Leica SL3 vs Panasonic G9 II

The Leica SL3 and the Panasonic Lumix DC-G9 II are two enthusiast cameras that were announced, respectively, in March 2024 and September 2023. Both the Leica SL3 and the G9 II are mirrorless interchangeable lens cameras that are based on a full frame (Leica SL3) and a Four Thirds (G9 II) sensor. The Leica has a resolution of 60.3 megapixels, whereas the Panasonic provides 25 MP.

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

Headline Specifications

Leica SL3		Panasonic G9 II
Mirrorless system camera		Mirrorless system camera
Leica L mount lenses		Micro Four Thirds lenses
60.3 MP – Full Frame sensor		25 MP – Four Thirds sensor
8K/30p Video		5.7K/60p Video
ISO 100-100,000		ISO 100-25,600
Electronic viewfinder (5760k dots)		Electronic viewfinder (3680k dots)
3.2" LCD – 2333k dots		3.0" LCD – 1840k dots
Tilting touchscreen		Swivel touchscreen
5 shutter flaps per second		10 shutter flaps per second
In-body stabilization		In-body stabilization
Weathersealed body		Weathersealed body
320 shots per battery charge		390 shots per battery charge
141 x 108 x 85 mm, 769 g		134 x 102 x 90 mm, 658 g

Check Leica SL3 price at
amazon.com
Check G9 II price at
amazon.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Leica SL3 and the Panasonic Lumix DC-G9 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

The side-by-side display below illustrates the physical size and weight of the Leica SL3 and the Panasonic G9 II. 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 Panasonic G9 II is notably smaller (10 percent) than the Leica SL3. Moreover, the G9 II is markedly lighter (14 percent) than the Leica SL3. 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 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 Leica SL3 gets 320 shots out of its Leica BP-SCL6 battery, while the G9 II can take 390 images on a single charge of its Panasonic DMW-BLK22 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.		Leica SL3	141 mm	108 mm	85 mm	769 g	320	Y	Mar 2024	EUR 6 799	amazon.com
2.		Panasonic G9 II	134 mm	102 mm	90 mm	658 g	390	Y	Sep 2023	EUR 1 899	amazon.com
3.		Hasselblad X2D 100C	149 mm	106 mm	75 mm	895 g	420	Y	Sep 2022	EUR 8 699	amazon.com
4.		Leica Q3	130 mm	80 mm	93 mm	743 g	350	Y	May 2023	EUR 5 999	amazon.com
5.		Leica SL	147 mm	104 mm	39 mm	847 g	400	Y	Oct 2015	EUR 6 899	ebay.com
6.		Leica SL2	146 mm	107 mm	42 mm	953 g	370	Y	Nov 2019	EUR 5 999	amazon.com
7.		Leica SL2-S	146 mm	107 mm	83 mm	931 g	510	Y	Dec 2020	EUR 4 499	amazon.com
8.		Nikon Z8	144 mm	119 mm	83 mm	910 g	340	Y	May 2023	EUR 4 599	amazon.com
9.		Panasonic G9	137 mm	97 mm	92 mm	658 g	400	Y	Nov 2017	EUR 1 699	ebay.com
10.		Panasonic GH5	139 mm	98 mm	87 mm	725 g	410	Y	Jan 2017	EUR 1 999	ebay.com
11.		Panasonic GH6	138 mm	100 mm	100 mm	823 g	360	Y	Feb 2022	EUR 2 799	amazon.com
12.		Panasonic S5	133 mm	98 mm	82 mm	714 g	440	Y	Sep 2020	EUR 1 999	amazon.com
13.		Panasonic S5 II	134 mm	102 mm	90 mm	740 g	370	Y	Jan 2023	EUR 2 199	amazon.com
14.		Sony A1	129 mm	97 mm	81 mm	737 g	530	Y	Jan 2021	EUR 7 299	amazon.com
15.		Sony A7R V	131 mm	97 mm	82 mm	723 g	530	Y	Oct 2022	EUR 4 499	amazon.com
16.		Sony A9 III	136 mm	97 mm	83 mm	702 g	530	Y	Nov 2023	EUR 6 999	amazon.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 naturally be influenced heavily by the price. 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 G9 II was launched at a markedly lower price (by 73 percent) than the Leica SL3, which puts it into a different market segment. 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

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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.

Of the two cameras under consideration, the Leica SL3 features a full frame sensor and the Panasonic G9 II a Four Thirds sensor. The sensor area in the G9 II 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 Leica SL3 has a native 3:2 aspect ratio, while the one in the G9 II offers a 4:3 aspect.

With 60.3MP, the Leica SL3 offers a higher resolution than the G9 II (25MP), but the Leica SL3 nevertheless has larger individual pixels (pixel pitch of 3.79μm versus 3.00μm for the G9 II) due to its larger sensor. Moreover, the Leica SL3 is a somewhat more recent model (by 5 months) than the G9 II, 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 SL3 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the Leica SL3 for good quality output (200 dots per inch) amounts to 47.6 x 31.7 inches or 120.9 x 80.5 cm, for very good quality (250 dpi) 38.1 x 25.3 inches or 96.7 x 64.4 cm, and for excellent quality (300 dpi) 31.7 x 21.1 inches or 80.6 x 53.6 cm. The corresponding values for the Panasonic G9 II are 28.9 x 21.7 inches or 73.4 x 55.1 cm for good quality, 23.1 x 17.3 inches or 58.7 x 44.1 cm for very good quality, and 19.3 x 14.5 inches or 48.9 x 36.7 cm for excellent quality prints.

Unlike the Leica SL3, the G9 II has the capacity to capture high quality composite images (100MP) 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 SL3 has a native sensitivity range from ISO 100 to ISO 100000, which can be extended to ISO 50-100000. The corresponding ISO settings for the Panasonic Lumix DC-G9 II are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-25600.

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.

For many cameras, data on sensor performance has been reported by DXO Mark. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). 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.		Leica SL3	Full Frame	60.3	9520	6336	8K/30p	25.4	14.8	3295	97
2.		Panasonic G9 II	Four Thirds	25.0	5776	4336	5.7K/60p	23.4	13.5	1710	78
3.		Hasselblad X2D 100C	Medium Format	102.1	11656	8762	none	25.9	14.9	3550	101
4.		Leica Q3	Full Frame	60.3	9528	6328	8K/30p	25.4	14.7	3216	96
5.		Leica SL	Full Frame	24.0	6000	4000	4K/30p	25.0	13.4	1821	88
6.		Leica SL2	Full Frame	46.7	8368	5584	4K/60p	25.3	14.3	2866	95
7.		Leica SL2-S	Full Frame	24.0	6000	4000	4K/60p	25.2	14.1	3504	95
8.		Nikon Z8	Full Frame	45.4	8256	5504	8K/30p	26.3	14.2	2548	98
9.		Panasonic G9	Four Thirds	20.2	5184	3888	4K/60p	23.1	12.8	1138	74
10.		Panasonic GH5	Four Thirds	20.2	5184	3888	4K/60p	23.9	13.0	807	77
11.		Panasonic GH6	Four Thirds	25.0	5776	4336	5.7K/60p	23.4	13.4	1555	77
12.		Panasonic S5	Full Frame	24.0	6000	4000	4K/60p	25.1	14.5	2697	94
13.		Panasonic S5 II	Full Frame	24.0	6000	4000	6K/30p	25.4	14.6	3158	96
14.		Sony A1	Full Frame	49.8	8640	5760	8k/30p	25.9	14.5	3163	98
15.		Sony A7R V	Full Frame	60.2	9504	6336	8k/24p	26.5	14.8	3187	100
16.		Sony A9 III	Full Frame	24.0	6000	4000	4K/120p	25.4	14.7	3243	96
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 also of capturing video footage. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the Leica SL3 provides a higher video resolution than the G9 II. It can shoot video footage at 8K/30p, while the Panasonic is limited to 5.7K/60p.

Feature comparison

Apart from 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 Leica SL3 offers a substantially higher resolution than the one in the G9 II (5760k vs 3680k dots). The adjacent table lists some of the other core features of the Leica SL3 and Panasonic G9 II 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 SL3	5760	Y	3.2 / 2333	tilting	Y	1/8000s	5.0/s	n	Y
2.		Panasonic G9 II	3680	n	3.0 / 1840	swivel	Y	1/8000s	10.0/s	n	Y
3.		Hasselblad X2D 100C	5760	Y	3.6 / 2360	tilting	Y	1/4000s	3.3/s	n	Y
4.		Leica Q3	5760	n	3.0 / 1840	tilting	Y	1/2000s	15.0/s	n	Y
5.		Leica SL	4400	Y	3.0 / 1040	fixed	Y	1/8000s	11.0/s	n	n
6.		Leica SL2	5760	Y	3.2 / 2100	fixed	Y	1/8000s	10.0/s	n	Y
7.		Leica SL2-S	5760	Y	3.2 / 2100	fixed	Y	1/8000s	20.0/s	n	Y
8.		Nikon Z8	3690	Y	3.2 / 2089	full-flex	Y	1/32000s	30.0/s	n	Y
9.		Panasonic G9	3680	Y	3.0 / 1040	swivel	Y	1/8000s	20.0/s	n	Y
10.		Panasonic GH5	3680	n	3.2 / 1620	swivel	Y	1/8000s	12.0/s	n	Y
11.		Panasonic GH6	3680	n	3.0 / 1840	full-flex	Y	1/8000s	14.0/s	n	Y
12.		Panasonic S5	2360	n	3.0 / 1840	swivel	Y	1/8000s	7.0/s	n	Y
13.		Panasonic S5 II	3680	n	3.0 / 1840	swivel	Y	1/8000s	9.0/s	n	Y
14.		Sony A1	9437	n	3.0 / 1440	tilting	Y	1/8000s	10.0/s	n	Y
15.		Sony A7R V	9440	n	3.2 / 2100	full-flex	Y	1/8000s	10.0/s	n	Y
16.		Sony A9 III	9440	n	3.2 / 2100	full-flex	Y	1/80000s	120.0/s	n	Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One feature that is present on the Leica SL3, but is missing on the G9 II 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 SL3 and the Panasonic G9 II 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.

The Leica SL3 writes its imaging data to CFexpress (type B) or SDXC cards, while the G9 II uses SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. Moreover, both cameras support UHS-II cards (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 SL3 and Panasonic Lumix DC-G9 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.		Leica SL3	Y	stereo / mono	Y	Y	full	3.1	Y	-	Y
2.		Panasonic G9 II	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
3.		Hasselblad X2D 100C	Y	stereo / mono	-	-	-	3.2	Y	-	-
4.		Leica Q3	Y	stereo / mono	-	-	micro	3.1	Y	-	Y
5.		Leica SL	Y	stereo / mono	Y	Y	full	3.0	Y	-	-
6.		Leica SL2	Y	stereo / mono	Y	Y	full	3.1	Y	-	Y
7.		Leica SL2-S	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
8.		Nikon Z8	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
9.		Panasonic G9	Y	stereo / mono	Y	Y	full	3.0	Y	-	Y
10.		Panasonic GH5	Y	stereo / mono	Y	Y	full	3.1	Y	-	Y
11.		Panasonic GH6	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
12.		Panasonic S5	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
13.		Panasonic S5 II	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
14.		Sony A1	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
15.		Sony A7R V	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
16.		Sony A9 III	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y

Both the Leica SL3 and the G9 II are recent models that are part of the current product line-up. The G9 II replaced the earlier Panasonic G9, while the Leica SL3 followed on from the Leica SL2. Further information on the features and operation of the Leica SL3 and G9 II can be found, respectively, in the Leica SL3 Manual (free pdf) or the online Panasonic G9 II Manual.

Review summary

So what is the bottom line? Which of the two cameras – the Leica SL3 or the Panasonic G9 II – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.

Arguments in favor of the Leica SL3:

• More detail: Offers more megapixels (60.3 vs 25MP) with a 58% higher linear resolution.
• Better image quality: Features bigger pixels on a larger sensor for higher quality imaging.
• Richer colors: The pixel size advantage translates into images with better, more accurate colors.
• More dynamic range: Larger pixels capture a wider spectrum of light and dark details.
• Better low-light sensitivity: Larger pixels means good image quality even under poor lighting.
• Better video: Provides higher definition movie capture (8K/30p vs 5.7K/60p).
• More detailed viewfinder: Has higher resolution electronic viewfinder (5760k vs 3680k dots).
• 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 (2333k vs 1840k dots).
• More prestigious: Has the Leica luxury appeal, which ensures a high resale price.
• More modern: Is somewhat more recent (announced 5 months after the G9 II).

Advantages of the Panasonic Lumix DC-G9 II:

• High quality composites: Can combine several shots after pixel-shifting its sensor.
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.8x vs 0.76x).
• 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 burst: Shoots at higher frequency (10 vs 5 flaps/sec) to capture the decisive moment.
• Less heavy: Has a lower weight (by 111g or 14 percent) and is thus easier to take along.
• Longer lasting: Gets more shots (390 versus 320) out of a single battery charge.
• Faster data transfer: Supports a more advanced USB protocol (3.2 vs 3.1).
• More affordable: Was introduced into a lower priced category (73 percent cheaper at launch).
• More heavily discounted: Has been on the market for longer (launched in September 2023).

If the number of relative strengths (bullet points above) is taken as a guide, the Leica SL3 emerges as the winner of the contest (12 : 10 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 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 Leica SL3 and the Panasonic G9 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 specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it says little about, for example, the shooting experience and imaging performance of the Leica SL3 and the G9 II 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 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.		Leica SL3	..	..	4.5/5	..	..	4.5/5	Mar 2024	EUR 6 799	amazon.com
2.		Panasonic G9 II	5/5	..	4.5/5	87/100	..	4.5/5	Sep 2023	EUR 1 899	amazon.com
3.		Hasselblad X2D 100C	4/5	..	5/5	..	..	..	Sep 2022	EUR 8 699	amazon.com
4.		Leica Q3	5/5	..	4.5/5	..	..	4.5/5	May 2023	EUR 5 999	amazon.com
5.		Leica SL	4/5	..	4/5	84/100	4.5/5	4/5	Oct 2015	EUR 6 899	ebay.com
6.		Leica SL2	4/5	..	4.5/5	..	4.5/5	4/5	Nov 2019	EUR 5 999	amazon.com
7.		Leica SL2-S	4/5	..	4/5	..	4.5/5	4.5/5	Dec 2020	EUR 4 499	amazon.com
8.		Nikon Z8	5/5	..	5/5	94/100	5/5	4.5/5	May 2023	EUR 4 599	amazon.com
9.		Panasonic G9	..	+ +	5/5	85/100	5/5	5/5	Nov 2017	EUR 1 699	ebay.com
10.		Panasonic GH5	4.5/5	+ +	..	85/100	4.5/5	5/5	Jan 2017	EUR 1 999	ebay.com
11.		Panasonic GH6	5/5	+ +	5/5	87/100	5/5	5/5	Feb 2022	EUR 2 799	amazon.com
12.		Panasonic S5	4.5/5	+ +	4.5/5	88/100	4.5/5	4.5/5	Sep 2020	EUR 1 999	amazon.com
13.		Panasonic S5 II	4.5/5	+ +	5/5	90/100	4.5/5	5/5	Jan 2023	EUR 2 199	amazon.com
14.		Sony A1	5/5	o	4.5/5	93/100	4.5/5	5/5	Jan 2021	EUR 7 299	amazon.com
15.		Sony A7R V	5/5	+ +	4.5/5	92/100	..	..	Oct 2022	EUR 4 499	amazon.com
16.		Sony A9 III	4.5/5	..	..	..	..	..	Nov 2023	EUR 6 999	amazon.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The ratings are only valid when referring to cameras in the same category and of the same age. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

Check Leica SL3 price at
amazon.com
Check G9 II price at
amazon.com

Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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Check Leica SL3 price at
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Check G9 II price at
amazon.com

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