Canon R vs Leica Q3

The Canon EOS R and the Leica Q3 are two digital cameras that were officially introduced, respectively, in September 2018 and May 2023. The Canon R is a mirrorless interchangeable lens camera, while the Q3 is a fixed lens compact. Both cameras are equipped with a full frame sensor. The Canon has a resolution of 30.1 megapixels, whereas the Leica provides 60.3 MP.

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

Headline Specifications

Canon R		Leica Q3
Mirrorless system camera		Fixed lens compact camera
Canon RF mount lenses		28mm f/1.7
30.1 MP – Full Frame sensor		60.3 MP – Full Frame sensor
4K/30p Video		8K/30p Video
ISO 100-40,000 (50 - 102,400)		ISO 50-100,000
Electronic viewfinder (3690k dots)		Electronic viewfinder (5760k dots)
3.2" LCD – 2100k dots		3.0" LCD – 1840k dots
Swivel touchscreen		Tilting touchscreen
8 shutter flaps per second		15 shutter flaps per second
Weathersealed body		Weathersealed body
370 shots per battery charge		350 shots per battery charge
139 x 98 x 84 mm, 660 g		130 x 80 x 93 mm, 743 g

Check Canon R offers at
ebay.com
Check Q3 price at
amazon.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS R and the Leica Q3? 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

The side-by-side display below illustrates the physical size and weight of the Canon R and the Leica Q3. 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.

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Leica Q3 is notably smaller (24 percent) than the Canon R. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the Q3 has a lens built in, whereas the Canon R is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup.

Concerning battery life, the Canon R gets 370 shots out of its Canon LP-E6N battery, while the Q3 can take 350 images on a single charge of its Leica BP-SCL6 power pack. The battery packs of both cameras can be charged via USB, 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 R	139 mm	98 mm	84 mm	660 g	370	Y	Sep 2018	US$ 2 299	ebay.com
2.		Leica Q3	130 mm	80 mm	93 mm	743 g	350	Y	May 2023	US$ 5 999	amazon.com
3.		Canon 6D	145 mm	111 mm	71 mm	770 g	1090	Y	Sep 2012	US$ 2 099	ebay.com
4.		Canon 6D Mark II	144 mm	111 mm	75 mm	765 g	1200	Y	Jun 2017	US$ 1 999	amazon.com
5.		Canon R6	138 mm	98 mm	88 mm	680 g	360	Y	Jul 2020	US$ 2 499	amazon.com
6.		Canon RP	133 mm	85 mm	70 mm	485 g	250	n	Feb 2019	US$ 1 299	amazon.com
7.		Leica M Typ 240	139 mm	80 mm	42 mm	680 g	500	Y	Sep 2012	US$ 6 949	ebay.com
8.		Leica M10	139 mm	80 mm	39 mm	660 g	210	Y	Jan 2017	US$ 6 599	ebay.com
9.		Leica M11	139 mm	80 mm	39 mm	640 g	700	Y	Jan 2022	US$ 8 999	amazon.com
10.		Leica Q2	130 mm	80 mm	92 mm	718 g	370	Y	Mar 2019	US$ 4 999	amazon.com
11.		Leica SL3	141 mm	108 mm	85 mm	769 g	320	Y	Mar 2024	US$ 6 999	amazon.com
12.		Nikon D750	141 mm	113 mm	78 mm	750 g	1230	Y	Sep 2014	US$ 2 299	ebay.com
13.		Nikon Z6	134 mm	101 mm	67 mm	675 g	310	Y	Aug 2018	US$ 1 999	ebay.com
14.		Sony A7 III	127 mm	96 mm	74 mm	650 g	610	Y	Feb 2018	US$ 1 999	amazon.com
15.		Sony A7R	127 mm	94 mm	48 mm	465 g	340	Y	Oct 2013	US$ 2 299	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

Any camera decision will obviously take relative prices into account. 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

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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Both cameras under consideration feature a full frame sensor and have a format factor (sometimes also referred to as "crop factor") of 1.0. Within the spectrum of camera sensors, this places the review cameras among the large-sensor cameras that aim for top notch image quality. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

While the two cameras under review share the same sensor size, the Q3 offers a higher resolution of 60.3 megapixels, compared with 30.1 MP of the Canon R. This megapixels advantage translates into a 42 percent gain in linear resolution. On the other hand, these sensor specs imply that the Q3 has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.79μm versus 5.36μm for the Canon R). However, it should be noted that the Q3 is much more recent (by 4 years and 8 months) than the Canon R, and its sensor will have benefitted from technological advances during this time that compensate for the smaller pixel size. Coming back to sensor resolution, it should be mentioned that the Q3 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Leica Q3 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the Q3 for good quality output (200 dots per inch) amounts to 47.6 x 31.6 inches or 121 x 80.4 cm, for very good quality (250 dpi) 38.1 x 25.3 inches or 96.8 x 64.3 cm, and for excellent quality (300 dpi) 31.8 x 21.1 inches or 80.7 x 53.6 cm. The corresponding values for the Canon R are 33.6 x 22.4 inches or 85.3 x 56.9 cm for good quality, 26.9 x 17.9 inches or 68.3 x 45.5 cm for very good quality, and 22.4 x 14.9 inches or 56.9 x 37.9 cm for excellent quality prints.

The Canon EOS R has a native sensitivity range from ISO 100 to ISO 40000, which can be extended to ISO 50-102400. The corresponding ISO settings for the Leica Q3 are ISO 50 to ISO 100000 (no boost).

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.

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 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
1.		Canon R	Full Frame	30.1	6720	4480	4K/30p	24.5	13.5	2742	89
2.		Leica Q3	Full Frame	60.3	9528	6328	8K/30p	25.4	14.7	3216	96
3.		Canon 6D	Full Frame	20.0	5472	3648	1080/30p	23.8	12.1	2340	82
4.		Canon 6D Mark II	Full Frame	26.0	6240	4160	1080/60p	24.4	11.9	2862	85
5.		Canon R6	Full Frame	20.0	5472	3648	4k/60p	24.2	14.3	3394	90
6.		Canon RP	Full Frame	26.0	6240	4160	4K/30p	24.3	11.9	2977	85
7.		Leica M Typ 240	Full Frame	23.7	5952	3976	1080/25p	24.0	13.3	1860	84
8.		Leica M10	Full Frame	23.8	5952	3992	none	24.4	13.2	2133	86
9.		Leica M11	Full Frame	60.3	9528	6328	none	26.3	14.8	3376	100
10.		Leica Q2	Full Frame	46.7	8368	5584	4K/30p	26.4	13.5	2491	96
11.		Leica SL3	Full Frame	60.3	9520	6336	8K/30p	25.4	14.8	3295	97
12.		Nikon D750	Full Frame	24.2	6016	4016	1080/60p	24.8	14.5	2956	93
13.		Nikon Z6	Full Frame	24.3	6048	4024	4K/30p	25.3	14.3	3299	95
14.		Sony A7 III	Full Frame	24.0	6000	4000	4K/30p	25.0	14.7	3730	96
15.		Sony A7R	Full Frame	36.2	7360	4912	1080/60p	25.6	14.1	2746	95
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the Q3 provides a better video resolution than the Canon R. It can shoot movie footage at 8K/30p, while the Canon is limited to 4K/30p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The two cameras under review are similar with respect to both having an electronic viewfinder. However, the one in the Q3 offers a substantially higher resolution than the one in the Canon R (5760k vs 3690k dots). The following table reports on some other key feature differences and similarities of the Canon R, the Leica Q3, and comparable 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 R	3690	Y	3.2 / 2100	swivel	Y	1/8000s	8.0/s	n	n
2.		Leica Q3	5760	n	3.0 / 1840	tilting	Y	1/2000s	15.0/s	n	Y
3.		Canon 6D	optical	Y	3.0 / 1040	fixed	n	1/4000s	4.5/s	n	n
4.		Canon 6D Mark II	optical	Y	3.0 / 1040	swivel	Y	1/4000s	6.5/s	n	n
5.		Canon R6	3690	n	3.0 / 1620	swivel	Y	1/8000s	12.0/s	n	Y
6.		Canon RP	2360	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	n	n
7.		Leica M Typ 240	optical	n	3.0 / 920	fixed	n	1/4000s	3.0/s	n	n
8.		Leica M10	optical	n	3.0 / 1037	fixed	n	1/4000s	5.0/s	n	n
9.		Leica M11	optical	n	3.0 / 2333	fixed	Y	1/4000s	4.5/s	n	n
10.		Leica Q2	3680	n	3.0 / 1040	fixed	Y	1/2000s	10.0/s	n	Y
11.		Leica SL3	5760	Y	3.2 / 2333	tilting	Y	1/8000s	5.0/s	n	Y
12.		Nikon D750	optical	Y	3.2 / 1229	tilting	n	1/4000s	6.0/s	Y	n
13.		Nikon Z6	3690	Y	3.2 / 2100	tilting	Y	1/8000s	12.0/s	n	Y
14.		Sony A7 III	2359	n	3.0 / 922	tilting	Y	1/8000s	10.0/s	n	Y
15.		Sony A7R	2400	n	3.0 / 1230	tilting	n	1/8000s	4.0/s	n	n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One feature that is present on the Canon R, but is missing on the Q3 is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.

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, both cameras under consideration feature an 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 Leica Q3 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 Canon R and the Q3 write their files to SDXC cards. Both cameras support UHS-II cards, which provide for Ultra High Speed data transfer of up to 312 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 R and Leica Q3 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 R	Y	stereo / mono	Y	Y	mini	3.1	Y	-	Y
2.		Leica Q3	Y	stereo / mono	-	-	micro	3.1	Y	-	Y
3.		Canon 6D	Y	mono / mono	Y	-	mini	2.0	Y	-	-
4.		Canon 6D Mark II	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
5.		Canon R6	Y	mono / mono	Y	Y	micro	3.2	Y	-	Y
6.		Canon RP	Y	stereo / mono	Y	Y	micro	2.0	Y	-	Y
7.		Leica M Typ 240	Y	stereo / mono	-	-	-	2.0	-	-	-
8.		Leica M10	Y	- / -	-	-	-	-	Y	-	-
9.		Leica M11	Y	- / -	-	-	-	3.2	Y	-	Y
10.		Leica Q2	Y	stereo / mono	-	-	-	-	Y	-	Y
11.		Leica SL3	Y	stereo / mono	Y	Y	full	3.1	Y	-	Y
12.		Nikon D750	Y	stereo / mono	Y	Y	mini	2.0	Y	-	-
13.		Nikon Z6	Y	stereo / mono	Y	Y	micro	3.1	Y	-	Y
14.		Sony A7 III	Y	stereo / mono	Y	Y	micro	3.1	Y	Y	Y
15.		Sony A7R	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-

It is notable that the Canon R has a microphone port, which is missing on the Q3. Such an external microphone input can help to substantially improve the quality of audio recordings when a good external microphone is used.

The Q3 is a recent model that features in the current product line-up of Leica. In contrast, the Canon R has been discontinued (but can be found pre-owned on ebay). There has not been a direct replacement model for the Canon R from Canon. Further information on the features and operation of the Canon R and Q3 can be found, respectively, in the Canon R Manual (free pdf) or the online Leica Q3 Manual.

Review summary

So what conclusions can be drawn? Which of the two cameras – the Canon R or the Leica Q3 – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.

Reasons to prefer the Canon EOS R:

• Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
• Better sound: Can connect to an external microphone for higher quality sound recording.
• Better sound control: Has a headphone port that enables audio monitoring while recording.
• Easier setting verification: Features an LCD display on top to control shooting parameters.
• Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
• More detailed LCD: Has a higher resolution rear screen (2100k vs 1840k dots).
• More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
• More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
• Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/2000s) to freeze action.
• More flexible: Accepts interchangeable lenses, so that lens characteristics can be altered.
• More heavily discounted: Has been available for much longer (launched in September 2018).

Arguments in favor of the Leica Q3:

• More detail: Has more megapixels (60.3 vs 30.1MP), which boosts linear resolution by 42%.
• Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
• Better video: Provides higher definition movie capture (8K/30p vs 4K/30p).
• More detailed viewfinder: Has higher resolution electronic viewfinder (5760k vs 3690k dots).
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.79x vs 0.76x).
• Faster burst: Shoots at higher frequency (15 vs 8 flaps/sec) to capture the decisive moment.
• Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
• Ready to shoot: Has an integrated lens, whereas the Canon R necessitates an extra lens.
• More compact: Is smaller (130x80mm vs 139x98mm) and will fit more readily into a bag.
• Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
• More prestigious: Has the Leica luxury appeal, which ensures a high resale value.
• More modern: Reflects 4 years and 8 months of technical progress since the Canon R launch.

If the count of individual advantages (bullet points above) is taken as a guide, the Q3 comes out slightly ahead of the Canon R (12 : 11 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 wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports 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 R and the Leica Q3 place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best Prime Lens Compact Camera listings 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 says little about, for example, the shooting experience and imaging performance of the Canon R and the Q3 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.

Expert reviews

This is where reviews by experts come in. The following table reports the overall ratings of the cameras as published by some of the major 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 R	4/5	o	4/5	79/100	4.5/5	4/5	Sep 2018	US$ 2 299	ebay.com
2.		Leica Q3	5/5	..	4.5/5	..	..	4.5/5	May 2023	US$ 5 999	amazon.com
3.		Canon 6D	5/5	+ +	..	83/100	4.5/5	4.5/5	Sep 2012	US$ 2 099	ebay.com
4.		Canon 6D Mark II	4/5	+	4/5	80/100	4.5/5	4/5	Jun 2017	US$ 1 999	amazon.com
5.		Canon R6	5/5	+ +	4/5	90/100	4.5/5	5/5	Jul 2020	US$ 2 499	amazon.com
6.		Canon RP	4/5	+	4/5	..	4.5/5	4/5	Feb 2019	US$ 1 299	amazon.com
7.		Leica M Typ 240	4/5	..	..	..	4/5	..	Sep 2012	US$ 6 949	ebay.com
8.		Leica M10	4.5/5	..	..	..	4/5	4.5/5	Jan 2017	US$ 6 599	ebay.com
9.		Leica M11	4.5/5	..	4.5/5	..	4.5/5	4.5/5	Jan 2022	US$ 8 999	amazon.com
10.		Leica Q2	..	..	4.5/5	84/100	4.5/5	4/5	Mar 2019	US$ 4 999	amazon.com
11.		Leica SL3	..	..	4.5/5	..	..	4.5/5	Mar 2024	US$ 6 999	amazon.com
12.		Nikon D750	5/5	+ +	4/5	90/100	4.5/5	4.5/5	Sep 2014	US$ 2 299	ebay.com
13.		Nikon Z6	5/5	..	5/5	89/100	4.5/5	5/5	Aug 2018	US$ 1 999	ebay.com
14.		Sony A7 III	..	+ +	4.5/5	89/100	5/5	5/5	Feb 2018	US$ 1 999	amazon.com
15.		Sony A7R	5/5	+ +	..	82/100	4.5/5	5/5	Oct 2013	US$ 2 299	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. 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, please note that some of the review sites have changed their methodology and reporting over time.

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Check Q3 price at
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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. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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