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Sony RX100 III versus Canon G7 X

The Sony Cyber-shot DSC-RX100 III and the Canon PowerShot G7 X are two digital cameras that were announced, respectively, in May 2014 and September 2014. Both the RX100 III and the G7X are fixed lens compact cameras that are equipped with an one-inch sensor. Both cameras offer a resolution of 20 megapixel. 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: Sony RX100 III vs Canon G7 X

An illustration of the physical size and weight of the Sony RX100 III and the Canon G7 X is provided in the side-by-side display below. Three successive views from the front, the top, and the rear are shown. All width, height and depth dimensions 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 – the RX100 III – represents 100 percent across all the size and weight measures).

Snapsort Sony RX100 III vs Canon G7 X
Compare RX100 III versus G7X top
Compare RX100 III and G7X rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon G7 X is somewhat larger (4 percent) than the Sony RX100 III. Moreover, the G7X is markedly heavier (5 percent) than the RX100 III. In this context, it is worth noting that neither the RX100 III nor the G7X are weather-sealed.

Concerning battery life, the RX100 III gets 320 shots out of its NP-BX1 battery, while the G7X can take 210 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 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.

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)
Sony RX100 III» 4.0 in 2.3 in 1.6 in 10.2 oz 320 n May 2014 799- i
Canon G7 X« 4.1 in 2.4 in 1.6 in 10.7 oz 210 n Sep 2014 699- i
Canon G7 X Mark II« » 4.2 in 2.4 in 1.7 in 11.3 oz 265 n Feb 2016 699 i i
Canon M3« » 4.4 in 2.7 in 1.7 in 12.9 oz 250 n Feb 2015 679- i
Canon T6i« » 5.2 in 4.0 in 3.1 in 19.6 oz 440 n Feb 2015 749- i
Canon G5 X« » 4.4 in 3.0 in 1.7 in 12.5 oz 210 n Oct 2015 799 i i
Canon T5i« » 5.2 in 3.9 in 3.1 in 20.5 oz 440 n Mar 2013 649- i
Panasonic FZ1000« » 5.4 in 3.9 in 5.2 in 29.3 oz 360 n Jun 2014 899- i
Ricoh GR II« » 4.6 in 2.5 in 1.4 in 8.9 oz 320 n Jun 2015 699- i
Ricoh GR« » 4.6 in 2.4 in 1.4 in 8.6 oz 290 n Apr 2013 799- i
Sony RX100 V« » 4.0 in 2.3 in 1.6 in 10.5 oz 220 n Oct 2016 999 i i
Sony RX100 IV« » 4.0 in 2.3 in 1.6 in 10.5 oz 280 n Jun 2015 999- i
Sony A5100« » 4.3 in 2.5 in 1.4 in 10.0 oz 400 n Aug 2014 549 i i
Sony RX100 II« » 4.0 in 2.3 in 1.5 in 9.9 oz 350 n Jun 2013 749- i
Sony RX100« » 4.0 in 2.3 in 1.4 in 8.5 oz 330 n Jun 2012 649- i

The price is, of course, an important factor in any camera decision. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The G7X was launched at a somewhat lower price (by 13 percent) than the RX100 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.

 

Sensor comparison: Sony RX100 III vs Canon G7 X

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.

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.

Sony RX100 III and Canon G7 X sensor measures

The two cameras under review do not only share the same sensor size, but also offer an identical resolution of 20 megapixel. This similarity in sensor specs implies that both the RX100 III and the G7X have the same pixel density, as well as the same pixel size. It should, however, be noted that the G7X is a somewhat more recent model (by 4 months) than the RX100 III, and its sensor might have benefitted from technological advances during this time.

RX100 III versus G7X MP

Consistent information on actual sensor performance is available from DXO Mark for most cameras. 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 G7X has a markedly higher DXO score than the RX100 III (overall score 4 points higher), which will translate into better image quality. The advantage is based on 0.6 bits higher color depth, 0.4 EV in additional dynamic range, and 0.2 stops in additional low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

Sensor Characteristics
  Camera Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Sony RX100 III» 1-inch 20.0 5472 36481080/60p22.412.349567
Canon G7 X« 1-inch 20.0 5472 36481080/60p23.012.755671
Canon G7 X Mark II« » 1-inch 20.0 5472 36481080/60p----
Canon M3« » APS-C 24.0 6000 40001080/30p22.811.8116972
Canon T6i« » APS-C 24.0 6000 40001080/60p22.712.091971
Canon G5 X« » 1-inch 20.0 5472 36481080/60p----
Canon T5i« » APS-C 17.9 5184 34561080/30p21.711.268161
Panasonic FZ1000« » 1-inch 20.0 5472 36484K/30p22.111.751764
Ricoh GR II« » APS-C 16.1 4928 32641080/30p23.613.7107880
Ricoh GR« » APS-C 16.1 4928 32641080/30p23.613.597278
Sony RX100 V« » 1-inch 20.0 5472 36484K/30p22.812.458670
Sony RX100 IV« » 1-inch 20.0 5472 36484K/30p22.812.659170
Sony A5100« » APS-C 24.0 6000 40001080/60p23.812.7134780
Sony RX100 II« » 1-inch 20.0 5472 36481080/60p22.512.448367
Sony RX100« » 1-inch 20.0 5472 36481080/60p22.612.439066

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

 

Feature comparison: Sony RX100 III vs Canon G7 X

Apart from body and sensor, cameras can and do differ across a range of features. For example, the RX100 III has an electronic viewfinder (1440k dots), which can be very helpful when shooting in bright sunlight. In contrast, the G7X relies on live view and the rear LCD for framing. The following table reports on some other key feature differences and similarities of the Sony RX100 III, the Canon G7 X, and comparable cameras. The full specs-sheets can be found in the camera manual or, for example, in the dpreview camera hub.

Core Features
  Camera 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
Sony RX100 III»1440 n 3.0 1229 tilting n 2000 10.0 Y Y
Canon G7 X«- n 3.0 1040 tilting Y 2000 6.5 Y Y
Canon G7 X Mark II« »- n 3.0 1040 tilting Y 2000 8.0 Y Y
Canon M3« »- n 3.0 1040 tilting Y 4000 4.2 Y n
Canon T6i« »optical n 3.0 1040 swivel Y 4000 5.0 Y n
Canon G5 X« »2360 n 3.0 1040 swivel Y 2000 5.9 Y Y
Canon T5i« »optical n 3.0 1040 swivel Y 4000 5.0 Y n
Panasonic FZ1000« »2359 n 3.0 921 swivel n 4000 12.0 Y Y
Ricoh GR II« »- n 3.0 1230 fixed n 4000 4.0 Y n
Ricoh GR« »- n 3.0 1230 fixed n 4000 4.0 Y n
Sony RX100 V« »2359 n 3.0 1229 tilting n 2000 24.0 Y Y
Sony RX100 IV« »2359 n 3.0 1228 tilting n 2000 16.0 Y Y
Sony A5100« »- n 3.0 922 tilting Y 4000 6.0 Y n
Sony RX100 II« »- n 3.0 1229 tilting n 2000 10.0 Y Y
Sony RX100« »- n 3.0 1229 fixed n 2000 10.0 Y Y

Both the RX100 III and the G7X have zoom lenses build in. The RX100 III has a 24-70mm f/1.8-2.8 optic and the G7X offers a 24-100mm f/1.8-2.8 (focal lengths in full frame equivalent terms). Hence, the Sony and Canon provide the same view at the wide-angle end, but the Canon has more tele-photo reach at the long end. Both cameras offer the same maximum aperture.

Both the RX100 III and the G7X have been discontinued, but can regularly be found used on eBay. The RX100 III was replaced by the Sony RX100 IV, while the G7X was followed by the Canon G7 X Mark II.

Review summary: Sony RX100 III vs Canon G7 X

So how do things add up? Is the Sony RX100 III better than the Canon G7 X or vice versa? A synthesis of the relative strong points of each of the models is listed below.

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Reasons to prefer the Sony Cyber-shot DSC-RX100 III:

  • Easier framing: Has an electronic viewfinder for image framing and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1229k vs 1040k dots).
  • Faster burst: Shoots at higher frequency (10 vs 6.5 flaps/sec) to capture the decisive moment.
  • Longer lasting: Can take more shots (320 versus 210) on a single battery charge.
  • More heavily discounted: Has been on the market for longer (launched in May 2014).

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Arguments in favor of the Canon PowerShot G7 X:

  • Better image quality: Scores markedly higher (4 points) in the DXO overall evaluation.
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • More tele-reach: Has a longer tele-lens for perspective compression and subject magnification.
  • More affordable: Was released into a lower priced segment (13 percent cheaper at launch).
  • More modern: Was introduced somewhat (4 months) more recently.

If the number of relative strengths (bullet points above) is taken as a guide, the match-up finishes in a tie (5 points each). 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.

RX100 III 05:05 G7X

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the RX100 III and the G7X in practical situations. 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 adjacent table relays the overall verdicts of several of the most popular 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 cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Sony RX100 III»HiRec82/1004.5/54.5/55/5 May 2014 799- i
Canon G7 X«HiRec77/1004.5/53.5/54.5/5 Sep 2014 699- i
Canon G7 X Mark II« »HiRec81/1004.5/54/54.5/5 Feb 2016 699 i i
Canon M3« »rev75/1004.5/54.5/54/5 Feb 2015 679- i
Canon T6i« »-75/1004.5/54.5/54.5/5 Feb 2015 749- i
Canon G5 X« »HiRec78/1004.5/54/54.5/5 Oct 2015 799 i i
Canon T5i« »-76/1004.5/54.5/54.5/5 Mar 2013 649- i
Panasonic FZ1000« »HiRec82/1004.5/54.5/54.5/5 Jun 2014 899- i
Ricoh GR II« »--4.5/54.5/54.5/5 Jun 2015 699- i
Ricoh GR« »-79/1004.5/54.5/54.5/5 Apr 2013 799- i
Sony RX100 V« »HiRec83/1004/55/54.5/5 Oct 2016 999 i i
Sony RX100 IV« »HiRec85/1004/54.5/54.5/5 Jun 2015 999- i
Sony A5100« »Rec-4.5/54.5/55/5 Aug 2014 549 i i
Sony RX100 II« »HiRec79/1004.5/55/54.5/5 Jun 2013 749- i
Sony RX100« »HiRec78/1004/55/55/5 Jun 2012 649- i

The above review scores should be interpreted with care, though. The ratings are only valid when refering to cameras in the same category and of the same age. Thus, a score needs to be put into the context of the launch date and the launch price 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. 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? In case you are interested in seeing how other cameras pair up, just make a corresponding selection in the search boxes below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored. If you cannot find the camera you are interested in, please send me an email, and I will try to update the database with the necessary infos.

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