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Canon 100D versus Sony RX100 III

The Canon EOS 100D (called Canon SL1 in some regions) and the Sony Cyber-shot DSC-RX100 III are two digital cameras that were officially introduced, respectively, in March 2013 and May 2014. The 100D is a DSLR, while the RX100 III is a fixed lens compact. The cameras are based on an APS-C (100D) and an one-inch (RX100 III) sensor. The Canon has a resolution of 17.9 megapixel, whereas the Sony provides 20 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 100D vs Sony RX100 III

The side-by-side display below illustrates the physical size and weight of the Canon 100D and the Sony RX100 III. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth dimensions are rounded to the nearest millimeter. If you prefer, you can also use the toggle button to switch to a comparison in percentage terms (in this case, the camera on the left – the 100D – represents the basis or 100 percent across all the size and weight measures).

Compare Canon 100D vs Sony RX100 III
Compare 100D versus RX100 III top
Compare 100D and RX100 III rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony RX100 III is considerably smaller (44 percent) than the Canon 100D. In this context, it is worth noting that neither the 100D nor the RX100 III 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 100D is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can find an overview of optics for the 100D and their specifications in the Canon EF Lens Catalog.

Concerning battery life, the 100D gets 380 shots out of its LP-E12 battery, while the RX100 III can take 320 images on a single charge of its NP-BX1 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)
Camera
Model
Canon 100D» 4.6 in 3.6 in 2.7 in 14.4 oz 380 n Mar 2013 549- i Canon 100D
Sony RX100 III« 4.0 in 2.3 in 1.6 in 10.2 oz 320 n May 2014 799- i Sony RX100 III
Canon 4000D« » 5.1 in 4.0 in 3.0 in 15.4 oz 500 n Feb 2018 399 i i Canon 4000D
Canon 200D« » 4.8 in 3.7 in 2.8 in 16.0 oz 650 n Jun 2017 549 i i Canon 200D
Canon G5 X« » 4.4 in 3.0 in 1.7 in 12.5 oz 210 n Oct 2015 799 i i Canon G5 X
Canon 7D II« » 5.9 in 4.4 in 3.1 in 32.1 oz 670 Y Sep 2014 1,799 i i Canon 7D II
Canon 1200D« » 5.1 in 3.9 in 3.1 in 16.9 oz 500 n Feb 2014 449- i Canon 1200D
Canon G7 X« » 4.1 in 2.4 in 1.6 in 10.7 oz 210 n Sep 2014 699- i Canon G7 X
Canon 700D« » 5.2 in 3.9 in 3.1 in 20.5 oz 440 n Mar 2013 649- i Canon 700D
Canon G16« » 4.3 in 3.0 in 1.6 in 12.6 oz 360 n Aug 2013 549 i i Canon G16
Canon 650D« » 5.2 in 3.9 in 3.1 in 20.3 oz 440 n Jun 2012 849- i Canon 650D
Canon M« » 4.3 in 2.6 in 1.3 in 10.5 oz 230 n Jul 2012 599- i Canon M
Canon 600D« » 5.2 in 3.9 in 3.1 in 20.1 oz 440 n Feb 2011 599- i Canon 600D
Panasonic FZ1000« » 5.4 in 3.9 in 5.2 in 29.3 oz 360 n Jun 2014 899- i Panasonic FZ1000
Panasonic G6« » 4.8 in 3.3 in 2.8 in 13.8 oz 340 n Apr 2013 599- i Panasonic G6
Sony RX100 IV« » 4.0 in 2.3 in 1.6 in 10.5 oz 280 n Jun 2015 999- i Sony RX100 IV
Sony RX100 II« » 4.0 in 2.3 in 1.5 in 9.9 oz 350 n Jun 2013 749- i Sony RX100 II

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: Canon 100D vs Sony RX100 III

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better 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.

Of the two cameras under consideration, the Canon 100D features an APS-C sensor and the Sony RX100 III an one-inch sensor. The sensor area in the RX100 III is 65 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.6 and 2.7. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Canon 100D and Sony RX100 III sensor measures

Despite having a smaller sensor, the RX100 III offers a higher resolution of 20 megapixel, compared with 17.9 MP of the 100D. This megapixel advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 2.41μm versus 4.31μm for the 100D). However, it should be noted that the RX100 III is a somewhat more recent model (by 1 year and 1 month) than the 100D, and its sensor might have benefitted from technological advances during this time that partly offset its pixel-size disadvantage.

100D versus RX100 III MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). Of the two cameras under consideration, the RX100 III has a markedly higher DXO score than the 100D (overall score 4 points higher), which will translate into better image quality. The advantage is based on 0.6 bits higher color depth, 1 EV in additional dynamic range, 0.8 stops of reduced 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
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Canon 100D» APS-C 17.9 5184 34561080/30p21.811.384363Canon 100D
Sony RX100 III« 1-inch 20.0 5472 36481080/60p22.412.349567Sony RX100 III
Canon 4000D« » APS-C 17.9 5184 34561080/30p21.911.469563Canon 4000D
Canon 200D« » APS-C 24.0 6000 40001080/60p23.613.4104179Canon 200D
Canon G5 X« » 1-inch 20.0 5472 36481080/60p----Canon G5 X
Canon 7D II« » APS-C 20.0 5472 36481080/60p22.411.8108270Canon 7D II
Canon 1200D« » APS-C 17.9 5184 34561080/30p21.911.372463Canon 1200D
Canon G7 X« » 1-inch 20.0 5472 36481080/60p23.012.755671Canon G7 X
Canon 700D« » APS-C 17.9 5184 34561080/30p21.711.268161Canon 700D
Canon G16« » 1/1.7 12.0 4000 30001080/60p21.011.723054Canon G16
Canon 650D« » APS-C 17.9 5184 34561080/30p21.711.272262Canon 650D
Canon M« » APS-C 17.9 5184 34561080/30p22.111.282765Canon M
Canon 600D« » APS-C 17.9 5184 34561080/30p22.111.579365Canon 600D
Panasonic FZ1000« » 1-inch 20.0 5472 36484K/30p22.111.751764Panasonic FZ1000
Panasonic G6« » Four Thirds 15.9 4608 34561080/60p21.311.563961Panasonic G6
Sony RX100 IV« » 1-inch 20.0 5472 36484K/30p22.812.659170Sony RX100 IV
Sony RX100 II« » 1-inch 20.0 5472 36481080/60p22.512.448367Sony RX100 II

Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the RX100 III provides a faster frame rate than the 100D. It can shoot movie footage at 1080/60p, while the Canon is limited to 1080/30p.

 

Feature comparison: Canon 100D vs Sony RX100 III

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), while the 100D has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The adjacent table lists some of the other core features of the Canon 100D and Sony RX100 III along with similar information for a selection of comparators. If you need more detail on the specs, you can find comprehensive listings, for example, 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 100D»optical n 3.0 1040 fixed Y 4000 4.9 Y n Canon 100D
Sony RX100 III«1440 n 3.0 1229 tilting n 2000 10.0 Y Y Sony RX100 III
Canon 4000D« »optical n 2.7 230 fixed n 4000 3.0 Y n Canon 4000D
Canon 200D« »optical n 3.0 1040 swivel Y 4000 5.0 Y n Canon 200D
Canon G5 X« »2360 n 3.0 1040 swivel Y 2000 5.9 Y Y Canon G5 X
Canon 7D II« »optical Y 3.0 1040 fixed n 8000 10.0 Y n Canon 7D II
Canon 1200D« »optical n 3.0 460 fixed n 4000 3.0 Y n Canon 1200D
Canon G7 X« »- n 3.0 1040 tilting Y 2000 6.5 Y Y Canon G7 X
Canon 700D« »optical n 3.0 1040 swivel Y 4000 5.0 Y n Canon 700D
Canon G16« »optical n 3.0 922 fixed n 4000 2.2 Y Y Canon G16
Canon 650D« »optical n 3.0 1040 swivel Y 4000 5.0 Y n Canon 650D
Canon M« »- n 3.0 1040 fixed Y 4000 4.3 n n Canon M
Canon 600D« »optical n 3.0 1040 swivel n 4000 3.7 Y n Canon 600D
Panasonic FZ1000« »2359 n 3.0 921 swivel n 4000 12.0 Y Y Panasonic FZ1000
Panasonic G6« »1440 n 3.0 1036 swivel Y 4000 7.0 Y n Panasonic G6
Sony RX100 IV« »2359 n 3.0 1228 tilting n 2000 16.0 Y Y Sony RX100 IV
Sony RX100 II« »- n 3.0 1229 tilting n 2000 10.0 Y Y Sony RX100 II

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The 100D has a touchscreen, while the RX100 III has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point or for making menu selections.

Both the 100D and the RX100 III have been discontinued, but can regularly be found used on eBay. The 100D was replaced by the Canon 200D, while the RX100 III was followed by the Sony RX100 IV.

Review summary: Canon 100D vs Sony RX100 III

So what conclusions can be drawn? Is the Canon 100D better than the Sony RX100 III or vice versa? A synthesis of the relative strong points of each of the models is listed below.

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Arguments in favor of the Canon EOS 100D:

  • Better low-light sensitivity: Requires less light for good images (0.8 stops ISO advantage).
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Faster shutter: Has higher mechanical shutter speed (4000/sec vs 2000/sec) to freeze action.
  • More flexible: Can take a variety of interchangeable lenses, including specialty optics.
  • Longer lasting: Can take more shots (380 versus 320) on a single battery charge.
  • More heavily discounted: Has been on the market for longer (launched in March 2013).

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Advantages of the Sony Cyber-shot DSC-RX100 III:

  • More detail: Has more megapixels (20 vs 17.9MP), which boosts linear resolution by 6%.
  • Better image quality: Scores markedly higher (4 points) in the DXO overall evaluation.
  • More dynamic range: Captures a broader range of light and dark details (1 EV of extra DR).
  • Better video: Provides higher movie framerates (1080/60p versus 1080/30p).
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • More detailed LCD: Has a higher resolution rear screen (1229k vs 1040k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Faster burst: Shoots at higher frequency (10 vs 4.9 flaps/sec) to capture the decisive moment.
  • Ready to shoot: Comes with an integrated lens, while the 100D requires a separate lens.
  • More compact: Is smaller (102x58mm vs 117x91mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight even though it has a lens build in (unlike the 100D).
  • Sharper images: Has stabilization technology build-in to reduce the impact of hand-shake.
  • More modern: Was introduced somewhat (1 year and 1 month) more recently.

If the count of relative strengths (bullet points above) is taken as a measure, the RX100 III is the clear winner of the contest (13 : 7 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.

100D 07:13 RX100 III

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the 100D and the RX100 III in practical situations. 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 why expert reviews are important. 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). You can find the full text of the reviews 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 100D»Rec78/1004/54/54/5 Mar 2013 549- i Canon 100D
Sony RX100 III«HiRec82/1004.5/54.5/55/5 May 2014 799- i Sony RX100 III
Canon 4000D« »rev-3.5/5-3.5/5 Feb 2018 399 i i Canon 4000D
Canon 200D« »HiRec78/1004.5/54.5/54.5/5 Jun 2017 549 i i Canon 200D
Canon G5 X« »HiRec78/1004.5/54/54.5/5 Oct 2015 799 i i Canon G5 X
Canon 7D II« »Rec84/1004/55/54.5/5 Sep 2014 1,799 i i Canon 7D II
Canon 1200D« »Rec-4/54/54.5/5 Feb 2014 449- i Canon 1200D
Canon G7 X« »HiRec77/1004.5/53.5/54.5/5 Sep 2014 699- i Canon G7 X
Canon 700D« »-76/1004.5/54.5/54.5/5 Mar 2013 649- i Canon 700D
Canon G16« »Rec-4.5/54.5/54.5/5 Aug 2013 549 i i Canon G16
Canon 650D« »HiRec77/1004.5/54.5/54.5/5 Jun 2012 849- i Canon 650D
Canon M« »Rec-4/53.5/54/5 Jul 2012 599- i Canon M
Canon 600D« »rev77/1004.5/55/54.5/5 Feb 2011 599- i Canon 600D
Panasonic FZ1000« »HiRec82/1004.5/54.5/54.5/5 Jun 2014 899- i Panasonic FZ1000
Panasonic G6« »HiRec-5/5-4.5/5 Apr 2013 599- i Panasonic G6
Sony RX100 IV« »HiRec85/1004/54.5/54.5/5 Jun 2015 999- i Sony RX100 IV
Sony RX100 II« »HiRec79/1004.5/55/54.5/5 Jun 2013 749- i Sony RX100 II

Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. 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, 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 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 contact me, and I will try to update the database with the necessary infos.

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