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Canon G3 X versus Canon G1 X Mark III

The Canon PowerShot G3 X and the Canon PowerShot G1 X Mark III are two digital cameras that were announced, respectively, in June 2015 and October 2017. Both the G3X and the G1X Mark III are fixed lens compact cameras that are based on an one-inch (G3X) and an APS-C (G1X Mark III) sensor. The G3X has a resolution of 20 megapixel, whereas the G1X Mark III provides 24 MP. Read on to find out how these two cameras compare with respect to their size, their sensors, their features, and their reception by expert reviewers.

Body comparison: Canon G3 X vs Canon G1 X Mark III

The side-by-side display below illustrates the physical size and weight of the Canon G3 X and the Canon G1 X Mark III. 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. You can also use the toggle button to switch to a percentage comparison if you prefer that the measures are being expressed in relative terms (in this case, the camera on the left side – the G3X – represents the basis for the calculations across all the size and weight measures).

Compare Canon G3 X vs Canon G1 X Mark III
Compare G3X versus G1X Mark III top
Compare G3X and G1X Mark III rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon G1 X Mark III is notably smaller (5 percent) than the Canon G3 X. Moreover, the G1X Mark III is substantially lighter (46 percent) than the G3X. 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.

Concerning battery life, the G3X gets 300 shots out of its NB-10L battery, while the G1X Mark III can take 200 images on a single charge of its NB-13L power pack.

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, 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.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Canon G3 X» 123 mm 77 mm 105 mm 733 g 300 Y Jun 2015 999 i i Canon G3 X
Canon G1 X Mark III« 115 mm 78 mm 51 mm 399 g 200 Y Oct 2017 1,299 i i Canon G1 X Mark III
Canon 6D Mark II« » 144 mm 111 mm 75 mm 765 g 1200 Y Jun 2017 1,999 i i Canon 6D Mark II
Canon 80D« » 139 mm 105 mm 79 mm 730 g 960 Y Feb 2016 1,199 i i Canon 80D
Canon G9 X« » 98 mm 58 mm 31 mm 209 g 220 n Oct 2015 529- i Canon G9 X
Canon 7D II« » 149 mm 112 mm 78 mm 910 g 670 Y Sep 2014 1,799 i i Canon 7D II
Canon 70D« » 139 mm 104 mm 79 mm 755 g 920 Y Jul 2013 1,199- i Canon 70D
Fujifilm X100F« » 127 mm 75 mm 52 mm 469 g 390 n Jan 2017 1,299 i i Fujifilm X100F
Nikon D7500« » 136 mm 104 mm 73 mm 720 g 950 Y Apr 2017 1,299 i i Nikon D7500
Nikon D7200« » 136 mm 107 mm 76 mm 765 g 1110 Y Mar 2015 1,199- i Nikon D7200
Panasonic FZ1000« » 137 mm 99 mm 131 mm 831 g 360 n Jun 2014 899- i Panasonic FZ1000
Sony RX10 III« » 133 mm 94 mm 127 mm 1051 g 420 Y Mar 2016 1,499 i i Sony RX10 III
Sony RX100 V« » 102 mm 58 mm 41 mm 299 g 220 n Oct 2016 999 i i Sony RX100 V
Sony RX10 II« » 129 mm 88 mm 102 mm 813 g 400 Y Jun 2015 1,299- i Sony RX10 II
Sony RX100 IV« » 102 mm 58 mm 41 mm 298 g 280 n Jun 2015 999- i Sony RX100 IV

Any camera purchase will naturally be influenced heavily by the price. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. 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.

 

Sensor comparison: Canon G3 X vs Canon G1 X Mark III

The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have richer color-depth than smaller pixels in a sensor of the same technological generation. 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 Canon G1 X Mark III an APS-C sensor. The sensor area in the G1X Mark III is 186 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.7 and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Technology-wise, 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.

Canon G3 X and Canon G1 X Mark III sensor measures

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 pixel-units.

The G1X Mark III has on-sensor phase detect pixels, which results in relatively fast and reliable autofocus acquisition during video recording.

G3X versus G1X Mark III MP

For many cameras, data on sensor performance has been reported by DXO Mark. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Canon G3 X» 1-inch 20.0 5472 36481080/60p21.412.352163Canon G3 X
Canon G1 X Mark III« APS-C 24.0 6000 40001080/60p----Canon G1 X Mark III
Canon 6D Mark II« » Full Frame 26.0 6240 41601080/60p24.411.9286285Canon 6D Mark II
Canon 80D« » APS-C 24.0 6000 40001080/60p23.613.2113579Canon 80D
Canon G9 X« » 1-inch 20.0 5472 36481080/60p21.512.349563Canon G9 X
Canon 7D II« » APS-C 20.0 5472 36481080/60p22.411.8108270Canon 7D II
Canon 70D« » APS-C 20.0 5472 36481080/30p22.511.692668Canon 70D
Fujifilm X100F« » APS-C 24.0 6000 40001080/60p----Fujifilm X100F
Nikon D7500« » APS-C 20.7 5568 37124K/30p24.314.0148386Nikon D7500
Nikon D7200« » APS-C 24.0 6000 40001080/60p24.514.6133387Nikon D7200
Panasonic FZ1000« » 1-inch 20.0 5472 36484K/30p22.111.751764Panasonic FZ1000
Sony RX10 III« » 1-inch 20.0 5472 36484K/30p23.112.647270Sony RX10 III
Sony RX100 V« » 1-inch 20.0 5472 36484K/30p22.812.458670Sony RX100 V
Sony RX10 II« » 1-inch 20.0 5472 36484K/30p23.012.653170Sony RX10 II
Sony RX100 IV« » 1-inch 20.0 5472 36484K/30p22.812.659170Sony RX100 IV

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, and both provide the same movie specifications (1080/60p).

 

Feature comparison: Canon G3 X vs Canon G1 X Mark III

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 following table reports on some other key feature differences and similarities of the Canon G3 X, the Canon G1 X Mark III, and comparable cameras. The full specs-sheets can be found in the camera manual or in the dpreview camera hub.

Core Features
  Camera
Model
Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec)
Build-in
Flash
(yes/no)
Build-in
Image
Stab
Camera
Model
Canon G3 X»- n 3.2 1620 tilting Y 2000 5.9 Y Y Canon G3 X
Canon G1 X Mark III«2360 n 3.0 1040 swivel Y 2000 9.0 Y Y Canon G1 X Mark III
Canon 6D Mark II« »optical Y 3.0 1040 swivel Y 4000 6.5 n n Canon 6D Mark II
Canon 80D« »optical Y 3.0 1040 swivel Y 8000 7.0 Y n Canon 80D
Canon G9 X« »- n 3.0 1040 fixed Y 2000 6.0 Y Y Canon G9 X
Canon 7D II« »optical Y 3.0 1040 fixed n 8000 10.0 Y n Canon 7D II
Canon 70D« »optical Y 3.0 1040 swivel Y 8000 7.0 Y n Canon 70D
Fujifilm X100F« »2360 n 3.0 1040 fixed n 4000 8.0 Y n Fujifilm X100F
Nikon D7500« »optical Y 3.2 922 tilting Y 8000 8.0 Y n Nikon D7500
Nikon D7200« »optical Y 3.2 1229 fixed n 8000 6.0 Y n Nikon D7200
Panasonic FZ1000« »2359 n 3.0 921 swivel n 4000 12.0 Y Y Panasonic FZ1000
Sony RX10 III« »2359 Y 3.0 1229 tilting n 2000 14.0 Y Y Sony RX10 III
Sony RX100 V« »2359 n 3.0 1229 tilting n 2000 24.0 Y Y Sony RX100 V
Sony RX10 II« »2359 Y 3.0 1229 tilting n 3200 14.0 Y Y Sony RX10 II
Sony RX100 IV« »2359 n 3.0 1228 tilting n 2000 16.0 Y Y Sony RX100 IV

Both the G3X and the G1X Mark III have zoom lenses build in. The G3X has a 24-600mm f/2.8-5.6 optic and the G1X Mark III offers a 24-72mm f/2.8-5.6 (focal lengths in full frame equivalent terms). Hence, the G3X and G1X Mark III provide the same view at the wide-angle end, but the G1X Mark III has less tele-photo reach at the long end. Both cameras offer the same maximum aperture.

Both the G3X and the G1X Mark III write their imaging data to SDXC cards.

Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
Canon G3 X»YstereomonoYYmini2.0YY-Canon G3 X
Canon G1 X Mark III«Ystereomono--micro2.0YYYCanon G1 X Mark III
Canon 6D Mark II« »YstereomonoY-mini2.0YYYCanon 6D Mark II
Canon 80D« »YstereomonoYYmini2.0YY-Canon 80D
Canon G9 X« »-stereomono--micro2.0YY-Canon G9 X
Canon 7D II« »YstereomonoYYmini3.0---Canon 7D II
Canon 70D« »YstereomonoY-mini2.0Y--Canon 70D
Fujifilm X100F« »YstereomonoY-micro2.0Y--Fujifilm X100F
Nikon D7500« »YstereomonoYYmini2.0Y-YNikon D7500
Nikon D7200« »YstereomonoYYmini2.0YY-Nikon D7200
Panasonic FZ1000« »YstereomonoY-micro2.0YY-Panasonic FZ1000
Sony RX10 III« »YstereomonoYYmicro2.0YY-Sony RX10 III
Sony RX100 V« »-stereomono--micro2.0YY-Sony RX100 V
Sony RX10 II« »YstereomonoYYmicro2.0YY-Sony RX10 II
Sony RX100 IV« »-stereomono--micro2.0YY-Sony RX100 IV

Both the G3X and the G1X Mark III are recent models that feature in their makers' 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.

Review summary: Canon G3 X vs Canon G1 X Mark III

So how do things add up? Is the Canon G3 X better than the Canon G1 X Mark III or vice versa? The listing below highlights the relative strengths of the two models.


Reasons to prefer 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: Can take more shots (300 versus 200) on a single battery charge.
  • More affordable: Was introduced into a lower priced segment (23 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in June 2015).


Arguments in favor of the Canon PowerShot G1 X Mark III:

  • More detail: Has more megapixels (24 vs 20MP), which boosts linear resolution by 10%.
  • Better image quality: Is equipped with a larger and more technologically advanced sensor.
  • Richer colors: Larger sensor generates images with better, more accurate colors.
  • More dynamic range: Capable of capturing a wider spectrum of light and dark details.
  • Better low-light sensitivity: Can be used in poorly lit environments and still produce good images.
  • Better jpgs: Has a more modern image processing engine (DIGIC 7 vs DIGIC 6).
  • Better video autofocus: Features on-sensor phase-detection for more confident movie autofocus.
  • Easier framing: Has an electronic viewfinder for image framing and settings control.
  • More flexible LCD: Has 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.
  • Less heavy: Has a lower weight (by 334g or 46 percent) and is thus easier to take along.
  • 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.

If the count of relative strengths (bullet points above) is taken as a measure, the G1X Mark III is the clear winner of the contest (13 : 8 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.

G3X 08:13 G1X Mark III

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the G3X or the G1X Mark III handle or 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. This is why hands-on reviews by experts are important. The table below summarizes the assessments of some of the best known camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). The detailed reviews can be accessed by clicking on the site logo in the table header.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Canon G3 X»Rec-4.5/53.5/54/5 Jun 2015 999 i i Canon G3 X
Canon G1 X Mark III«Rec79/1004.5/5-4.5/5 Oct 2017 1,299 i i Canon G1 X Mark III
Canon 6D Mark II« »Rec80/1004.5/54/54/5 Jun 2017 1,999 i i Canon 6D Mark II
Canon 80D« »HiRec84/1004.5/54.5/54.5/5 Feb 2016 1,199 i i Canon 80D
Canon G9 X« »HiRec-4.5/54/54.5/5 Oct 2015 529- i Canon G9 X
Canon 7D II« »Rec84/1004/55/54.5/5 Sep 2014 1,799 i i Canon 7D II
Canon 70D« »HiRec83/1004.5/54.5/55/5 Jul 2013 1,199- i Canon 70D
Fujifilm X100F« »Rec83/1004.5/5-4.5/5 Jan 2017 1,299 i i Fujifilm X100F
Nikon D7500« »HiRec86/1005/54.5/54.5/5 Apr 2017 1,299 i i Nikon D7500
Nikon D7200« »HiRec84/1004.5/54/54.5/5 Mar 2015 1,199- i Nikon D7200
Panasonic FZ1000« »HiRec82/1004.5/54.5/54.5/5 Jun 2014 899- i Panasonic FZ1000
Sony RX10 III« »Rec84/1004.5/54.5/54.5/5 Mar 2016 1,499 i i Sony RX10 III
Sony RX100 V« »HiRec83/1004/55/54.5/5 Oct 2016 999 i i Sony RX100 V
Sony RX10 II« »HiRec82/1004.5/54.5/54/5 Jun 2015 1,299- i Sony RX10 II
Sony RX100 IV« »HiRec85/1004/54.5/54.5/5 Jun 2015 999- i Sony RX100 IV

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. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparisons of ratings among very different cameras or across long time periods 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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting. If the camera you are interested in is not available, please contact me, and I will try to locate and add the respective data to the application.

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