Canon G3 X vs G7X Mark III
The Canon PowerShot G3 X and the Canon PowerShot G7 X Mark III are two digital cameras that were officially introduced, respectively, in June 2015 and July 2019. Both the G3X and the G7X Mark III are fixed lens compact cameras that are equipped with an one-inch sensor. Both cameras offer a resolution of 20 megapixels.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon PowerShot G3 X and the Canon PowerShot G7 X Mark 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.
The physical size and weight of the Canon G3 X and the Canon G7 X Mark 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 size dimensions are rounded to the nearest millimeter.
The G7X Mark III can be obtained in two different colors (black, silver), while the G3X is only available in black.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon G7 X Mark III is considerably smaller (32 percent) than the Canon G3 X. Moreover, the G7X Mark III is substantially lighter (59 percent) than the G3X. It is worth mentioning in this context that the G3X is splash and dust resistant, while the G7X Mark III does not feature any corresponding weather-sealing.
Concerning battery life, the G3X gets 300 shots out of its NB-10L battery, while the G7X Mark III can take 235 images on a single charge of its NB-13L power pack. The power pack in the G7X Mark III can be charged via the USB port, which can be very convenient when travelling.
The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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.
|1.||Canon G3 X||123 mm||77 mm||105 mm||733 g||300||Y||Jun 2015||999|
|2.||Canon G7 X Mark III||105 mm||61 mm||41 mm||304 g||235||n||Jul 2019||749|
|3.||Canon G5 X Mark II||111 mm||61 mm||46 mm||340 g||230||n||Jul 2019||899|
|4.||Canon 80D||139 mm||105 mm||79 mm||730 g||960||Y||Feb 2016||1,199|
|5.||Canon G7 X Mark II||106 mm||61 mm||42 mm||319 g||265||n||Feb 2016||699|
|6.||Canon G5 X||112 mm||76 mm||44 mm||353 g||210||n||Oct 2015||799|
|7.||Canon G9 X||98 mm||58 mm||31 mm||209 g||220||n||Oct 2015||529|
|8.||Canon G7 X||103 mm||60 mm||40 mm||304 g||210||n||Sep 2014||699|
|9.||Canon 70D||139 mm||104 mm||79 mm||755 g||920||Y||Jul 2013||1,199|
|10.||Panasonic FZ1000||137 mm||99 mm||131 mm||831 g||360||n||Jun 2014||899|
|11.||Sony ZV-1||105 mm||60 mm||44 mm||294 g||260||n||May 2020||799|
|12.||Sony RX10 III||133 mm||94 mm||127 mm||1051 g||420||Y||Mar 2016||1,499|
|13.||Sony RX100 V||102 mm||58 mm||41 mm||299 g||220||n||Oct 2016||999|
|14.||Sony RX10 II||129 mm||88 mm||102 mm||813 g||400||Y||Jun 2015||1,299|
|15.||Sony RX100 IV||102 mm||58 mm||41 mm||298 g||280||n||Jun 2015||999|
|16.||Sony RX10||129 mm||88 mm||102 mm||813 g||420||Y||Oct 2013||1,299|
|Notes: 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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The G7X Mark III was launched at a somewhat lower price (by 25 percent) than the G3X, which makes it more attractive for photographers on a tight budget. 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.
The size of the imaging sensor is a crucial determinant 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. 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 associated with larger, more expensive camera bodies and lenses.
Both cameras under consideration feature an one-inch sensor and have a format factor (sometimes also referred to as "crop factor") of 2.7. Within the spectrum of camera sensors, this places the review cameras among the medium-sized sensor cameras that aim to strike a balance between image quality and portability. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
Technology-wise, the G7X Mark III uses a more advanced image processing engine (DIGIC 8) than the G3X (DIGIC 6), with benefits for noise reduction, color accuracy, and processing speed.
The two cameras under review do not only share the same sensor size, but also offer an identical resolution of 20 megapixels. This similarity in sensor specs implies that both the G3X and the G7X Mark III have the same pixel density, as well as the same pixel size. It should, however, be noted that the G7X Mark III is much more recent (by 4 years) than the G3X, and its sensor will have benefitted from technological advances during this time.
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 Canon PowerShot G7 X Mark III offers exactly the same ISO settings.
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 table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
| DXO |
|1.||Canon G3 X||1-inch||20.0||5472||3648||1080/60p||21.4||12.3||521||63|
|2.||Canon G7 X Mark III||1-inch||20.0||5472||3648||4K/30p||..||..||..||..|
|3.||Canon G5 X Mark II||1-inch||20.0||5472||3648||4K/30p||..||..||..||..|
|5.||Canon G7 X Mark II||1-inch||20.0||5472||3648||1080/60p||..||..||..||..|
|6.||Canon G5 X||1-inch||20.0||5472||3648||1080/60p||..||..||..||..|
|7.||Canon G9 X||1-inch||20.0||5472||3648||1080/60p||21.5||12.3||495||63|
|8.||Canon G7 X||1-inch||20.0||5472||3648||1080/60p||23.0||12.7||556||71|
|12.||Sony RX10 III||1-inch||20.0||5472||3648||4K/30p||23.1||12.6||472||70|
|13.||Sony RX100 V||1-inch||20.0||5472||3648||4K/30p||22.8||12.4||586||70|
|14.||Sony RX10 II||1-inch||20.0||5472||3648||4K/30p||23.0||12.6||531||70|
|15.||Sony RX100 IV||1-inch||20.0||5472||3648||4K/30p||22.8||12.6||591||70|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the G7X Mark III provides a better video resolution than the G3X. It can shoot movie footage at 4K/30p, while the G3X is limited to 1080/60p.
Apart from body and sensor, cameras can and do differ across a variety of features. The G3X and the G7X Mark III are similar in the sense that neither of the two has a viewfinder. The images are, thus, framed using live view on the rear LCD. That said, the G3X can be equipped with an optional viewfinder – the EVF-DC1. The adjacent table lists some of the other core features of the Canon G3 X and Canon G7 X Mark III along with similar information for a selection of comparators.
|1.||Canon G3 X||optional||n||3.2||1620||tilting||Y||1/2000s||5.9||Y||Y|
|2.||Canon G7 X Mark III||none||n||3.0||1040||tilting||Y||1/2000s||30||Y||Y|
|3.||Canon G5 X Mark II||2360||n||3.0||1040||tilting||Y||1/2000s||30||Y||Y|
|5.||Canon G7 X Mark II||none||n||3.0||1040||tilting||Y||1/2000s||8.0||Y||Y|
|6.||Canon G5 X||2360||n||3.0||1040||swivel||Y||1/2000s||5.9||Y||Y|
|7.||Canon G9 X||none||n||3.0||1040||fixed||Y||1/2000s||6.0||Y||Y|
|8.||Canon G7 X||none||n||3.0||1040||tilting||Y||1/2000s||6.5||Y||Y|
|12.||Sony RX10 III||2359||Y||3.0||1229||tilting||n||1/2000s||14.0||Y||Y|
|13.||Sony RX100 V||2359||n||3.0||1229||tilting||n||1/2000s||24.0||Y||Y|
|14.||Sony RX10 II||2359||Y||3.0||1229||tilting||n||1/3200s||14.0||Y||Y|
|15.||Sony RX100 IV||2359||n||3.0||1228||tilting||n||1/2000s||16.0||Y||Y|
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 G7X Mark 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 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.
Both the G3X and the G7X Mark III have zoom lenses built in. The G3X has a 24-600mm f/2.8-5.6 optic and the G7X Mark III offers a 24-100mm f/1.8-2.8 (focal lengths in full frame equivalent terms). Hence, the G3X and G7X Mark III provide the same view at the wide-angle end, but the G7X Mark III has less tele-photo reach at the long end. The G7X Mark III offers the faster maximum aperture.
Concerning the storage of imaging data, both the G3X and the G7X Mark III write their files to SDXC cards. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.
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 Canon PowerShot G7 X Mark III and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
|1.||Canon G3 X||Y||stereo||mono||Y||Y||mini||2.0||Y||Y||-|
|2.||Canon G7 X Mark III||-||stereo||mono||Y||-||micro||3.1||Y||-||Y|
|3.||Canon G5 X Mark II||-||stereo||mono||-||-||micro||3.1||Y||-||Y|
|5.||Canon G7 X Mark II||-||stereo||mono||-||-||micro||2.0||Y||Y||-|
|6.||Canon G5 X||Y||stereo||mono||-||-||mini||2.0||Y||Y||-|
|7.||Canon G9 X||-||stereo||mono||-||-||micro||2.0||Y||Y||-|
|8.||Canon G7 X||-||stereo||mono||-||-||micro||2.0||Y||Y||-|
|12.||Sony RX10 III||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-|
|13.||Sony RX100 V||-||stereo||mono||-||-||micro||2.0||Y||Y||-|
|14.||Sony RX10 II||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-|
|15.||Sony RX100 IV||-||stereo||mono||-||-||micro||2.0||Y||Y||-|
It is notable that the G3X has a hotshoe, while the G7X Mark III does not. This socket makes it possible to easily attach optional accessories, such as an external flash gun.
Both the G3X and the G7X Mark 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 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 website.
So how do things add up? Is there a clear favorite between the Canon G3 X and the Canon G7 X Mark III? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.
Arguments in favor of the Canon PowerShot G3 X:
- Better sound control: Has a headphone port that enables audio monitoring while recording.
- More framing options: Can be equipped with a hotshoe-mounted accessory-viewfinder.
- 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 1040k dots).
- More tele-reach: Has a longer tele-lens for perspective compression and subject magnification.
- Longer lasting: Can take more shots (300 versus 235) on a single battery charge.
- Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
- Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- More heavily discounted: Has been available for much longer (launched in June 2015).
Advantages of the Canon PowerShot G7 X Mark III:
- Better jpgs: Has a more modern image processing engine (DIGIC 8 vs DIGIC 6).
- Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
- Faster burst: Shoots at higher frequency (30 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.
- Better light gathering: Has a lens with a wider maximum aperture (f/1.8 vs f/2.8).
- More compact: Is smaller (105x61mm vs 123x77mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 429g or 59 percent) and is thus easier to take along.
- 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.
- More affordable: Was released into a lower priced segment (25 percent cheaper at launch).
- More modern: Reflects 4 years of technical progress since the G3X launch.
If the count of individual advantages (bullet points above) is taken as a guide, the G7X Mark III emerges as the winner of the match-up (13 : 10 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. A professional wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro 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 Canon G7 X Mark III place the cameras among the top in their class? Find out in the latest Best Superzoom Camera and Best Travel-Zoom Camera listings whether the two cameras rank among the cream of the crop.
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 G3X or the G7X Mark III perform in practice. 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 why hands-on reviews by experts are important. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], 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.
|1.||Canon G3 X||3.5/5||+||..||4.5/5||4/5||Jun 2015||999|
|2.||Canon G7 X Mark III||..||+ +||81/100||4/5||..||Jul 2019||749|
|3.||Canon G5 X Mark II||4/5||+||82/100||..||4/5||Jul 2019||899|
|4.||Canon 80D||4/5||+ +||84/100||4.5/5||4.5/5||Feb 2016||1,199|
|5.||Canon G7 X Mark II||4.5/5||+ +||81/100||4.5/5||4.5/5||Feb 2016||699|
|6.||Canon G5 X||5/5||+ +||78/100||4.5/5||4.5/5||Oct 2015||799|
|7.||Canon G9 X||3.5/5||+ +||..||4.5/5||4.5/5||Oct 2015||529|
|8.||Canon G7 X||4/5||+ +||77/100||4.5/5||4.5/5||Sep 2014||699|
|9.||Canon 70D||5/5||+ +||83/100||4.5/5||5/5||Jul 2013||1,199|
|10.||Panasonic FZ1000||4/5||+ +||82/100||4.5/5||4.5/5||Jun 2014||899|
|11.||Sony ZV-1||4/5||..||85/100||4/5||4.5/5||May 2020||799|
|12.||Sony RX10 III||5/5||+||84/100||4.5/5||4.5/5||Mar 2016||1,499|
|13.||Sony RX100 V||4.5/5||+ +||83/100||4/5||4.5/5||Oct 2016||999|
|14.||Sony RX10 II||5/5||+ +||82/100||4.5/5||4/5||Jun 2015||1,299|
|15.||Sony RX100 IV||4.5/5||+ +||85/100||4/5||4.5/5||Jun 2015||999|
|16.||Sony RX10||5/5||+||80/100||4.5/5||4.5/5||Oct 2013||1,299|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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, 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? If you would like to see a different side-by-side camera review, just use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
Specifications: Canon G3 X vs Canon G7 X Mark 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||Canon G7 X Mark III|
|Camera Type||Fixed lens compact camera||Fixed lens compact camera|
|Camera Lens||24-600mm f/2.8-5.6||24-100mm f/1.8-2.8|
|Launch Date||June 2015||July 2019|
|Launch Price||USD 999||USD 749|
|Sensor Specs||Canon G3 X||Canon G7 X Mark III|
|Sensor Format||1" Sensor||1" Sensor|
|Sensor Size||13.2 x 8.8 mm||13.2 x 8.8 mm|
|Sensor Area||116.16 mm2||116.16 mm2|
|Sensor Diagonal||15.9 mm||15.9 mm|
|Sensor Resolution||20 Megapixels||20 Megapixels|
|Image Resolution||5472 x 3648 pixels||5472 x 3648 pixels|
|Pixel Pitch||2.41 μm||2.41 μm|
|Pixel Density||17.18 MP/cm2||17.18 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||1080/60p Video||4K/30p Video|
|ISO Setting||125 - 12,800 ISO||125 - 12,800 ISO|
|ISO Boost||125 - 25,600 ISO||125 - 25,600 ISO|
|Image Processor||DIGIC 6||DIGIC 8|
|DXO Sensor Quality (score)||63||..|
|DXO Color Depth (bits)||21.4||..|
|DXO Dynamic Range (EV)||12.3||..|
|DXO Low Light (ISO)||521||..|
|Screen Specs||Canon G3 X||Canon G7 X Mark III|
|Viewfinder Type||Viewfinder optional||no viewfinder|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.2inch||3.0inch|
|LCD Resolution||1620k dots||1040k dots|
|LCD Attachment||Tilting screen||Tilting screen|
|Shooting Specs||Canon G3 X||Canon G7 X Mark III|
|Focus System||Contrast-detect AF||Contrast-detect AF|
|Manual Focusing Aid||Focus Peaking||Focus Peaking|
|Max Shutter Speed (mechanical)||1/2000s||1/2000s|
|Continuous Shooting||5.9 shutter flaps/s||30 shutter flaps/s|
|Electronic Shutter||no E-Shutter||up to 1/25600s|
|Time-Lapse Photography||no Intervalometer||Intervalometer built-in|
|Fill Flash||Build-in Flash||Build-in Flash|
|Storage Medium||SDXC cards||SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||UHS-I||UHS-I|
|Connectivity Specs||Canon G3 X||Canon G7 X Mark III|
|External Flash||Hotshoe||no Hotshoe|
|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||no Headphone port|
|Wifi Support||Wifi built-in||Wifi built-in|
|Near-Field Communication||NFC built-in||no NFC|
|Bluetooth Support||no Bluetooth||Bluetooth built-in|
|Body Specs||Canon G3 X||Canon G7 X Mark III|
|Environmental Sealing||Weathersealed body||not weather sealed|
|Battery Life (CIPA)||300 shots per charge||235 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)
105 x 61 x 41 mm
(4.1 x 2.4 x 1.6 in)
|Camera Weight||733 g (25.9 oz)||304 g (10.7 oz)|
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