650 Y Oct 2017 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 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

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 6D Mark II was launched at a markedly lower price (by 56 percent) than the A9, 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: Canon 6D Mark II vs Sony A9

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 generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have 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 more expensive and lead to bigger and heavier cameras and lenses.

Both cameras under consideration feature a full frame sensor, but their sensors differ slightly in size. The sensor area in the A9 is 2 percent smaller. 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 6D Mark II and Sony A9 sensor measures

With 26MP, the 6D Mark II offers a slightly higher resolution than the A9 (24MP), but the 6D Mark II has smaller individual pixels (pixel pitch of 5.76μm versus 5.94μm for the A9). It is noteworthy in this context that the two cameras were released in close succession, so that their sensors are from the same technological generation.

6D Mark II versus A9 MP

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 A9 has a markedly higher DXO score than the 6D Mark II (overall score 7 points higher), which will translate into better image quality. The advantage is based on 0.5 bits higher color depth, 1.4 EV in additional dynamic range, and 0.3 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 Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Canon 6D Mark II» Full Frame 26.0 6240 41601080/60p24.411.9286285
Sony A9« Full Frame 24.0 6000 40004K/30p24.913.3351792
Canon 5D Mark IV« » Full Frame 30.1 6720 44804K/30p24.813.6299591
Canon 80D« » APS-C 24.0 6000 40001080/60p23.613.2113579
Canon 1D X Mark II« » Full Frame 20.0 5472 36484K/60p24.113.5320788
Canon 6D« » Full Frame 20.0 5472 36481080/30p23.812.1234082
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
Nikon D500« » APS-C 20.7 5568 37124K/30p24.014.0132483
Nikon D750« » Full Frame 24.2 6016 40161080/60p24.814.5295693
Nikon D610« » Full Frame 24.2 6016 40161080/30p25.114.4292594
Nikon D600« » Full Frame 24.2 6016 40161080/30p25.114.2298094
Sony A7 III« » Full Frame 24.0 6000 40004K/30p25.014.7373096
Sony A7R III« » Full Frame 42.2 7952 53044K/30p26.014.73523100
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

Many modern cameras are not only capable of taking still images, but can also record movies. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the A9 provides a better video resolution than the 6D Mark II. It can shoot movie footage at 4K/30p, while the Canon is limited to 1080/60p.

 

Feature comparison: Canon 6D Mark II vs Sony A9

Beyond body and sensor, cameras can and do differ across a range of features. For example, the A9 has an electronic viewfinder (3686k dots), while the 6D Mark II 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 6D Mark II and Sony A9 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
Canon 6D Mark II»optical Y 3.0 1040 swivel Y 4000 6.5 n n
Sony A9«3686 n 3.0 1440 tilting Y 8000 20.0 n Y
Canon 5D Mark IV« »optical Y 3.2 1620 fixed Y 8000 7.0 n n
Canon 80D« »optical Y 3.0 1040 swivel Y 8000 7.0 Y n
Canon 1D X Mark II« »optical Y 3.2 1620 fixed Y 8000 16.0 n n
Canon 6D« »optical Y 3.0 1040 fixed n 4000 4.5 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
Nikon D500« »optical Y 3.2 2359 tilting Y 8000 10.0 n n
Nikon D750« »optical Y 3.2 1229 tilting n 4000 6.0 Y n
Nikon D610« »optical Y 3.2 921 fixed n 4000 6.0 Y n
Nikon D600« »optical Y 3.0 921 fixed n 4000 5.5 Y n
Sony A7 III« »2359 n 3.0 922 tilting Y 8000 10.0 n Y
Sony A7R III« »3686 n 3.0 1440 tilting Y 8000 10.0 n 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

Both the 6D Mark II and the A9 are current models that good online retailers will have in stock. You can check the latest prices, for example, at amazon. The 6D Mark II replaced the earlier Canon 6D, while the A9 does not have a direct predecessor.

Review summary: Canon 6D Mark II vs Sony A9

So what is the bottom line? Which of the two cameras – the Canon 6D Mark II or the Sony A9 – has the upper hand? Below is a summary of the relative strengths of each of the two contestants.

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Advantages of the Canon EOS 6D Mark II:

  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Easier setting verification: Has an LCD display on top to control shooting parameters.
  • More flexible LCD: Has swivel screen for odd-angle shots in portrait or landscape orientation.
  • Longer lasting: Can take more shots (1200 versus 650) on a single battery charge.
  • More affordable: Was introduced into a lower priced category (56 percent cheaper at launch).

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Arguments in favor of the Sony Alpha A9:

  • Better image quality: Scores markedly higher (7 points) in the DXO overall evaluation.
  • More dynamic range: Captures a broader range of light and dark details (1.4 EV of extra DR).
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • More detailed LCD: Has a higher resolution rear screen (1440k vs 1040k dots).
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
  • Faster burst: Shoots at higher frequency (20 vs 6.5 flaps/sec) to capture the decisive moment.
  • More compact: Is smaller (127x96mm vs 144x111mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 92g or 12 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.

If the count of individual advantages (bullet points above) is taken as a guide, the A9 is the clear winner of the contest (11 : 5 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.

6D Mark II 05:11 A9

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains partial and cannot reveal, for example, the handling experience and imaging performance when actually working with the 6D Mark II or the A9. 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 where reviews by experts come in. The table below summarizes the assessments of some of the best known 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)
Canon 6D Mark II»Rec80/1004.5/54/54/5 Jun 2017 1,999 i i
Sony A9«HiRec89/1005/55/55/5 Apr 2017 4,499 i i
Canon 5D Mark IV« »HiRec87/1004.5/55/54.5/5 Aug 2016 3,499 i i
Canon 80D« »HiRec84/1004.5/54.5/54.5/5 Feb 2016 1,199 i i
Canon 1D X Mark II« »-89/1004.5/55/54.5/5 Feb 2016 5,999 i i
Canon 6D« »HiRec83/1004.5/54.5/54.5/5 Sep 2012 2,099- 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
Nikon D500« »HiRec91/1004.5/55/55/5 Jan 2016 1,999 i i
Nikon D750« »HiRec90/1004.5/55/54.5/5 Sep 2014 2,299 i i
Nikon D610« »HiRec87/1004.5/54.5/54.5/5 Oct 2013 1,999 i i
Nikon D600« »HiRec87/1005/54.5/54.5/5 Sep 2012 2,099- i
Sony A7 III« »HiRec89/1005/5-5/5 Feb 2018 1,999 i i
Sony A7R III« »HiRec90/1004.5/55/55/5 Oct 2017 3,199 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

The review scores listed above should be treated with care, 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 rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. 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? 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 cannot find the camera you are interested in, please send me an email, and I will try to add information on that model to the database.

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