Canon M3 vs R6 Mark II

The Canon EOS M3 and the Canon EOS R6 Mark II are two digital cameras that were revealed to the public, respectively, in February 2015 and November 2022. Both the M3 and the R6 Mark II are mirrorless interchangeable lens cameras that are based on an APS-C (M3) and a full frame (R6 Mark II) 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 R6 Mark II
Mirrorless system camera		Mirrorless system camera
Canon EF-M mount lenses		Canon RF mount lenses
24 MP – APS-C sensor		24 MP – Full Frame sensor
1080/30p Video		4k/60p Video
ISO 100-12,800 (100 - 25,600)		ISO 100-102,400 (100 - 204,800)
Viewfinder optional		Electronic viewfinder (3690k dots)
3.0" LCD – 1040k dots		3.0" LCD – 1620k dots
Tilting touchscreen		Swivel touchscreen
4.2 shutter flaps per second		12 shutter flaps per second
Lens stabilization only		In-body stabilization
not weather sealed		Weathersealed body
250 shots per battery charge		450 shots per battery charge
111 x 68 x 44 mm, 366 g		138 x 98 x 88 mm, 670 g

Check M3 offers at
ebay.com
Check R6 Mark II price at
amazon.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS M3 and the Canon EOS R6 Mark II? 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

An illustration of the physical size and weight of the Canon M3 and the Canon R6 Mark II is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth measures are rounded to the nearest millimeter.

The M3 can be obtained in two different colors (black, white), while the R6 Mark II is only available in black.

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon R6 Mark II is considerably larger (79 percent) than the Canon M3. Moreover, the R6 Mark II is substantially heavier (83 percent) than the M3. It is noteworthy in this context that the R6 Mark II is splash and dust-proof, while the M3 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. 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.

Concerning battery life, the M3 gets 250 shots out of its Canon LP-E17 battery, while the R6 Mark II can take 450 images on a single charge of its Canon LP-E6NH power pack. The power pack in the R6 Mark II can be charged via the USB port, which can be very convenient when travelling.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

Body Specifications

		Camera Model	Camera Width	Camera Height	Camera Depth	Camera Weight	Battery Life	Weather Sealing	Camera Launch	Launch Price	Street Price
1.		Canon M3	111 mm	68 mm	44 mm	366 g	250	n	Feb 2015	US$ 679	ebay.com
2.		Canon R6 Mark II	138 mm	98 mm	88 mm	670 g	450	Y	Nov 2022	US$ 2 499	amazon.com
3.		Canon 750D	132 mm	101 mm	78 mm	555 g	440	n	Feb 2015	US$ 749	ebay.com
4.		Canon G5 X	112 mm	76 mm	44 mm	353 g	210	n	Oct 2015	US$ 799	ebay.com
5.		Canon G7 X	103 mm	60 mm	40 mm	304 g	210	n	Sep 2014	US$ 699	ebay.com
6.		Canon G7 X Mark II	106 mm	61 mm	42 mm	319 g	265	n	Feb 2016	US$ 699	ebay.com
7.		Canon M	109 mm	66 mm	32 mm	298 g	230	n	Jul 2012	US$ 599	ebay.com
8.		Canon M5	116 mm	89 mm	61 mm	427 g	295	n	Sep 2016	US$ 979	ebay.com
9.		Canon M6	112 mm	68 mm	45 mm	390 g	295	n	Feb 2017	US$ 779	ebay.com
10.		Canon M10	108 mm	67 mm	35 mm	301 g	255	n	Oct 2015	US$ 499	ebay.com
11.		Canon M100	108 mm	67 mm	35 mm	302 g	295	n	Aug 2017	US$ 499	ebay.com
12.		Canon R3	150 mm	143 mm	87 mm	1015 g	760	Y	Sep 2021	US$ 5 999	amazon.com
13.		Canon R5	138 mm	98 mm	88 mm	738 g	320	Y	Jul 2020	US$ 3 899	amazon.com
14.		Canon R6	138 mm	98 mm	88 mm	680 g	360	Y	Jul 2020	US$ 2 499	amazon.com
15.		Fujifilm X-H2S	136 mm	93 mm	85 mm	660 g	580	Y	May 2022	US$ 2 499	amazon.com
16.		OM System OM-1	135 mm	92 mm	73 mm	599 g	520	Y	Feb 2022	US$ 2 199	ebay.com
17.		Sony A6000	120 mm	67 mm	45 mm	344 g	360	n	Feb 2014	US$ 599	ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
Convert to Imperial

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. The M3 was launched at a markedly lower price (by 73 percent) than the R6 Mark II, 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

The size of the imaging sensor is a crucial determinant of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and 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.

Of the two cameras under consideration, the Canon M3 features an APS-C sensor and the Canon R6 Mark II a full frame sensor. The sensor area in the R6 Mark II is 158 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.

Technology-wise, the R6 Mark II uses a more advanced image processing engine (DIGIC X) than the M3 (DIGIC 6), with benefits for noise reduction, color accuracy, and processing speed.

Even though the R6 Mark II has a larger sensor, both cameras offer the same resolution of 24 megapixels. This implies that the R6 Mark II has a lower pixel density and larger individual pixels (with a pixel pitch of 5.98μm versus 3.72μm for the M3), which gives it a potential advantage in terms of light gathering capacity. In addition, the R6 Mark II is much more recent (by 7 years and 8 months) 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 R6 Mark II are ISO 100 to ISO 102400, with the possibility to increase the ISO range to 100-204800.

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

For many cameras, data on sensor performance has been reported by DXO Mark. 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"). 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
1.		Canon M3	APS-C	24.0	6000	4000	1080/30p	22.8	11.8	1169	72
2.		Canon R6 Mark II	Full Frame	24.0	6000	4000	4k/60p	25.4	14.6	3154	96
3.		Canon 750D	APS-C	24.0	6000	4000	1080/30p	22.7	12.0	919	71
4.		Canon G5 X	1-inch	20.0	5472	3648	1080/60p	21.4	12.3	471	62
5.		Canon G7 X	1-inch	20.0	5472	3648	1080/60p	23.0	12.7	556	71
6.		Canon G7 X Mark II	1-inch	20.0	5472	3648	1080/60p	21.8	11.9	260	62
7.		Canon M	APS-C	17.9	5184	3456	1080/30p	22.1	11.2	827	65
8.		Canon M5	APS-C	24.0	6000	4000	1080/60p	23.4	12.4	1262	77
9.		Canon M6	APS-C	24.0	6000	4000	1080/60p	23.4	12.6	1317	78
10.		Canon M10	APS-C	17.9	5184	3456	1080/30p	22.2	11.4	753	65
11.		Canon M100	APS-C	24.0	6000	4000	1080/60p	23.5	12.9	1272	78
12.		Canon R3	Full Frame	24.0	6000	4000	6K/60p	25.0	14.7	4086	96
13.		Canon R5	Full Frame	44.8	8192	5464	8K/30p	25.3	14.6	3042	95
14.		Canon R6	Full Frame	20.0	5472	3648	4k/60p	24.2	14.3	3394	90
15.		Fujifilm X-H2S	APS-C	26.0	6240	4160	6.2k/30p	24.3	13.9	2224	86
16.		OM System OM-1	Four Thirds	20.2	5184	3888	4K/60p	23.4	13.4	1553	77
17.		Sony A6000	APS-C	24.0	6000	4000	1080/60p	24.1	13.1	1347	82
Note: DXO values in italics represent estimates based on sensor size and age.

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 R6 Mark II provides a better video resolution than the M3. It can shoot movie footage at 4k/60p, while the M3 is limited to 1080/30p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the R6 Mark II has an electronic viewfinder (3690k dots), which can be very helpful 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 table below summarizes some of the other core capabilities of the Canon M3 and Canon R6 Mark II in connection with corresponding information for a sample of similar cameras.

Core Features

		Camera Model	Viewfinder (Type or 000 dots)	Control Panel (yes/no)	LCD Specifications (inch/000 dots)	LCD Attach- ment	Touch Screen (yes/no)	Max Shutter Speed *	Max Shutter Flaps *	Built-in Flash (yes/no)	Built-in Image Stab
1.		Canon M3	optional	n	3.0 / 1040	tilting	Y	1/4000s	4.2/s	Y	n
2.		Canon R6 Mark II	3690	n	3.0 / 1620	swivel	Y	1/8000s	12.0/s	n	Y
3.		Canon 750D	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
4.		Canon G5 X	2360	n	3.0 / 1040	swivel	Y	1/2000s	5.9/s	Y	Y
5.		Canon G7 X	none	n	3.0 / 1040	tilting	Y	1/2000s	6.5/s	Y	Y
6.		Canon G7 X Mark II	none	n	3.0 / 1040	tilting	Y	1/2000s	8.0/s	Y	Y
7.		Canon M	none	n	3.0 / 1040	fixed	Y	1/4000s	4.3/s	n	n
8.		Canon M5	2360	n	3.2 / 1620	tilting	Y	1/4000s	9.0/s	Y	n
9.		Canon M6	optional	n	3.0 / 1040	tilting	Y	1/4000s	9.0/s	Y	n
10.		Canon M10	none	n	3.0 / 1040	tilting	Y	1/4000s	4.6/s	Y	n
11.		Canon M100	none	n	3.0 / 1040	tilting	Y	1/4000s	6.1/s	Y	n
12.		Canon R3	5760	Y	3.2 / 4150	swivel	Y	1/8000s	12.0/s	n	Y
13.		Canon R5	5760	Y	3.2 / 2100	swivel	Y	1/8000s	12.0/s	n	Y
14.		Canon R6	3690	n	3.0 / 1620	swivel	Y	1/8000s	12.0/s	n	Y
15.		Fujifilm X-H2S	5760	Y	3.0 / 1620	swivel	Y	1/8000s	15.0/s	n	Y
16.		OM System OM-1	5760	n	3.0 / 1640	swivel	Y	1/8000s	10.0/s	n	Y
17.		Sony A6000	1440	n	3.0 / 922	tilting	n	1/4000s	11.0/s	Y	n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One difference between the cameras concerns the presence of an on-board flash. The M3 has one, while the R6 Mark II does not. While the built-in flash of the M3 is not very powerful, it can at times be useful as a fill-in light.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the R6 Mark II is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The Canon R6 Mark II has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

Concerning the storage of imaging data, both the M3 and the R6 Mark II write their files to SDXC cards. The R6 Mark II features dual card slots, which can be very useful in case a memory card fails. In contrast, the M3 only has one slot. The R6 Mark II supports UHS-II cards (Ultra High Speed data transfer of up to 312 MB/s), while the M3 can use UHS-I cards (up to 104 MB/s).

Connectivity comparison

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 R6 Mark II 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 Mic / Speaker	Microphone Port	Headphone Port	HDMI Port	USB Port	WiFi Support	NFC Support	Bluetooth Support
1.		Canon M3	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
2.		Canon R6 Mark II	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
3.		Canon 750D	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
4.		Canon G5 X	Y	stereo / mono	-	-	mini	2.0	Y	Y	-
5.		Canon G7 X	-	stereo / mono	-	-	micro	2.0	Y	Y	-
6.		Canon G7 X Mark II	-	stereo / mono	-	-	micro	2.0	Y	Y	-
7.		Canon M	Y	stereo / mono	Y	-	mini	2.0	-	-	-
8.		Canon M5	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
9.		Canon M6	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
10.		Canon M10	-	stereo / mono	-	-	mini	2.0	Y	Y	-
11.		Canon M100	-	stereo / mono	-	-	micro	2.0	Y	Y	Y
12.		Canon R3	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
13.		Canon R5	Y	mono / mono	Y	Y	micro	3.2	Y	-	Y
14.		Canon R6	Y	mono / mono	Y	Y	micro	3.2	Y	-	Y
15.		Fujifilm X-H2S	Y	stereo / mono	Y	Y	full	3.0	Y	-	Y
16.		OM System OM-1	Y	stereo / mono	Y	Y	micro	3.0	Y	-	Y
17.		Sony A6000	Y	stereo / mono	-	-	micro	2.0	Y	Y	-

It is notable that the R6 Mark II has a headphone jack, which makes it possible to attach external headphones and monitor the quality of sound during the recording process. The M3 lacks such a headphone port.

The R6 Mark II is a recent model that features in the current product line-up of Canon. In contrast, the M3 has been discontinued (but 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 features and operation of the M3 and R6 Mark II can be found, respectively, in the Canon M3 Manual (free pdf) or the online Canon R6 Mark II Manual.

Review summary

So how do things add up? Is there a clear favorite between the Canon M3 and the Canon R6 Mark II? Which camera is better? The listing below highlights the relative strengths of the two models.

Reasons to prefer the Canon EOS M3:

• More compact: Is smaller (111x68mm vs 138x98mm) and thus needs less room in the bag.
• Less heavy: Is lighter (by 304g or 45 percent) and hence easier to carry around.
• Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
• Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
• More affordable: Was introduced into a lower priced category (73 percent cheaper at launch).
• More heavily discounted: Has been available for much longer (launched in February 2015).

Advantages of the Canon EOS R6 Mark II:

• Better image quality: Is equipped with a larger and more technologically advanced sensor.
• Richer colors: The sensor size advantage translates into images with better, more accurate colors.
• More dynamic range: Larger sensor captures a wider spectrum of light and dark details.
• Better low-light sensitivity: Larger sensor produces good images even in poorly lit environments.
• Better jpgs: Has a more modern image processing engine (DIGIC X vs DIGIC 6).
• Better video: Provides higher definition movie capture (4k/60p vs 1080/30p).
• Better sound control: Has a headphone port that enables audio monitoring while recording.
• Easier framing: Has an electronic viewfinder for image composition and settings control.
• More detailed LCD: Has a higher resolution rear screen (1620k vs 1040k dots).
• More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
• Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
• Faster burst: Shoots at higher frequency (12 vs 4.2 flaps/sec) to capture the decisive moment.
• Less disturbing: Has an electronic shutter option for completely silent shooting.
• Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
• Longer lasting: Gets more shots (450 versus 250) out of a single battery charge.
• Easier travel charging: Can be conveniently charged via its USB port.
• Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
• Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
• Faster data transfer: Supports a more advanced USB protocol (3.2 vs 2.0).
• Easier wireless transfer: Supports Bluetooth for image sharing without cables.
• Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
• Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
• More modern: Reflects 7 years and 8 months of technical progress since the M3 launch.

If the number of relative strengths (bullet points above) is taken as a guide, the R6 Mark II is the clear winner of the contest (23 : 6 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision on a new camera. A professional wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

How about other alternatives? Do the specifications of the Canon M3 and the Canon R6 Mark II place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera listing whether the two cameras rank among the cream of the crop.

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the M3 or the R6 Mark II. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.

Expert reviews

This is why hands-on reviews by experts are important. The adjacent summary-table relays the overall verdicts of several of the most popular camera review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). 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.

Expert Camera Reviews

		Camera   Model	AP   score	CL   score	DCW   score	DPR   score	EPZ   score	PB   score	Camera Launch	Launch Price	Street Price
1.		Canon M3	4/5	o	..	75/100	4.5/5	4/5	Feb 2015	US$ 679	ebay.com
2.		Canon R6 Mark II	5/5	+ +	4.5/5	91/100	4.5/5	5/5	Nov 2022	US$ 2 499	amazon.com
3.		Canon 750D	5/5	..	..	75/100	4.5/5	4.5/5	Feb 2015	US$ 749	ebay.com
4.		Canon G5 X	5/5	+ +	..	78/100	4.5/5	4.5/5	Oct 2015	US$ 799	ebay.com
5.		Canon G7 X	4/5	+ +	..	77/100	4.5/5	4.5/5	Sep 2014	US$ 699	ebay.com
6.		Canon G7 X Mark II	4.5/5	+ +	..	81/100	4.5/5	4.5/5	Feb 2016	US$ 699	ebay.com
7.		Canon M	3/5	+	..	..	4/5	4/5	Jul 2012	US$ 599	ebay.com
8.		Canon M5	4/5	+	4/5	82/100	4/5	4/5	Sep 2016	US$ 979	ebay.com
9.		Canon M6	..	..	..	80/100	4/5	4/5	Feb 2017	US$ 779	ebay.com
10.		Canon M10	..	..	..	..	..	4/5	Oct 2015	US$ 499	ebay.com
11.		Canon M100	3/5	+	..	..	4/5	3.5/5	Aug 2017	US$ 499	ebay.com
12.		Canon R3	5/5	o	4.5/5	..	5/5	4.5/5	Sep 2021	US$ 5 999	amazon.com
13.		Canon R5	4.5/5	+	4/5	91/100	4.5/5	4.5/5	Jul 2020	US$ 3 899	amazon.com
14.		Canon R6	5/5	+ +	4/5	90/100	4.5/5	5/5	Jul 2020	US$ 2 499	amazon.com
15.		Fujifilm X-H2S	5/5	+	5/5	90/100	5/5	5/5	May 2022	US$ 2 499	amazon.com
16.		OM System OM-1	5/5	..	..	87/100	5/5	4.5/5	Feb 2022	US$ 2 199	ebay.com
17.		Sony A6000	5/5	+	4.5/5	80/100	4.5/5	5/5	Feb 2014	US$ 599	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

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. 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, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

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Other camera comparisons

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