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Canon G7 X Mark II versus Sony A7 II

The Canon PowerShot G7 X Mark II and the Sony Alpha A7 II are two digital cameras that were announced, respectively, in February 2016 and November 2014. The G7X Mark II is a fixed lens compact, while the A7 II is a mirrorless interchangeable lens camera. The cameras are based on an one-inch (G7X Mark II) and a full frame sensor. The Canon has a resolution of 20 megapixel, whereas the Sony provides 24 MP.

Body comparison

The physical size and weight of the Canon G7 X Mark II and the Sony A7 II are illustrated in the side-by-side display below. Three consecutive perspectives from the front, the top, and the back are presented. 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 side – the G7X Mark II – represents the basis for the calculations across all the size and weight measures).

Canon G7 X Mark II vs Sony A7 II front
G7X Mark II versus A7 II top view
G7X Mark II and A7 II rear side
Body view (G7X Mark II 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 A7 II is considerably larger (89 percent) than the Canon G7 X Mark II. It is noteworthy in this context that the A7 II is splash and dust-proof, while the G7X Mark II does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the G7X Mark II has a lens build in, whereas the A7 II 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 A7 II and their specifications in the Sony FE Lens Catalog.

Concerning battery life, the G7X Mark II gets 265 shots out of its NB-13L battery, while the A7 II can take 350 images on a single charge of its NP-FW50 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 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)
Canon G7 X Mark II (⇒ rgt) 106 mm 61 mm 42 mm 319 g 265 no 2016 699 latest check
Sony A7 II (⇒ lft) 127 mm 96 mm 60 mm 599 g 350 YES 2014 1,999discont. check
Canon G9 X Mark II (⇒ lft | rgt) 98 mm 58 mm 31 mm 206 g 235 no 2017 529 latest check
Canon SX730 (⇒ lft | rgt) 110 mm 64 mm 40 mm 300 g 250 no 2017 399 latest check
Canon M6 (⇒ lft | rgt) 112 mm 68 mm 45 mm 390 g 295 no 2017 779 latest check
Canon G9 X (⇒ lft | rgt) 98 mm 58 mm 31 mm 209 g 220 no 2015 529discont. check
Canon 750D (⇒ lft | rgt) 132 mm 101 mm 78 mm 555 g 440 no 2015 749discont. check
Canon 760D (⇒ lft | rgt) 132 mm 101 mm 78 mm 565 g 440 no 2015 849discont. check
Canon M3 (⇒ lft | rgt) 111 mm 68 mm 44 mm 366 g 250 no 2015 679discont. check
Canon G5 X (⇒ lft | rgt) 112 mm 76 mm 44 mm 353 g 210 no 2015 799 latest check
Canon G7 X (⇒ lft | rgt) 103 mm 60 mm 40 mm 304 g 210 no 2014 699discont. check
Fujifilm X70 (⇒ lft | rgt) 113 mm 64 mm 44 mm 340 g 330 no 2016 799 latest check
Olympus E-M1 II (⇒ lft | rgt) 134 mm 91 mm 67 mm 574 g 440 YES 2016 1,999 latest check
Sony A7 III (⇒ lft | rgt) 127 mm 96 mm 74 mm 650 g 610 YES 2018 1,999 latest check
Sony A7R II (⇒ lft | rgt) 127 mm 96 mm 60 mm 625 g 290 YES 2015 3,199discont. check
Sony A7 (⇒ lft | rgt) 127 mm 94 mm 48 mm 474 g 340 YES 2013 1,699discont. check
Sony A7R (⇒ lft | rgt) 127 mm 94 mm 48 mm 465 g 340 YES 2013 2,299discont. check

The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The G7X Mark II was launched at a lower price than the A7 II, 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 sensor inside a digital camera is one of the key determinants of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color depth than smaller pixel-units in a sensor of the same technological generation. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its 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 Canon G7 X Mark II features an one-inch sensor and the Sony A7 II a full frame sensor. The sensor area in the A7 II is 638 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.

Canon G7 X Mark II and Sony A7 II sensor measures
Sensor size

With 24MP, the A7 II offers a higher resolution than the G7X Mark II (20MP), but the A7 II nevertheless has larger individual pixels (pixel pitch of 5.97μm versus 2.41μm for the G7X Mark II) due to its larger sensor. However, the G7X Mark II is a somewhat more recent model (by 1 year and 2 months) than the A7 II, and its sensor might have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units.

G7X Mark II versus A7 II MP
Sensor resolution

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"). 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
(Megapixel)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Canon G7 X Mark II (⇒ rgt) 1-inch 20.0 5472 3648 1080/60p - - - -
Sony A7 II (⇒ lft) Full Frame 24.0 6000 4000 1080/60p 24.9 13.6 2449 90
Canon G9 X Mark II (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 21.9 12.5 522 65
Canon SX730 (⇒ lft | rgt) 1/2.3 20.2 5184 3888 1080/60p - - - -
Canon M6 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p .. .. .. ..
Canon G9 X (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 21.5 12.3 495 63
Canon 750D (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 22.7 12.0 919 71
Canon 760D (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/30p 22.6 12.0 915 70
Canon M3 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/30p 22.8 11.8 1169 72
Canon G5 X (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p - - - -
Canon G7 X (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 23.0 12.7 556 71
Fujifilm X70 (⇒ lft | rgt) APS-C 16.0 4896 3264 1080/60p - - - -
Olympus E-M1 II (⇒ lft | rgt) Four Thirds 20.2 5184 3888 4K/30p 23.7 12.8 1312 80
Sony A7 III (⇒ lft | rgt) Full Frame 24.0 6000 4000 4K/30p 25.0 14.7 3730 96
Sony A7R II (⇒ lft | rgt) Full Frame 42.2 7952 5304 4K/30p 26.0 13.9 3434 98
Sony A7 (⇒ lft | rgt) Full Frame 24.0 6000 4000 1080/60p 24.8 14.2 2248 90
Sony A7R (⇒ lft | rgt) Full Frame 36.2 7360 4912 1080/60p 25.6 14.1 2746 95

Many modern cameras cannot only take still pictures, but also record videos. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, and both provide the same movie specifications (1080/60p).

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the A7 II has an electronic viewfinder (2400k dots), which can be very helpful when shooting in bright sunlight. In contrast, the G7X Mark II relies on live view and the rear LCD for framing. The following table reports on some other key feature differences and similarities of the Canon G7 X Mark II, the Sony A7 II, and comparable cameras. 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
(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
Canon G7 X Mark II (⇒ rgt) no no 3.0 1040 tilting YES 2000 8.0 7 YES
Sony A7 II (⇒ lft) 2400 no 3.0 1230 tilting no 8000 5.0 no YES
Canon G9 X Mark II (⇒ lft | rgt) no no 3.0 1040 fixed YES 2000 8.2 6 YES
Canon SX730 (⇒ lft | rgt) no no 3.0 922 tilting no 3200 5.9 4 YES
Canon M6 (⇒ lft | rgt) no no 3.0 1040 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 750D (⇒ lft | rgt) optical no 3.0 1040 swivel YES 4000 5.0 12 no
Canon 760D (⇒ lft | rgt) optical YES 3.0 1040 swivel YES 4000 5.0 12 no
Canon M3 (⇒ lft | rgt) no no 3.0 1040 tilting YES 4000 4.2 5 no
Canon G5 X (⇒ lft | rgt) 2360 no 3.0 1040 swivel YES 2000 5.9 7 YES
Canon G7 X (⇒ lft | rgt) no no 3.0 1040 tilting YES 2000 6.5 7 YES
Fujifilm X70 (⇒ lft | rgt) no no 3.0 1040 tilting YES 4000 8.0 7.9 ..
Olympus E-M1 II (⇒ lft | rgt) 2360 no 3.0 1037 swivel YES 8000 18.0 no YES
Sony A7 III (⇒ lft | rgt) 2359 no 3.0 922 tilting YES 8000 10 no YES
Sony A7R II (⇒ lft | rgt) 2400 no 3.0 1229 tilting no 8000 5.0 no YES
Sony A7 (⇒ lft | rgt) 2400 no 3.0 1230 tilting no 8000 5.0 no no
Sony A7R (⇒ lft | rgt) 2400 no 3.0 1230 tilting no 8000 4.0 no no

The G7X Mark II is a current model that online retailers, such as amazon, will have in stock. In contrast, the A7 II has been discontinued (but it can be found pre-owned on ebay). As a replacement in the same line of cameras, the A7 II was succeeded by the Sony A7 III.

Summary

So what conclusions can be drawn? Is there a clear favorite between the Canon G7 X Mark II and the Canon G7 X Mark II? Below is a summary of the relative strengths of each of the two contestants.


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Reasons to prefer the Canon PowerShot G7 X Mark II:

  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Faster burst: Shoots at higher frequency (8 vs 5 flaps/sec) to capture the decisive moment.
  • Ready to shoot: Has a lens build-in, whereas the A7 II requires a separate lens.
  • More compact: Is smaller (106x61mm 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 A7 II).
  • 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 modern: Is somewhat more recent (announced 1 year and 2 months after the A7 II).

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Arguments in favor of the Sony Alpha A7 II:

  • More detail: Has more megapixels (24 vs 20MP), which boosts linear resolution by 10%.
  • Better low-light imaging: Features bigger pixels on a larger sensor for better high-ISO images.
  • Easier framing: Has an electronic viewfinder for image framing and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1230k vs 1040k dots).
  • 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 (350 versus 265) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • More heavily discounted: Has been on the market for longer (launched in November 2014).

If the count of relative strengths (bullet points above) is taken as a measure, the A7 II comes out slightly ahead of the G7X Mark II (9 : 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.

G7X Mark II 08:09 A7 II

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the G7X Mark II or the A7 II handle or perform in practice. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased. This is why hands-on reviews by experts are important. The following table reports the overall rankings of the cameras as published by some of the major 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)
Canon G7 X Mark II (⇒ rgt) HiRec 81/100 Silver 4.5/5 4/5 4.5/5 2016 699 latest check
Sony A7 II (⇒ lft) Rec 82/100 Silver 4.5/5 5/5 5/5 2014 1,999discont. check
Canon G9 X Mark II (⇒ lft | rgt) .. 75/100 4.5/5 4.5/5 4.5/5 2017 529 latest check
Canon SX730 (⇒ lft | rgt) Rec - 4/5 - 4/5 2017 399 latest check
Canon M6 (⇒ lft | rgt) - 80/100 Silver 4/5 4.5/5 4/5 2017 779 latest check
Canon G9 X (⇒ lft | rgt) HiRec - 4.5/5 4/5 4.5/5 2015 529discont. check
Canon 750D (⇒ lft | rgt) - 75/100 4.5/5 4.5/5 4.5/5 2015 749discont. check
Canon 760D (⇒ lft | rgt) Rec 77/100 Silver 4.5/5 4.5/5 4.5/5 2015 849discont. check
Canon M3 (⇒ lft | rgt) reviewed 75/100 4.5/5 4.5/5 4/5 2015 679discont. check
Canon G5 X (⇒ lft | rgt) HiRec 78/100 Silver 4.5/5 4/5 4.5/5 2015 799 latest check
Canon G7 X (⇒ lft | rgt) HiRec 77/100 Silver 4.5/5 3.5/5 4.5/5 2014 699discont. check
Fujifilm X70 (⇒ lft | rgt) - 76/100 4.5/5 4/5 4.5/5 2016 799 latest check
Olympus E-M1 II (⇒ lft | rgt) HiRec 85/100 Gold 4.5/5 5/5 4.5/5 2016 1,999 latest check
Sony A7 III (⇒ lft | rgt) HiRec .. .. .. 5/5 2018 1,999 latest check
Sony A7R II (⇒ lft | rgt) HiRec 90/100 Gold 5/5 4.5/5 5/5 2015 3,199discont. check
Sony A7 (⇒ lft | rgt) HiRec 80/100 Silver 5/5 4.5/5 5/5 2013 1,699discont. check
Sony A7R (⇒ lft | rgt) HiRec 82/100 Gold 4.5/5 5/5 5/5 2013 2,299discont. check

The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

Other comparisons

In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. An an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool. If you cannot find the camera you are interested in, please contact me, and I will try to update the database with the necessary infos.

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