Leica Q3 vs OM System OM-5

The Leica Q3 and the OM System OM-5 are two enthusiast cameras that were announced, respectively, in May 2023 and October 2022. The Q3 is a fixed lens compact, while the OM-5 is a mirrorless interchangeable lens camera. The cameras are based on a full frame (Q3) and a Four Thirds (OM-5) sensor. The Leica has a resolution of 60.3 megapixels, whereas the OM System provides 20.2 MP.

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

Headline Specifications

Leica Q3		OM System OM-5
Fixed lens compact camera		Mirrorless system camera
28mm f/1.7		Micro Four Thirds lenses
60.3 MP – Full Frame sensor		20.2 MP – Four Thirds sensor
8K/30p Video		4K/30p Video
ISO 50-100,000		ISO 200-25,600
Electronic viewfinder (5760k dots)		Electronic viewfinder (2360k dots)
3.0" LCD – 1840k dots		3.0" LCD – 1040k dots
Tilting touchscreen		Swivel touchscreen
15 shutter flaps per second		10 shutter flaps per second
Lens-based stabilization		In-body stabilization
Weathersealed body		Weathersealed body
350 shots per battery charge		310 shots per battery charge
130 x 80 x 93 mm, 743 g		125 x 85 x 50 mm, 414 g

Check Q3 price at
amazon.com
Check OM-5 price at
amazon.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Leica Q3 and the OM System OM-5? 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 physical size and weight of the Leica Q3 and the OM System OM-5 are illustrated in the side-by-side display below. 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 size dimensions are rounded to the nearest millimeter.

The OM-5 can be obtained in two different colors (black, silver), while the Q3 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 OM System OM-5 is somewhat larger (2 percent) than the Leica Q3. 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 OM-5 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can compare the optics available for the OM-5 and their specifications in the Micro Four Thirds Lens Catalog.

Concerning battery life, the Q3 gets 350 shots out of its Leica BP-SCL6 battery, while the OM-5 can take 310 images on a single charge of its OM System BLS-50 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 would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

Body Specifications

		Camera Model	Camera Width	Camera Height	Camera Depth	Camera Weight	Battery Life	Weather Sealing	Camera Launch	Launch Price	Street Price
1.		Leica Q3	130 mm	80 mm	93 mm	743 g	350	Y	May 2023	EUR 5 999	amazon.com
2.		OM System OM-5	125 mm	85 mm	50 mm	414 g	310	Y	Oct 2022	EUR 1 299	amazon.com
3.		Fujifilm GFX 50S	148 mm	94 mm	91 mm	740 g	400	Y	Sep 2016	EUR 6 499	ebay.com
4.		Hasselblad X1D II	148 mm	97 mm	70 mm	766 g	..	Y	Jun 2019	EUR 5 999	ebay.com
5.		Leica M Typ 240	139 mm	80 mm	42 mm	680 g	500	Y	Sep 2012	EUR 6 199	ebay.com
6.		Leica M Typ 262	139 mm	80 mm	42 mm	680 g	400	Y	Nov 2015	EUR 5 499	ebay.com
7.		Leica M10	139 mm	80 mm	39 mm	660 g	210	Y	Jan 2017	EUR 6 499	ebay.com
8.		Leica M11	139 mm	80 mm	39 mm	640 g	700	Y	Jan 2022	EUR 8 349	amazon.com
9.		Leica Q2	130 mm	80 mm	92 mm	718 g	370	Y	Mar 2019	EUR 4 799	amazon.com
10.		Leica SL3	141 mm	108 mm	85 mm	769 g	320	Y	Mar 2024	EUR 6 799	amazon.com
11.		Leica X-U Typ 113	140 mm	79 mm	88 mm	635 g	450	Y	Jan 2016	EUR 3 249	ebay.com
12.		Olympus E-M1	130 mm	94 mm	63 mm	497 g	350	Y	Sep 2013	EUR 1 499	ebay.com
13.		Olympus E-M5 II	124 mm	85 mm	45 mm	469 g	310	Y	Feb 2015	EUR 1 099	ebay.com
14.		Olympus E-M5 III	125 mm	85 mm	50 mm	414 g	310	Y	Oct 2019	EUR 1 199	ebay.com
15.		OM System OM-1	135 mm	92 mm	73 mm	599 g	520	Y	Feb 2022	EUR 2 199	ebay.com
16.		Panasonic GX8	133 mm	78 mm	63 mm	487 g	330	Y	Jul 2015	EUR 1 199	ebay.com
17.		Zeiss ZX1	142 mm	93 mm	46 mm	800 g	250	n	Sep 2018	EUR 5 999	ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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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. 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 sensor inside a digital camera is one of the key determinants 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 Leica Q3 features a full frame sensor and the OM System OM-5 a Four Thirds sensor. The sensor area in the OM-5 is 74 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 2.0. The sensor in the Q3 has a native 3:2 aspect ratio, while the one in the OM-5 offers a 4:3 aspect.

With 60.3MP, the Q3 offers a higher resolution than the OM-5 (20.2MP), but the Q3 nevertheless has larger individual pixels (pixel pitch of 3.79μm versus 3.34μm for the OM-5) due to its larger sensor. Moreover, the Q3 is a somewhat more recent model (by 6 months) than the OM-5, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels. Coming back to sensor resolution, it should be mentioned that neither of the two cameras has an anti-alias filter installed, so they are able to capture all the detail the 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 OM System OM-5 are 25.9 x 19.4 inches or 65.8 x 49.4 cm for good quality, 20.7 x 15.6 inches or 52.7 x 39.5 cm for very good quality, and 17.3 x 13 inches or 43.9 x 32.9 cm for excellent quality prints.

Unlike the Q3, the OM-5 has the capacity to capture high quality composite images (80MP) by combining multiple shots after shifting its sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).

The Leica Q3 has a native sensitivity range from ISO 50 to ISO 100000. The corresponding ISO settings for the OM System OM-5 are ISO 200 to ISO 25600, with the possibility to increase the ISO range to 64-25600.

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.

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 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
1.		Leica Q3	Full Frame	60.3	9528	6328	8K/30p	25.4	14.7	3216	96
2.		OM System OM-5	Four Thirds	20.2	5184	3888	4K/30p	23.4	13.4	1622	78
3.		Fujifilm GFX 50S	Medium Format	51.1	8256	6192	1080/30p	25.4	14.1	2977	96
4.		Hasselblad X1D II	Medium Format	51.3	8272	6200	1080/25p	25.7	14.5	3234	99
5.		Leica M Typ 240	Full Frame	23.7	5952	3976	1080/25p	24.0	13.3	1860	84
6.		Leica M Typ 262	Full Frame	23.7	5952	3976	none	24.8	13.7	2478	90
7.		Leica M10	Full Frame	23.8	5952	3992	none	24.4	13.2	2133	86
8.		Leica M11	Full Frame	60.3	9528	6328	none	26.3	14.8	3376	100
9.		Leica Q2	Full Frame	46.7	8368	5584	4K/30p	26.4	13.5	2491	96
10.		Leica SL3	Full Frame	60.3	9520	6336	8K/30p	25.4	14.8	3295	97
11.		Leica X-U Typ 113	APS-C	16.1	4928	3264	1080/30p	23.8	13.0	1614	80
12.		Olympus E-M1	Four Thirds	15.9	4608	3456	1080/30p	23.0	12.7	757	73
13.		Olympus E-M5 II	Four Thirds	15.9	4608	3456	1080/60p	23.0	12.5	842	73
14.		Olympus E-M5 III	Four Thirds	20.2	5184	3888	4K/30p	23.3	13.1	1324	76
15.		OM System OM-1	Four Thirds	20.2	5184	3888	4K/60p	23.4	13.4	1553	77
16.		Panasonic GX8	Four Thirds	20.2	5184	3888	4K/30p	23.5	12.6	806	75
17.		Zeiss ZX1	Full Frame	37.4	7488	4992	4K/30p	25.2	14.1	2759	94
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 are equipped with sensors that have a sufficiently high read-out speed for moving images, but the Q3 provides a higher video resolution than the OM-5. It can shoot video footage at 8K/30p, while the OM System is limited to 4K/30p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. The two cameras under consideration 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 OM-5 (5760k vs 2360k dots). The adjacent table lists some of the other core features of the Leica Q3 and OM System OM-5 along with similar information for a selection of comparators.

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.		Leica Q3	5760	n	3.0 / 1840	tilting	Y	1/2000s	15.0/s	n	Y
2.		OM System OM-5	2360	n	3.0 / 1040	swivel	Y	1/8000s	10.0/s	n	Y
3.		Fujifilm GFX 50S	optional	Y	3.2 / 2360	full-flex	Y	1/4000s	3.0/s	n	n
4.		Hasselblad X1D II	3690	n	3.6 / 2360	fixed	Y	1/2000s	2.7/s	n	n
5.		Leica M Typ 240	optical	n	3.0 / 920	fixed	n	1/4000s	3.0/s	n	n
6.		Leica M Typ 262	optical	n	3.0 / 921	fixed	n	1/4000s	3.0/s	n	n
7.		Leica M10	optical	n	3.0 / 1037	fixed	n	1/4000s	5.0/s	n	n
8.		Leica M11	optical	n	3.0 / 2333	fixed	Y	1/4000s	4.5/s	n	n
9.		Leica Q2	3680	n	3.0 / 1040	fixed	Y	1/2000s	10.0/s	n	Y
10.		Leica SL3	5760	Y	3.2 / 2333	tilting	Y	1/8000s	5.0/s	n	Y
11.		Leica X-U Typ 113	optional	n	3.0 / 920	fixed	n	1/2000s	5.0/s	Y	n
12.		Olympus E-M1	2360	n	3.0 / 1037	tilting	Y	1/8000s	10.0/s	n	Y
13.		Olympus E-M5 II	2360	n	3.0 / 1037	swivel	Y	1/8000s	10.0/s	n	Y
14.		Olympus E-M5 III	2360	n	3.0 / 1040	swivel	Y	1/8000s	10.0/s	n	Y
15.		OM System OM-1	5760	n	3.0 / 1640	swivel	Y	1/8000s	10.0/s	n	Y
16.		Panasonic GX8	2360	n	3.0 / 1040	swivel	Y	1/8000s	10.0/s	n	Y
17.		Zeiss ZX1	6221	n	4.3 / 2765	fixed	Y	1/1000s	3.0/s	n	n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

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 and the OM System OM-5 both have 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 Q3 and the OM-5 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 Leica Q3 and OM System OM-5 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.		Leica Q3	Y	stereo / mono	-	-	micro	3.1	Y	-	Y
2.		OM System OM-5	Y	stereo / mono	Y	-	micro	2.0	Y	-	Y
3.		Fujifilm GFX 50S	Y	stereo / mono	Y	Y	micro	3.0	Y	-	-
4.		Hasselblad X1D II	Y	stereo / mono	Y	Y	-	3.0	Y	-	-
5.		Leica M Typ 240	Y	stereo / mono	-	-	-	2.0	-	-	-
6.		Leica M Typ 262	Y	- / -	-	-	-	2.0	-	-	-
7.		Leica M10	Y	- / -	-	-	-	-	Y	-	-
8.		Leica M11	Y	- / -	-	-	-	3.2	Y	-	Y
9.		Leica Q2	Y	stereo / mono	-	-	-	-	Y	-	Y
10.		Leica SL3	Y	stereo / mono	Y	Y	full	3.1	Y	-	Y
11.		Leica X-U Typ 113	Y	stereo / mono	-	-	-	2.0	-	-	-
12.		Olympus E-M1	Y	stereo / mono	Y	-	micro	2.0	Y	-	-
13.		Olympus E-M5 II	Y	stereo / mono	Y	-	micro	2.0	Y	-	-
14.		Olympus E-M5 III	Y	stereo / mono	Y	-	micro	2.0	Y	-	Y
15.		OM System OM-1	Y	stereo / mono	Y	Y	micro	3.0	Y	-	Y
16.		Panasonic GX8	Y	stereo / mono	Y	-	micro	2.0	Y	Y	-
17.		Zeiss ZX1	Y	stereo / mono	-	-	-	3.1	Y	Y	Y

It is notable that the OM-5 has a microphone port, which can help to improve the quality of audio recordings by attaching an external microphone. The Q3 does not feature such a mic input.

Both the Q3 and the OM-5 are recent models that are part of the current product line-up. The OM-5 replaced the earlier Olympus E-M5 III, while the Q3 followed on from the Leica Q2. Further information on the features and operation of the Q3 and OM-5 can be found, respectively, in the Leica Q3 Manual (free pdf) or the online OM System OM-5 Manual.

Review summary

So what is the bottom line? Is the Leica Q3 better than the OM System OM-5 or vice versa? A synthesis of the relative strong points of each of the models is listed below.

Advantages of the Leica Q3:

• More detail: Offers more megapixels (60.3 vs 20.2MP) with a 77% higher linear resolution.
• Better image quality: Features a larger and more technologically advanced imaging 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 video: Provides higher definition movie capture (8K/30p vs 4K/30p).
• More detailed viewfinder: Has higher resolution electronic viewfinder (5760k vs 2360k dots).
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.79x vs 0.68x).
• More detailed LCD: Has a higher resolution rear screen (1840k vs 1040k dots).
• Faster burst: Shoots at higher frequency (15 vs 10 flaps/sec) to capture the decisive moment.
• Ready to shoot: Has a lens built-in, whereas the OM-5 requires a separate lens.
• Longer lasting: Can take more shots (350 versus 310) on a single battery charge.
• Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
• More prestigious: Has the Leica luxury appeal, which ensures a high resale price.
• More modern: Is somewhat more recent (announced 6 months after the OM-5).

Arguments in favor of the OM System OM-5:

• High quality composites: Can combine several shots after pixel-shifting its sensor.
• Better sound: Can connect to an external microphone for higher quality sound recording.
• 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: Takes interchangeable lenses and can thus be used with specialty optics.
• More heavily discounted: Has been on the market for longer (launched in October 2022).

If the count of individual advantages (bullet points above) is taken as a guide, the Q3 is the clear winner of the match-up (15 : 7 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 Leica Q3 and the OM System OM-5 place the cameras among the top in their class? Find out in the latest Best Prime Lens Compact Camera and Best Mirrorless Interchangeable Lens 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 Q3 and the OM-5 in practical situations. 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.		Leica Q3	5/5	..	4.5/5	..	..	4.5/5	May 2023	EUR 5 999	amazon.com
2.		OM System OM-5	5/5	..	4.5/5	83/100	5/5	4.5/5	Oct 2022	EUR 1 299	amazon.com
3.		Fujifilm GFX 50S	..	..	4.5/5	85/100	5/5	4.5/5	Sep 2016	EUR 6 499	ebay.com
4.		Hasselblad X1D II	..	..	4/5	..	4/5	4/5	Jun 2019	EUR 5 999	ebay.com
5.		Leica M Typ 240	4/5	..	..	..	4/5	..	Sep 2012	EUR 6 199	ebay.com
6.		Leica M Typ 262	..	..	..	..	..	..	Nov 2015	EUR 5 499	ebay.com
7.		Leica M10	4.5/5	..	..	..	4/5	4.5/5	Jan 2017	EUR 6 499	ebay.com
8.		Leica M11	4.5/5	..	4.5/5	..	4.5/5	4.5/5	Jan 2022	EUR 8 349	amazon.com
9.		Leica Q2	..	..	4.5/5	84/100	4.5/5	4/5	Mar 2019	EUR 4 799	amazon.com
10.		Leica SL3	..	..	4.5/5	..	..	4.5/5	Mar 2024	EUR 6 799	amazon.com
11.		Leica X-U Typ 113	3.5/5	..	..	..	..	3.5/5	Jan 2016	EUR 3 249	ebay.com
12.		Olympus E-M1	5/5	+ +	..	84/100	4.5/5	4.5/5	Sep 2013	EUR 1 499	ebay.com
13.		Olympus E-M5 II	5/5	+ +	4.5/5	81/100	5/5	5/5	Feb 2015	EUR 1 099	ebay.com
14.		Olympus E-M5 III	5/5	+	5/5	82/100	4.5/5	4.5/5	Oct 2019	EUR 1 199	ebay.com
15.		OM System OM-1	5/5	..	..	87/100	5/5	4.5/5	Feb 2022	EUR 2 199	ebay.com
16.		Panasonic GX8	5/5	+	..	82/100	4.5/5	4.5/5	Jul 2015	EUR 1 199	ebay.com
17.		Zeiss ZX1	3/5	..	..	83/100	4/5	4/5	Sep 2018	EUR 5 999	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, though. The assessments were made in relation to similar cameras of the same technological generation. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, 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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