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Canon M3 vs T7i

The Canon EOS M3 and the Canon EOS Rebel T7i (labelled Canon 800D in some countries) are two digital cameras that were announced, respectively, in February 2015 and February 2017. The M3 is a mirrorless interchangeable lens camera, while the T7i is a DSLR. Both cameras are equipped with an APS-C sensor. Both cameras offer a resolution of 24 megapixels.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Canon M3   Canon T7i
Canon M3 Canon T7i
Mirrorless system camera Digital single lens reflex
Canon EF-M mount lenses Canon EF mount lenses
24 MP, APS-C Sensor 24 MP, APS-C Sensor
1080/30p Video 1080/60p Video
ISO 100-12800 (100-25600) ISO 100-25600 (100-51200)
Viewfinder optional Optical viewfinder
3.0" LCD, 1040k dots 3.0" LCD, 1040k dots
Tilting touchscreen Swivel touchscreen
4.2 shutter flaps per second 6 shutter flaps per second
250 shots per battery charge600 shots per battery charge
111 x 68 x 44 mm, 366 g 131 x 100 x 76 mm, 532 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS M3 and the Canon EOS Rebel T7i? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.

Body comparison: Canon M3 vs T7i

The physical size and weight of the Canon M3 and the Canon T7i are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size dimensions are rounded to the nearest millimeter.

The M3 can be obtained in two different colors (black, white), while the T7i is only available in black.

Size Canon M3 vs Canon T7i
Compare M3 versus T7i top
Comparison M3 or T7i rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon T7i is considerably larger (74 percent) than the Canon M3. Moreover, the T7i is substantially heavier (45 percent) than the M3. In this context, it is worth noting that neither the M3 nor the T7i 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. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

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 M3» 4.4 in 2.7 in 1.7 in 12.9 oz 250 n Feb 2015 679- i Canon M3
 
Canon T7i« 5.2 in 3.9 in 3.0 in 18.8 oz 600 n Feb 2017 749 i i Canon T7i
 
Canon M50« » 4.6 in 3.5 in 2.3 in 13.8 oz 235 n Feb 2018 779 i i Canon M50
 
Canon 77D« » 5.2 in 3.9 in 3.0 in 19.0 oz 600 n Feb 2017 899 i i Canon 77D
 
Canon M6« » 4.4 in 2.7 in 1.8 in 13.8 oz 295 n Feb 2017 779 i i Canon M6
 
Canon M100« » 4.3 in 2.6 in 1.4 in 10.7 oz 295 n Aug 2017 499 i i Canon M100
 
Canon SL2« » 4.8 in 3.7 in 2.8 in 16.0 oz 650 n Jun 2017 549- i Canon SL2
 
Canon M5« » 4.6 in 3.5 in 2.4 in 15.1 oz 295 n Sep 2016 979 i i Canon M5
 
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 M10« » 4.3 in 2.6 in 1.4 in 10.6 oz 255 n Oct 2015 499- i Canon M10
 
Canon T6i« » 5.2 in 4.0 in 3.1 in 19.6 oz 440 n Feb 2015 749- i Canon T6i
 
Canon T6s« » 5.2 in 4.0 in 3.1 in 19.9 oz 440 n Feb 2015 649- i Canon T6s
 
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 T5i« » 5.2 in 3.9 in 3.1 in 20.5 oz 440 n Mar 2013 649- i Canon T5i
 
Canon M« » 4.3 in 2.6 in 1.3 in 10.5 oz 230 n Jul 2012 599- i Canon M
Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.

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 M3 was somewhat cheaper (by 9 percent) than the T7i 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

 

Sensor comparison: Canon M3 vs T7i

The size of the sensor inside a digital camera is one of the key determinants 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 associated with larger, more expensive camera bodies and lenses.

Both cameras under consideration feature an APS-C sensor and have a format factor (sometimes also referred to as "crop factor") of 1.6. 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.

Technology-wise, the T7i uses a more advanced image processing engine (DIGIC 7) than the M3 (DIGIC 6), with benefits for noise reduction, color accuracy, and processing speed.

Canon M3 and Canon T7i sensor measures

The two cameras under review do not only share the same sensor size, but also offer an identical resolution of 24 megapixels. This similarity in sensor specs implies that both the M3 and the T7i have the same pixel density, as well as the same pixel size. It should, however, be noted that the T7i is much more recent (by 2 years) than the M3, and its sensor will have benefitted from technological advances during this time.

The Canon EOS M3 has a native sensitivity range from ISO 100 to ISO 12800, which can be extended to ISO 100-25600. The corresponding ISO settings for the Canon EOS Rebel T7i are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 100-51200.

M3 versus T7i 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. 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 M3» APS-C 24.0 6000 40001080/30p22.811.8116972Canon M3
 
Canon T7i« APS-C 24.0 6000 40001080/60p----Canon T7i
 
Canon M50« » APS-C 24.0 6000 40004K/24p----Canon M50
 
Canon 77D« » APS-C 24.0 6000 40001080/60p23.613.397178Canon 77D
 
Canon M6« » APS-C 24.0 6000 40001080/60p----Canon M6
 
Canon M100« » APS-C 24.0 6000 40001080/60p23.512.9127278Canon M100
 
Canon SL2« » APS-C 24.0 6000 40001080/60p23.613.4104179Canon SL2
 
Canon M5« » APS-C 24.0 6000 40001080/60p23.412.4126277Canon M5
 
Canon G5 X« » 1-inch 20.0 5472 36481080/60p----Canon G5 X
 
Canon M10« » APS-C 17.9 5184 34561080/30p22.211.475365Canon M10
 
Canon T6i« » APS-C 24.0 6000 40001080/60p22.712.091971Canon T6i
 
Canon T6s« » APS-C 24.0 6000 40001080/30p22.612.091570Canon T6s
 
Canon G7 X« » 1-inch 20.0 5472 36481080/60p23.012.755671Canon G7 X
 
Canon T5i« » APS-C 17.9 5184 34561080/30p21.711.268161Canon T5i
 
Canon M« » APS-C 17.9 5184 34561080/30p22.111.282765Canon M

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 T7i provides a faster frame rate than the M3. It can shoot movie footage at 1080/60p, while the M3 is limited to 1080/30p.

 

Feature comparison: Canon M3 vs T7i

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the T7i has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the M3 relies on live view and the rear LCD for framing. That said, the M3 can be equipped with an optional viewfinder – the EVF-DC1. The adjacent table lists some of the other core features of the Canon M3 and Canon T7i along with similar information for a selection of comparators.

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)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
Camera
Model
 
Canon M3»- n 3.0 1040 tilting Y 1/4000s 4.2 Y n Canon M3
 
Canon T7i«optical n 3.0 1040 swivel Y 1/4000s 6.0 Y n Canon T7i
 
Canon M50« »2360 n 3.0 1040 swivel Y 1/4000s 10.0 Y n Canon M50
 
Canon 77D« »optical Y 3.0 1040 swivel Y 1/4000s 6.0 Y n Canon 77D
 
Canon M6« »- n 3.0 1040 tilting Y 1/4000s 9.0 Y n Canon M6
 
Canon M100« »- n 3.0 1040 tilting Y 1/4000s 6.1 Y n Canon M100
 
Canon SL2« »optical n 3.0 1040 swivel Y 1/4000s 5.0 Y n Canon SL2
 
Canon M5« »2360 n 3.2 1620 tilting Y 1/4000s 9.0 Y n Canon M5
 
Canon G5 X« »2360 n 3.0 1040 swivel Y 1/2000s 5.9 Y Y Canon G5 X
 
Canon M10« »- n 3.0 1040 tilting Y 1/4000s 4.6 Y n Canon M10
 
Canon T6i« »optical n 3.0 1040 swivel Y 1/4000s 5.0 Y n Canon T6i
 
Canon T6s« »optical Y 3.0 1040 swivel Y 1/4000s 5.0 Y n Canon T6s
 
Canon G7 X« »- n 3.0 1040 tilting Y 1/2000s 6.5 Y Y Canon G7 X
 
Canon T5i« »optical n 3.0 1040 swivel Y 1/4000s 5.0 Y n Canon T5i
 
Canon M« »- n 3.0 1040 fixed Y 1/4000s 4.3 n n Canon M
Both cameras have an articulated rear screen that can be turned to be front-facing. This feature will be particularly appreciated by vloggers and photographers who are interested in taking selfies.

Concerning the storage of imaging data, both the M3 and the T7i write their files to SDXC cards. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.

 

Connectivity comparison: Canon M3 vs T7i

For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Canon EOS M3 and Canon EOS Rebel T7i and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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 M3»YstereomonoY-mini2.0YY-Canon M3
 
Canon T7i«YstereomonoY-mini2.0YYYCanon T7i
 
Canon M50« »YstereomonoY-micro2.0YYYCanon M50
 
Canon 77D« »YstereomonoY-mini2.0YYYCanon 77D
 
Canon M6« »YstereomonoY-mini2.0YYYCanon M6
 
Canon M100« »-stereomono--mini2.0YYYCanon M100
 
Canon SL2« »YstereomonoY-mini2.0YYYCanon SL2
 
Canon M5« »YstereomonoY-mini2.0YYYCanon M5
 
Canon G5 X« »Ystereomono--mini2.0YY-Canon G5 X
 
Canon M10« »-stereomono--mini2.0YY-Canon M10
 
Canon T6i« »YstereomonoY-mini2.0YY-Canon T6i
 
Canon T6s« »YstereomonoY-mini2.0YY-Canon T6s
 
Canon G7 X« »-stereomono--micro2.0YY-Canon G7 X
 
Canon T5i« »YstereomonoY-mini2.0---Canon T5i
 
Canon M« »YstereomonoY-mini2.0---Canon M

The T7i is a recent model that features in the current product line-up of Canon. In contrast, the M3 has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the M3 was succeeded by the Canon M6. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon website.


Review summary: Canon M3 vs T7i

So what conclusions can be drawn? Is there a clear favorite between the Canon M3 and the Canon T7i? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.


Arguments in favor of the Canon EOS M3:

  • More compact: Is smaller (111x68mm vs 131x100mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 166g or 31 percent) and hence easier to carry around.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • More heavily discounted: Has been available for much longer (launched in February 2015).


Advantages of the Canon EOS Rebel T7i:

  • Better jpgs: Has a more modern image processing engine (DIGIC 7 vs DIGIC 6).
  • Better video: Provides higher movie framerates (1080/60p versus 1080/30p).
  • Easier framing: Has an optical viewfinder for image framing and settings control.
  • More flexible LCD: Has swivel screen for odd-angle shots in portrait or landscape orientation.
  • Faster burst: Shoots at higher frequency (6 vs 4.2 flaps/sec) to capture the decisive moment.
  • Longer lasting: Gets more shots (600 versus 250) out of a single battery charge.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • More modern: Reflects 2 years of technical progress since the M3 launch.

If the count of individual advantages (bullet points above) is taken as a guide, the T7i is the clear winner of the contest (8 : 4 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. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

M3 04:08 T7i

How about other alternatives? Do the specifications of the Canon M3 and the Canon T7i place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best DSLR Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it says little about, for example, the shooting experience and imaging performance of the M3 and the T7i in practical situations. 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.

Expert reviews: Canon M3 vs T7i

This is where reviews by experts come in. The adjacent summary-table relays the overall verdicts of several of the most popular camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

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 M3»o75/1004.5/54.5/54/5 Feb 2015 679- i Canon M3
 
Canon T7i«-80/1004.5/54/54/5 Feb 2017 749 i i Canon T7i
 
Canon M50« »+79/100-4/53.5/5 Feb 2018 779 i i Canon M50
 
Canon 77D« »-82/1004.5/54.5/54/5 Feb 2017 899 i i Canon 77D
 
Canon M6« »-80/1004/54.5/54/5 Feb 2017 779 i i Canon M6
 
Canon M100« »+-4/5-3.5/5 Aug 2017 499 i i Canon M100
 
Canon SL2« »+ +78/1004.5/54.5/54.5/5 Jun 2017 549- i Canon SL2
 
Canon M5« »+82/1004/54.5/54/5 Sep 2016 979 i i Canon M5
 
Canon G5 X« »+ +78/1004.5/54/54.5/5 Oct 2015 799 i i Canon G5 X
 
Canon M10« »---o4/5 Oct 2015 499- i Canon M10
 
Canon T6i« »-75/1004.5/54.5/54.5/5 Feb 2015 749- i Canon T6i
 
Canon T6s« »+77/1004.5/54.5/54.5/5 Feb 2015 649- i Canon T6s
 
Canon G7 X« »+ +77/1004.5/53.5/54.5/5 Sep 2014 699- i Canon G7 X
 
Canon T5i« »-76/1004.5/54.5/54.5/5 Mar 2013 649- i Canon T5i
 
Canon M« »+-4/53.5/54/5 Jul 2012 599- i Canon M
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (-) not available.

Care should be taken when interpreting the review scores above, 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 comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

Canon M3:
Check Ebay offers
Canon T7i:
Check Amazon price

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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Canon M3 vs Canon T7i

    Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.

    Camera Specifications
    Camera Model Canon M3 Canon T7i
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Canon EF-M mount lenses Canon EF mount lenses
    Launch Date February 2015 February 2017
    Launch Price USD 679 USD 749
    Sensor Specs Canon M3 Canon T7i
    Sensor Technology CMOS CMOS
    Sensor Format APS-C Sensor APS-C Sensor
    Sensor Size 22.3 x 14.9 mm 22.3 x 14.9 mm
    Sensor Area 332.27 mm2 332.27 mm2
    Sensor Diagonal 26.8 mm 26.8 mm
    Crop Factor 1.6x 1.6x
    Sensor Resolution 24 Megapixels 24 Megapixels
    Image Resolution 6000 x 4000 pixels 6000 x 4000 pixels
    Pixel Pitch 3.72 μm 3.72 μm
    Pixel Density 7.22 MP/cm2 7.22 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 1080/30p Video 1080/60p Video
    ISO Setting 100-12800 ISO 100-25600 ISO
    ISO Boost 100-25600 ISO 100-51200 ISO
    Image Processor DIGIC 6 DIGIC 7
    DXO Sensor Quality (score) 72 ..
    DXO Color Depth (bits) 22.8 ..
    DXO Dynamic Range (EV) 11.8 ..
    DXO Low Light (ISO) 1169 ..
    Screen Specs Canon M3 Canon T7i
    Viewfinder Type Viewfinder optional Optical viewfinder
    Viewfinder Field of View 95%
    Viewfinder Magnification 0.51x
    LCD Framing Live View Live View
    Rear LCD Size 3.0 inch 3.0 inch
    LCD Resolution 1040k dots 1040k dots
    LCD Attachment Tilting screen Swivel screen
    Touch Input Touchscreen Touchscreen
    Shooting Specs Canon M3 Canon T7i
    Autofocus System On-Sensor Phase-detect Phase-detect AF
    Manual Focusing AidFocus PeakingNo Peaking Feature
    Continuous Shooting 4.2 shutter flaps/s 6 shutter flaps/s
    Shutter Life Expectancy100 000 actuations100 000 actuations
    Fill Flash Build-in Flash Build-in Flash
    Storage Medium SDXC cards SDXC cards
    Second Storage Option Single card slot Single card slot
    UHS card support UHS-I UHS-I
    Connectivity Specs Canon M3 Canon T7i
    External Flash Hotshoe Hotshoe
    USB Connector USB 2.0 USB 2.0
    HDMI Port mini HDMI mini HDMI
    Microphone Port External MIC port External MIC port
    Wifi Support Wifi built-in Wifi built-in
    Near-Field Communication NFC built-in NFC built-in
    Bluetooth Support no Bluetooth Bluetooth built-in
    Body Specs Canon M3 Canon T7i
    Battery Type LP-E17 power pack LP-E17 power pack
    Battery Life (CIPA)250 shots per charge600 shots per charge
    Body Dimensions 111 x 68 x 44 mm
    (4.4 x 2.7 x 1.7 in)
    131 x 100 x 76 mm
    (5.2 x 3.9 x 3.0 in)
    Camera Weight 366 g (12.9 oz) 532 g (18.8 oz)

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