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Canon 100D versus Nikon D3100

The Canon EOS 100D (called Canon SL1 in some regions) and the Nikon D3100 are two digital cameras that were revealed to the public, respectively, in March 2013 and August 2010. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The Canon has a resolution of 17.9 megapixel, whereas the Nikon provides 14.2 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 Nikon D3100

The side-by-side display below illustrates the physical size and weight of the Canon 100D and the Nikon D3100. 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 – the 100D – represents the basis or 100 percent across all the size and weight measures).

Compare Canon 100D vs Nikon D3100
Compare 100D versus D3100 top
Compare 100D and D3100 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Nikon D3100 is notably larger (12 percent) than the Canon 100D. Moreover, the D3100 is markedly heavier (24 percent) than the 100D. In this context, it is worth noting that neither the 100D nor the D3100 are weather-sealed.

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. Yet, since both cameras are based around an APS-C sensor, their respective lenses will tend to have similar dimensions and heft. You can find an overview of optics for the two cameras in the Canon EF Lens Catalog (100D) and the Nikon Lens Catalog (D3100).

Concerning battery life, the 100D gets 380 shots out of its LP-E12 battery, while the D3100 can take 550 images on a single charge of its EN-EL14 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
Nikon D3100« 4.9 in 3.8 in 3.0 in 17.8 oz 550 n Aug 2010 599- i Nikon D3100
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
Nikon D3200« » 4.9 in 3.8 in 3.0 in 17.8 oz 540 n Apr 2012 599- i Nikon D3200
Nikon D5100« » 5.0 in 3.8 in 3.1 in 19.8 oz 660 n Apr 2011 749- i Nikon D5100
Nikon D7000« » 5.2 in 4.1 in 3.0 in 27.5 oz 1050 Y Sep 2010 1,499- i Nikon D7000
Nikon D3000« » 5.0 in 3.8 in 2.5 in 18.9 oz 500 n Jul 2009 599- i Nikon D3000
Nikon D5000« » 5.0 in 4.1 in 3.1 in 20.8 oz 510 n Apr 2009 749- i Nikon D5000
Panasonic G6« » 4.8 in 3.3 in 2.8 in 13.8 oz 340 n Apr 2013 599- i Panasonic G6

The price is, of course, an important factor in any camera decision. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The 100D was somewhat cheaper (by 8 percent) than the D3100 at launch, but both cameras fall into the same price category. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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 Nikon D3100

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.

Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the D3100 is 7 percent bigger. As a result of these sensor size differences, the cameras have format factors, respectively, of 1.6 (100D) and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors.

Canon 100D and Nikon D3100 sensor measures

Despite having a smaller sensor, the Canon 100D offers a higher resolution of 17.9 megapixel, compared with 14.2 MP of the Nikon D3100. 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 4.31μm versus 5.01μm for the D3100). However, it should be noted that the 100D is much more recent (by 2 years and 7 months) than the D3100, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.

100D versus D3100 MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 D3100 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 0.7 bits higher color depth, and 0.1 stops in additional low light sensitivity. 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 100D» APS-C 17.9 5184 34561080/30p21.811.384363Canon 100D
Nikon D3100« APS-C 14.2 4608 30721080/24p22.511.391967Nikon D3100
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
Nikon D3200« » APS-C 24.1 6016 40001080/30p24.113.2113181Nikon D3200
Nikon D5100« » APS-C 16.1 4928 32641080/30p23.513.6118380Nikon D5100
Nikon D7000« » APS-C 16.1 4928 326410800/24p23.513.9116780Nikon D7000
Nikon D3000« » APS-C 10.0 3872 2592-22.311.156362Nikon D3000
Nikon D5000« » APS-C 12.2 4288 2848720/24p22.712.586872Nikon D5000
Panasonic G6« » Four Thirds 15.9 4608 34561080/60p21.311.563961Panasonic G6

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, but the 100D provides a higher frame rate than the D3100. It can shoot video footage at 1080/30p, while the Nikon is limited to 1080/24p.

 

Feature comparison: Canon 100D vs Nikon D3100

Apart from body and sensor, cameras can and do differ across a range of features. The 100D and the D3100 are similar in the sense that both have an optical viewfinder. The latter is useful for getting a clear image for framing even in brightly lit environments. The table below summarizes some of the other core capabilities of the Canon 100D and Nikon D3100 in connection with corresponding information for a sample of similar cameras. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.

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
Nikon D3100«optical n 3.0 230 fixed n 4000 3.0 Y n Nikon D3100
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
Nikon D3200« »optical n 3.0 921 fixed n 4000 4.0 Y n Nikon D3200
Nikon D5100« »optical n 3.0 921 swivel n 4000 4.0 Y n Nikon D5100
Nikon D7000« »optical Y 3.0 921 fixed n 8000 6.0 Y n Nikon D7000
Nikon D3000« »optical n 3.0 230 fixed n 4000 3.0 Y n Nikon D3000
Nikon D5000« »optical n 2.7 230 full-flex n 4000 4.0 Y n Nikon D5000
Panasonic G6« »1440 n 3.0 1036 swivel Y 4000 7.0 Y n Panasonic G6

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The 100D has a touchscreen, while the D3100 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

Both the 100D and the D3100 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 100D»YmonomonoY-mini2.0---Canon 100D
Nikon D3100«Ymonomono--mini2.0---Nikon D3100
Canon 4000D« »Ymonomono--mini2.0YY-Canon 4000D
Canon 200D« »YstereomonoY-mini2.0YYYCanon 200D
Canon 7D II« »YstereomonoYYmini3.0---Canon 7D II
Canon 1200D« »Ymonomono--mini2.0---Canon 1200D
Canon 700D« »YstereomonoY-mini2.0---Canon 700D
Canon G16« »Ystereomono--mini2.0Y--Canon G16
Canon 650D« »YstereomonoY-mini2.0---Canon 650D
Canon M« »YstereomonoY-mini2.0---Canon M
Canon 600D« »YmonomonoY-mini2.0---Canon 600D
Nikon D3200« »YmonomonoY-mini2.0---Nikon D3200
Nikon D5100« »YmonomonoY-mini2.0---Nikon D5100
Nikon D7000« »YmonomonoY-mini2.0---Nikon D7000
Nikon D3000« »Y-----2.0---Nikon D3000
Nikon D5000« »Ymonomono--mini2.0---Nikon D5000
Panasonic G6« »YstereomonoY-mini2.0YY-Panasonic G6

Both the 100D and the D3100 have been discontinued, but can regularly be found used on eBay. The D3100 was replaced by the Nikon D3200, while the 100D was followed by the Canon 200D.

Review summary: Canon 100D vs Nikon D3100

So what conclusions can be drawn? Is the Canon 100D better than the Nikon D3100 or vice versa? Below is a summary of the relative strengths of each of the two contestants.

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Reasons to prefer the Canon EOS 100D:

  • More detail: Offers more megapixels (17.9 vs 14.2MP) with a 12% higher linear resolution.
  • Better video: Provides higher movie framerates (1080/30p versus 1080/24p).
  • Better sound: Can connect to an external microphone for higher quality sound recording.
  • More detailed LCD: Has a higher resolution rear screen (1040k vs 230k dots).
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Faster burst: Shoots at higher frequency (4.9 vs 3 flaps/sec) to capture the decisive moment.
  • More compact: Is smaller (117x91mm vs 124x96mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 98g or 19 percent) and hence easier to carry around.
  • More modern: Reflects 2 years and 7 months of technical progress since the D3100 launch.

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Advantages of the Nikon D3100:

  • Better image quality: Scores markedly higher (4 points) in the DXO overall evaluation.
  • Longer lasting: Gets more shots (550 versus 380) out of a single battery charge.
  • More heavily discounted: Has been around for much longer (launched in August 2010).

If the count of individual advantages (bullet points above) is taken as a guide, the 100D is the clear winner of the match-up (9 : 3 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 09:03 D3100

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 100D or the D3100. 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). 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
Nikon D3100«HiRec72/1004.5/55/54.5/5 Aug 2010 599- i Nikon D3100
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
Nikon D3200« »HiRec73/1004.5/54.5/54.5/5 Apr 2012 599- i Nikon D3200
Nikon D5100« »HiRec76/1004.5/55/54.5/5 Apr 2011 749- i Nikon D5100
Nikon D7000« »-80/1004.5/55/54.5/5 Sep 2010 1,499- i Nikon D7000
Nikon D3000« »Rec72/1004/53.5/54.5/5 Jul 2009 599- i Nikon D3000
Nikon D5000« »HiRec75/1004/55/54.5/5 Apr 2009 749- i Nikon D5000
Panasonic G6« »HiRec-5/5-4.5/5 Apr 2013 599- i Panasonic G6

The above review scores should be interpreted with care, though. The assessments were made in relation to similar cameras of the same technological generation. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. 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? 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 locate and add the respective data to the application.

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