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Pentax 645Z vs Sony A6100

The Pentax 645Z and the Sony Alpha A6100 are two digital cameras that were announced, respectively, in April 2014 and August 2019. The 645Z is a DSLR, while the A6100 is a mirrorless interchangeable lens camera. The cameras are based on a medium format (645Z) and an APS-C (A6100) sensor. The Pentax has a resolution of 51.1 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
Pentax 645Z versus Sony A6100
Pentax 645Z Sony A6100
Digital single lens reflex Mirrorless system camera
Pentax 645 mount lenses Sony E mount lenses
51.1 MP, Medium Format Sensor 24 MP, APS-C Sensor
1080/60i Video 4K/30p Video
ISO 100-204,800 ISO 100-32,000 (100 - 51,200)
Optical viewfinder Electronic viewfinder (1440k dots)
3.2 LCD, 1037k dots 3.0 LCD, 922k dots
Tilting screen (no touchscreen) Tilting touchscreen
3 shutter flaps per second 11 shutter flaps per second
Weathersealed bodynot weather sealed
650 shots per battery charge420 shots per battery charge
156 x 117 x 123 mm, 1550 g 120 x 67 x 59 mm, 396 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Pentax 645Z and the Sony Alpha A6100? 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 Pentax 645Z and the Sony A6100 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 width, height and depth dimensions are rounded to the nearest millimeter.

The A6100 can be obtained in three different colors (black, silver, white), while the 645Z is only available in black.

Size Pentax 645Z vs Sony A6100
Compare 645Z versus A6100 top
Comparison 645Z or A6100 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A6100 is considerably smaller (56 percent) than the Pentax 645Z. Moreover, the A6100 is substantially lighter (74 percent) than the 645Z. It is worth mentioning in this context that the 645Z is splash and dust resistant, while the A6100 does not feature any corresponding weather-sealing.

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 645Z gets 650 shots out of its D-LI90 battery, while the A6100 can take 420 images on a single charge of its NP-FW50 power pack. The power pack in the A6100 can be charged via the USB port, 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. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.

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Body Specifications
    Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Pentax 645Z 156 mm 117 mm 123 mm 1550 g 650 Y Apr 2014 8,499 i
2.
 
Sony A6100 120 mm 67 mm 59 mm 396 g 420 n Aug 2019 749 i
3.
 
Canon 1D X Mark II 158 mm 168 mm 83 mm 1530 g 1210 Y Feb 2016 5,999i
4.
 
Canon 5DS 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699 i
5.
 
Canon 5DS R 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699 i
6.
 
Fujifilm X-T30 118 mm 83 mm 47 mm 383 g 380 n Feb 2019 899 i
7.
 
Hasselblad X1D 150 mm 98 mm 71 mm 725 g .. Y Jun 2016 8,995i
8.
 
Leica SL 147 mm 104 mm 39 mm 847 g 400 Y Oct 2015 7,450i
9.
 
Nikon D850 146 mm 124 mm 79 mm 1005 g 1840 Y Jul 2017 3,299 i
10.
 
Nikon D5 160 mm 159 mm 92 mm 1415 g 3780 Y Jan 2016 6,499i
11.
 
Nikon D7200 136 mm 107 mm 76 mm 765 g 1110 Y Mar 2015 1,199i
12.
 
Nikon D4S 160 mm 157 mm 91 mm 1350 g 3020 Y Feb 2014 6,499i
13.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 9,995i
14.
 
Sony A6400 120 mm 67 mm 50 mm 403 g 410 Y Jan 2019 899 i
15.
 
Sony A6000 120 mm 67 mm 45 mm 344 g 360 n Feb 2014 599i
16.
 
Sony A3000 128 mm 91 mm 85 mm 411 g 470 n Aug 2013 329i
17.
 
Sony NEX-7 120 mm 67 mm 43 mm 400 g 430 n Aug 2011 1,349i
Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.

Any camera decision will obviously take relative prices into account. 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 A6100 was launched at a markedly lower price (by 91 percent) than the 645Z, 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.

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Sensor comparison

The size of the sensor inside a digital camera is one of the key determinants 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. 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 associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Pentax 645Z features a medium format sensor and the Sony A6100 an APS-C sensor. The sensor area in the A6100 is 74 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 0.79 and 1.5. The sensor in the 645Z has a native 4:3 aspect ratio, while the one in the A6100 offers a 3:2 aspect.

Pentax 645Z and Sony A6100 sensor measures

With 51.1MP, the 645Z offers a higher resolution than the A6100 (24MP), but the 645Z nevertheless has larger individual pixels (pixel pitch of 5.30μm versus 3.91μm for the A6100) due to its larger sensor. However, the A6100 is a much more recent model (by 5 years and 4 months) than the 645Z, and its sensor will 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 the 645Z has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Pentax 645Z implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 645Z for good quality output (200 dots per inch) amounts to 41.3 x 31 inches or 104.9 x 78.6 cm, for very good quality (250 dpi) 33 x 24.8 inches or 83.9 x 62.9 cm, and for excellent quality (300 dpi) 27.5 x 20.6 inches or 69.9 x 52.4 cm. The corresponding values for the Sony A6100 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 A6100 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Pentax 645Z has a native sensitivity range from ISO 100 to ISO 204800. The corresponding ISO settings for the Sony Alpha A6100 are ISO 100 to ISO 32000, with the possibility to increase the ISO range to 100-51200.

645Z versus A6100 MP

For many cameras, data on sensor performance has been reported by DXO Mark. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. The 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
    Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Pentax 645Z Medium Format 51.1 8256 61921080/60i26.014.74505101
2.
 
Sony A6100 APS-C 24.0 6000 40004K/30p........
3.
 
Canon 1D X Mark II Full Frame 20.0 5472 36484K/60p24.113.5320788
4.
 
Canon 5DS Full Frame 50.3 8688 57921080/30p24.712.4238187
5.
 
Canon 5DS R Full Frame 50.3 8688 57921080/30p24.612.4230886
6.
 
Fujifilm X-T30 APS-C 26.0 6240 41604K/30p........
7.
 
Hasselblad X1D Medium Format 51.3 8272 62001080/25p26.214.84489102
8.
 
Leica SL Full Frame 24.0 6000 40004K/30p25.013.4182188
9.
 
Nikon D850 Full Frame 45.4 8256 55044K/30p26.414.82660100
10.
 
Nikon D5 Full Frame 20.7 5588 37124K/30p25.112.3234388
11.
 
Nikon D7200 APS-C 24.0 6000 40001080/60p24.514.6133387
12.
 
Nikon D4S Full Frame 16.2 4928 32801080/60p24.413.3307489
13.
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282
14.
 
Sony A6400 APS-C 24.0 6000 40004K/30p2413.6143183
15.
 
Sony A6000 APS-C 24.0 6000 40001080/60p24.113.1134782
16.
 
Sony A3000 APS-C 19.8 5456 36321080/60i23.712.8106878
17.
 
Sony NEX-7 APS-C 24.0 6000 40001080/60i24.113.4101681

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 A6100 provides a better video resolution than the 645Z. It can shoot movie footage at 4K/30p, while the Pentax is limited to 1080/60i.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the A6100 has an electronic viewfinder (1440k 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 A6100 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 0.70x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Pentax 645Z, the Sony A6100, and comparable cameras.

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Core Features
    Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
(000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Pentax 645Zoptical Y 3.2 1037 tilting n 1/4000s 3.0 n n
2.
 
Sony A61001440 n 3.0 922 tilting Y 1/4000s 11.0 Y n
3.
 
Canon 1D X Mark IIoptical Y 3.2 1620 fixed Y 1/8000s 16.0 n n
4.
 
Canon 5DSoptical Y 3.2 1040 fixed n 1/8000s 5.0 n n
5.
 
Canon 5DS Roptical Y 3.2 1040 fixed n 1/8000s 5.0 n n
6.
 
Fujifilm X-T302360 n 3.0 1040 tilting Y 1/4000s 8.0 Y n
7.
 
Hasselblad X1D2360 n 3.0 920 fixed Y 1/2000s 2.3 n n
8.
 
Leica SL4400 Y 3.0 1040 fixed Y 1/8000s 11.0 n n
9.
 
Nikon D850optical Y 3.2 2359 tilting Y 1/8000s 9.0 n n
10.
 
Nikon D5optical Y 3.2 2359 fixed Y 1/8000s 14.0 n n
11.
 
Nikon D7200optical Y 3.2 1229 fixed n 1/8000s 6.0 Y n
12.
 
Nikon D4Soptical Y 3.2 921 fixed n 1/8000s 11.0 n n
13.
 
Pentax 645Doptical Y 3.0 921 fixed n 1/4000s 1.1 n n
14.
 
Sony A64002359 n 3.0 922 tilting Y 1/4000s 11.0 Y n
15.
 
Sony A60001440 n 3.0 922 tilting n 1/4000s 11.0 Y n
16.
 
Sony A3000202 n 3.0 230 fixed n 1/4000s 2.5 Y n
17.
 
Sony NEX-72359 n 3.0 921 tilting n 1/4000s 10.0 Y n

One feature that is present on the 645Z, but is missing on the A6100 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 A6100 has an articulated screen that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in taking selfies. In contrast, the 645Z does not have a selfie-screen.

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 A6100 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 Pentax 645Z and the Sony A6100 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 645Z writes its imaging data to SDXC cards, while the A6100 uses SDXC or Memory Stick PRO Duo cards. The 645Z features dual card slots, which can be very useful in case a memory card fails. In contrast, the A6100 only has one slot. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.

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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 Pentax 645Z and Sony Alpha A6100 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
    Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Pentax 645ZYstereomonoY-mini3.0---
2.
 
Sony A6100YstereomonoY-micro2.0YYY
3.
 
Canon 1D X Mark IIYmonomonoYYmini3.0---
4.
 
Canon 5DSYmonomonoY-mini3.0---
5.
 
Canon 5DS RYmonomonoY-mini3.0---
6.
 
Fujifilm X-T30YstereomonoY-micro3.1Y-Y
7.
 
Hasselblad X1DYstereomonoYYmini3.0Y--
8.
 
Leica SLYstereomonoYYfull3.0Y--
9.
 
Nikon D850YstereomonoYYmini3.0YYY
10.
 
Nikon D5YstereomonoYYmini3.0---
11.
 
Nikon D7200YstereomonoYYmini2.0YY-
12.
 
Nikon D4SYmonomonoYYmini2.0---
13.
 
Pentax 645DYstereo----2.0---
14.
 
Sony A6400YstereomonoY-micro2.0YYY
15.
 
Sony A6000Ystereomono--micro2.0YY-
16.
 
Sony A3000Ystereomono--mini2.0---
17.
 
Sony NEX-7YstereomonoY-mini2.0---

It is notable that the A6100 offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the 645Z does not provide wifi capability.

Studio photographers will appreciate that the Pentax 645Z (unlike the A6100) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the 645Z and the A6100 are recent models that are part of the current product line-up. The 645Z replaced the earlier Pentax 645D, while the A6100 followed on from the Sony A6000. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Pentax and Sony websites.

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Review summary

So what conclusions can be drawn? Which of the two cameras – the Pentax 645Z or the Sony A6100 – has the upper hand? Is one clearly better than the other? A synthesis of the relative strong points of each of the models is listed below.

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Arguments in favor of the Pentax 645Z:

  • More detail: Offers more megapixels (51.1 vs 24MP) with a 43% higher linear resolution.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.70x).
  • 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 (1037k vs 922k dots).
  • Longer lasting: Can take more shots (650 versus 420) on a single battery charge.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • More heavily discounted: Has been available for much longer (launched in April 2014).

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Reasons to prefer the Sony Alpha A6100:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60i).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • 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%).
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster burst: Shoots at higher frequency (11 vs 3 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More compact: Is smaller (120x67mm vs 156x117mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 1154g or 74 percent) and is thus easier to take along.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • More affordable: Was introduced into a lower priced category (91 percent cheaper at launch).
  • More modern: Reflects 5 years and 4 months of technical progress since the 645Z launch.

If the number of relative strengths (bullet points above) is taken as a guide, the A6100 is the clear winner of the contest (19 : 13 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 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.

645Z 13:19 A6100

How about other alternatives? Do the specifications of the Pentax 645Z and the Sony A6100 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it says little about, for example, the shooting experience and imaging performance of the 645Z and the A6100 in practical situations. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is why expert reviews 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], 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
     Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Pentax 645Z5/5....4.5/55/5 Apr 2014 8,499 i
2.
 
Sony A6100....82/1004/55/5 Aug 2019 749 i
3.
 
Canon 1D X Mark II....89/1004.5/54.5/5 Feb 2016 5,999i
4.
 
Canon 5DS..+83/1004.5/54.5/5 Feb 2015 3,699 i
5.
 
Canon 5DS R5/5+83/1005/54.5/5 Feb 2015 3,699 i
6.
 
Fujifilm X-T305/5+ +84/1004.5/54.5/5 Feb 2019 899 i
7.
 
Hasselblad X1D..o81/100..4/5 Jun 2016 8,995i
8.
 
Leica SL4/5..84/1004.5/54/5 Oct 2015 7,450i
9.
 
Nikon D8504.5/5+ +89/1004.5/55/5 Jul 2017 3,299 i
10.
 
Nikon D5....89/1004.5/55/5 Jan 2016 6,499i
11.
 
Nikon D72004/5+ +84/1004.5/54.5/5 Mar 2015 1,199i
12.
 
Nikon D4S5/5....4.5/54.5/5 Feb 2014 6,499i
13.
 
Pentax 645D5/5........ Mar 2010 9,995i
14.
 
Sony A64004/5+85/1004.5/54/5 Jan 2019 899 i
15.
 
Sony A60005/5+80/1004.5/55/5 Feb 2014 599i
16.
 
Sony A30003/5+..4/54/5 Aug 2013 329i
17.
 
Sony NEX-75/5+ +81/1004.5/55/5 Aug 2011 1,349i
Notes: (+ +) 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 rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, please note that some of the review sites have changed their methodology and reporting over time.

Pentax 645Z:
Check Amazon price
Sony A6100:
Check Amazon price

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 use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications: Pentax 645Z vs Sony A6100

    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 Pentax 645Z Sony A6100
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Pentax 645 mount lenses Sony E mount lenses
    Launch Date April 2014 August 2019
    Launch Price USD 8,499 USD 749
    Sensor Specs Pentax 645Z Sony A6100
    Sensor Technology CMOS CMOS
    Sensor Format Medium Format Sensor APS-C Sensor
    Sensor Size 43.8 x 32.8 mm 23.5 x 15.6 mm
    Sensor Area 1436.64 mm2 366.6 mm2
    Sensor Diagonal 54.7 mm 28.2 mm
    Crop Factor 0.79x 1.5x
    Sensor Resolution 51.1 Megapixels 24 Megapixels
    Image Resolution 8256 x 6192 pixels 6000 x 4000 pixels
    Pixel Pitch 5.30 μm 3.91 μm
    Pixel Density 3.56 MP/cm2 6.55 MP/cm2
    Moiré control no AA filter Anti-Alias filter
    Movie Capability 1080/60i Video 4K/30p Video
    ISO Setting 100 - 204,800 ISO 100 - 32,000 ISO
    ISO Boost no Enhancement 100 - 51,200 ISO
    Image Processor PRIME III BIONZ X
    DXO Sensor Quality (score) 101 ..
    DXO Color Depth (bits) 26.0 ..
    DXO Dynamic Range (EV) 14.7 ..
    DXO Low Light (ISO) 4505 ..
    Screen Specs Pentax 645Z Sony A6100
    Viewfinder Type Optical viewfinder Electronic viewfinder
    Viewfinder Field of View 98% 100%
    Viewfinder Magnification 0.78x 0.70x
    Viewfinder Resolution 1440k dots
    Top-Level Screen Control Panel no Top Display
    LCD Framing Live View Live View
    Rear LCD Size 3.2inch 3.0inch
    LCD Resolution 1037k dots 922k dots
    LCD Attachment Tilting screen Tilting screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Pentax 645Z Sony A6100
    Focus System Phase-detect AF On-Sensor Phase-detect
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/4000s
    Continuous Shooting 3 shutter flaps/s 11 shutter flaps/s
    Shutter Life Expectancy100 000 actuations100 000 actuations
    Electronic Shutterno E-ShutterYES
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Fill Flash no On-Board Flash Build-in Flash
    Storage Medium SDXC cards MS or SDXC cards
    Second Storage Option Dual card slots Single card slot
    UHS card support UHS-I UHS-I
    Connectivity Specs Pentax 645Z Sony A6100
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 3.0 USB 2.0
    HDMI Port mini HDMI micro HDMI
    Microphone Port External MIC port External MIC port
    Wifi Support no Wifi Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Bluetooth Support no Bluetooth Bluetooth built-in
    Body Specs Pentax 645Z Sony A6100
    Environmental SealingWeathersealed bodynot weather sealed
    Battery Type D-LI90 NP-FW50
    Battery Life (CIPA)650 shots per charge420 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 156 x 117 x 123 mm
    (6.1 x 4.6 x 4.8 in)
    120 x 67 x 59 mm
    (4.7 x 2.6 x 2.3 in)
    Camera Weight 1550 g (54.7 oz) 396 g (14.0 oz)

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