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Canon G7 X Mark II versus Pentax K-70

The Canon PowerShot G7 X Mark II and the Pentax K-70 are two digital cameras that were officially introduced, respectively, in February 2016 and June 2016. The G7X Mark II is a fixed lens compact, while the K-70 is a DSLR. The cameras are based on an one-inch (G7X Mark II) and an APS-C (K-70) sensor. The Canon has a resolution of 20 megapixel, whereas the Pentax 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 G7 X Mark II vs Pentax K-70

The physical size and weight of the Canon G7 X Mark II and the Pentax K-70 are illustrated in the side-by-side display below. 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. 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 G7X Mark II – represents the basis or 100 percent across all the size and weight measures).

Compare Canon G7 X Mark II vs Pentax K-70
Compare G7X Mark II versus K-70 top
Compare G7X Mark II and K-70 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax K-70 is considerably larger (81 percent) than the Canon G7 X Mark II. It is noteworthy in this context that the K-70 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 K-70 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup.

Concerning battery life, the G7X Mark II gets 265 shots out of its NB-13L battery, while the K-70 can take 410 images on a single charge of its D-LI109 power pack.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. 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)
Camera
Model
Canon G7 X Mark II» 4.2 in 2.4 in 1.7 in 11.3 oz 265 n Feb 2016 699 i i Canon G7 X Mark II
Pentax K-70« 5.0 in 3.7 in 2.9 in 24.3 oz 410 Y Jun 2016 649 i i Pentax K-70
Canon SX730« » 4.3 in 2.5 in 1.6 in 10.6 oz 250 n Apr 2017 399- i Canon SX730
Canon M100« » 4.3 in 2.6 in 1.4 in 10.7 oz 295 n Aug 2017 499 i i Canon M100
Canon M6« » 4.4 in 2.7 in 1.8 in 13.8 oz 295 n Feb 2017 779 i i Canon M6
Canon T7i« » 5.2 in 3.9 in 3.0 in 18.8 oz 600 n Feb 2017 749 i i Canon T7i
Canon G9 X« » 3.9 in 2.3 in 1.2 in 7.4 oz 220 n Oct 2015 529- i Canon G9 X
Canon M3« » 4.4 in 2.7 in 1.7 in 12.9 oz 250 n Feb 2015 679- i Canon M3
Canon T6i« » 5.2 in 4.0 in 3.1 in 19.6 oz 440 n Feb 2015 749- i Canon T6i
Canon T6s« » 5.2 in 4.0 in 3.1 in 19.9 oz 440 n Feb 2015 849- i Canon T6s
Canon G5 X« » 4.4 in 3.0 in 1.7 in 12.5 oz 210 n Oct 2015 799 i i Canon G5 X
Canon G7 X« » 4.1 in 2.4 in 1.6 in 10.7 oz 210 n Sep 2014 699- i Canon G7 X
Olympus E-M1 II« » 5.3 in 3.6 in 2.6 in 20.2 oz 440 Y Sep 2016 1,999 i i Olympus E-M1 II
Panasonic GH5« » 5.5 in 3.9 in 3.4 in 25.6 oz 410 Y Jan 2017 1,999 i i Panasonic GH5
Pentax KP« » 5.2 in 4.0 in 3.0 in 24.8 oz 390 Y Jan 2017 1,099 i i Pentax KP
Pentax K-3 II« » 5.2 in 3.9 in 3.0 in 28.2 oz 720 Y Apr 2015 1,099 i i Pentax K-3 II
Pentax K-3« » 5.2 in 3.9 in 3.0 in 28.2 oz 560 Y Oct 2013 1,299- i Pentax K-3

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. 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: Canon G7 X Mark II vs Pentax K-70

The size of the sensor inside a digital camera is one of the key determinants 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. 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 are more costly to manufacture and tend to 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 Pentax K-70 an APS-C sensor. The sensor area in the K-70 is 216 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.7 and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Canon G7 X Mark II and Pentax K-70 sensor measures

With 24MP, the K-70 offers a higher resolution than the G7X Mark II (20MP), but the K-70 nevertheless has larger individual pixels (pixel pitch of 3.91μm versus 2.41μm for the G7X Mark II) due to its larger sensor. Moreover, the K-70 is a somewhat more recent model (by 3 months) than the G7X Mark II, 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 K-70 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

Unlike the G7X Mark II, the K-70 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).

G7X Mark II versus K-70 MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. 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
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Canon G7 X Mark II» 1-inch 20.0 5472 36481080/60p----Canon G7 X Mark II
Pentax K-70« APS-C 24.0 6000 40001080/60i----Pentax K-70
Canon SX730« » 1/2.3 20.2 5184 38881080/60p----Canon SX730
Canon M100« » APS-C 24.0 6000 40001080/60p23.512.9127278Canon M100
Canon M6« » APS-C 24.0 6000 40001080/60p----Canon M6
Canon T7i« » APS-C 24.0 6000 40001080/60p----Canon T7i
Canon G9 X« » 1-inch 20.0 5472 36481080/60p21.512.349563Canon G9 X
Canon M3« » APS-C 24.0 6000 40001080/30p22.811.8116972Canon M3
Canon T6i« » APS-C 24.0 6000 40001080/60p22.712.091971Canon T6i
Canon T6s« » APS-C 24.0 6000 40001080/30p22.612.091570Canon T6s
Canon G5 X« » 1-inch 20.0 5472 36481080/60p----Canon G5 X
Canon G7 X« » 1-inch 20.0 5472 36481080/60p23.012.755671Canon G7 X
Olympus E-M1 II« » Four Thirds 20.2 5184 38884K/30p23.712.8131280Olympus E-M1 II
Panasonic GH5« » Four Thirds 20.2 5184 38884K/60p23.913.080777Panasonic GH5
Pentax KP« » APS-C 24.1 6016 40001080/60i----Pentax KP
Pentax K-3 II« » APS-C 24.1 6016 40001080/60i23.613.6110680Pentax K-3 II
Pentax K-3« » APS-C 24.1 6016 40001080/60i23.713.4121680Pentax K-3

Many modern cameras are not only capable of taking still images, but also of capturing video footage. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the G7X Mark II provides a higher frame rate than the K-70. It can shoot video footage at 1080/60p, while the Pentax is limited to 1080/60i.

 

Feature comparison: Canon G7 X Mark II vs Pentax K-70

Beyond body and sensor, cameras can and do differ across a range of features. For example, the K-70 has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the G7X Mark II relies on live view and the rear LCD for framing. The table below summarizes some of the other core capabilities of the Canon G7 X Mark II and Pentax K-70 in connection with corresponding information for a sample of similar cameras. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.

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
Canon G7 X Mark II»- n 3.0 1040 tilting Y 2000 8.0 Y Y Canon G7 X Mark II
Pentax K-70«optical n 3.0 921 swivel n 6000 6.0 Y Y Pentax K-70
Canon SX730« »- n 3.0 922 tilting n 3200 5.9 Y Y Canon SX730
Canon M100« »- n 3.0 1040 tilting Y 4000 6.1 Y n Canon M100
Canon M6« »- n 3.0 1040 tilting Y 4000 9.0 Y n Canon M6
Canon T7i« »optical n 3.0 1040 swivel Y 4000 6.0 Y n Canon T7i
Canon G9 X« »- n 3.0 1040 fixed Y 2000 6.0 Y Y Canon G9 X
Canon M3« »- n 3.0 1040 tilting Y 4000 4.2 Y n Canon M3
Canon T6i« »optical n 3.0 1040 swivel Y 4000 5.0 Y n Canon T6i
Canon T6s« »optical Y 3.0 1040 swivel Y 4000 5.0 Y n Canon T6s
Canon G5 X« »2360 n 3.0 1040 swivel Y 2000 5.9 Y Y Canon G5 X
Canon G7 X« »- n 3.0 1040 tilting Y 2000 6.5 Y Y Canon G7 X
Olympus E-M1 II« »2360 n 3.0 1037 swivel Y 8000 18.0 n Y Olympus E-M1 II
Panasonic GH5« »3680 n 3.2 1620 swivel Y 8000 12.0 n Y Panasonic GH5
Pentax KP« »optical n 3.0 921 tilting n 6000 7.0 Y Y Pentax KP
Pentax K-3 II« »optical Y 3.2 1037 fixed n 8000 8.3 n Y Pentax K-3 II
Pentax K-3« »optical Y 3.2 1037 fixed n 8000 8.3 Y Y Pentax K-3

Both the G7X Mark II and the K-70 are current models that good online retailers will have in stock. You can check the latest prices, for example, at amazon. The G7X Mark II replaced the earlier Canon G7 X, while the K-70 followed on from the Pentax K-50.

Review summary: Canon G7 X Mark II vs Pentax K-70

So how do things add up? Is there a clear favorite between the Canon G7 X Mark II and the Pentax K-70? A synthesis of the relative strong points of each of the models is listed below.

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Advantages of the Canon PowerShot G7 X Mark II:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better video: Provides higher movie framerates (1080/60p versus 1080/60i).
  • More detailed LCD: Has a higher resolution rear screen (1040k vs 921k dots).
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Faster burst: Shoots at higher frequency (8 vs 6 flaps/sec) to capture the decisive moment.
  • Ready to shoot: Comes with a build-in lens, while the K-70 requires a separate lens.
  • More compact: Is smaller (106x61mm vs 126x93mm) and thus needs less room in the bag.
  • Less heavy: Is lighter even though it comes with a build-in lens (unlike the K-70).
  • More heavily discounted: Has been on the market for longer (launched in February 2016).

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Reasons to prefer the Pentax K-70:

  • More detail: Has more megapixels (24 vs 20MP), which boosts linear resolution by 10%.
  • 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 low-light imaging: Features bigger pixels on a larger sensor for better high-ISO images.
  • Easier framing: Has an optical viewfinder for image framing and settings control.
  • More flexible LCD: Has swivel screen for odd-angle shots in portrait or landscape orientation.
  • Faster shutter: Has higher mechanical shutter speed (6000/sec vs 2000/sec) to freeze action.
  • More flexible: Makes it possible to change lenses and thus to use specialty optics.
  • Longer lasting: Gets more shots (410 versus 265) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • More modern: Was introduced somewhat (3 months) more recently.

If the count of relative strengths (bullet points above) is taken as a measure, the K-70 emerges as the winner of the match-up (11 : 9 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding on a new camera.

G7X Mark II 09:11 K-70

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 G7X Mark II and the K-70 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). The detailed reviews can be accessed 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
Canon G7 X Mark II»HiRec81/1004.5/54/54.5/5 Feb 2016 699 i i Canon G7 X Mark II
Pentax K-70«-79/1004.5/54/54.5/5 Jun 2016 649 i i Pentax K-70
Canon SX730« »Rec-4/5-4/5 Apr 2017 399- i Canon SX730
Canon M100« »Rec-4/5-3.5/5 Aug 2017 499 i i Canon M100
Canon M6« »-80/1004/54.5/54/5 Feb 2017 779 i i Canon M6
Canon T7i« »-80/1004.5/54/54/5 Feb 2017 749 i i Canon T7i
Canon G9 X« »HiRec-4.5/54/54.5/5 Oct 2015 529- i Canon G9 X
Canon M3« »rev75/1004.5/54.5/54/5 Feb 2015 679- i Canon M3
Canon T6i« »-75/1004.5/54.5/54.5/5 Feb 2015 749- i Canon T6i
Canon T6s« »Rec77/1004.5/54.5/54.5/5 Feb 2015 849- i Canon T6s
Canon G5 X« »HiRec78/1004.5/54/54.5/5 Oct 2015 799 i i Canon G5 X
Canon G7 X« »HiRec77/1004.5/53.5/54.5/5 Sep 2014 699- i Canon G7 X
Olympus E-M1 II« »HiRec85/1004.5/55/54.5/5 Sep 2016 1,999 i i Olympus E-M1 II
Panasonic GH5« »HiRec85/1004.5/55/55/5 Jan 2017 1,999 i i Panasonic GH5
Pentax KP« »-82/1005/5-4.5/5 Jan 2017 1,099 i i Pentax KP
Pentax K-3 II« »--5/54.5/55/5 Apr 2015 1,099 i i Pentax K-3 II
Pentax K-3« »-83/1005/54.5/55/5 Oct 2013 1,299- i Pentax K-3

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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