Canon G1 X Mark III vs G3X
The Canon PowerShot G1 X Mark III and the Canon PowerShot G3 X are two digital cameras that were announced, respectively, in October 2017 and June 2015. Both the G1X Mark III and the G3X are fixed lens compact cameras that are based on an APS-C (G1X Mark III) and an one-inch (G3X) sensor. The G1X Mark III has a resolution of 24 megapixels, whereas the G3X provides 20 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Canon G1 X Mark III||Canon G3 X|
|Fixed lens compact camera||Fixed lens compact camera|
|24-72mm f/2.8-5.6||24-600mm f/2.8-5.6|
|24 MP, APS-C Sensor||20 MP, 1" Sensor|
|1080/60p Video||1080/60p Video|
|ISO 100-25600||ISO 125-12800 (125-25600)|
|Electronic viewfinder (2360k dots)||Viewfinder optional|
|3.0" LCD, 1040k dots||3.2" LCD, 1620k dots|
|Swivel touchscreen||Tilting touchscreen|
|9 shutter flaps per second||5.9 shutter flaps per second|
|Weathersealed body||Weathersealed body|
|200 shots per battery charge||300 shots per battery charge|
|115 x 78 x 51 mm, 399 g||123 x 77 x 105 mm, 733 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon PowerShot G1 X Mark III and the Canon PowerShot G3 X? 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 G1 X Mark III and the Canon G3 X are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side 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 Canon G3 X is notably larger (6 percent) than the Canon G1 X Mark III. Moreover, the G3X is substantially heavier (84 percent) than the G1X Mark III. 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 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 camera comparisons there.
|Canon G1 X Mark III»||4.5 in||3.1 in||2.0 in||14.1 oz||200||Y||Oct 2017||1,299||Canon G1 X Mark III|
|Canon G3 X«||4.8 in||3.0 in||4.1 in||25.9 oz||300||Y||Jun 2015||999||Canon G3 X|
|Canon 6D Mark II« »||5.7 in||4.4 in||3.0 in||27.0 oz||1200||Y||Jun 2017||1,999||Canon 6D Mark II|
|Canon 80D« »||5.5 in||4.1 in||3.1 in||25.8 oz||960||Y||Feb 2016||1,199||Canon 80D|
|Canon SX540« »||4.7 in||3.2 in||3.6 in||15.6 oz||205||n||Jan 2016||399||Canon SX540|
|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|
|Fujifilm X100V« »||5.0 in||3.0 in||2.1 in||16.9 oz||420||Y||Feb 2020||1,399||Fujifilm X100V|
|Fujifilm X-T3« »||5.2 in||3.7 in||2.3 in||19.0 oz||390||Y||Sep 2018||1,499||Fujifilm X-T3|
|Fujifilm X100F« »||5.0 in||3.0 in||2.0 in||16.5 oz||390||n||Jan 2017||1,299||Fujifilm X100F|
|Nikon D7500« »||5.4 in||4.1 in||2.9 in||25.4 oz||950||Y||Apr 2017||1,299||Nikon D7500|
|Panasonic FZ1000« »||5.4 in||3.9 in||5.2 in||29.3 oz||360||n||Jun 2014||899||Panasonic FZ1000|
|Sony A6300« »||4.7 in||2.6 in||1.9 in||14.3 oz||400||Y||Feb 2016||999||Sony A6300|
|Sony A6500« »||4.7 in||2.6 in||2.1 in||16.0 oz||350||Y||Oct 2016||1,399||Sony A6500|
|Sony RX10 III« »||5.2 in||3.7 in||5.0 in||37.1 oz||420||Y||Mar 2016||1,499||Sony RX10 III|
|Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.|
Any camera decision will obviously take relative prices into account. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The G3X was launched at a somewhat lower price (by 23 percent) than the G1X Mark III, 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.
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 G1 X Mark III features an APS-C sensor and the Canon G3 X an one-inch sensor. The sensor area in the G3X is 65 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 2.7. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
In terms of chip-set technology, the G1X Mark III uses a more advanced image processing engine (DIGIC 7) than the G3X (DIGIC 6), with benefits for noise reduction, color accuracy, and processing speed.
With 24MP, the G1X Mark III offers a higher resolution than the G3X (20MP), but the G1X Mark III nevertheless has larger individual pixels (pixel pitch of 3.72μm versus 2.41μm for the G3X) due to its larger sensor. Moreover, the G1X Mark III is a much more recent model (by 2 years and 3 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 pixels.
The resolution advantage of the Canon G1 X Mark III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the G1X Mark 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 G1X Mark III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
The Canon PowerShot G1 X Mark III has a native sensitivity range from ISO 100 to ISO 25600. The corresponding ISO settings for the Canon PowerShot G3 X are ISO 125 to ISO 12800, with the possibility to increase the ISO range to 125-25600.
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.
|Canon G1 X Mark III||APS-C||24.0||6000||4000||1080/60p||..||..||..||..||Canon G1 X Mark III|
|Canon G3 X||1-inch||20.0||5472||3648||1080/60p||21.4||12.3||521||63||Canon G3 X|
|Canon 6D Mark II||Full Frame||26.0||6240||4160||1080/60p||24.4||11.9||2862||85||Canon 6D Mark II|
|Canon 80D||APS-C||24.0||6000||4000||1080/60p||23.6||13.2||1135||79||Canon 80D|
|Canon SX540||1/2.3||20.2||5184||3888||1080/60p||..||..||..||..||Canon SX540|
|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|
|Fujifilm X100V||APS-C||26.0||6240||4160||4K/30p||..||..||..||..||Fujifilm X100V|
|Fujifilm X-T3||APS-C||26.0||6240||4160||4K/60p||..||..||..||..||Fujifilm X-T3|
|Fujifilm X100F||APS-C||24.0||6000||4000||1080/60p||..||..||..||..||Fujifilm X100F|
|Nikon D7500||APS-C||20.7||5568||3712||4K/30p||24.3||14.0||1483||86||Nikon D7500|
|Panasonic FZ1000||1-inch||20.0||5472||3648||4K/30p||22.1||11.7||517||64||Panasonic FZ1000|
|Sony A6300||APS-C||24.0||6000||4000||4K/30p||24.4||13.7||1437||85||Sony A6300|
|Sony A6500||APS-C||24.0||6000||4000||4K/30p||24.5||13.7||1405||85||Sony A6500|
|Sony RX10 III||1-inch||20.0||5472||3648||4K/30p||23.1||12.6||472||70||Sony RX10 III|
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).
Apart from body and sensor, cameras can and do differ across a variety of features. For example, the G1X Mark III has an electronic viewfinder (2360k 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 G1 X Mark III and Canon G3 X in connection with corresponding information for a sample of similar cameras.
|Canon G1 X Mark III||2360||n||3.0||1040||swivel||Y||1/2000s||9.0||Y||Y||Canon G1 X Mark III|
|Canon G3 X||optional||n||3.2||1620||tilting||Y||1/2000s||5.9||Y||Y||Canon G3 X|
|Canon 6D Mark II||optical||Y||3.0||1040||swivel||Y||1/4000s||6.5||n||n||Canon 6D Mark II|
|Canon 80D||optical||Y||3.0||1040||swivel||Y||1/8000s||7.0||Y||n||Canon 80D|
|Canon SX540||none||n||3.0||461||fixed||n||1/2000s||5.9||Y||Y||Canon SX540|
|Canon G9 X||none||n||3.0||1040||fixed||Y||1/2000s||6.0||Y||Y||Canon G9 X|
|Canon G7 X||none||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|
|Fujifilm X100V||3690||n||3.0||1620||tilting||Y||1/4000s||11.0||Y||n||Fujifilm X100V|
|Fujifilm X-T3||3690||n||3.0||1040||tilting||Y||1/8000s||11.0||n||n||Fujifilm X-T3|
|Fujifilm X100F||2360||n||3.0||1040||fixed||n||1/4000s||8.0||Y||n||Fujifilm X100F|
|Nikon D7500||optical||Y||3.2||922||tilting||Y||1/8000s||8.0||Y||n||Nikon D7500|
|Panasonic FZ1000||2359||n||3.0||921||swivel||n||1/4000s||12.0||Y||Y||Panasonic FZ1000|
|Sony A6300||2359||n||3.0||922||tilting||n||1/4000s||11.0||Y||n||Sony A6300|
|Sony A6500||2359||n||3.0||922||tilting||Y||1/4000s||11.0||Y||Y||Sony A6500|
|Sony RX10 III||2359||Y||3.0||1229||tilting||n||1/2000s||14.0||Y||Y||Sony RX10 III|
The Canon G1 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 G1X Mark III and the G3X have zoom lenses built in. The G1X Mark III has a 24-72mm f/2.8-5.6 optic and the G3X offers a 24-600mm f/2.8-5.6 (focal lengths in full frame equivalent terms). Hence, the G1X Mark III and G3X provide the same view at the wide-angle end, but the G3X has more tele-photo reach at the long end. Both cameras offer the same maximum aperture.
Concerning the storage of imaging data, both the G1X Mark III and the G3X 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 G1 X Mark III and Canon PowerShot G3 X and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Canon G1 X Mark III||Y||stereo||mono||-||-||micro||2.0||Y||Y||Y||Canon G1 X Mark III|
|Canon G3 X||Y||stereo||mono||Y||Y||mini||2.0||Y||Y||-||Canon G3 X|
|Canon 6D Mark II||Y||stereo||mono||Y||-||mini||2.0||Y||Y||Y||Canon 6D Mark II|
|Canon 80D||Y||stereo||mono||Y||Y||mini||2.0||Y||Y||-||Canon 80D|
|Canon SX540||-||stereo||mono||-||-||mini||2.0||Y||Y||-||Canon SX540|
|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|
|Fujifilm X100V||Y||stereo||mono||Y||-||micro||3.1||Y||-||Y||Fujifilm X100V|
|Fujifilm X-T3||Y||stereo||mono||Y||Y||micro||3.1||Y||-||Y||Fujifilm X-T3|
|Fujifilm X100F||Y||stereo||mono||Y||-||micro||2.0||Y||-||-||Fujifilm X100F|
|Nikon D7500||Y||stereo||mono||Y||Y||mini||2.0||Y||-||Y||Nikon D7500|
|Panasonic FZ1000||Y||stereo||mono||Y||-||micro||2.0||Y||Y||-||Panasonic FZ1000|
|Sony A6300||Y||stereo||mono||Y||-||micro||2.0||Y||Y||-||Sony A6300|
|Sony A6500||Y||stereo||mono||Y||-||micro||2.0||Y||Y||-||Sony A6500|
|Sony RX10 III||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony RX10 III|
It is notable that the G3X has a microphone port, which can help to improve the quality of audio recordings by attaching an external microphone. The G1X Mark III does not feature such a mic input.
Both the G1X Mark III and the G3X are recent models that are part of the current product line-up. The G1X Mark III replaced the earlier Canon G1 X 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 what conclusions can be drawn? Which of the two cameras – the Canon G1 X Mark III or the Canon G3 X – has the upper hand? Is one clearly better than the other? A synthesis of the relative strong points of each of the models is listed below.
Reasons to prefer the Canon PowerShot G1 X Mark III:
- More detail: Offers more megapixels (24 vs 20MP) with a 10% higher linear resolution.
- Better image quality: Features a larger and more technologically advanced imaging 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 jpgs: Has a more modern image processing engine (DIGIC 7 vs DIGIC 6).
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- Easier framing: Has an electronic viewfinder for image composition and settings control.
- More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
- Faster burst: Shoots at higher frequency (9 vs 5.9 flaps/sec) to capture the decisive moment.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- Less heavy: Is lighter (by 334g or 46 percent) and hence easier to carry around.
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- More modern: Reflects 2 years and 3 months of technical progress since the G3X launch.
Advantages of the Canon PowerShot G3 X:
- Better sound: Can connect to an external microphone for higher quality sound recording.
- Better sound control: Has a headphone port that enables audio monitoring while recording.
- 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: Gets more shots (300 versus 200) out of a single battery charge.
- More affordable: Was released into a lower priced segment (23 percent cheaper at launch).
- More heavily discounted: Has been around for much longer (launched in June 2015).
If the count of relative strengths (bullet points above) is taken as a measure, the G1X Mark III is the clear winner of the match-up (14 : 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 before making a camera decision. 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 G1 X Mark III and the Canon G3 X place the cameras among the top in their class? Find out in the latest Best Travel-Zoom Camera and Best Superzoom 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 G1X Mark III or the G3X 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 where reviews by experts come in. The adjacent summary-table relays the overall verdicts of several of the most popular camera 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.
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 rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. 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 are interested in seeing how other cameras pair up, just make your choice using the following search menu. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
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- Canon G1 X Mark III vs Canon XT
- Canon G1 X Mark III vs Panasonic GH5
- Canon G1 X Mark III vs Panasonic TS7
- Canon G1 X Mark III vs Sony A9
- Canon G3 X vs Canon SX720
- Canon G3 X vs Fujifilm X-T4
- Canon G3 X vs Leica M Typ 262
- Canon G3 X vs Nikon D3
- Canon G3 X vs Olympus E-520
- Canon G3 X vs Panasonic G7
- Canon G3 X vs Sony A99
Specifications: Canon G1 X Mark III vs Canon G3 X
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 G1 X Mark III||Canon G3 X|
|Camera Type||Fixed lens compact camera||Fixed lens compact camera|
|Camera Lens||24-72mm f/2.8-5.6||24-600mm f/2.8-5.6|
|Launch Date||October 2017||June 2015|
|Launch Price||USD 1299||USD 999|
|Sensor Specs||Canon G1 X Mark III||Canon G3 X|
|Sensor Format||APS-C Sensor||1" Sensor|
|Sensor Size||22.3 x 14.9 mm||13.2 x 8.8 mm|
|Sensor Area||332.27 mm2||116.16 mm2|
|Sensor Diagonal||26.8 mm||15.9 mm|
|Sensor Resolution||24 Megapixels||20 Megapixels|
|Image Resolution||6000 x 4000 pixels||5472 x 3648 pixels|
|Pixel Pitch||3.72 μm||2.41 μm|
|Pixel Density||7.22 MP/cm2||17.18 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||1080/60p Video||1080/60p Video|
|ISO Setting||100-25600 ISO||125-12800 ISO|
|ISO Boost||no Enhancement||125-25600 ISO|
|Image Processor||DIGIC 7||DIGIC 6|
|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 G1 X Mark III||Canon G3 X|
|Viewfinder Type||Electronic viewfinder||Viewfinder optional|
|Viewfinder Field of View||100%|
|Viewfinder Resolution||2360k dots|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0 inch||3.2 inch|
|LCD Resolution||1040k dots||1620k dots|
|LCD Attachment||Swivel screen||Tilting screen|
|Shooting Specs||Canon G1 X Mark III||Canon G3 X|
|Focus System||On-Sensor Phase-detect||Contrast-detect AF|
|Manual Focusing Aid||Focus Peaking||Focus Peaking|
|Max Shutter Speed (mechanical)||1/2000/s||1/2000/s|
|Continuous Shooting||9 shutter flaps/s||5.9 shutter flaps/s|
|Time-Lapse Photography||Intervalometer built-in||no Intervalometer|
|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 G1 X Mark III||Canon G3 X|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||micro HDMI||mini HDMI|
|Microphone Port||no MIC socket||External MIC port|
|Headphone Socket||no Headphone port||Headphone port|
|Wifi Support||Wifi built-in||Wifi built-in|
|Near-Field Communication||NFC built-in||NFC built-in|
|Bluetooth Support||Bluetooth built-in||no Bluetooth|
|Body Specs||Canon G1 X Mark III||Canon G3 X|
|Environmental Sealing||Weathersealed body||Weathersealed body|
|Battery Life (CIPA)||200 shots per charge||300 shots per charge|
115 x 78 x 51 mm
(4.5 x 3.1 x 2.0 in)
123 x 77 x 105 mm
(4.8 x 3.0 x 4.1 in)
|Camera Weight||399 g (14.1 oz)||733 g (25.9 oz)|
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