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Sony RX100 III versus Canon M100

The Sony Cyber-shot DSC-RX100 III and the Canon EOS M100 are two digital cameras that were officially introduced, respectively, in May 2014 and August 2017. The RX100 III is a fixed lens compact, while the M100 is a mirrorless interchangeable lens camera. The cameras are based on an one-inch (RX100 III) and an APS-C (M100) sensor. The Sony has a resolution of 20 megapixel, whereas the Canon 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: Sony RX100 III vs Canon M100

The physical size and weight of the Sony RX100 III and the Canon M100 are illustrated in the side-by-side display below. Three consecutive perspectives from the front, the top, and the back are presented. All width, height and depth dimensions are rounded to the nearest millimeter. You can also toggle the display 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 the basis or 100 percent across all the size and weight measures).

Snapsort Sony RX100 III vs Canon M100
Compare RX100 III versus M100 top
Compare RX100 III and M100 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon M100 is notably larger (22 percent) than the Sony RX100 III. In this context, it is worth noting that neither the RX100 III nor the M100 are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the RX100 III has a lens build in, whereas the M100 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup.

Concerning battery life, the RX100 III gets 320 shots out of its NP-BX1 battery, while the M100 can take 295 images on a single charge of its LP-E12 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 M100« 4.3 in 2.6 in 1.4 in 10.7 oz 295 n Aug 2017 499 i i
Canon M6« » 4.4 in 2.7 in 1.8 in 13.8 oz 295 n Feb 2017 779 i i
Canon M5« » 4.6 in 3.5 in 2.4 in 15.1 oz 295 n Sep 2016 979 i i
Canon M10« » 4.3 in 2.6 in 1.4 in 10.6 oz 255 n Oct 2015 499- i
Canon M3« » 4.4 in 2.7 in 1.7 in 12.9 oz 250 n Feb 2015 679- i
Canon G5 X« » 4.4 in 3.0 in 1.7 in 12.5 oz 210 n Oct 2015 799 i i
Canon G7 X« » 4.1 in 2.4 in 1.6 in 10.7 oz 210 n Sep 2014 699- i
Canon M« » 4.3 in 2.6 in 1.3 in 10.5 oz 230 n Jul 2012 599- 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. 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 M100

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. 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 Sony RX100 III features an one-inch sensor and the Canon M100 an APS-C sensor. The sensor area in the M100 is 186 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.7 and 1.6. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Sony RX100 III and Canon M100 sensor measures

With 24MP, the M100 offers a higher resolution than the RX100 III (20MP), but the M100 nevertheless has larger individual pixels (pixel pitch of 3.72μm versus 2.41μm for the RX100 III) due to its larger sensor. Moreover, the M100 is a much more recent model (by 3 years and 3 months) than the RX100 III, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units.

RX100 III versus M100 MP

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"). Of the two cameras under consideration, the M100 offers substantially better image quality than the RX100 III (overall score 11 points higher). The advantage is based on 1.1 bits higher color depth, 0.6 EV in additional dynamic range, and 1.4 stops in additional low light sensitivity. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

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 M100« APS-C 24.0 6000 40001080/60p23.512.9127278
Canon M6« » APS-C 24.0 6000 40001080/60p----
Canon M5« » APS-C 24.0 6000 40001080/60p23.412.4126277
Canon M10« » APS-C 17.9 5184 34561080/30p22.211.475365
Canon M3« » APS-C 24.0 6000 40001080/30p22.811.8116972
Canon G5 X« » 1-inch 20.0 5472 36481080/60p----
Canon G7 X« » 1-inch 20.0 5472 36481080/60p23.012.755671
Canon M« » APS-C 17.9 5184 34561080/30p22.111.282765
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 cannot only take still pictures, but also record videos. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, and both provide the same movie specifications (1080/60p).

 

Feature comparison: Sony RX100 III vs Canon M100

Apart from body and sensor, cameras can and do differ across a variety 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 M100 relies on live view and the rear LCD for framing. The adjacent table lists some of the other core features of the Sony RX100 III and Canon M100 along with similar information for a selection of comparators. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.

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 M100«- n 3.0 1040 tilting Y 4000 6.1 Y n
Canon M6« »- n 3.0 1040 tilting Y 4000 9.0 Y n
Canon M5« »2360 n 3.2 1620 tilting Y 4000 9.0 Y n
Canon M10« »- n 3.0 1040 tilting Y 4000 4.6 Y n
Canon M3« »- n 3.0 1040 tilting Y 4000 4.2 Y n
Canon G5 X« »2360 n 3.0 1040 swivel Y 2000 5.9 Y Y
Canon G7 X« »- n 3.0 1040 tilting Y 2000 6.5 Y Y
Canon M« »- n 3.0 1040 fixed Y 4000 4.3 n 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

The M100 is a current model that online retailers, such as amazon, will have in stock. In contrast, the RX100 III has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the RX100 III was succeeded by the Sony RX100 IV.

Review summary: Sony RX100 III vs Canon M100

So what is the bottom line? Which of the two cameras – the Sony RX100 III or the Canon M100 – has the upper hand? The listing below highlights the relative strengths of the two models.

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Advantages of 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 6.1 flaps/sec) to capture the decisive moment.
  • Ready to shoot: Has a lens build-in, whereas the M100 requires a separate lens.
  • More compact: Is smaller (102x58mm vs 108x67mm) and thus needs less room in the bag.
  • Less heavy: Is lighter even though it comes with a build-in lens (unlike the M100).
  • Sharper images: Has hand-shake reducing image stabilization build-in.
  • More heavily discounted: Has been available for much longer (launched in May 2014).

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Arguments in favor of the Canon EOS M100:

  • More detail: Has more megapixels (24 vs 20MP), which boosts linear resolution by 10%.
  • Better image quality: Scores substantially higher (11 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (1.1 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (0.6 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (1.4 stops ISO advantage).
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Faster shutter: Has higher mechanical shutter speed (4000/sec vs 2000/sec) to freeze action.
  • More flexible: Takes interchangeable lenses and can thus be used with specialty optics.
  • More modern: Reflects 3 years and 3 months of technical progress since the RX100 III launch.

If the count of relative strengths (bullet points above) is taken as a measure, the M100 comes out slightly ahead of the RX100 III (9 : 8 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.

RX100 III 08:09 M100

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 handling experience and imaging performance when actually working with the RX100 III or the M100. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased. This is where reviews by experts come in. The following table reports the overall rankings of the cameras as published by some of the major camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). The full reviews are available 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 M100«Rec-4/5-3.5/5 Aug 2017 499 i i
Canon M6« »-80/1004/54.5/54/5 Feb 2017 779 i i
Canon M5« »Rec82/1004/54.5/54/5 Sep 2016 979 i i
Canon M10« »---rev4/5 Oct 2015 499- i
Canon M3« »rev75/1004.5/54.5/54/5 Feb 2015 679- i
Canon G5 X« »HiRec78/1004.5/54/54.5/5 Oct 2015 799 i i
Canon G7 X« »HiRec77/1004.5/53.5/54.5/5 Sep 2014 699- i
Canon M« »Rec-4/53.5/54/5 Jul 2012 599- 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 assessments were made in relation to similar cameras of the same technological generation. 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. 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? 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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