Leica SL3-S vs Panasonic G9 II

The Leica SL3-S and the Panasonic Lumix DC-G9 II are two enthusiast cameras that were announced, respectively, in January 2025 and September 2023. Both the Leica SL3-S and the G9 II are mirrorless interchangeable lens cameras that are based on a full frame (Leica SL3-S) and a Four Thirds (G9 II) sensor. The Leica has a resolution of 24 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-S		Panasonic G9 II
Mirrorless system camera		Mirrorless system camera
Leica L mount lenses		Micro Four Thirds lenses
24 MP – Full Frame sensor		25 MP – Four Thirds sensor
6K/30p Video		5.7K/60p Video
ISO 100-50,000 (50 - 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
30 shutter flaps per second		10 shutter flaps per second
In-body stabilization		In-body stabilization
Weathersealed body		Weathersealed body
315 shots per battery charge		390 shots per battery charge
141 x 108 x 85 mm, 852 g		134 x 102 x 90 mm, 658 g

Check Leica SL3-S 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-S 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

An illustration of the physical size and weight of the Leica SL3-S and the Panasonic G9 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 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-S. Moreover, the G9 II is markedly lighter (23 percent) than the Leica SL3-S. 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-S gets 315 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-S	141 mm	108 mm	85 mm	852 g	315	Y	Jan 2025	US$ 5 299	amazon.com
2.		Panasonic G9 II	134 mm	102 mm	90 mm	658 g	390	Y	Sep 2023	US$ 1 899	amazon.com
3.		Canon R1	158 mm	150 mm	87 mm	1115 g	1330	Y	Jul 2024	US$ 6 299	amazon.com
4.		Canon R3	150 mm	143 mm	87 mm	1015 g	760	Y	Sep 2021	US$ 5 999	amazon.com
5.		Leica SL2	146 mm	107 mm	42 mm	953 g	370	Y	Nov 2019	US$ 5 999	amazon.com
6.		Leica SL2-S	146 mm	107 mm	83 mm	931 g	510	Y	Dec 2020	US$ 4 899	amazon.com
7.		Leica SL3	141 mm	108 mm	85 mm	854 g	320	Y	Mar 2024	US$ 6 999	amazon.com
8.		Nikon Z5 II	134 mm	101 mm	72 mm	700 g	330	Y	Apr 2025	US$ 1 699	amazon.com
9.		Panasonic G9	137 mm	97 mm	92 mm	658 g	400	Y	Nov 2017	US$ 1 699	ebay.com
10.		Panasonic GH5	139 mm	98 mm	87 mm	725 g	410	Y	Jan 2017	US$ 1 999	ebay.com
11.		Panasonic GH5 II	139 mm	98 mm	87 mm	727 g	400	Y	May 2021	US$ 1 699	amazon.com
12.		Panasonic GH6	138 mm	100 mm	100 mm	823 g	360	Y	Feb 2022	US$ 2 199	amazon.com
13.		Panasonic GH7	138 mm	100 mm	100 mm	805 g	380	Y	Jun 2024	US$ 2 199	amazon.com
14.		Panasonic S1 II	134 mm	102 mm	92 mm	800 g	350	Y	May 2025	US$ 3 199	amazon.com
15.		Panasonic S5	133 mm	98 mm	82 mm	714 g	440	Y	Sep 2020	US$ 1 999	amazon.com
16.		Panasonic S5 II	134 mm	102 mm	90 mm	740 g	370	Y	Jan 2023	US$ 1 999	amazon.com
17.		Sony A9 III	136 mm	97 mm	83 mm	702 g	530	Y	Nov 2023	US$ 5 999	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

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 G9 II was launched at a markedly lower price (by 64 percent) than the Leica SL3-S, 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 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 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. 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 tend to be associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Leica SL3-S 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-S has a native 3:2 aspect ratio, while the one in the G9 II offers a 4:3 aspect.

Despite having a smaller sensor, the G9 II offers a slightly higher resolution of 25 megapixels, compared with 24 MP of the Leica SL3-S. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.00μm versus 6.00μm for the Leica SL3-S). Moreover, it should be noted that the Leica SL3-S is a somewhat more recent model (by 1 year and 4 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.

Both cameras have the capacity to capture high quality composite images by combining multiple shots after shifting the sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).

The Leica SL3-S has a native sensitivity range from ISO 100 to ISO 50000, 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.

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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-S	Full Frame	24.0	6000	4000	6K/30p	25.4	14.8	3383	97
2.		Panasonic G9 II	Four Thirds	25.0	5776	4336	5.7K/60p	23.4	13.5	1710	78
3.		Canon R1	Full Frame	24.0	6000	4000	6K/60p	25.4	14.8	3332	97
4.		Canon R3	Full Frame	24.0	6000	4000	6K/60p	25.0	14.7	4086	96
5.		Leica SL2	Full Frame	46.7	8368	5584	4K/60p	25.3	14.3	2866	95
6.		Leica SL2-S	Full Frame	24.0	6000	4000	4K/60p	25.2	14.1	3504	95
7.		Leica SL3	Full Frame	60.3	9520	6336	8K/30p	25.4	14.8	3295	97
8.		Nikon Z5 II	Full Frame	24.4	6048	4032	4K/60p	25.4	14.8	3398	97
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 GH5 II	Four Thirds	20.2	5184	3888	4K/60p	23.7	13.1	1136	79
12.		Panasonic GH6	Four Thirds	25.0	5776	4336	5.7K/60p	23.4	13.4	1555	77
13.		Panasonic GH7	Four Thirds	25.0	5776	4336	5.7K/60p	23.4	13.6	1784	78
14.		Panasonic S1 II	Full Frame	24.0	6000	4000	6K/30p	25.4	14.8	3406	97
15.		Panasonic S5	Full Frame	24.0	6000	4000	4K/60p	25.1	14.5	2697	94
16.		Panasonic S5 II	Full Frame	24.0	6000	4000	6K/30p	25.4	14.6	3158	96
17.		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 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 Leica SL3-S provides a higher video resolution than the G9 II. It can shoot video footage at 6K/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-S offers a substantially higher resolution than the one in the G9 II (5760k vs 3680k dots). The following table reports on some other key feature differences and similarities of the Leica SL3-S, the Panasonic G9 II, 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.		Leica SL3-S	5760	Y	3.2 / 2333	tilting	Y	1/8000s	30.0/s	n	Y
2.		Panasonic G9 II	3680	n	3.0 / 1840	swivel	Y	1/8000s	10.0/s	n	Y
3.		Canon R1	9440	Y	3.2 / 2100	swivel	Y	1/8000s	12.0/s	n	Y
4.		Canon R3	5760	Y	3.2 / 4150	swivel	Y	1/8000s	12.0/s	n	Y
5.		Leica SL2	5760	Y	3.2 / 2100	fixed	Y	1/8000s	10.0/s	n	Y
6.		Leica SL2-S	5760	Y	3.2 / 2100	fixed	Y	1/8000s	20.0/s	n	Y
7.		Leica SL3	5760	Y	3.2 / 2333	tilting	Y	1/8000s	5.0/s	n	Y
8.		Nikon Z5 II	3690	n	3.2 / 2100	swivel	Y	1/8000s	14.0/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 GH5 II	3680	n	3.0 / 1840	swivel	Y	1/8000s	12.0/s	n	Y
12.		Panasonic GH6	3680	n	3.0 / 1840	full-flex	Y	1/8000s	14.0/s	n	Y
13.		Panasonic GH7	3680	n	3.0 / 1840	full-flex	Y	1/8000s	14.0/s	n	Y
14.		Panasonic S1 II	5760	n	3.2 / 1840	full-flex	Y	1/8000s	10.0/s	n	Y
15.		Panasonic S5	2360	n	3.0 / 1840	swivel	Y	1/8000s	7.0/s	n	Y
16.		Panasonic S5 II	3680	n	3.0 / 1840	swivel	Y	1/8000s	9.0/s	n	Y
17.		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-S, 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-S 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-S 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-S 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-S	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
2.		Panasonic G9 II	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
3.		Canon R1	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
4.		Canon R3	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
5.		Leica SL2	Y	stereo / mono	Y	Y	full	3.1	Y	-	Y
6.		Leica SL2-S	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
7.		Leica SL3	Y	stereo / mono	Y	Y	full	3.1	Y	-	Y
8.		Nikon Z5 II	Y	stereo / mono	Y	Y	micro	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 GH5 II	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
12.		Panasonic GH6	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
13.		Panasonic GH7	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
14.		Panasonic S1 II	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
15.		Panasonic S5	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
16.		Panasonic S5 II	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
17.		Sony A9 III	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y

Both the Leica SL3-S 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-S followed on from the Leica SL2-S. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Leica and Panasonic websites.

Review summary

So what conclusions can be drawn? Which of the two cameras – the Leica SL3-S or the Panasonic G9 II – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.

Arguments in favor of the Leica SL3-S:

• 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 (6K/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).
• Faster burst: Shoots at higher frequency (30 vs 10 flaps/sec) to capture the decisive moment.
• More prestigious: Has the Leica luxury appeal, which ensures a high resale price.
• More modern: Is somewhat more recent (announced 1 year and 4 months after the G9 II).

Reasons to prefer the Panasonic Lumix DC-G9 II:

• 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.
• Less heavy: Has a lower weight (by 194g or 23 percent) and is thus easier to take along.
• Longer lasting: Gets more shots (390 versus 315) out of a single battery charge.
• More affordable: Was introduced into a lower priced category (64 percent cheaper at launch).
• More heavily discounted: Has been on the market for longer (launched in September 2023).

If the count of relative strengths (bullet points above) is taken as a measure, the Leica SL3-S is the clear winner of the match-up (12 : 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 SL3-S 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 comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains incomplete and does no justice, for example, to the way the Leica SL3-S or the G9 II perform in practice. 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-S	..	..	..	..	..	..	Jan 2025	US$ 5 299	amazon.com
2.		Panasonic G9 II	5/5	..	4.5/5	87/100	..	4.5/5	Sep 2023	US$ 1 899	amazon.com
3.		Canon R1	..	..	..	..	..	..	Jul 2024	US$ 6 299	amazon.com
4.		Canon R3	5/5	o	4.5/5	..	5/5	4.5/5	Sep 2021	US$ 5 999	amazon.com
5.		Leica SL2	4/5	..	4.5/5	..	4.5/5	4/5	Nov 2019	US$ 5 999	amazon.com
6.		Leica SL2-S	4/5	..	4/5	..	4.5/5	4.5/5	Dec 2020	US$ 4 899	amazon.com
7.		Leica SL3	..	..	4.5/5	..	..	4.5/5	Mar 2024	US$ 6 999	amazon.com
8.		Nikon Z5 II	..	..	..	..	..	..	Apr 2025	US$ 1 699	amazon.com
9.		Panasonic G9	..	+ +	5/5	85/100	5/5	5/5	Nov 2017	US$ 1 699	ebay.com
10.		Panasonic GH5	4.5/5	+ +	..	85/100	4.5/5	5/5	Jan 2017	US$ 1 999	ebay.com
11.		Panasonic GH5 II	4.5/5	..	4.5/5	85/100	4.5/5	5/5	May 2021	US$ 1 699	amazon.com
12.		Panasonic GH6	5/5	+ +	5/5	87/100	5/5	5/5	Feb 2022	US$ 2 199	amazon.com
13.		Panasonic GH7	..	..	..	..	..	..	Jun 2024	US$ 2 199	amazon.com
14.		Panasonic S1 II	..	..	..	..	..	..	May 2025	US$ 3 199	amazon.com
15.		Panasonic S5	4.5/5	+ +	4.5/5	88/100	4.5/5	4.5/5	Sep 2020	US$ 1 999	amazon.com
16.		Panasonic S5 II	4.5/5	+ +	5/5	90/100	4.5/5	5/5	Jan 2023	US$ 1 999	amazon.com
17.		Sony A9 III	4.5/5	..	..	91/100	..	..	Nov 2023	US$ 5 999	amazon.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted 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 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.

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

Other camera comparisons

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