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Canon G7 X Mark III vs Sony A7S III

The Canon PowerShot G7 X Mark III and the Sony Alpha 7S III are two digital cameras that were officially introduced, respectively, in July 2019 and July 2020. The G7X Mark III is a fixed lens compact, while the A7S III is a mirrorless interchangeable lens camera. The cameras are based on an one-inch (G7X Mark III) and a full frame (A7S III) sensor. The Canon has a resolution of 20 megapixels, whereas the Sony provides 12 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Canon G7 X Mark III
versus
Sony A7S III
Canon G7 X Mark III   Sony A7S III
Fixed lens compact camera Mirrorless system camera
24-100mm f/1.8-2.8 Sony E mount lenses
20 MP – 1" sensor 12 MP – Full Frame sensor
4K/30p Video 4K/120p Video
ISO 125-12,800 (125 - 25,600) ISO 80-102,400 (40 - 409,600)
No viewfinder, LCD framing Electronic viewfinder (9440k dots)
3.0" LCD – 1040k dots 3.0" LCD – 1440k dots
Tilting touchscreen Swivel touchscreen
30 shutter flaps per second 10 shutter flaps per second
Lens-based stabilizationIn-body stabilization
not weather sealedWeathersealed body
235 shots per battery charge600 shots per battery charge
105 x 61 x 41 mm, 304 g 127 x 97 x 81 mm, 699 g
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Check G7X Mark III price at
amazon.com
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Check A7S III price at
amazon.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon PowerShot G7 X Mark III and the Sony Alpha 7S III? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.

Body comparison

The physical size and weight of the Canon G7 X Mark III and the Sony A7S III are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth measures are rounded to the nearest millimeter.

The G7X Mark III can be obtained in two different colors (black, silver), while the A7S III is only available in black.

Size Canon G7 X Mark III vs Sony A7S III
Compare G7X Mark III versus A7S III top
Comparison G7X Mark III or A7S III rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7S III is considerably larger (92 percent) than the Canon G7 X Mark III. It is noteworthy in this context that the A7S III is splash and dust-proof, while the G7X Mark III 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 III has a lens built in, whereas the A7S III is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can compare the optics available for the A7S III and their specifications in the Sony FE Lens Catalog.

Concerning battery life, the G7X Mark III gets 235 shots out of its NB-13L battery, while the A7S III can take 600 images on a single charge of its NP-FZ100 power pack. The battery packs of both cameras can be charged via USB, which can be very convenient when travelling.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

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Body Specifications
    Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Canon G7 X Mark III 105 mm 61 mm 41 mm 304 g 235 n Jul 2019 749 amazon.com
2.
 
Sony A7S III 127 mm 97 mm 81 mm 699 g 600 Y Jul 2020 3,499 amazon.com
3.
 
Canon G5 X Mark II 111 mm 61 mm 46 mm 340 g 230 n Jul 2019 899 amazon.com
4.
 
Canon M50 116 mm 88 mm 59 mm 390 g 235 n Feb 2018 779ebay.com
5.
 
Canon SX740 110 mm 64 mm 40 mm 299 g 265 n Jul 2018 399 amazon.com
6.
 
Canon G7 X Mark II 106 mm 61 mm 42 mm 319 g 265 n Feb 2016 699ebay.com
7.
 
Canon G5 X 112 mm 76 mm 44 mm 353 g 210 n Oct 2015 799ebay.com
8.
 
Canon G7 X 103 mm 60 mm 40 mm 304 g 210 n Sep 2014 699ebay.com
9.
 
Fujifilm XF10 113 mm 64 mm 41 mm 279 g 330 n Jul 2018 499ebay.com
10.
 
Panasonic TZ200 111 mm 65 mm 45 mm 340 g 370 n Feb 2018 799 amazon.com
11.
 
Sony A1 129 mm 97 mm 81 mm 737 g 530 Y Jan 2021 6,499 amazon.com
12.
 
Sony A7 IV 131 mm 96 mm 80 mm 659 g 580 Y Oct 2021 2,499 amazon.com
13.
 
Sony ZV-1 105 mm 60 mm 44 mm 294 g 260 n May 2020 799 amazon.com
14.
 
Sony A7R IV 129 mm 96 mm 78 mm 665 g 670 Y Jul 2019 3,499 amazon.com
15.
 
Sony RX100 VI 102 mm 58 mm 43 mm 301 g 240 n Jun 2018 1,199ebay.com
16.
 
Sony A7R II 127 mm 96 mm 60 mm 625 g 290 Y Jun 2015 3,199ebay.com
17.
 
Sony A7S II 127 mm 96 mm 60 mm 627 g 370 Y Sep 2015 2,999ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.

Any camera decision will naturally be influenced heavily by the price. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The G7X Mark III was launched at a lower price than the A7S III, despite having a lens built 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 imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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 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 III features an one-inch sensor and the Sony A7S III a full frame sensor. The sensor area in the A7S III is 630 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 III and Sony A7S III sensor measures

Despite having a smaller sensor, the Canon G7 X Mark III offers a higher resolution of 20 megapixels, compared with 12 MP of the Sony A7S III. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 2.41μm versus 8.40μm for the A7S III). Moreover, it should be noted that the A7S III is a somewhat more recent model (by 1 year) than the G7X Mark III, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units.

The resolution advantage of the Canon G7 X Mark III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the G7X Mark III for good quality output (200 dots per inch) amounts to 27.4 x 18.2 inches or 69.5 x 46.3 cm, for very good quality (250 dpi) 21.9 x 14.6 inches or 55.6 x 37.1 cm, and for excellent quality (300 dpi) 18.2 x 12.2 inches or 46.3 x 30.9 cm. The corresponding values for the Sony A7S III are 21.2 x 14.2 inches or 53.8 x 36 cm for good quality, 17 x 11.3 inches or 43.1 x 28.8 cm for very good quality, and 14.1 x 9.4 inches or 35.9 x 24 cm for excellent quality prints.

The A7S III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Canon PowerShot G7 X Mark III has a native sensitivity range from ISO 125 to ISO 12800, which can be extended to ISO 125-25600. The corresponding ISO settings for the Sony Alpha 7S III are ISO 80 to ISO 102400, with the possibility to increase the ISO range to 40-409600.

Technology-wise, both cameras are equipped with BSI-CMOS (Backside Illuminated Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

G7X Mark III versus A7S III 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"). The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

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Sensor Characteristics
    Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Canon G7 X Mark III 1-inch 20.0 5472 36484K/30p22.212.458365
2.
 
Sony A7S III Full Frame 12.0 4240 28324K/120p23.713.9252086
3.
 
Canon G5 X Mark II 1-inch 20.0 5472 36484K/30p22.212.458365
4.
 
Canon M50 APS-C 24.0 6000 40004K/24p23.813.3168481
5.
 
Canon SX740 1/2.3 20.2 5184 38884K/30p20.612.1105051
6.
 
Canon G7 X Mark II 1-inch 20.0 5472 36481080/60p21.811.926062
7.
 
Canon G5 X 1-inch 20.0 5472 36481080/60p21.412.347162
8.
 
Canon G7 X 1-inch 20.0 5472 36481080/60p23.012.755671
9.
 
Fujifilm XF10 APS-C 24.0 6000 40004K/15p24.013.4184483
10.
 
Panasonic TZ200 1-inch 20.0 5472 36484K/30p22.012.244964
11.
 
Sony A1 Full Frame 49.8 8640 57608k/30p25.914.5316398
12.
 
Sony A7 IV Full Frame 32.7 7008 46724K/60p25.414.7337997
13.
 
Sony ZV-1 1-inch 20.0 5472 36484K/30p22.212.666966
14.
 
Sony A7R IV Full Frame 60.2 9504 63364K/30p26.014.8334499
15.
 
Sony RX100 VI 1-inch 20.0 5472 36484K/30p22.112.347864
16.
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
17.
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
Note: DXO values in italics represent estimates based on sensor size and age.

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 A7S III provides a faster frame rate than the G7X Mark III. It can shoot movie footage at 4K/120p, while the Canon is limited to 4K/30p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the A7S III has an electronic viewfinder (9440k dots), which can be very helpful when shooting in bright sunlight. In contrast, the G7X Mark III 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 III and Sony A7S III in connection with corresponding information for a sample of similar cameras.

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Core Features
    Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Canon G7 X Mark IIInone n3.0 / 1040 tilting Y 1/2000s 30/s Y Y
2.
 
Sony A7S III9440 n3.0 / 1440 swivel Y 1/8000s 10.0/s n Y
3.
 
Canon G5 X Mark II2360 n3.0 / 1040 tilting Y 1/2000s 30/s Y Y
4.
 
Canon M502360 n3.0 / 1040 swivel Y 1/4000s 10.0/s Y n
5.
 
Canon SX740none n3.0 / 922 tilting n 1/3200s 10.0/s Y Y
6.
 
Canon G7 X Mark IInone n3.0 / 1040 tilting Y 1/2000s 8.0/s Y Y
7.
 
Canon G5 X2360 n3.0 / 1040 swivel Y 1/2000s 5.9/s Y Y
8.
 
Canon G7 Xnone n3.0 / 1040 tilting Y 1/2000s 6.5/s Y Y
9.
 
Fujifilm XF10none n3.0 / 1040 fixed Y 1/4000s 6.0/s Y n
10.
 
Panasonic TZ2002330 n3.0 / 1240 fixed Y 1/2000s 10.0/s Y Y
11.
 
Sony A19437 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
12.
 
Sony A7 IV3686 n3.0 / 1037 swivel Y 1/8000s 10.0/s n Y
13.
 
Sony ZV-1none n3.0 / 922 swivel Y 1/2000s 24.0/s n Y
14.
 
Sony A7R IV5760 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
15.
 
Sony RX100 VI2359 n3.0 / 1229 tilting Y 1/2000s 24.0/s Y Y
16.
 
Sony A7R II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
17.
 
Sony A7S II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One difference between the cameras concerns the presence of an on-board flash. The G7X Mark III has one, while the A7S III does not. While the built-in flash of the G7X Mark III is not very powerful, it can at times be useful as a fill-in light.

Both cameras have an articulated rear screen that can be turned to be front-facing. This feature will be particularly appreciated by vloggers and photographers who are interested in taking selfies.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, both cameras under consideration feature an electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The Canon G7 X Mark III has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

The G7X Mark III writes its imaging data to SDXC cards, while the A7S III uses CFexpress (type A) or SDXC cards. The A7S III features dual card slots, which can be very useful in case a memory card fails. In contrast, the G7X Mark III only has one slot. The A7S III supports UHS-II cards (on both slots), while the G7X Mark III can use UHS-I cards.

Connectivity comparison

For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Canon PowerShot G7 X Mark III and Sony Alpha 7S III and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
    Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Canon G7 X Mark III-stereo / monoY-micro3.1Y-Y
2.
 
Sony A7S IIIYstereo / monoYYfull3.2Y-Y
3.
 
Canon G5 X Mark II-stereo / mono--micro3.1Y-Y
4.
 
Canon M50Ystereo / monoY-micro2.0Y-Y
5.
 
Canon SX740-stereo / mono--micro2.0Y-Y
6.
 
Canon G7 X Mark II-stereo / mono--micro2.0YY-
7.
 
Canon G5 XYstereo / mono--mini2.0YY-
8.
 
Canon G7 X-stereo / mono--micro2.0YY-
9.
 
Fujifilm XF10-stereo / monoY-micro2.0Y-Y
10.
 
Panasonic TZ200-stereo / mono--micro2.0Y-Y
11.
 
Sony A1Ystereo / monoYYfull3.2Y-Y
12.
 
Sony A7 IVYstereo / monoYYfull3.2Y-Y
13.
 
Sony ZV-1Ystereo / monoY-micro2.0Y-Y
14.
 
Sony A7R IVYstereo / monoYYmicro3.1YYY
15.
 
Sony RX100 VI-stereo / mono--micro2.0YYY
16.
 
Sony A7R IIYstereo / monoYYmicro2.0YY-
17.
 
Sony A7S IIYstereo / monoYYmicro2.0YY-

It is notable that the A7S III has a hotshoe, which makes it possible to easily attach optional accessories, such as an external flash gun. The G7X Mark III does not feature such an accessory-socket.

Both the G7X Mark III and the A7S III are recent models that are part of the current product line-up. The G7X Mark III replaced the earlier Canon G7X Mark II, while the A7S III followed on from the Sony A7S II. Further information on the features and operation of the G7X Mark III and A7S III can be found, respectively, in the Canon G7 X Mark III Manual (free pdf) or the online Sony A7S III Manual.

Review summary

So how do things add up? Is there a clear favorite between the Canon G7 X Mark III and the Sony A7S III? Which camera is better? The listing below highlights the relative strengths of the two models.

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Advantages of the Canon PowerShot G7 X Mark III:

  • More detail: Offers more megapixels (20 vs 12MP) with a 29% higher linear resolution.
  • Faster burst: Shoots at higher frequency (30 vs 10 flaps/sec) to capture the decisive moment.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • Ready to shoot: Has a lens built-in, whereas the A7S III requires a separate lens.
  • More compact: Is smaller (105x61mm vs 127x97mm) and thus needs less room in the bag.
  • Less heavy: Is lighter even though it comes with a built-in lens (unlike the A7S III).
  • 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 built-in lens.
  • More heavily discounted: Has been on the market for longer (launched in July 2019).

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Reasons to prefer the Sony Alpha 7S III:

  • Better image quality: Is equipped with a larger and more technologically advanced sensor.
  • Richer colors: The sensor size advantage translates into images with better, more accurate colors.
  • More dynamic range: Larger sensor captures a wider spectrum of light and dark details.
  • Better low-light sensitivity: Larger sensor produces good images even in poorly lit environments.
  • Better video: Provides higher movie framerates (4K/120p versus 4K/30p).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • Easier framing: Has an electronic viewfinder for image composition and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1440k vs 1040k dots).
  • More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/2000s) to freeze action.
  • More flexible: Takes interchangeable lenses and can thus be used with specialty optics.
  • Longer lasting: Gets more shots (600 versus 235) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
  • Faster data transfer: Supports a more advanced USB protocol (3.2 vs 3.1).
  • More solid recording: Has a full-sized HDMI port for a sturdy connection to an external recorder.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
  • More modern: Was introduced somewhat (1 year) more recently.

If the count of individual advantages (bullet points above) is taken as a guide, the A7S III is the clear winner of the contest (20 : 9 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision on a new camera. A professional wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

G7X Mark III 09:20 A7S III

How about other alternatives? Do the specifications of the Canon G7 X Mark III and the Sony A7S III place the cameras among the top in their class? Find out in the latest Best Travel-Zoom Camera and Best Mirrorless Interchangeable Lens Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains incomplete and does no justice, for example, to the way the G7X Mark III or the A7S III perform in practice. 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.

Expert reviews

This is why hands-on reviews by experts are important. The adjacent summary-table relays the overall verdicts of several of the most popular camera review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

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Expert Camera Reviews
     Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Canon G7 X Mark III..+ +4/581/1004/5.. Jul 2019 749 amazon.com
2.
 
Sony A7S III..+ +5/591/1004.5/55/5 Jul 2020 3,499 amazon.com
3.
 
Canon G5 X Mark II4/5+4/582/100..4/5 Jul 2019 899 amazon.com
4.
 
Canon M50..+4/579/100..3.5/5 Feb 2018 779ebay.com
5.
 
Canon SX740..+3.5/5..4/54/5 Jul 2018 399 amazon.com
6.
 
Canon G7 X Mark II4.5/5+ +..81/1004.5/54.5/5 Feb 2016 699ebay.com
7.
 
Canon G5 X5/5+ +..78/1004.5/54.5/5 Oct 2015 799ebay.com
8.
 
Canon G7 X4/5+ +..77/1004.5/54.5/5 Sep 2014 699ebay.com
9.
 
Fujifilm XF10....4/575/1004/54.5/5 Jul 2018 499ebay.com
10.
 
Panasonic TZ200..+ +4.5/581/1004.5/54.5/5 Feb 2018 799 amazon.com
11.
 
Sony A15/5o4.5/593/1004.5/55/5 Jan 2021 6,499 amazon.com
12.
 
Sony A7 IV5/5+ +4.5/589/1004.5/54.5/5 Oct 2021 2,499 amazon.com
13.
 
Sony ZV-14/5..4.5/585/1004/54.5/5 May 2020 799 amazon.com
14.
 
Sony A7R IV5/5+4.5/591/1004.5/55/5 Jul 2019 3,499 amazon.com
15.
 
Sony RX100 VI4.5/5+ +..83/1004/54.5/5 Jun 2018 1,199ebay.com
16.
 
Sony A7R II5/5+ +5/590/1005/55/5 Jun 2015 3,199ebay.com
17.
 
Sony A7S II5/5+....4.5/55/5 Sep 2015 2,999ebay.com
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

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 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.

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Check G7X Mark III price at
amazon.com
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Check A7S III price at
amazon.com

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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Canon G7 X Mark III vs Sony A7S III

    Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.

    Camera Specifications
    Camera Model Canon G7 X Mark III Sony A7S III
    Camera Type Fixed lens compact camera Mirrorless system camera
    Camera Lens 24-100mm f/1.8-2.8 Sony E mount lenses
    Launch Date July 2019 July 2020
    Launch Price USD 749 USD 3,499
    Sensor Specs Canon G7 X Mark III Sony A7S III
    Sensor Technology BSI-CMOS BSI-CMOS
    Sensor Format 1" Sensor Full Frame Sensor
    Sensor Size 13.2 x 8.8 mm 35.6 x 23.8 mm
    Sensor Area 116.16 mm2 847.28 mm2
    Sensor Diagonal 15.9 mm 42.8 mm
    Crop Factor 2.7x 1.0x
    Sensor Resolution 20 Megapixels 12 Megapixels
    Image Resolution 5472 x 3648 pixels 4240 x 2832 pixels
    Pixel Pitch 2.41 μm 8.40 μm
    Pixel Density 17.18 MP/cm2 1.42 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 4K/30p Video 4K/120p Video
    ISO Setting 125 - 12,800 ISO 80 - 102,400 ISO
    ISO Boost 125 - 25,600 ISO 40 - 409,600 ISO
    Image Processor DIGIC 8 BIONZ XR
    DXO Sensor Quality (score) .. 86
    DXO Color Depth (bits) .. 23.7
    DXO Dynamic Range (EV) .. 13.9
    DXO Low Light (ISO) .. 2520
    Screen Specs Canon G7 X Mark III Sony A7S III
    Viewfinder Type no viewfinder Electronic viewfinder
    Viewfinder Field of View 100%
    Viewfinder Magnification 0.91x
    Viewfinder Resolution 9440k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1040k dots 1440k dots
    LCD Attachment Tilting screen Swivel screen
    Touch Input Touchscreen Touchscreen
    Shooting Specs Canon G7 X Mark III Sony A7S III
    Focus System Contrast-detect AF On-Sensor Phase-detect
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/2000s 1/8000s
    Continuous Shooting 30 shutter flaps/s 10 shutter flaps/s
    Electronic Shutterup to 1/25600sYES
    Time-Lapse PhotographyIntervalometer built-inno Intervalometer
    Image StabilizationLens-based stabilizationIn-body stabilization
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium SDXC cards CFexA or SDXC cards
    Single or Dual Card Slots Single card slot Dual card slots
    UHS card support UHS-I Dual UHS-II
    Connectivity Specs Canon G7 X Mark III Sony A7S III
    External Flash no Hotshoe Hotshoe
    USB Connector USB 3.1 USB 3.2
    HDMI Port micro HDMI full HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket no Headphone port Headphone port
    Wifi Support Wifi built-in Wifi built-in
    Bluetooth Support Bluetooth built-in Bluetooth built-in
    Body Specs Canon G7 X Mark III Sony A7S III
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type NB-13L NP-FZ100
    Battery Life (CIPA)235 shots per charge600 shots per charge
    In-Camera Charging USB charging USB charging
    Body Dimensions 105 x 61 x 41 mm
    (4.1 x 2.4 x 1.6 in)
    127 x 97 x 81 mm
    (5.0 x 3.8 x 3.2 in)
    Camera Weight 304 g (10.7 oz) 699 g (24.7 oz)
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