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Leica SL3 vs Pentax 645Z

The Leica SL3 and the Pentax 645Z are two digital cameras that were revealed to the public, respectively, in March 2024 and April 2014. The Leica SL3 is a mirrorless interchangeable lens camera, while the 645Z is a DSLR. The cameras are based on a full frame (Leica SL3) and a medium format (645Z) sensor. The Leica has a resolution of 60.3 megapixels, whereas the Pentax provides 51.1 MP.

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

Headline Specifications
Leica SL3
versus
Pentax 645Z
Leica SL3   Pentax 645Z
Mirrorless system camera Digital single lens reflex
Leica L mount lenses Pentax 645 mount lenses
60.3 MP – Full Frame sensor 51.1 MP – Medium Format sensor
8K/30p Video 1080/60i Video
ISO 100-100,000 ISO 100-204,800
Electronic viewfinder (5760k dots) Optical viewfinder
3.2" LCD – 2333k dots 3.2" LCD – 1037k dots
Tilting touchscreen Tilting screen (no touchscreen)
5 shutter flaps per second 3 shutter flaps per second
In-body stabilizationLens stabilization only
Weathersealed bodyWeathersealed body
320 shots per battery charge650 shots per battery charge
141 x 108 x 85 mm, 854 g 156 x 117 x 123 mm, 1550 g
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Check Leica SL3 price at
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Check 645Z offers at
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Going beyond this snapshot of core features and characteristics, what are the differences between the Leica SL3 and the Pentax 645Z? 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.

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Body comparison

The physical size and weight of the Leica SL3 and the Pentax 645Z 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.

Size Leica SL3 vs Pentax 645Z
Compare Leica SL3 versus 645Z top
Comparison Leica SL3 or 645Z rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax 645Z is notably larger (20 percent) than the Leica SL3. Moreover, the 645Z is substantially heavier (81 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 645Z can take 650 images on a single charge of its Pentax D-LI90 power pack. The power pack in the Leica SL3 can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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.

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Body Specifications
  empty 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.
 
Pentax 645Z 156 mm 117 mm 123 mm 1550 g 650 Y Apr 2014 EUR 6 999ebay.com
3.
 
Canon 5DS 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 EUR 3 499ebay.com
4.
 
Canon 5DS R 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 EUR 3 699ebay.com
5.
 
Hasselblad X1D 150 mm 98 mm 71 mm 725 g .. Y Jun 2016 EUR 9 399ebay.com
6.
 
Leica Q3 130 mm 80 mm 93 mm 743 g 350 Y May 2023 EUR 5 999 amazon.com
7.
 
Leica SL 147 mm 104 mm 39 mm 847 g 400 Y Oct 2015 EUR 6 899ebay.com
8.
 
Leica SL2 146 mm 107 mm 42 mm 953 g 370 Y Nov 2019 EUR 5 999 amazon.com
9.
 
Leica SL2-S 146 mm 107 mm 83 mm 931 g 510 Y Dec 2020 EUR 4 499 amazon.com
10.
 
Leica SL3-S 141 mm 108 mm 85 mm 852 g 315 Y Jan 2025 EUR 5 199 amazon.com
11.
 
Panasonic S1 II 134 mm 102 mm 92 mm 800 g 350 Y May 2025 EUR 3 499 amazon.com
12.
 
Panasonic S5 II 134 mm 102 mm 90 mm 740 g 370 Y Jan 2023 EUR 2 199 amazon.com
13.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 EUR 9 995ebay.com
14.
 
Sony A1 129 mm 97 mm 81 mm 737 g 530 Y Jan 2021 EUR 7 299 amazon.com
15.
 
Sony A1 II 136 mm 97 mm 83 mm 743 g 520 Y Nov 2024 EUR 7 499 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.

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 Leica SL3 was launched at a somewhat lower price (by 18 percent) than the 645Z, which makes it more attractive for photographers on a tight budget. 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 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. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better 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 SL3 features a full frame sensor and the Pentax 645Z a medium format sensor. The sensor area in the 645Z is 66 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 0.79. The sensor in the Leica SL3 has a native 3:2 aspect ratio, while the one in the 645Z offers a 4:3 aspect.

Leica SL3 and Pentax 645Z sensor measures

Despite having a smaller sensor, the Leica SL3 offers a higher resolution of 60.3 megapixels, compared with 51.1 MP of the Pentax 645Z. 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 3.79μm versus 5.30μm for the 645Z). However, it should be noted that the Leica SL3 is much more recent (by 9 years and 10 months) than the 645Z, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently. 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 Pentax 645Z are 41.3 x 31 inches or 104.9 x 78.6 cm for good quality, 33 x 24.8 inches or 83.9 x 62.9 cm for very good quality, and 27.5 x 20.6 inches or 69.9 x 52.4 cm for excellent quality prints.

The Leica SL3 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

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 Pentax 645Z are ISO 100 to ISO 204800 (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.

Leica SL3 versus 645Z MP

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.

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Sensor Characteristics
  empty 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 63368K/30p25.414.8329597
2.
 
Pentax 645Z Medium Format 51.1 8256 61921080/60i26.014.74505101
3.
 
Canon 5DS Full Frame 50.3 8688 57921080/30p24.712.4238187
4.
 
Canon 5DS R Full Frame 50.3 8688 57921080/30p24.612.4230886
5.
 
Hasselblad X1D Medium Format 51.3 8272 62001080/25p26.214.84489102
6.
 
Leica Q3 Full Frame 60.3 9528 63288K/30p25.414.7321696
7.
 
Leica SL Full Frame 24.0 6000 40004K/30p25.013.4182188
8.
 
Leica SL2 Full Frame 46.7 8368 55844K/60p25.314.3286695
9.
 
Leica SL2-S Full Frame 24.0 6000 40004K/60p25.214.1350495
10.
 
Leica SL3-S Full Frame 24.0 6000 40006K/30p25.414.8338397
11.
 
Panasonic S1 II Full Frame 24.0 6000 40006K/30p25.414.8340697
12.
 
Panasonic S5 II Full Frame 24.0 6000 40006K/30p25.414.6315896
13.
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282
14.
 
Sony A1 Full Frame 49.8 8640 57608k/30p25.914.5316398
15.
 
Sony A1 II Full Frame 49.8 8640 57608k/30p25.414.8336397
16.
 
Sony A9 III Full Frame 24.0 6000 40004K/120p25.414.7324396
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 Leica SL3 provides a higher video resolution than the 645Z. It can shoot video footage at 8K/30p, while the Pentax is limited to 1080/60i.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the Leica SL3 has an electronic viewfinder (5760k dots), while the 645Z has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The viewfinder in the Leica SL3 offers a wider field of view (100%) than the one in the 645Z (98%), so that a larger proportion of the captured image is visible in the finder. On the other hand, the viewfinder of the 645Z has a higher magnification (0.78x vs 0.76x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Leica SL3 and Pentax 645Z along with similar information for a selection of comparators.

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Core Features
  empty 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 SL35760 Y3.2 / 2333 tilting Y 1/8000s 5.0/s n Y
2.
 
Pentax 645Zoptical Y3.2 / 1037 tilting n 1/4000s 3.0/s n n
3.
 
Canon 5DSoptical Y3.2 / 1040 fixed n 1/8000s 5.0/s n n
4.
 
Canon 5DS Roptical Y3.2 / 1040 fixed n 1/8000s 5.0/s n n
5.
 
Hasselblad X1D2360 n3.0 / 920 fixed Y 1/2000s 2.3/s n n
6.
 
Leica Q35760 n3.0 / 1840 tilting Y 1/2000s 15.0/s n Y
7.
 
Leica SL4400 Y3.0 / 1040 fixed Y 1/8000s 11.0/s n n
8.
 
Leica SL25760 Y3.2 / 2100 fixed Y 1/8000s 10.0/s n Y
9.
 
Leica SL2-S5760 Y3.2 / 2100 fixed Y 1/8000s 20.0/s n Y
10.
 
Leica SL3-S5760 Y3.2 / 2333 tilting Y 1/8000s 30.0/s n Y
11.
 
Panasonic S1 II5760 n3.2 / 1840 full-flex Y 1/8000s 10.0/s n Y
12.
 
Panasonic S5 II3680 n3.0 / 1840 swivel Y 1/8000s 9.0/s n Y
13.
 
Pentax 645Doptical Y3.0 / 921 fixed n 1/4000s 1.1/s n n
14.
 
Sony A19437 n3.0 / 1440 tilting Y 1/8000s 30.0/s n Y
15.
 
Sony A1 II9437 n3.2 / 2100 full-flex Y 1/8000s 30.0/s n Y
16.
 
Sony A9 III9440 n3.2 / 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 differentiates the Leica SL3 and the 645Z is in-body image stabilization (IBIS). The Leica SL3 reduces the risk of handshake-induced blur with all attached lenses, while the 645Z offers no blur reduction with lenses that themselves do not provide optical image stabilization.

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 and the Pentax 645Z 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 645Z uses SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. The Leica SL3 supports UHS-II cards (Ultra High Speed data transfer of up to 312 MB/s), while the 645Z 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 Pentax 645Z and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
  empty Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Leica SL3Ystereo / monoYYfull3.1Y-Y
2.
 
Pentax 645ZYstereo / monoY-mini3.0---
3.
 
Canon 5DSYmono / monoY-mini3.0---
4.
 
Canon 5DS RYmono / monoY-mini3.0---
5.
 
Hasselblad X1DYstereo / monoYYmini3.0Y--
6.
 
Leica Q3Ystereo / mono--micro3.1Y-Y
7.
 
Leica SLYstereo / monoYYfull3.0Y--
8.
 
Leica SL2Ystereo / monoYYfull3.1Y-Y
9.
 
Leica SL2-SYstereo / monoYYfull3.2Y-Y
10.
 
Leica SL3-SYstereo / monoYYfull3.2Y-Y
11.
 
Panasonic S1 IIYstereo / monoYYfull3.2Y-Y
12.
 
Panasonic S5 IIYstereo / monoYYfull3.2Y-Y
13.
 
Pentax 645DYstereo / ----2.0---
14.
 
Sony A1Ystereo / monoYYfull3.2Y-Y
15.
 
Sony A1 IIYstereo / monoYYfull3.2Y-Y
16.
 
Sony A9 IIIYstereo / monoYYfull3.2Y-Y

It is notable that the Leica SL3 has a headphone jack, which is not present on the 645Z This port makes it possible to attach external headphones and monitor the quality of sound during the recording process.

Studio photographers will appreciate that the Pentax 645Z (unlike the Leica SL3) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

The Leica SL3 is a recent model that features in the current product line-up of Leica. In contrast, the 645Z has been discontinued (but can be found pre-owned on ebay). There has not been a direct replacement model for the 645Z from Pentax. Further information on the features and operation of the Leica SL3 and 645Z can be found, respectively, in the Leica SL3 Manual (free pdf) or the online Pentax 645Z Manual.

Review summary

So what conclusions can be drawn? Is there a clear favorite between the Leica SL3 and the Pentax 645Z? Which camera is better? The listing below highlights the relative strengths of the two models.

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Arguments in favor of the Leica SL3:

  • More detail: Offers more megapixels (60.3 vs 51.1MP) with a 11% higher linear resolution.
  • Better video: Provides higher definition movie capture (8K/30p vs 1080/60i).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • More complete view: Has a viewfinder with a larger field of view (100% vs 98%).
  • More detailed LCD: Has a higher resolution rear screen (2333k vs 1037k dots).
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (5 vs 3 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More compact: Is smaller (141x108mm vs 156x117mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 696g or 45 percent) and hence easier to carry around.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • Sharper images: Has hand-shake reducing image stabilization built-in.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • 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 affordable: Was introduced into a lower priced segment (18 percent cheaper at launch).
  • More modern: Reflects 9 years and 10 months of technical progress since the 645Z launch.

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Advantages of the Pentax 645Z:

  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.76x).
  • Longer lasting: Gets more shots (650 versus 320) out of a single battery charge.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • More heavily discounted: Has been around for much longer (launched in April 2014).

If the count of relative strengths (bullet points above) is taken as a measure, the Leica SL3 is the clear winner of the match-up (23 : 5 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.

Leica SL3 23:05 645Z

How about other alternatives? Do the specifications of the Leica SL3 and the Pentax 645Z place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best DSLR Camera listings 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 645Z 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.

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Expert Camera Reviews
  empty  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.
 
Pentax 645Z5/5..3.5/5..4.5/55/5 Apr 2014 EUR 6 999ebay.com
3.
 
Canon 5DS..+..83/1004.5/54.5/5 Feb 2015 EUR 3 499ebay.com
4.
 
Canon 5DS R5/5+..83/1005/54.5/5 Feb 2015 EUR 3 699ebay.com
5.
 
Hasselblad X1D..o..81/100..4/5 Jun 2016 EUR 9 399ebay.com
6.
 
Leica Q35/5..4.5/5....4.5/5 May 2023 EUR 5 999 amazon.com
7.
 
Leica SL4/5..4/584/1004.5/54/5 Oct 2015 EUR 6 899ebay.com
8.
 
Leica SL24/5..4.5/5..4.5/54/5 Nov 2019 EUR 5 999 amazon.com
9.
 
Leica SL2-S4/5..4/5..4.5/54.5/5 Dec 2020 EUR 4 499 amazon.com
10.
 
Leica SL3-S............ Jan 2025 EUR 5 199 amazon.com
11.
 
Panasonic S1 II............ May 2025 EUR 3 499 amazon.com
12.
 
Panasonic S5 II4.5/5+ +5/590/1004.5/55/5 Jan 2023 EUR 2 199 amazon.com
13.
 
Pentax 645D5/5.......... Mar 2010 EUR 9 995ebay.com
14.
 
Sony A15/5o4.5/593/1004.5/55/5 Jan 2021 EUR 7 299 amazon.com
15.
 
Sony A1 II............ Nov 2024 EUR 7 499 amazon.com
16.
 
Sony A9 III4.5/5....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 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 comparing ratings of very distinct cameras or ones that are far apart in terms of their release date 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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Check Leica SL3 price at
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Check 645Z offers at
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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 use the search menu 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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    Specifications: Leica SL3 vs Pentax 645Z

    Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.

    Camera Specifications
    Camera Model Leica SL3 Pentax 645Z
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Leica L mount lenses Pentax 645 mount lenses
    Launch Date March 2024 April 2014
    Launch Price USD 6,999 USD 8,499
    Sensor Specs Leica SL3 Pentax 645Z
    Sensor Technology CMOS CMOS
    Sensor Format Full Frame Sensor Medium Format Sensor
    Sensor Size 36.0 x 24.0 mm 43.8 x 32.8 mm
    Sensor Area 864 mm2 1436.64 mm2
    Sensor Diagonal 43.3 mm 54.7 mm
    Crop Factor 1.0x 0.79x
    Sensor Resolution 60.3 Megapixels 51.1 Megapixels
    Image Resolution 9520 x 6336 pixels 8256 x 6192 pixels
    Pixel Pitch 3.79 μm 5.30 μm
    Pixel Density 6.98 MP/cm2 3.56 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability 8K/30p Video 1080/60i Video
    ISO Setting 100 - 100,000 ISO 100 - 204,800 ISO
    ISO Boost 50 - 100,000 ISO no Enhancement
    Image Processor Maestro IV PRIME III
    DXO Sensor Quality (score) .. 101
    DXO Color Depth (bits) .. 26.0
    DXO Dynamic Range (EV) .. 14.7
    DXO Low Light (ISO) .. 4505
    Screen Specs Leica SL3 Pentax 645Z
    Viewfinder Type Electronic viewfinder Optical viewfinder
    Viewfinder Field of View 100% 98%
    Viewfinder Magnification 0.76x 0.78x
    Viewfinder Resolution 5760k dots
    Top-Level Screen Control Panel Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.2inch 3.2inch
    LCD Resolution 2333k dots 1037k dots
    LCD Attachment Tilting screen Tilting screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Leica SL3 Pentax 645Z
    Focus System On-Sensor Phase-detect Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/4000s
    Continuous Shooting 5 shutter flaps/s 3 shutter flaps/s
    Shutter Life Expectancy400 000 actuations100 000 actuations
    Electronic Shutterup to 1/16000sno E-Shutter
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Image StabilizationIn-body stabilizationLens stabilization only
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium CFexB or SDXC cards SDXC cards
    Single or Dual Card Slots Dual card slots Dual card slots
    UHS card support UHS-II UHS-I
    Connectivity Specs Leica SL3 Pentax 645Z
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 3.1 USB 3.0
    HDMI Port full HDMI mini HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket Headphone port no Headphone port
    Wifi Support Wifi built-in no Wifi
    Bluetooth Support Bluetooth built-in no Bluetooth
    Body Specs Leica SL3 Pentax 645Z
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type Leica BP-SCL6 Pentax D-LI90
    Battery Life (CIPA)320 shots per charge650 shots per charge
    In-Camera Charging USB charging no USB charging
    Body Dimensions 141 x 108 x 85 mm
    (5.6 x 4.3 x 3.3 in)
    156 x 117 x 123 mm
    (6.1 x 4.6 x 4.8 in)
    Camera Weight 854 g (30.1 oz) 1550 g (54.7 oz)
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