Leica SL3 vs Sony A7

The Leica SL3 and the Sony Alpha A7 are two enthusiast cameras that were officially introduced, respectively, in March 2024 and October 2013. Both the Leica SL3 and the A7 are mirrorless interchangeable lens cameras that are equipped with a full frame sensor. The Leica has a resolution of 60.3 megapixels, whereas the Sony provides 24 MP.

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

Headline Specifications

Leica SL3		Sony A7
Mirrorless system camera		Mirrorless system camera
Leica L mount lenses		Sony E mount lenses
60.3 MP – Full Frame sensor		24 MP – Full Frame sensor
8K/30p Video		1080/60p Video
ISO 100-100,000		ISO 100-25,600 (50 - 51,200)
Electronic viewfinder (5760k dots)		Electronic viewfinder (2400k dots)
3.2" LCD – 2333k dots		3.0" LCD – 1230k dots
Tilting touchscreen		Tilting screen (no touchscreen)
5 shutter flaps per second		5 shutter flaps per second
In-body stabilization		Lens stabilization only
Weathersealed body		Weathersealed body
320 shots per battery charge		340 shots per battery charge
141 x 108 x 85 mm, 854 g		127 x 94 x 48 mm, 474 g

Check Leica SL3 price at
amazon.com
Check A7 offers at
ebay.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Leica SL3 and the Sony Alpha A7? 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 and the Sony A7 is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size 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 Sony A7 is notably smaller (22 percent) than the Leica SL3. Moreover, the A7 is substantially lighter (44 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 A7 can take 340 images on a single charge of its Sony NP-FW50 power pack. The battery packs of both cameras can be charged via USB, which can be very convenient when travelling.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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 SL3	141 mm	108 mm	85 mm	854 g	320	Y	Mar 2024	EUR 6 799	amazon.com
2.		Sony A7	127 mm	94 mm	48 mm	474 g	340	Y	Oct 2013	EUR 1 499	ebay.com
3.		Leica Q3	130 mm	80 mm	93 mm	743 g	350	Y	May 2023	EUR 5 999	amazon.com
4.		Leica SL	147 mm	104 mm	39 mm	847 g	400	Y	Oct 2015	EUR 6 899	ebay.com
5.		Leica SL2	146 mm	107 mm	42 mm	953 g	370	Y	Nov 2019	EUR 5 999	amazon.com
6.		Leica SL2-S	146 mm	107 mm	83 mm	931 g	510	Y	Dec 2020	EUR 4 499	amazon.com
7.		Leica SL3-S	141 mm	108 mm	85 mm	852 g	315	Y	Jan 2025	EUR 5 199	amazon.com
8.		Panasonic S1 II	134 mm	102 mm	92 mm	800 g	350	Y	May 2025	EUR 3 499	amazon.com
9.		Panasonic S5 II	134 mm	102 mm	90 mm	740 g	370	Y	Jan 2023	EUR 2 199	amazon.com
10.		Samsung NX1	139 mm	102 mm	66 mm	550 g	500	Y	Sep 2014	EUR 1 499	ebay.com
11.		Sony A1	129 mm	97 mm	81 mm	737 g	530	Y	Jan 2021	EUR 7 299	amazon.com
12.		Sony A1 II	136 mm	97 mm	83 mm	743 g	520	Y	Nov 2024	EUR 7 499	amazon.com
13.		Sony A7 II	127 mm	96 mm	60 mm	599 g	350	Y	Nov 2014	EUR 2 099	ebay.com
14.		Sony A7C	124 mm	71 mm	60 mm	509 g	740	Y	Sep 2020	EUR 2 099	amazon.com
15.		Sony A7R	127 mm	94 mm	48 mm	465 g	340	Y	Oct 2013	EUR 2 099	ebay.com
16.		Sony A7S	127 mm	94 mm	48 mm	489 g	380	Y	Apr 2014	EUR 2 399	ebay.com
17.		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

The price is, of course, an important factor in any camera decision. 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 A7 was launched at a markedly lower price (by 76 percent) than the Leica SL3, 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. 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. 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.

Both cameras under consideration feature a full frame sensor, but their sensors differ slightly in size. The sensor area in the A7 is 1 percent smaller. They nevertheless have the same format factor of 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

With 60.3MP, the Leica SL3 offers a higher resolution than the A7 (24MP), but the Leica SL3 has smaller individual pixels (pixel pitch of 3.79μm versus 5.97μm for the A7). However, the Leica SL3 is a much more recent model (by 10 years and 4 months) than the A7, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixels. Coming back to sensor resolution, it should be mentioned that the Leica SL3 has no anti-alias filter installed, so that it can capture all the detail its 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 Sony A7 are 30 x 20 inches or 76.2 x 50.8 cm for good quality, 24 x 16 inches or 61 x 40.6 cm for very good quality, and 20 x 13.3 inches or 50.8 x 33.9 cm for excellent quality prints.

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 Sony Alpha A7 are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-51200.

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 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 SL3	Full Frame	60.3	9520	6336	8K/30p	25.4	14.8	3295	97
2.		Sony A7	Full Frame	24.0	6000	4000	1080/60p	24.8	14.2	2248	90
3.		Leica Q3	Full Frame	60.3	9528	6328	8K/30p	25.4	14.7	3216	96
4.		Leica SL	Full Frame	24.0	6000	4000	4K/30p	25.0	13.4	1821	88
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-S	Full Frame	24.0	6000	4000	6K/30p	25.4	14.8	3383	97
8.		Panasonic S1 II	Full Frame	24.0	6000	4000	6K/30p	25.4	14.8	3406	97
9.		Panasonic S5 II	Full Frame	24.0	6000	4000	6K/30p	25.4	14.6	3158	96
10.		Samsung NX1	APS-C	28.0	6480	4320	4K/30p	24.2	13.2	1363	83
11.		Sony A1	Full Frame	49.8	8640	5760	8k/30p	25.9	14.5	3163	98
12.		Sony A1 II	Full Frame	49.8	8640	5760	8k/30p	25.4	14.8	3363	97
13.		Sony A7 II	Full Frame	24.0	6000	4000	1080/60p	24.9	13.6	2449	90
14.		Sony A7C	Full Frame	24.0	6000	4000	4K/30p	25.0	14.7	3407	95
15.		Sony A7R	Full Frame	36.2	7360	4912	1080/60p	25.6	14.1	2746	95
16.		Sony A7S	Full Frame	12.0	4240	2832	1080/60p	23.9	13.2	3702	87
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 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 A7. It can shoot video footage at 8K/30p, while the Sony is limited to 1080/60p.

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 Leica SL3 offers a substantially higher resolution than the one in the A7 (5760k vs 2400k dots). The table below summarizes some of the other core capabilities of the Leica SL3 and Sony A7 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.		Leica SL3	5760	Y	3.2 / 2333	tilting	Y	1/8000s	5.0/s	n	Y
2.		Sony A7	2400	n	3.0 / 1230	tilting	n	1/8000s	5.0/s	n	n
3.		Leica Q3	5760	n	3.0 / 1840	tilting	Y	1/2000s	15.0/s	n	Y
4.		Leica SL	4400	Y	3.0 / 1040	fixed	Y	1/8000s	11.0/s	n	n
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-S	5760	Y	3.2 / 2333	tilting	Y	1/8000s	30.0/s	n	Y
8.		Panasonic S1 II	5760	n	3.2 / 1840	full-flex	Y	1/8000s	10.0/s	n	Y
9.		Panasonic S5 II	3680	n	3.0 / 1840	swivel	Y	1/8000s	9.0/s	n	Y
10.		Samsung NX1	2360	Y	3.0 / 1036	tilting	Y	1/8000s	15.0/s	Y	n
11.		Sony A1	9437	n	3.0 / 1440	tilting	Y	1/8000s	30.0/s	n	Y
12.		Sony A1 II	9437	n	3.2 / 2100	full-flex	Y	1/8000s	30.0/s	n	Y
13.		Sony A7 II	2400	n	3.0 / 1230	tilting	n	1/8000s	5.0/s	n	Y
14.		Sony A7C	2360	n	3.0 / 922	swivel	Y	1/4000s	10.0/s	n	Y
15.		Sony A7R	2400	n	3.0 / 1230	tilting	n	1/8000s	4.0/s	n	n
16.		Sony A7S	2400	n	3.0 / 921	tilting	n	1/8000s	5.0/s	n	n
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, but is missing on the A7 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, the Leica SL3 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 Leica SL3 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.

The Leica SL3 writes its imaging data to CFexpress (type B) or SDXC cards, while the A7 uses SDXC or Memory Stick PRO Duo cards. The Leica SL3 features dual card slots, which can be very useful in case a memory card fails. In contrast, the A7 only has one slot. The Leica SL3 supports UHS-II cards (Ultra High Speed data transfer of up to 312 MB/s), while the A7 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 Leica SL3 and Sony Alpha A7 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.		Sony A7	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-
3.		Leica Q3	Y	stereo / mono	-	-	micro	3.1	Y	-	Y
4.		Leica SL	Y	stereo / mono	Y	Y	full	3.0	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-S	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
8.		Panasonic S1 II	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
9.		Panasonic S5 II	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
10.		Samsung NX1	Y	stereo / mono	Y	Y	micro	3.0	Y	Y	Y
11.		Sony A1	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
12.		Sony A1 II	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
13.		Sony A7 II	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-
14.		Sony A7C	Y	stereo / mono	Y	Y	micro	3.2	Y	Y	Y
15.		Sony A7R	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-
16.		Sony A7S	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-
17.		Sony A9 III	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y

The Leica SL3 is a recent model that features in the current product line-up of Leica. In contrast, the A7 has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the A7 was succeeded by the Sony A7 II. Further information on the features and operation of the Leica SL3 and A7 can be found, respectively, in the Leica SL3 Manual (free pdf) or the online Sony A7 Manual.

Review summary

So what is the bottom line? Is there a clear favorite between the Leica SL3 and the Sony A7? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

Advantages of the Leica SL3:

• More detail: Offers more megapixels (60.3 vs 24MP) with a 59% higher linear resolution.
• 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 1080/60p).
• More detailed viewfinder: Has higher resolution electronic viewfinder (5760k vs 2400k dots).
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.76x vs 0.71x).
• 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 1230k dots).
• Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
• Less disturbing: Has an electronic shutter option for completely silent shooting.
• Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
• Sharper images: Has hand-shake reducing image stabilization built-in.
• Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
• More solid recording: Has a full-sized HDMI port for a sturdy connection to an external recorder.
• 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 prestigious: Has the Leica luxury appeal, which ensures a high resale price.
• More modern: Reflects 10 years and 4 months of technical progress since the A7 launch.

Reasons to prefer the Sony Alpha A7:

• Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
• More compact: Is smaller (127x94mm vs 141x108mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight (by 380g or 44 percent) and is thus easier to take along.
• Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
• More affordable: Was introduced into a lower priced category (76 percent cheaper at launch).
• More heavily discounted: Has been around for much longer (launched in October 2013).

If the number of relative strengths (bullet points above) is taken as a guide, the Leica SL3 is the clear winner of the match-up (19 : 6 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 sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape 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 Sony A7 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 remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the Leica SL3 or the A7. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.

Expert reviews

This is why hands-on reviews by experts are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear 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.		Sony A7	5/5	+ +	..	80/100	5/5	5/5	Oct 2013	EUR 1 499	ebay.com
3.		Leica Q3	5/5	..	4.5/5	..	..	4.5/5	May 2023	EUR 5 999	amazon.com
4.		Leica SL	4/5	..	4/5	84/100	4.5/5	4/5	Oct 2015	EUR 6 899	ebay.com
5.		Leica SL2	4/5	..	4.5/5	..	4.5/5	4/5	Nov 2019	EUR 5 999	amazon.com
6.		Leica SL2-S	4/5	..	4/5	..	4.5/5	4.5/5	Dec 2020	EUR 4 499	amazon.com
7.		Leica SL3-S	..	..	..	..	..	..	Jan 2025	EUR 5 199	amazon.com
8.		Panasonic S1 II	..	..	..	..	..	..	May 2025	EUR 3 499	amazon.com
9.		Panasonic S5 II	4.5/5	+ +	5/5	90/100	4.5/5	5/5	Jan 2023	EUR 2 199	amazon.com
10.		Samsung NX1	5/5	..	..	87/100	5/5	5/5	Sep 2014	EUR 1 499	ebay.com
11.		Sony A1	5/5	o	4.5/5	93/100	4.5/5	5/5	Jan 2021	EUR 7 299	amazon.com
12.		Sony A1 II	..	..	..	..	..	..	Nov 2024	EUR 7 499	amazon.com
13.		Sony A7 II	5/5	+	4/5	82/100	4.5/5	5/5	Nov 2014	EUR 2 099	ebay.com
14.		Sony A7C	3.5/5	..	3.5/5	86/100	4/5	4/5	Sep 2020	EUR 2 099	amazon.com
15.		Sony A7R	5/5	+ +	..	82/100	4.5/5	5/5	Oct 2013	EUR 2 099	ebay.com
16.		Sony A7S	4/5	..	..	86/100	4.5/5	5/5	Apr 2014	EUR 2 399	ebay.com
17.		Sony A9 III	4.5/5	..	..	91/100	..	..	Nov 2023	EUR 6 999	amazon.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. 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. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

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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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