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Panasonic GH4 vs Pentax 645Z

The Panasonic Lumix DMC-GH4 and the Pentax 645Z are two digital cameras that were officially introduced, respectively, in February 2014 and April 2014. The GH4 is a mirrorless interchangeable lens camera, while the 645Z is a DSLR. The cameras are based on a Four Thirds (GH4) and a medium format (645Z) sensor. The Panasonic has a resolution of 15.9 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
Panasonic GH4 VS Pentax 645Z
Panasonic GH4 Pentax 645Z
Mirrorless system camera Digital single lens reflex
Micro Four Thirds lenses Pentax 645 mount lenses
15.9 MP, Four Thirds Sensor 51.1 MP, Medium Format Sensor
4K/30p Video 1080/60i Video
ISO 200-25600 ISO 100-204800
Electronic viewfinder (2359k dots) Optical viewfinder
3.0" LCD, 1036k dots 3.2" LCD, 1037k dots
Swivel touchscreen Tilting screen (not touch-sensitive)
12 shutter flaps per second 3 shutter flaps per second
Weathersealed bodyWeathersealed body
500 shots per battery charge650 shots per battery charge
133 x 93 x 84 mm, 560 g 156 x 117 x 123 mm, 1550 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Panasonic Lumix DMC-GH4 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.

Body comparison

The physical size and weight of the Panasonic GH4 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 Panasonic GH4 vs Pentax 645Z
Compare GH4 versus 645Z top
Comparison GH4 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 considerably larger (48 percent) than the Panasonic GH4. Moreover, the 645Z is substantially heavier (177 percent) than the GH4. 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 GH4 gets 500 shots out of its DMW-BLF19 battery, while the 645Z can take 650 images on a single charge of its D-LI90 power pack.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. In case you want to display and compare another camera duo, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Camera
Model
 
Panasonic GH4» 5.2 in 3.7 in 3.3 in 19.8 oz 500 Y Feb 2014 1,499iPanasonic GH4
 
Pentax 645Z« 6.1 in 4.6 in 4.8 in 54.7 oz 650 Y Apr 2014 8,499 iPentax 645Z
 
Canon 5DS« » 6.0 in 4.6 in 3.0 in 32.8 oz 700 Y Feb 2015 3,699 iCanon 5DS
 
Canon 5DS R« » 6.0 in 4.6 in 3.0 in 32.8 oz 700 Y Feb 2015 3,699 iCanon 5DS R
 
Hasselblad X1D« » 5.9 in 3.9 in 2.8 in 25.6 oz .. Y Jun 2016 8,995iHasselblad X1D
 
Leica SL« » 5.8 in 4.1 in 1.5 in 29.9 oz 400 Y Oct 2015 7,450iLeica SL
 
Olympus E-M5 II« » 4.9 in 3.3 in 1.8 in 16.5 oz 310 Y Feb 2015 1,099iOlympus E-M5 II
 
Olympus E-M1« » 5.1 in 3.7 in 2.5 in 17.5 oz 350 Y Sep 2013 1,399iOlympus E-M1
 
Panasonic GH5« » 5.5 in 3.9 in 3.4 in 25.6 oz 410 Y Jan 2017 1,999 iPanasonic GH5
 
Panasonic G85« » 5.0 in 3.5 in 2.9 in 17.8 oz 330 Y Sep 2016 899iPanasonic G85
 
Panasonic GX8« » 5.2 in 3.1 in 2.5 in 17.2 oz 330 Y Jul 2015 1,199iPanasonic GX8
 
Panasonic GM5« » 3.9 in 2.4 in 1.4 in 7.4 oz 220 n Sep 2014 749iPanasonic GM5
 
Panasonic G6« » 4.8 in 3.3 in 2.8 in 13.8 oz 340 n Apr 2013 599iPanasonic G6
 
Panasonic GM1« » 3.9 in 2.2 in 1.2 in 7.2 oz 230 n Oct 2013 749iPanasonic GM1
 
Panasonic GH3« » 5.2 in 3.7 in 3.2 in 19.4 oz 540 Y Sep 2012 1,299iPanasonic GH3
 
Pentax 645D« » 6.1 in 4.6 in 4.7 in 52.2 oz 800 Y Mar 2010 9,995iPentax 645D
 
Sony A7« » 5.0 in 3.7 in 1.9 in 16.7 oz 340 Y Oct 2013 1,699iSony A7
Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.

Any camera decision will naturally be influenced heavily by the price. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The GH4 was launched at a markedly lower price (by 82 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.

 

Sensor comparison

The size of the sensor inside a digital camera is one of the key determinants of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Panasonic GH4 features a Four Thirds sensor and the Pentax 645Z a medium format sensor. The sensor area in the 645Z is 539 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 0.79. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.

Panasonic GH4 and Pentax 645Z sensor measures

With 51.1MP, the 645Z offers a higher resolution than the GH4 (15.9MP), but the 645Z nevertheless has larger individual pixels (pixel pitch of 5.30μm versus 3.76μm for the GH4) due to its larger sensor. It is noteworthy in this context that the two cameras were released in close succession, so that their sensors are from the same technological generation. 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 inch or 104.9 x 78.6 cm, for very good quality (250 dpi) 33 x 24.8 inch or 83.9 x 62.9 cm, and for excellent quality (300 dpi) 27.5 x 20.6 inch or 69.9 x 52.4 cm. The corresponding values for the Panasonic GH4 are 23 x 17.3 inch or 58.5 x 43.9 cm for good quality, 18.4 x 13.8 inch or 46.8 x 35.1 cm for very good quality, and 15.4 x 11.5 inch or 39 x 29.3 cm for excellent quality prints.

The Panasonic Lumix DMC-GH4 has a native sensitivity range from ISO 200 to ISO 25600, which can be extended to ISO 100-25600. The corresponding ISO settings for the Pentax 645Z are ISO 100 to ISO 204800 (no boost).

GH4 versus 645Z MP

For many cameras, data on sensor performance has been reported by DXO Mark. 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"). Of the two cameras under consideration, the 645Z offers substantially better image quality than the GH4 (overall score 27 points higher). The advantage is based on 2.8 bits higher color depth, 1.9 EV in additional dynamic range, and 2.5 stops in additional low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
 
Panasonic GH4 Four Thirds 15.9 4608 34564K/30p23.212.879174Panasonic GH4
 
Pentax 645Z Medium Format 51.1 8256 61921080/60i26.014.74505101Pentax 645Z
 
Canon 5DS Full Frame 50.3 8688 57921080/30p24.712.4238187Canon 5DS
 
Canon 5DS R Full Frame 50.3 8688 57921080/30p24.612.4230886Canon 5DS R
 
Hasselblad X1D Medium Format 51.3 8272 62001080/25p26.214.84489102Hasselblad X1D
 
Leica SL Full Frame 24.0 6000 40004K/30p25.013.4182188Leica SL
 
Olympus E-M5 II Four Thirds 15.9 4608 34561080/60p23.012.584273Olympus E-M5 II
 
Olympus E-M1 Four Thirds 15.9 4608 34561080/30p23.012.775773Olympus E-M1
 
Panasonic GH5 Four Thirds 20.2 5184 38884K/60p23.913.080777Panasonic GH5
 
Panasonic G85 Four Thirds 15.8 4592 34484K/30p22.812.565671Panasonic G85
 
Panasonic GX8 Four Thirds 20.2 5184 38884K/30p23.512.680675Panasonic GX8
 
Panasonic GM5 Four Thirds 15.8 4592 34481080/60p22.111.772166Panasonic GM5
 
Panasonic G6 Four Thirds 15.9 4608 34561080/60p21.311.563961Panasonic G6
 
Panasonic GM1 Four Thirds 15.8 4592 34481080/60i22.311.766066Panasonic GM1
 
Panasonic GH3 Four Thirds 15.9 4608 34561080/60p22.712.481271Panasonic GH3
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282Pentax 645D
 
Sony A7 Full Frame 24.0 6000 40001080/60p24.814.2224890Sony A7

Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the GH4 provides a higher video resolution than the 645Z. It can shoot video footage at 4K/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 GH4 has an electronic viewfinder (2359k 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 GH4 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 0.67x), 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 Panasonic GH4 and Pentax 645Z along with similar information for a selection of comparators.

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
Camera
Model
 
Panasonic GH42359 n 3.0 1036 swivel Y 1/8000s 12.0 Y n Panasonic GH4
 
Pentax 645Zoptical Y 3.2 1037 tilting n 1/4000s 3.0 n n Pentax 645Z
 
Canon 5DSoptical Y 3.2 1040 fixed n 1/8000s 5.0 n n Canon 5DS
 
Canon 5DS Roptical Y 3.2 1040 fixed n 1/8000s 5.0 n n Canon 5DS R
 
Hasselblad X1D2360 n 3.0 920 fixed Y 1/2000s 2.3 n n Hasselblad X1D
 
Leica SL4400 Y 3.0 1040 fixed Y 1/8000s 11.0 n n Leica SL
 
Olympus E-M5 II2360 n 3.0 1037 swivel Y 1/8000s 10.0 n Y Olympus E-M5 II
 
Olympus E-M12360 n 3.0 1037 tilting Y 1/8000s 10.0 n Y Olympus E-M1
 
Panasonic GH53680 n 3.2 1620 swivel Y 1/8000s 12.0 n Y Panasonic GH5
 
Panasonic G852360 n 3.0 1040 swivel Y 1/4000s 9.0 Y Y Panasonic G85
 
Panasonic GX82360 n 3.0 1040 swivel Y 1/8000s 10.0 n Y Panasonic GX8
 
Panasonic GM51166 n 3.0 921 fixed Y 1/500s 5.8 n n Panasonic GM5
 
Panasonic G61440 n 3.0 1036 swivel Y 1/4000s 7.0 Y n Panasonic G6
 
Panasonic GM1none n 3.0 1036 fixed Y 1/500s 5.0 Y n Panasonic GM1
 
Panasonic GH31746 n 3.0 614 swivel Y 1/4000s 6.0 Y n Panasonic GH3
 
Pentax 645Doptical Y 3.0 921 fixed n 1/4000s 1.1 n n Pentax 645D
 
Sony A72400 n 3.0 1230 tilting n 1/8000s 5.0 n n Sony A7

One difference between the cameras concerns the presence of an on-board flash. The GH4 has one, while the 645Z does not. While the built-in flash of the GH4 is not very powerful, it can at times be useful as a fill-in light.

The GH4 has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping 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 GH4 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 Panasonic GH4 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.

Concerning the storage of imaging data, both the GH4 and the 645Z write their files to SDXC cards. The 645Z features dual card slots, which can be very useful in case a memory card fails. In contrast, the GH4 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.

 

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 Panasonic Lumix DMC-GH4 and Pentax 645Z 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
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
 
Panasonic GH4YstereomonoYYmicro2.0YY-Panasonic GH4
 
Pentax 645ZYstereomonoY-mini3.0---Pentax 645Z
 
Canon 5DSYmonomonoY-mini3.0---Canon 5DS
 
Canon 5DS RYmonomonoY-mini3.0---Canon 5DS R
 
Hasselblad X1DYstereomonoYYmini3.0Y--Hasselblad X1D
 
Leica SLYstereomonoYYfull3.0Y--Leica SL
 
Olympus E-M5 IIYstereomonoY-micro2.0Y--Olympus E-M5 II
 
Olympus E-M1YstereomonoY-micro2.0Y--Olympus E-M1
 
Panasonic GH5YstereomonoYYfull3.1Y-YPanasonic GH5
 
Panasonic G85YstereomonoY-micro2.0Y--Panasonic G85
 
Panasonic GX8YstereomonoY-micro2.0YY-Panasonic GX8
 
Panasonic GM5Ystereomono--micro2.0Y--Panasonic GM5
 
Panasonic G6YstereomonoY-mini2.0YY-Panasonic G6
 
Panasonic GM1-stereomono--micro2.0Y--Panasonic GM1
 
Panasonic GH3YstereomonoYYmini2.0Y--Panasonic GH3
 
Pentax 645DYstereonone--none2.0---Pentax 645D
 
Sony A7YstereomonoYYmicro2.0YY-Sony A7

It is notable that the GH4 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.

Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.

The 645Z is a recent model that features in the current product line-up of Pentax. In contrast, the GH4 has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the GH4 was succeeded by the Panasonic GH5. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Panasonic and Pentax websites.

Review summary

So how do things add up? Which of the two cameras – the Panasonic GH4 or the Pentax 645Z – 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.

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Advantages of the Panasonic Lumix DMC-GH4:

  • 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 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 flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (12 vs 3 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More compact: Is smaller (133x93mm vs 156x117mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 990g or 64 percent) and hence easier to carry around.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • 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.
  • More affordable: Was introduced into a lower priced category (82 percent cheaper at launch).

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Arguments in favor of the Pentax 645Z:

  • More detail: Has more megapixels (51.1 vs 15.9MP), which boosts linear resolution by 79%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores substantially higher (27 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (2.8 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (1.9 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (2.5 stops ISO advantage).
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.67x).
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
  • Longer lasting: Gets more shots (650 versus 500) out of a single battery charge.
  • Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.

If the number of relative strengths (bullet points above) is taken as a guide, the GH4 is the clear winner of the match-up (18 : 13 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 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.

GH4 18:13 645Z

How about other alternatives? Do the specifications of the Panasonic GH4 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 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 GH4 or the 645Z perform in practice. 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 where reviews by experts come in. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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.

Review Scores
  Camera
Model
cam
era
  labs  
dp
re
  view  
e
photo
  zine  
ima
ging
resource
photo
graphy
  blog  
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Camera
Model
 
Panasonic GH4+ +85/1005/55/55/5 Feb 2014 1,499iPanasonic GH4
 
Pentax 645Z....4.5/55/55/5 Apr 2014 8,499 iPentax 645Z
 
Canon 5DS+83/1004.5/55/54.5/5 Feb 2015 3,699 iCanon 5DS
 
Canon 5DS R+83/1005/55/54.5/5 Feb 2015 3,699 iCanon 5DS R
 
Hasselblad X1Do81/100....4/5 Jun 2016 8,995iHasselblad X1D
 
Leica SL..84/1004.5/54/54/5 Oct 2015 7,450iLeica SL
 
Olympus E-M5 II+ +81/1005/54.5/55/5 Feb 2015 1,099iOlympus E-M5 II
 
Olympus E-M1+ +84/1004.5/54.5/54.5/5 Sep 2013 1,399iOlympus E-M1
 
Panasonic GH5+ +85/1004.5/55/55/5 Jan 2017 1,999 iPanasonic GH5
 
Panasonic G85+ +84/1005/54.5/54.5/5 Sep 2016 899iPanasonic G85
 
Panasonic GX8+82/1004.5/55/54.5/5 Jul 2015 1,199iPanasonic GX8
 
Panasonic GM5+77/1005/55/54.5/5 Sep 2014 749iPanasonic GM5
 
Panasonic G6+ +..5/5..4.5/5 Apr 2013 599iPanasonic G6
 
Panasonic GM1+78/1005/54.5/54.5/5 Oct 2013 749iPanasonic GM1
 
Panasonic GH3+ +79/1004.5/55/54.5/5 Sep 2012 1,299iPanasonic GH3
 
Pentax 645D......4.5/5.. Mar 2010 9,995iPentax 645D
 
Sony A7+ +80/1005/54.5/55/5 Oct 2013 1,699iSony A7
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. 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, please note that some of the review sites have changed their methodology and reporting over time.

Panasonic GH4:
Check Ebay offers
Pentax 645Z:
Check Amazon price

Other camera comparisons

Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make a corresponding selection in the search boxes 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: Panasonic GH4 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 Panasonic GH4 Pentax 645Z
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Micro Four Thirds lenses Pentax 645 mount lenses
    Launch Date February 2014 April 2014
    Launch Price USD 1499 USD 8499
    Sensor Specs Panasonic GH4 Pentax 645Z
    Sensor Technology CMOS CMOS
    Sensor Format Four Thirds Sensor Medium Format Sensor
    Sensor Size 17.3 x 13.0 mm 43.8 x 32.8 mm
    Sensor Area 224.9 mm2 1436.64 mm2
    Sensor Diagonal 21.6 mm 54.7 mm
    Crop Factor 2.0x 0.79x
    Sensor Resolution 15.9 Megapixels 51.1 Megapixels
    Image Resolution 4608 x 3456 pixels 8256 x 6192 pixels
    Pixel Pitch 3.76 μm 5.30 μm
    Pixel Density 7.08 MP/cm2 3.56 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 4K/30p Video 1080/60i Video
    ISO Setting 200-25600 ISO 100-204800 ISO
    ISO Boost 100-25600 ISO no Enhancement
    Image Processor Venus IX PRIME III
    DXO Sensor Quality (score) 74 101
    DXO Color Depth (bits) 23.2 26.0
    DXO Dynamic Range (EV) 12.8 14.7
    DXO Low Light (ISO) 791 4505
    Screen Specs Panasonic GH4 Pentax 645Z
    Viewfinder Type Electronic viewfinder Optical viewfinder
    Viewfinder Field of View 100% 98%
    Viewfinder Magnification 0.67x 0.78x
    Viewfinder Resolution 2359k dots
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.0 inch 3.2 inch
    LCD Resolution 1036k dots 1037k dots
    LCD Attachment Swivel screen Tilting screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Panasonic GH4 Pentax 645Z
    Focus System Contrast-detect AF Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000/s 1/4000/s
    Continuous Shooting 12 shutter flaps/s 3 shutter flaps/s
    Shutter Life Expectancy200 000 actuations100 000 actuations
    Electronic Shutterup to 1/8000sno E-Shutter
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Fill Flash Build-in Flash no On-Board Flash
    Storage Medium SDXC cards SDXC cards
    Second Storage Option Single card slot Dual card slots
    UHS card support UHS-I UHS-I
    Connectivity Specs Panasonic GH4 Pentax 645Z
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket PC Sync socket
    USB Connector USB 2.0 USB 3.0
    HDMI Port micro 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
    Near-Field Communication NFC built-in no NFC
    Body Specs Panasonic GH4 Pentax 645Z
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type DMW-BLF19 D-LI90
    Battery Life (CIPA)500 shots per charge650 shots per charge
    Body Dimensions 133 x 93 x 84 mm
    (5.2 x 3.7 x 3.3 in)
    156 x 117 x 123 mm
    (6.1 x 4.6 x 4.8 in)
    Camera Weight 560 g (19.8 oz) 1550 g (54.7 oz)

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