Canon G3 X vs Sony A7 III
The Canon PowerShot G3 X and the Sony Alpha A7 III are two digital cameras that were announced, respectively, in June 2015 and February 2018. The G3X is a fixed lens compact, while the A7 III is a mirrorless interchangeable lens camera. The cameras are based on an one-inch (G3X) and a full frame (A7 III) sensor. The Canon has a resolution of 20 megapixels, whereas the Sony provides 24 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Canon G3 X||Sony A7 III|
|Fixed lens compact camera||Mirrorless system camera|
|24-600mm f/2.8-5.6||Sony E mount lenses|
|20 MP, 1" Sensor||24 MP, Full Frame Sensor|
|1080/60p Video||4K/30p Video|
|ISO 125-12800 (125-25600)||ISO 100-51200 (50-204800)|
|Viewfinder optional||Electronic viewfinder (2359k dots)|
|3.2" LCD, 1620k dots||3.0" LCD, 922k dots|
|Tilting touchscreen||Tilting touchscreen|
|5.9 shutter flaps per second||10 shutter flaps per second|
|Lens-based stabilization||In-body stabilization|
|Weathersealed body||Weathersealed body|
|300 shots per battery charge||610 shots per battery charge|
|123 x 77 x 105 mm, 733 g||127 x 96 x 74 mm, 650 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon PowerShot G3 X and the Sony Alpha A7 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: Canon G3 X vs Sony A7 III
The physical size and weight of the Canon G3 X and the Sony A7 III 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.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7 III is notably larger (29 percent) than the Canon G3 X. 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 and possibly misleading, as the G3X has a lens built in, whereas the A7 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 A7 III and their specifications in the Sony FE Lens Catalog.
Concerning battery life, the G3X gets 300 shots out of its NB-10L battery, while the A7 III can take 610 images on a single charge of its NP-FZ100 power pack. The power pack in the A7 III can be charged via the USB port, which can be very convenient when travelling.
The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you would like to visualize and compare a different camera combination, just use the right or left arrows in the table to switch to the respective camera. Alternatively, you can also navigate to the CAM-parator app and make your selection from the full list of cameras there.
|Canon G3 X»||4.8 in||3.0 in||4.1 in||25.9 oz||300||Y||Jun 2015||999||Canon G3 X|
|Sony A7 III«||5.0 in||3.8 in||2.9 in||22.9 oz||610||Y||Feb 2018||1,999||Sony A7 III|
|Canon 80D« »||5.5 in||4.1 in||3.1 in||25.8 oz||960||Y||Feb 2016||1,199||Canon 80D|
|Canon G9 X« »||3.9 in||2.3 in||1.2 in||7.4 oz||220||n||Oct 2015||529||-||Canon G9 X|
|Canon G7 X« »||4.1 in||2.4 in||1.6 in||10.7 oz||210||n||Sep 2014||699||-||Canon G7 X|
|Canon 70D« »||5.5 in||4.1 in||3.1 in||26.6 oz||920||Y||Jul 2013||1,199||-||Canon 70D|
|Panasonic FZ1000« »||5.4 in||3.9 in||5.2 in||29.3 oz||360||n||Jun 2014||899||-||Panasonic FZ1000|
|Sony A9« »||5.0 in||3.8 in||2.5 in||23.7 oz||650||Y||Apr 2017||4,499||Sony A9|
|Sony RX10 III« »||5.2 in||3.7 in||5.0 in||37.1 oz||420||Y||Mar 2016||1,499||Sony RX10 III|
|Sony RX100 V« »||4.0 in||2.3 in||1.6 in||10.5 oz||220||n||Oct 2016||999||Sony RX100 V|
|Sony A7R II« »||5.0 in||3.8 in||2.4 in||22.0 oz||290||Y||Jun 2015||3,199||-||Sony A7R II|
|Sony A7S II« »||5.0 in||3.8 in||2.4 in||22.1 oz||370||Y||Sep 2015||2,999||Sony A7S II|
|Sony RX10 II« »||5.1 in||3.5 in||4.0 in||28.7 oz||400||Y||Jun 2015||1,299||-||Sony RX10 II|
|Sony RX100 IV« »||4.0 in||2.3 in||1.6 in||10.5 oz||280||n||Jun 2015||999||-||Sony RX100 IV|
|Sony A7 II« »||5.0 in||3.8 in||2.4 in||21.1 oz||350||Y||Nov 2014||1,999||-||Sony A7 II|
|Sony A7« »||5.0 in||3.7 in||1.9 in||16.7 oz||340||Y||Oct 2013||1,699||-||Sony A7|
|Sony RX10« »||5.1 in||3.5 in||4.0 in||28.7 oz||420||Y||Oct 2013||1,299||-||Sony RX10|
|Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.|
The price is, of course, an important factor in any camera decision. 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 G3X was launched at a lower price than the A7 III, despite having a lens built in. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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 G3 X vs Sony A7 III
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 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. 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 tend to be more expensive and lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Canon G3 X features an one-inch sensor and the Sony A7 III a full frame sensor. The sensor area in the A7 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.
In terms of underlying technology, both cameras are build around BSI-CMOS sensors.
With 24MP, the A7 III offers a higher resolution than the G3X (20MP), but the A7 III nevertheless has larger individual pixels (pixel pitch of 5.94μm versus 2.41μm for the G3X) due to its larger sensor. Moreover, the A7 III is a much more recent model (by 2 years and 8 months) than the G3X, and its sensor will 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 A7 III has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Sony A7 III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7 III for good quality output (200 dots per inch) amounts to 30 x 20 inch or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inch or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inch or 50.8 x 33.9 cm. The corresponding values for the Canon G3 X are 27.4 x 18.2 inch or 69.5 x 46.3 cm for good quality, 21.9 x 14.6 inch or 55.6 x 37.1 cm for very good quality, and 18.2 x 12.2 inch or 46.3 x 30.9 cm for excellent quality prints.
The A7 III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
The Canon PowerShot G3 X 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 A7 III are ISO 100 to ISO 51200, with the possibility to increase the ISO range to 50-204800.
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. Of the two cameras under consideration, the A7 III offers substantially better image quality than the G3X (overall score 33 points higher). The advantage is based on 3.6 bits higher color depth, 2.4 EV in additional dynamic range, and 2.8 stops in additional low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
|Canon G3 X»||1-inch||20.0||5472||3648||1080/60p||21.4||12.3||521||63||Canon G3 X|
|Sony A7 III«||Full Frame||24.0||6000||4000||4K/30p||25.0||14.7||3730||96||Sony A7 III|
|Canon 80D« »||APS-C||24.0||6000||4000||1080/60p||23.6||13.2||1135||79||Canon 80D|
|Canon G9 X« »||1-inch||20.0||5472||3648||1080/60p||21.5||12.3||495||63||Canon G9 X|
|Canon G7 X« »||1-inch||20.0||5472||3648||1080/60p||23.0||12.7||556||71||Canon G7 X|
|Canon 70D« »||APS-C||20.0||5472||3648||1080/30p||22.5||11.6||926||68||Canon 70D|
|Panasonic FZ1000« »||1-inch||20.0||5472||3648||4K/30p||22.1||11.7||517||64||Panasonic FZ1000|
|Sony A9« »||Full Frame||24.0||6000||4000||4K/30p||24.9||13.3||3517||92||Sony A9|
|Sony RX10 III« »||1-inch||20.0||5472||3648||4K/30p||23.1||12.6||472||70||Sony RX10 III|
|Sony RX100 V« »||1-inch||20.0||5472||3648||4K/30p||22.8||12.4||586||70||Sony RX100 V|
|Sony A7R II« »||Full Frame||42.2||7952||5304||4K/30p||26.0||13.9||3434||98||Sony A7R II|
|Sony A7S II« »||Full Frame||12.0||4240||2832||4K/30p||23.6||13.3||2993||85||Sony A7S II|
|Sony RX10 II« »||1-inch||20.0||5472||3648||4K/30p||23.0||12.6||531||70||Sony RX10 II|
|Sony RX100 IV« »||1-inch||20.0||5472||3648||4K/30p||22.8||12.6||591||70||Sony RX100 IV|
|Sony A7 II« »||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90||Sony A7 II|
|Sony A7« »||Full Frame||24.0||6000||4000||1080/60p||24.8||14.2||2248||90||Sony A7|
|Sony RX10« »||1-inch||20.0||5472||3648||1080/60p||22.9||12.6||474||69||Sony RX10|
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 A7 III provides a better video resolution than the G3X. It can shoot movie footage at 4K/30p, while the Canon is limited to 1080/60p.
Feature comparison: Canon G3 X vs Sony A7 III
Beyond body and sensor, cameras can and do differ across a range of features. For example, the A7 III has an electronic viewfinder (2359k dots), which can be very helpful when shooting in bright sunlight. In contrast, the G3X relies on live view and the rear LCD for framing. That said, the G3X can be equipped with an optional viewfinder – the EVF-DC1. The table below summarizes some of the other core capabilities of the Canon G3 X and Sony A7 III in connection with corresponding information for a sample of similar cameras.
|Canon G3 X»||-||n||3.2||1620||tilting||Y||1/2000s||5.9||Y||Y||Canon G3 X|
|Sony A7 III«||2359||n||3.0||922||tilting||Y||1/8000s||10.0||n||Y||Sony A7 III|
|Canon 80D« »||optical||Y||3.0||1040||swivel||Y||1/8000s||7.0||Y||n||Canon 80D|
|Canon G9 X« »||-||n||3.0||1040||fixed||Y||1/2000s||6.0||Y||Y||Canon G9 X|
|Canon G7 X« »||-||n||3.0||1040||tilting||Y||1/2000s||6.5||Y||Y||Canon G7 X|
|Canon 70D« »||optical||Y||3.0||1040||swivel||Y||1/8000s||7.0||Y||n||Canon 70D|
|Panasonic FZ1000« »||2359||n||3.0||921||swivel||n||1/4000s||12.0||Y||Y||Panasonic FZ1000|
|Sony A9« »||3686||n||3.0||1440||tilting||Y||1/8000s||20.0||n||Y||Sony A9|
|Sony RX10 III« »||2359||Y||3.0||1229||tilting||n||1/2000s||14.0||Y||Y||Sony RX10 III|
|Sony RX100 V« »||2359||n||3.0||1229||tilting||n||1/2000s||24.0||Y||Y||Sony RX100 V|
|Sony A7R II« »||2400||n||3.0||1229||tilting||n||1/8000s||5.0||n||Y||Sony A7R II|
|Sony A7S II« »||2400||n||3.0||1229||tilting||n||1/8000s||5.0||n||Y||Sony A7S II|
|Sony RX10 II« »||2359||Y||3.0||1229||tilting||n||1/3200s||14.0||Y||Y||Sony RX10 II|
|Sony RX100 IV« »||2359||n||3.0||1228||tilting||n||1/2000s||16.0||Y||Y||Sony RX100 IV|
|Sony A7 II« »||2400||n||3.0||1230||tilting||n||1/8000s||5.0||n||Y||Sony A7 II|
|Sony A7« »||2400||n||3.0||1230||tilting||n||1/8000s||5.0||n||n||Sony A7|
|Sony RX10« »||1440||Y||3.0||1229||tilting||n||1/3200s||10.0||Y||Y||Sony RX10|
One difference between the cameras concerns the presence of an on-board flash. The G3X has one, while the A7 III does not. While the built-in flash of the G3X is not very powerful, it can at times be useful as a fill-in light.The G3X has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the A7 III does not have a selfie-screen.
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, the A7 III is one of those camera that have an additional 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 Sony A7 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 G3X writes its imaging data to SDXC cards, while the A7 III uses SDXC or Memory Stick PRO Duo cards. The A7 III features dual card slots, which can be very useful in case a memory card fails. In contrast, the G3X only has one slot. The A7 III supports UHS-II cards (on its first slot), while the G3X can use UHS-I cards.
Connectivity comparison: Canon G3 X vs Sony A7 III
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 G3 X and Sony Alpha A7 III and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Canon G3 X»||Y||stereo||mono||Y||Y||mini||2.0||Y||Y||-||Canon G3 X|
|Sony A7 III«||Y||stereo||mono||Y||Y||micro||3.1||Y||Y||Y||Sony A7 III|
|Canon 80D« »||Y||stereo||mono||Y||Y||mini||2.0||Y||Y||-||Canon 80D|
|Canon G9 X« »||-||stereo||mono||-||-||micro||2.0||Y||Y||-||Canon G9 X|
|Canon G7 X« »||-||stereo||mono||-||-||micro||2.0||Y||Y||-||Canon G7 X|
|Canon 70D« »||Y||stereo||mono||Y||-||mini||2.0||Y||-||-||Canon 70D|
|Panasonic FZ1000« »||Y||stereo||mono||Y||-||micro||2.0||Y||Y||-||Panasonic FZ1000|
|Sony A9« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||Y||Sony A9|
|Sony RX10 III« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony RX10 III|
|Sony RX100 V« »||-||stereo||mono||-||-||micro||2.0||Y||Y||-||Sony RX100 V|
|Sony A7R II« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7R II|
|Sony A7S II« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7S II|
|Sony RX10 II« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony RX10 II|
|Sony RX100 IV« »||-||stereo||mono||-||-||micro||2.0||Y||Y||-||Sony RX100 IV|
|Sony A7 II« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7 II|
|Sony A7« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7|
|Sony RX10« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony RX10|
Both the G3X and the A7 III are recent models that are part of the current product line-up. The A7 III replaced the earlier Sony A7 II, while the G3X does not have a direct predecessor. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon and Sony websites.
Review summary: Canon G3 X vs Sony A7 III
So what conclusions can be drawn? Is the Canon G3 X better than the Sony A7 III or vice versa? The listing below highlights the relative strengths of the two models.
Reasons to prefer the Canon PowerShot G3 X:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- 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 922k dots).
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Ready to shoot: Has a lens built-in, whereas the A7 III requires a separate lens.
- More compact: Is smaller (123x77mm vs 127x96mm) and thus needs less room in the bag.
- 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 available for much longer (launched in June 2015).
Advantages of the Sony Alpha A7 III:
- 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.
- Better image quality: Scores substantially higher (33 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (3.6 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (2.4 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (2.8 stops ISO advantage).
- Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- Easier framing: Has an electronic viewfinder for image framing and settings control.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/2000s) to freeze action.
- Faster burst: Shoots at higher frequency (10 vs 5.9 flaps/sec) to capture the decisive moment.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- More flexible: Takes interchangeable lenses and can thus be used with specialty optics.
- Longer lasting: Gets more shots (610 versus 300) out of a single battery charge.
- Easier travel charging: Can be conveniently charged via its USB port.
- Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- 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: Reflects 2 years and 8 months of technical progress since the G3X launch.
If the count of individual advantages (bullet points above) is taken as a guide, the A7 III is the clear winner of the contest (20 : 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. 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.
How about other alternatives? Do the specifications of the Canon G3 X and the Sony A7 III place the cameras among the top in their class? Find out in the latest Best Superzoom 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 partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the G3X or the A7 III. 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: Canon G3 X vs Sony A7 III
This is why hands-on reviews by experts are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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.
|Canon G3 X»||+||-||4.5/5||3.5/5||4/5||Jun 2015||999||Canon G3 X|
|Sony A7 III«||+ +||89/100||5/5||5/5||5/5||Feb 2018||1,999||Sony A7 III|
|Canon 80D« »||+ +||84/100||4.5/5||4.5/5||4.5/5||Feb 2016||1,199||Canon 80D|
|Canon G9 X« »||+ +||-||4.5/5||4/5||4.5/5||Oct 2015||529||-||Canon G9 X|
|Canon G7 X« »||+ +||77/100||4.5/5||3.5/5||4.5/5||Sep 2014||699||-||Canon G7 X|
|Canon 70D« »||+ +||83/100||4.5/5||4.5/5||5/5||Jul 2013||1,199||-||Canon 70D|
|Panasonic FZ1000« »||+ +||82/100||4.5/5||4.5/5||4.5/5||Jun 2014||899||-||Panasonic FZ1000|
|Sony A9« »||+ +||89/100||5/5||5/5||5/5||Apr 2017||4,499||Sony A9|
|Sony RX10 III« »||+||84/100||4.5/5||4.5/5||4.5/5||Mar 2016||1,499||Sony RX10 III|
|Sony RX100 V« »||+ +||83/100||4/5||5/5||4.5/5||Oct 2016||999||Sony RX100 V|
|Sony A7R II« »||+ +||90/100||5/5||4.5/5||5/5||Jun 2015||3,199||-||Sony A7R II|
|Sony A7S II« »||+||-||4.5/5||5/5||5/5||Sep 2015||2,999||Sony A7S II|
|Sony RX10 II« »||+ +||82/100||4.5/5||4.5/5||4/5||Jun 2015||1,299||-||Sony RX10 II|
|Sony RX100 IV« »||+ +||85/100||4/5||4.5/5||4.5/5||Jun 2015||999||-||Sony RX100 IV|
|Sony A7 II« »||+||82/100||4.5/5||5/5||5/5||Nov 2014||1,999||-||Sony A7 II|
|Sony A7« »||+ +||80/100||5/5||4.5/5||5/5||Oct 2013||1,699||-||Sony A7|
|Sony RX10« »||+||80/100||4.5/5||4.5/5||4.5/5||Oct 2013||1,299||-||Sony RX10|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (-) not available.|
Care should be taken when interpreting the review scores above, though. The ratings are only valid when referring to cameras in the same category and of the same age. Hence, a score should always be seen in the context of the camera's market launch date and its price, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. It should also be noted that some of the review sites have over time altered the way they render their verdicts.
Other camera comparisons
Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes below. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.
- Canon 1300D vs Sony A7 III
- Canon 750D vs Sony A7 III
- Canon 7D vs Sony A7 III
- Canon G3 X vs Nikon B600
- Canon G3 X vs Panasonic G3
- Canon G3 X vs Panasonic GH4
- Canon M vs Sony A7 III
- Fujifilm X30 vs Sony A7 III
- Nikon D5100 vs Sony A7 III
- Olympus E-M10 II vs Sony A7 III
- Olympus E-M10 III vs Sony A7 III
- Panasonic GH5 vs Sony A7 III
Specifications: Canon G3 X vs Sony A7 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 Model||Canon G3 X||Sony A7 III|
|Camera Type||Fixed lens compact camera||Mirrorless system camera|
|Camera Lens||24-600mm f/2.8-5.6||Sony E mount lenses|
|Launch Date||June 2015||February 2018|
|Launch Price||USD 999||USD 1999|
|Sensor Specs||Canon G3 X||Sony A7 III|
|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|
|Sensor Resolution||20 Megapixels||24 Megapixels|
|Image Resolution||5472 x 3648 pixels||6000 x 4000 pixels|
|Pixel Pitch||2.41 μm||5.94 μm|
|Pixel Density||17.18 MP/cm2||2.83 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||1080/60p Video||4K/30p Video|
|ISO Setting||125-12800 ISO||100-51200 ISO|
|ISO Boost||125-25600 ISO||50-204800 ISO|
|Image Processor||DIGIC 6||BIONZ X|
|DXO Sensor Quality (score)||63||96|
|DXO Color Depth (bits)||21.4||25.0|
|DXO Dynamic Range (EV)||12.3||14.7|
|DXO Low Light (ISO)||521||3730|
|Screen Specs||Canon G3 X||Sony A7 III|
|Viewfinder Type||Viewfinder optional||Electronic viewfinder|
|Viewfinder Field of View||100%|
|Viewfinder Resolution||2359k dots|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.2 inch||3.0 inch|
|LCD Resolution||1620k dots||922k dots|
|LCD Attachment||Tilting screen||Tilting screen|
|Shooting Specs||Canon G3 X||Sony A7 III|
|Autofocus System||Contrast-detect AF||On-Sensor Phase-detect|
|Manual Focusing Aid||Focus Peaking||Focus Peaking|
|Max Shutter Speed (mechanical)||1/2000/s||1/8000/s|
|Continuous Shooting||5.9 shutter flaps/s||10 shutter flaps/s|
|Electronic Shutter||no E-Shutter||YES|
|Time-Lapse Photography||no Intervalometer||Intervalometer built-in|
|Image Stabilization||Lens-based stabilization||In-body stabilization|
|Fill Flash||Build-in Flash||no On-Board Flash|
|Storage Medium||SDXC cards||MS or SDXC cards|
|Second Storage Option||Single card slot||Dual card slots|
|UHS card support||UHS-I||Single UHS-II|
|Connectivity Specs||Canon G3 X||Sony A7 III|
|USB Connector||USB 2.0||USB 3.1|
|HDMI Port||mini HDMI||micro HDMI|
|Microphone Port||External MIC port||External MIC port|
|Headphone Socket||Headphone port||Headphone port|
|Wifi Support||Wifi built-in||Wifi built-in|
|Near-Field Communication||NFC built-in||NFC built-in|
|Bluetooth Support||no Bluetooth||Bluetooth built-in|
|Body Specs||Canon G3 X||Sony A7 III|
|Environmental Sealing||Weathersealed body||Weathersealed body|
|Battery Type||NB-10L power pack||NP-FZ100 power pack|
|Battery Life (CIPA)||300 shots per charge||610 shots per charge|
|In-Camera Charging||no USB charging||USB charging|
123 x 77 x 105 mm
(4.8 x 3.0 x 4.1 in)
127 x 96 x 74 mm
(5.0 x 3.8 x 2.9 in)
|Camera Weight||733 g (25.9 oz)||650 g (22.9 oz)|
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