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Panasonic GH5 vs Pentax 645D

The Panasonic Lumix DC-GH5 and the Pentax 645D are two digital cameras that were revealed to the public, respectively, in January 2017 and March 2010. The GH5 is a mirrorless interchangeable lens camera, while the 645D is a DSLR. The cameras are based on a Four Thirds (GH5) and a medium format (645D) sensor. The Panasonic has a resolution of 20.2 megapixels, whereas the Pentax provides 39.5 MP.

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

Headline Specifications
Panasonic GH5 VS Pentax 645D
Panasonic GH5 Pentax 645D
Mirrorless system camera Digital single lens reflex
Micro Four Thirds lenses Pentax 645 mount lenses
20.2 MP, Four Thirds Sensor 39.5 MP, Medium Format Sensor
4K/60p Video no Video
ISO 200-25600 ISO 100-1600
Electronic viewfinder (3680k dots) Optical viewfinder
3.2" LCD, 1620k dots 3.0" LCD, 921k dots
Swivel touchscreen Fixed screen (not touch-sensitive)
12 shutter flaps per second 1.1 shutter flaps per second
In-body stabilizationLens stabilization only
Weathersealed bodyWeathersealed body
410 shots per battery charge800 shots per battery charge
139 x 98 x 87 mm, 725 g 156 x 117 x 119 mm, 1480 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Panasonic Lumix DC-GH5 and the Pentax 645D? 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 side-by-side display below illustrates the physical size and weight of the Panasonic GH5 and the Pentax 645D. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth measures are rounded to the nearest millimeter.

Size Panasonic GH5 vs Pentax 645D
Compare GH5 versus 645D top
Comparison GH5 or 645D rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax 645D is notably larger (34 percent) than the Panasonic GH5. Moreover, the 645D is substantially heavier (104 percent) than the GH5. 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 GH5 gets 410 shots out of its DMW-BLF19 battery, while the 645D can take 800 images on a single charge of its D-LI90 power pack.

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, just use the right or left arrows in the table to switch to the respective camera. Alternatively, you can also navigate to the CAM-parator app and make your selection from the full list of cameras there.

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 GH5» 5.5 in 3.9 in 3.4 in 25.6 oz 410 Y Jan 2017 1,999 iPanasonic GH5
 
Pentax 645D« 6.1 in 4.6 in 4.7 in 52.2 oz 800 Y Mar 2010 9,995iPentax 645D
 
Canon 1D X« » 6.2 in 6.6 in 3.3 in 54.7 oz 1120 Y Oct 2011 6,799iCanon 1D X
 
Canon 1D Mark IV« » 6.1 in 6.2 in 3.1 in 43.4 oz 1500 Y Oct 2009 4,999iCanon 1D Mark IV
 
Fujifilm X-H1« » 5.5 in 3.8 in 3.4 in 23.7 oz 310 Y Feb 2018 1,899 iFujifilm X-H1
 
Leica S Typ 006« » 6.3 in 4.7 in 3.1 in 44.4 oz .. Y Sep 2012 21,950iLeica S Typ 006
 
Nikon D500« » 5.8 in 4.5 in 3.2 in 30.3 oz 1240 Y Jan 2016 1,999 iNikon D500
 
Nikon D3S« » 6.3 in 6.2 in 3.5 in 43.7 oz 4200 Y Oct 2009 5,199iNikon D3S
 
Olympus E-M1 II« » 5.3 in 3.6 in 2.6 in 20.2 oz 440 Y Sep 2016 1,999 iOlympus E-M1 II
 
Panasonic G9« » 5.4 in 3.8 in 3.6 in 23.2 oz 400 Y Nov 2017 1,699 iPanasonic G9
 
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 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
 
Sony A7 III« » 5.0 in 3.8 in 2.9 in 22.9 oz 610 Y Feb 2018 1,999 iSony A7 III
 
Sony A9« » 5.0 in 3.8 in 2.5 in 23.7 oz 650 Y Apr 2017 4,499iSony A9
 
Sony A7 II« » 5.0 in 3.8 in 2.4 in 21.1 oz 350 Y Nov 2014 1,999iSony A7 II
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 manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The GH5 was launched at a markedly lower price (by 80 percent) than the 645D, which puts it into a different market segment. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down.

 

Sensor comparison

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors of image quality. 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. 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Panasonic GH5 features a Four Thirds sensor and the Pentax 645D a medium format sensor. The sensor area in the 645D is 545 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 GH5 and Pentax 645D sensor measures

With 39.5MP, the 645D offers a higher resolution than the GH5 (20.2MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 3.34μm for the GH5) due to its larger sensor. However, the GH5 is a much more recent model (by 6 years and 9 months) than the 645D, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. 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 Pentax 645D implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 645D for good quality output (200 dots per inch) amounts to 36.3 x 27.2 inch or 92.3 x 69.1 cm, for very good quality (250 dpi) 29.1 x 21.8 inch or 73.8 x 55.3 cm, and for excellent quality (300 dpi) 24.2 x 18.1 inch or 61.5 x 46.1 cm. The corresponding values for the Panasonic GH5 are 25.9 x 19.4 inch or 65.8 x 49.4 cm for good quality, 20.7 x 15.6 inch or 52.7 x 39.5 cm for very good quality, and 17.3 x 13 inch or 43.9 x 32.9 cm for excellent quality prints.

The Panasonic Lumix DC-GH5 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 645D are ISO 100 to ISO 1600 (no boost).

GH5 versus 645D MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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"). Of the two cameras under consideration, the 645D has a markedly higher DXO score than the GH5 (overall score 5 points higher), which will translate into better image quality. The advantage is based on 0.7 bits higher color depth, 0.4 EV of lower dynamic range, and 0.6 stops in additional low light sensitivity. 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
Camera
Model
 
Panasonic GH5 Four Thirds 20.2 5184 38884K/60p23.913.080777Panasonic GH5
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282Pentax 645D
 
Canon 1D X Full Frame 17.9 5184 34561080/30p23.811.8278682Canon 1D X
 
Canon 1D Mark IV APS-H 16.0 4896 32641080/30p22.812.0132074Canon 1D Mark IV
 
Fujifilm X-H1 APS-C 24.0 6000 40004K/30p........Fujifilm X-H1
 
Leica S Typ 006 Medium Format 37.5 7500 5000none23.912.282476Leica S Typ 006
 
Nikon D500 APS-C 20.7 5568 37124K/30p24.014.0132483Nikon D500
 
Nikon D3S Full Frame 12.1 4256 2832720/24p23.512.0325382Nikon D3S
 
Olympus E-M1 II Four Thirds 20.2 5184 38884K/30p23.712.8131280Olympus E-M1 II
 
Panasonic G9 Four Thirds 20.2 5184 38884K/60p........Panasonic G9
 
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 GH4 Four Thirds 15.9 4608 34564K/30p23.212.879174Panasonic GH4
 
Pentax 645Z Medium Format 51.1 8256 61921080/60i26.014.74505101Pentax 645Z
 
Sony A7 III Full Frame 24.0 6000 40004K/30p25.014.7373096Sony A7 III
 
Sony A9 Full Frame 24.0 6000 40004K/30p24.913.3351792Sony A9
 
Sony A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990Sony A7 II

Many modern cameras are not only capable of taking still images, but also of capturing video footage. The GH5 indeed provides movie recording capabilities, while the 645D does not. The highest resolution format that the GH5 can use is 4K/60p.

 

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the GH5 has an electronic viewfinder (3680k dots), while the 645D 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 GH5 offers a wider field of view (100%) than the one in the 645D (98%), so that a larger proportion of the captured image is visible in the finder. On the other hand, the viewfinder of the 645D 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 table below summarizes some of the other core capabilities of the Panasonic GH5 and Pentax 645D 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
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 GH53680 n 3.2 1620 swivel Y 1/8000s 12.0 n Y Panasonic GH5
 
Pentax 645Doptical Y 3.0 921 fixed n 1/4000s 1.1 n n Pentax 645D
 
Canon 1D Xoptical Y 3.2 1040 fixed n 1/8000s 14.0 n n Canon 1D X
 
Canon 1D Mark IVoptical Y 3.0 920 fixed n 1/8000s 10.0 n n Canon 1D Mark IV
 
Fujifilm X-H13690 Y 3.0 1040 full-flex Y 1/8000s 14.0 n Y Fujifilm X-H1
 
Leica S Typ 006optical Y 3.0 922 fixed n 1/4000s 1.5 n n Leica S Typ 006
 
Nikon D500optical Y 3.2 2359 tilting Y 1/8000s 10.0 n n Nikon D500
 
Nikon D3Soptical Y 3.0 921 fixed n 1/8000s 11.0 n n Nikon D3S
 
Olympus E-M1 II2360 n 3.0 1037 swivel Y 1/8000s 18.0 n Y Olympus E-M1 II
 
Panasonic G93680 Y 3.0 1040 swivel Y 1/8000s 20.0 n Y Panasonic G9
 
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 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
 
Sony A7 III2359 n 3.0 922 tilting Y 1/8000s 10.0 n Y Sony A7 III
 
Sony A93686 n 3.0 1440 tilting Y 1/8000s 20.0 n Y Sony A9
 
Sony A7 II2400 n 3.0 1230 tilting n 1/8000s 5.0 n Y Sony A7 II

One feature that differentiates the GH5 and the 645D is in-body image stabilization (IBIS). The GH5 reduces the risk of handshake-induced blur with all attached lenses, while the 645D has to rely on optical image stabilization in OIS-equipped lenses to achieve the same effect.

The GH5 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 645D 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 GH5 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 GH5 and the Pentax 645D 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 GH5 and the 645D write their files to SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. The GH5 supports UHS-II cards (on both slots), while the 645D cannot take advantage of Ultra High Speed SD cards.

 

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 DC-GH5 and Pentax 645D 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 GH5YstereomonoYYfull3.1Y-YPanasonic GH5
 
Pentax 645DYstereonone--none2.0---Pentax 645D
 
Canon 1D XYmonononeY-mini2.0---Canon 1D X
 
Canon 1D Mark IVYstereononeY-mini2.0---Canon 1D Mark IV
 
Fujifilm X-H1YstereomonoY-micro3.0Y--Fujifilm X-H1
 
Leica S Typ 006Ynonenone--mini2.0---Leica S Typ 006
 
Nikon D500YstereomonoYYmini3.0YYYNikon D500
 
Nikon D3SYstereonone--mini2.0---Nikon D3S
 
Olympus E-M1 IIYstereomonoYYmicro3.0Y--Olympus E-M1 II
 
Panasonic G9YstereomonoYYfull3.0Y-YPanasonic G9
 
Panasonic G85YstereomonoY-micro2.0Y--Panasonic G85
 
Panasonic GX8YstereomonoY-micro2.0YY-Panasonic GX8
 
Panasonic GH4YstereomonoYYmicro2.0YY-Panasonic GH4
 
Pentax 645ZYstereomonoY-mini3.0---Pentax 645Z
 
Sony A7 IIIYstereomonoYYmicro3.1YYYSony A7 III
 
Sony A9YstereomonoYYmicro2.0YYYSony A9
 
Sony A7 IIYstereomonoYYmicro2.0YY-Sony A7 II

It is notable that the GH5 offers wifi support, while the 645D does not. Wifi can be a very convenient means to transfer image data to an off-camera location.

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

The GH5 is a recent model that features in the current product line-up of Panasonic. In contrast, the 645D has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the 645D was succeeded by the Pentax 645Z. 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 what is the bottom line? Which of the two cameras – the Panasonic GH5 or the Pentax 645D – 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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Advantages of the Panasonic Lumix DC-GH5:

  • Broader imaging potential: Can record not only still images but also 4K/60p movies.
  • 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%).
  • 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 (1620k vs 921k dots).
  • 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 1.1 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More compact: Is smaller (139x98mm vs 156x117mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 755g or 51 percent) and hence easier to carry around.
  • 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.
  • Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
  • 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 Ultra High Speed (UHS-II) SDXC cards on both slots.
  • More affordable: Was introduced into a lower priced category (80 percent cheaper at launch).
  • More modern: Reflects 6 years and 9 months of technical progress since the 645D launch.

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Reasons to prefer the Pentax 645D:

  • More detail: Has more megapixels (39.5 vs 20.2MP), which boosts linear resolution by 40%.
  • Better image quality: Scores markedly higher (5 points) in the DXO overall evaluation.
  • Better low-light sensitivity: Can shoot in dim conditions (0.6 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 0.76x).
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • Longer lasting: Gets more shots (800 versus 410) out of a single battery charge.
  • More heavily discounted: Has been around for much longer (launched in March 2010).

If the number of relative strengths (bullet points above) is taken as a guide, the GH5 is the clear winner of the match-up (21 : 8 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.

GH5 21:08 645D

How about other alternatives? Do the specifications of the Panasonic GH5 and the Pentax 645D 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 says little about, for example, the shooting experience and imaging performance of the GH5 and the 645D in practical situations. 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 where reviews by experts come in. The adjacent summary-table relays the overall verdicts of several of the most popular camera 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 GH5+ +85/1004.5/55/55/5 Jan 2017 1,999 iPanasonic GH5
 
Pentax 645D......4.5/5.. Mar 2010 9,995iPentax 645D
 
Canon 1D X....4.5/54.5/54.5/5 Oct 2011 6,799iCanon 1D X
 
Canon 1D Mark IV..89/100..5/5.. Oct 2009 4,999iCanon 1D Mark IV
 
Fujifilm X-H1+86/1004.5/5..4.5/5 Feb 2018 1,899 iFujifilm X-H1
 
Leica S Typ 006.......... Sep 2012 21,950iLeica S Typ 006
 
Nikon D500+ +91/1004.5/55/55/5 Jan 2016 1,999 iNikon D500
 
Nikon D3S..89/1004.5/55/55/5 Oct 2009 5,199iNikon D3S
 
Olympus E-M1 II+ +85/1004.5/55/54.5/5 Sep 2016 1,999 iOlympus E-M1 II
 
Panasonic G9+ +85/1005/55/55/5 Nov 2017 1,699 iPanasonic G9
 
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 GH4+ +85/1005/55/55/5 Feb 2014 1,499iPanasonic GH4
 
Pentax 645Z....4.5/55/55/5 Apr 2014 8,499 iPentax 645Z
 
Sony A7 III+ +89/1005/55/55/5 Feb 2018 1,999 iSony A7 III
 
Sony A9+ +89/1005/55/55/5 Apr 2017 4,499iSony A9
 
Sony A7 II+82/1004.5/55/55/5 Nov 2014 1,999iSony A7 II
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The ratings are only valid when referring to cameras in the same category and of the same age. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

Panasonic GH5:
Check Amazon price
Pentax 645D:
Check Ebay offers

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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Panasonic GH5 vs Pentax 645D

    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 GH5 Pentax 645D
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Micro Four Thirds lenses Pentax 645 mount lenses
    Launch Date January 2017 March 2010
    Launch Price USD 1999 USD 9995
    Sensor Specs Panasonic GH5 Pentax 645D
    Sensor Technology CMOS CCD
    Sensor Format Four Thirds Sensor Medium Format Sensor
    Sensor Size 17.3 x 13.0 mm 44.0 x 33.0 mm
    Sensor Area 224.9 mm2 1452 mm2
    Sensor Diagonal 21.6 mm 55 mm
    Crop Factor 2.0x 0.79x
    Sensor Resolution 20.2 Megapixels 39.5 Megapixels
    Image Resolution 5184 x 3888 pixels 7264 x 5440 pixels
    Pixel Pitch 3.34 μm 6.06 μm
    Pixel Density 8.96 MP/cm2 2.72 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability 4K/60p Video no Video
    ISO Setting 200-25600 ISO 100-1600 ISO
    ISO Boost 100-25600 ISO no Enhancement
    Image Processor Venus 10 PRIME II
    DXO Sensor Quality (score) 77 82
    DXO Color Depth (bits) 23.9 24.6
    DXO Dynamic Range (EV) 13.0 12.6
    DXO Low Light (ISO) 807 1262
    Screen Specs Panasonic GH5 Pentax 645D
    Viewfinder Type Electronic viewfinder Optical viewfinder
    Viewfinder Field of View 100% 98%
    Viewfinder Magnification 0.76x 0.78x
    Viewfinder Resolution 3680k dots
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View
    Rear LCD Size 3.2 inch 3.0 inch
    LCD Resolution 1620k dots 921k dots
    LCD Attachment Swivel screen Fixed screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Panasonic GH5 Pentax 645D
    Focus System Contrast-detect AF Phase-detect AF
    Manual Focusing AidFocus PeakingNo Peaking Feature
    Continuous Shooting 12 shutter flaps/s 1.1 shutter flaps/s
    Shutter Life Expectancy200 000 actuations50 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 SDXC cards SDXC cards
    Second Storage Option Dual card slots Dual card slots
    UHS card support Dual UHS-II no
    Connectivity Specs Panasonic GH5 Pentax 645D
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket PC Sync socket
    USB Connector USB 3.1 USB 2.0
    HDMI Port full HDMI no HDMI
    Microphone Port External MIC port no MIC socket
    Headphone Socket Headphone port no Headphone port
    Wifi Support Wifi built-in no Wifi
    Bluetooth Support Bluetooth built-in no Bluetooth
    Body Specs Panasonic GH5 Pentax 645D
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type DMW-BLF19 D-LI90
    Battery Life (CIPA)410 shots per charge800 shots per charge
    Body Dimensions 139 x 98 x 87 mm
    (5.5 x 3.9 x 3.4 in)
    156 x 117 x 119 mm
    (6.1 x 4.6 x 4.7 in)
    Camera Weight 725 g (25.6 oz) 1480 g (52.2 oz)

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