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Canon 100D versus Sony A9

The Canon EOS 100D (called Canon SL1 in some regions) and the Sony Alpha A9 are two digital cameras that were officially introduced, respectively, in March 2013 and April 2017. The 100D is a DSLR, while the A9 is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (100D) and a full frame (A9) sensor. The Canon has a resolution of 17.9 megapixel, whereas the Sony 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 100D vs Sony A9

The side-by-side display below illustrates the physical size and weight of the Canon 100D and the Sony A9. 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 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 100D – represents the basis or 100 percent across all the size and weight measures).

Compare Canon 100D vs Sony A9
Compare 100D versus A9 top
Compare 100D and A9 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A9 is notably larger (15 percent) than the Canon 100D. Moreover, the A9 is substantially heavier (65 percent) than the 100D. It is noteworthy in this context that the A9 is splash and dust-proof, while the 100D does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can find an overview of optics for the two cameras in the Canon EF Lens Catalog (100D) and the Sony FE Lens Catalog (A9). Mirrorless cameras, such as the A9, have moreover the advantage that they can use many lenses from other systems via adapters, as they have a relatively short flange to focal plane distance.

Concerning battery life, the 100D gets 380 shots out of its LP-E12 battery, while the A9 can take 650 images on a single charge of its NP-FZ100 power pack.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. In case you want to display and compare another camera duo, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.

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 A9« 5.0 in 3.8 in 2.5 in 23.7 oz 650 Y Apr 2017 4,499 i i Sony A9
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 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 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
Olympus E-M1 II« » 5.3 in 3.6 in 2.6 in 20.2 oz 440 Y Sep 2016 1,999 i i Olympus E-M1 II
Panasonic GH5« » 5.5 in 3.9 in 3.4 in 25.6 oz 410 Y Jan 2017 1,999 i i Panasonic GH5
Panasonic G6« » 4.8 in 3.3 in 2.8 in 13.8 oz 340 n Apr 2013 599- i Panasonic G6
Sony A7 III« » 5.0 in 3.8 in 2.9 in 22.9 oz 610 Y Feb 2018 1,999 i i Sony A7 III
Sony A7R III« » 5.0 in 3.8 in 2.9 in 22.9 oz 650 Y Oct 2017 3,199 i i Sony A7R III
Sony A7 II« » 5.0 in 3.8 in 2.4 in 21.1 oz 350 Y Nov 2014 1,999- i Sony A7 II

The camera’s price is obviously a critical decision-making factor. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The 100D was launched at a markedly lower price (by 88 percent) than the A9, which puts it into a different market segment. 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 100D vs Sony A9

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 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. 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 100D features an APS-C sensor and the Sony A9 a full frame sensor. The sensor area in the A9 is 155 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.6 and 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Canon 100D and Sony A9 sensor measures

With 24MP, the A9 offers a higher resolution than the 100D (17.9MP), but the A9 nevertheless has larger individual pixels (pixel pitch of 5.94μm versus 4.31μm for the 100D) due to its larger sensor. Moreover, the A9 is a much more recent model (by 4 years) than the 100D, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units.

100D versus A9 MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 A9 offers substantially better image quality than the 100D (overall score 29 points higher). The advantage is based on 3.1 bits higher color depth, 2 EV in additional dynamic range, and 2.1 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
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 A9« Full Frame 24.0 6000 40004K/30p24.913.3351792Sony A9
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 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 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
Olympus E-M1 II« » Four Thirds 20.2 5184 38884K/30p23.712.8131280Olympus E-M1 II
Panasonic GH5« » Four Thirds 20.2 5184 38884K/60p23.913.080777Panasonic GH5
Panasonic G6« » Four Thirds 15.9 4608 34561080/60p21.311.563961Panasonic G6
Sony A7 III« » Full Frame 24.0 6000 40004K/30p25.014.7373096Sony A7 III
Sony A7R III« » Full Frame 42.2 7952 53044K/30p26.014.73523100Sony A7R III
Sony A7 II« » Full Frame 24.0 6000 40001080/60p24.913.6244990Sony A7 II

Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the A9 provides a better video resolution than the 100D. It can shoot movie footage at 4K/30p, while the Canon is limited to 1080/30p.

 

Feature comparison: Canon 100D vs Sony A9

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the A9 has an electronic viewfinder (3686k 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 following table reports on some other key feature differences and similarities of the Canon 100D, the Sony A9, and comparable cameras. 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 A9«3686 n 3.0 1440 tilting Y 8000 20.0 n Y Sony A9
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 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 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
Olympus E-M1 II« »2360 n 3.0 1037 swivel Y 8000 18.0 n Y Olympus E-M1 II
Panasonic GH5« »3680 n 3.2 1620 swivel Y 8000 12.0 n Y Panasonic GH5
Panasonic G6« »1440 n 3.0 1036 swivel Y 4000 7.0 Y n Panasonic G6
Sony A7 III« »2359 n 3.0 922 tilting Y 8000 10.0 n Y Sony A7 III
Sony A7R III« »3686 n 3.0 1440 tilting Y 8000 10.0 n Y Sony A7R III
Sony A7 II« »2400 n 3.0 1230 tilting n 8000 5.0 n Y Sony A7 II

One difference between the cameras concerns the presence of an on-board flash. The 100D has one, while the A9 does not. While the build-in flash of the 100D is not very powerful, it can at times be useful as a fill-in light.

The reported shutter speed and shutter burst refer to the use of the mechanical shutter. In addition, the A9 features an electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (rolling shutter) or shooting under artificial light sources (flickering).

The A9 is a current model that online retailers, such as amazon, will have in stock. In contrast, the 100D has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the 100D was succeeded by the Canon 200D.

Review summary: Canon 100D vs Sony A9

So how do things add up? Which of the two cameras – the Canon 100D or the Sony A9 – has the upper hand? The listing below highlights the relative strengths of the two models.

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Reasons to prefer the Canon EOS 100D:

  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • More compact: Is smaller (117x91mm vs 127x96mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 266g or 40 percent) and hence easier to carry around.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More affordable: Was introduced into a lower priced category (88 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in March 2013).

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Arguments in favor of the Sony Alpha A9:

  • More detail: Has more megapixels (24 vs 17.9MP), which boosts linear resolution by 16%.
  • Better image quality: Scores substantially higher (29 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (3.1 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (2 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (2.1 stops ISO advantage).
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/30p).
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • More detailed LCD: Has a higher resolution rear screen (1440k vs 1040k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
  • Faster burst: Shoots at higher frequency (20 vs 4.9 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Longer lasting: Gets more shots (650 versus 380) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • Sharper images: Has stabilization technology build-in to reduce the impact of hand-shake.
  • More modern: Reflects 4 years of technical progress since the 100D launch.

If the count of individual advantages (bullet points above) is taken as a guide, the A9 is the clear winner of the contest (17 : 6 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.

100D 06:17 A9

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the 100D and the A9 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 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
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 A9«HiRec89/1005/55/55/5 Apr 2017 4,499 i i Sony A9
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 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 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
Olympus E-M1 II« »HiRec85/1004.5/55/54.5/5 Sep 2016 1,999 i i Olympus E-M1 II
Panasonic GH5« »HiRec85/1004.5/55/55/5 Jan 2017 1,999 i i Panasonic GH5
Panasonic G6« »HiRec-5/5-4.5/5 Apr 2013 599- i Panasonic G6
Sony A7 III« »HiRec89/1005/55/55/5 Feb 2018 1,999 i i Sony A7 III
Sony A7R III« »HiRec90/1004.5/55/55/5 Oct 2017 3,199 i i Sony A7R III
Sony A7 II« »Rec82/1004.5/55/55/5 Nov 2014 1,999- i Sony A7 II

The review scores listed above should be treated with care, 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 make a corresponding selection in the search boxes below. An an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool. If you do not see the camera that you are looking for, please send me an email, and I will try to update the database with the necessary infos.

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