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Pentax 645D vs Panasonic GX800

The Pentax 645D and the Panasonic Lumix DMC-GX800 (labelled Panasonic GX850 in some countries) are two digital cameras that were revealed to the public, respectively, in March 2010 and January 2017. The 645D is a DSLR, while the GX800 is a mirrorless interchangeable lens camera. The cameras are based on a medium format (645D) and a Four Thirds (GX800) sensor. The Pentax has a resolution of 39.5 megapixels, whereas the Panasonic provides 15.8 MP.

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

Headline Specifications
Pentax 645D
versus
Panasonic GX800
Pentax 645D   Panasonic GX800
Digital single lens reflex Mirrorless system camera
Pentax 645 mount lenses Micro Four Thirds lenses
39.5 MP – Medium Format sensor 15.8 MP – Four Thirds sensor
no Video 4K/30p Video
ISO 100-1,600 ISO 200-25,600
Optical viewfinder No viewfinder, LCD framing
3.0" LCD – 921k dots 3.0" LCD – 1040k dots
Fixed screen (not touch-sensitive) Tilting touchscreen
1.1 shutter flaps per second 10 shutter flaps per second
Weathersealed bodynot weather sealed
800 shots per battery charge210 shots per battery charge
156 x 117 x 119 mm, 1480 g 107 x 65 x 33 mm, 269 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Pentax 645D and the Panasonic Lumix DMC-GX800? 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

An illustration of the physical size and weight of the Pentax 645D and the Panasonic GX800 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 measures are rounded to the nearest millimeter.

The GX800 can be obtained in three different colors (black, silver, red), while the 645D is only available in black.

Size Pentax 645D vs Panasonic GX800
Compare 645D versus GX800 top
Comparison 645D or GX800 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic GX800 is considerably smaller (62 percent) than the Pentax 645D. Moreover, the GX800 is substantially lighter (82 percent) than the 645D. It is worth mentioning in this context that the 645D is splash and dust resistant, while the GX800 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 645D gets 800 shots out of its Pentax D-LI90 battery, while the GX800 can take 210 images on a single charge of its Panasonic DMW-BLH7 power pack.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

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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 (USD)
Street
Price
1.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 9,995ebay.com
2.
 
Panasonic GX800 107 mm 65 mm 33 mm 269 g 210 n Jan 2017 549ebay.com
3.
 
Canon 1D Mark IV 156 mm 157 mm 80 mm 1230 g 1500 Y Oct 2009 4,999ebay.com
4.
 
Canon 1D X 158 mm 168 mm 83 mm 1551 g 1120 Y Oct 2011 6,799ebay.com
5.
 
Canon 1D X Mark II 158 mm 168 mm 83 mm 1530 g 1210 Y Feb 2016 5,999ebay.com
6.
 
Leica S Typ 006 160 mm 120 mm 80 mm 1260 g .. Y Sep 2012 21,950ebay.com
7.
 
Nikon D3S 160 mm 157 mm 88 mm 1240 g 4200 Y Oct 2009 5,199ebay.com
8.
 
Nikon D5 160 mm 159 mm 92 mm 1415 g 3780 Y Jan 2016 6,499ebay.com
9.
 
Nikon D810 146 mm 123 mm 82 mm 980 g 1200 Y Jun 2014 3,299ebay.com
10.
 
Nikon D850 146 mm 124 mm 79 mm 1005 g 1840 Y Jul 2017 3,299 amazon.com
11.
 
Panasonic G5 120 mm 83 mm 71 mm 396 g 320 n Jul 2012 599ebay.com
12.
 
Panasonic G6 122 mm 85 mm 71 mm 390 g 340 n Apr 2013 599ebay.com
13.
 
Panasonic GF5 108 mm 67 mm 37 mm 267 g 360 n Apr 2012 499ebay.com
14.
 
Panasonic GF6 111 mm 65 mm 38 mm 323 g 340 n Apr 2013 499ebay.com
15.
 
Panasonic GF7 107 mm 65 mm 33 mm 266 g 230 n Jan 2015 499ebay.com
16.
 
Pentax 645Z 156 mm 117 mm 123 mm 1550 g 650 Y Apr 2014 8,499ebay.com
17.
 
Sony A7R 127 mm 94 mm 48 mm 465 g 340 Y Oct 2013 2,299ebay.com
Note: 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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The GX800 was launched at a markedly lower price (by 95 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. 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 imaging sensor is a crucial determinant 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 tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Pentax 645D features a medium format sensor and the Panasonic GX800 a Four Thirds sensor. The sensor area in the GX800 is 85 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 0.79 and 2.0. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.

Pentax 645D and Panasonic GX800 sensor measures

With 39.5MP, the 645D offers a higher resolution than the GX800 (15.8MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 3.77μm for the GX800) due to its larger sensor. However, the GX800 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 further enhance the light gathering capacity of its pixels. 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 inches or 92.3 x 69.1 cm, for very good quality (250 dpi) 29.1 x 21.8 inches or 73.8 x 55.3 cm, and for excellent quality (300 dpi) 24.2 x 18.1 inches or 61.5 x 46.1 cm. The corresponding values for the Panasonic GX800 are 23 x 17.2 inches or 58.3 x 43.8 cm for good quality, 18.4 x 13.8 inches or 46.7 x 35 cm for very good quality, and 15.3 x 11.5 inches or 38.9 x 29.2 cm for excellent quality prints.

The Pentax 645D has a native sensitivity range from ISO 100 to ISO 1600. The corresponding ISO settings for the Panasonic Lumix DMC-GX800 are ISO 200 to ISO 25600, with the possibility to increase the ISO range to 100-25600.

In terms of underlying technology, the 645D is build around a CCD sensor, while the GX800 uses a CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

645D versus GX800 MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). Of the two cameras under review, the 645D has a notably higher overall DXO score than the GX800 (overall score 9 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 1.4 bits higher color depth, 0.7 EV of lower dynamic range, and 1.1 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.

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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.
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282
2.
 
Panasonic GX800 Four Thirds 15.8 4592 34484K/30p23.213.358673
3.
 
Canon 1D Mark IV APS-H 16.0 4896 32641080/30p22.812.0132074
4.
 
Canon 1D X Full Frame 17.9 5184 34561080/30p23.811.8278682
5.
 
Canon 1D X Mark II Full Frame 20.0 5472 36484K/60p24.113.5320788
6.
 
Leica S Typ 006 Medium Format 37.5 7500 5000none23.912.282476
7.
 
Nikon D3S Full Frame 12.1 4256 2832720/24p23.512.0325382
8.
 
Nikon D5 Full Frame 20.7 5588 37124K/30p25.112.3234388
9.
 
Nikon D810 Full Frame 36.2 7360 49121080/60p25.714.8285397
10.
 
Nikon D850 Full Frame 45.4 8256 55044K/30p26.414.82660100
11.
 
Panasonic G5 Four Thirds 15.9 4608 34561080/60p21.411.661861
12.
 
Panasonic G6 Four Thirds 15.9 4608 34561080/60p21.311.563961
13.
 
Panasonic GF5 Four Thirds 12.0 4000 30001080/60i20.510.057350
14.
 
Panasonic GF6 Four Thirds 15.8 4592 34481080/60i20.710.662254
15.
 
Panasonic GF7 Four Thirds 15.8 4592 34481080/60p22.712.387470
16.
 
Pentax 645Z Medium Format 51.1 8256 61921080/60i26.014.74505101
17.
 
Sony A7R Full Frame 36.2 7360 49121080/60p25.614.1274695
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. The GX800 indeed provides for movie recording, while the 645D does not. The highest resolution format that the GX800 can use is 4K/30p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the 645D has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the GX800 relies on live view and the rear LCD for framing. The following table reports on some other key feature differences and similarities of the Pentax 645D, the Panasonic GX800, and comparable cameras.

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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.
 
Pentax 645Doptical Y3.0 / 921 fixed n 1/4000s 1.1/s n n
2.
 
Panasonic GX800none n3.0 / 1040 tilting Y 1/500s 10.0/s Y n
3.
 
Canon 1D Mark IVoptical Y3.0 / 920 fixed n 1/8000s 10.0/s n n
4.
 
Canon 1D Xoptical Y3.2 / 1040 fixed n 1/8000s 14.0/s n n
5.
 
Canon 1D X Mark IIoptical Y3.2 / 1620 fixed Y 1/8000s 16.0/s n n
6.
 
Leica S Typ 006optical Y3.0 / 922 fixed n 1/4000s 1.5/s n n
7.
 
Nikon D3Soptical Y3.0 / 921 fixed n 1/8000s 11.0/s n n
8.
 
Nikon D5optical Y3.2 / 2359 fixed Y 1/8000s 14.0/s n n
9.
 
Nikon D810optical Y3.2 / 1229 fixed n 1/8000s 5.0/s Y n
10.
 
Nikon D850optical Y3.2 / 2359 tilting Y 1/8000s 9.0/s n n
11.
 
Panasonic G51440 n3.0 / 920 swivel Y 1/4000s 6.0/s Y n
12.
 
Panasonic G61440 n3.0 / 1036 swivel Y 1/4000s 7.0/s Y n
13.
 
Panasonic GF5none n3.0 / 920 fixed Y 1/4000s 4.0/s Y n
14.
 
Panasonic GF6none n3.0 / 1040 tilting Y 1/4000s 4.2/s Y n
15.
 
Panasonic GF7none n3.0 / 1040 tilting Y 1/500s 5.8/s Y n
16.
 
Pentax 645Zoptical Y3.2 / 1037 tilting n 1/4000s 3.0/s n n
17.
 
Sony A7R2400 n3.0 / 1230 tilting n 1/8000s 4.0/s n n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One feature that is present on the 645D, but is missing on the GX800 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 GX800 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 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 GX800 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 645D and the Panasonic GX800 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 645D and the GX800 write their files to SDXC cards. The 645D features dual card slots, which can be very useful in case a memory card fails. In contrast, the GX800 only has one slot. The GX800 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the 645D cannot take advantage of Ultra High Speed SD cards.

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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 645D and Panasonic Lumix DMC-GX800 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.
 
Pentax 645DYstereo / ----2.0---
2.
 
Panasonic GX800-stereo / mono--micro2.0Y--
3.
 
Canon 1D Mark IVYstereo / -Y-mini2.0---
4.
 
Canon 1D XYmono / -Y-mini2.0---
5.
 
Canon 1D X Mark IIYmono / monoYYmini3.0---
6.
 
Leica S Typ 006Y- / ---mini2.0---
7.
 
Nikon D3SYstereo / ---mini2.0---
8.
 
Nikon D5Ystereo / monoYYmini3.0---
9.
 
Nikon D810Ystereo / monoYYmini3.0Y--
10.
 
Nikon D850Ystereo / monoYYmini3.0YYY
11.
 
Panasonic G5Ystereo / mono--mini2.0---
12.
 
Panasonic G6Ystereo / monoY-mini2.0YY-
13.
 
Panasonic GF5-stereo / mono--mini2.0---
14.
 
Panasonic GF6-stereo / mono--mini2.0YY-
15.
 
Panasonic GF7-stereo / mono--micro2.0YY-
16.
 
Pentax 645ZYstereo / monoY-mini3.0---
17.
 
Sony A7RYstereo / monoYYmicro2.0YY-

It is notable that the 645D has a hotshoe, while the GX800 does not. This socket makes it possible to easily attach optional accessories, such as an external flash gun.

Studio photographers will appreciate that the Pentax 645D (unlike the GX800) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the 645D and the GX800 have been discontinued, but can regularly be found used on ebay. The 645D was replaced by the Pentax 645Z, while the GX800 does not have a direct successor. Further information on the features and operation of the 645D and GX800 can be found, respectively, in the Pentax 645D Manual (free pdf) or the online Panasonic GX800 Manual.

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Review summary

So how do things add up? Which of the two cameras – the Pentax 645D or the Panasonic GX800 – 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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Arguments in favor of the Pentax 645D:

  • More detail: Offers more megapixels (39.5 vs 15.8MP) with a 58% higher linear resolution.
  • Better image quality: Scores markedly higher (9 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (1.4 bits more color depth).
  • Better low-light sensitivity: Requires less light for good images (1.1 stops ISO advantage).
  • Easier framing: Has an optical viewfinder for image composition and settings control.
  • Easier setting verification: Features an LCD display on top to control shooting parameters.
  • Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/500s) to freeze action.
  • Longer lasting: Can take more shots (800 versus 210) on a single battery charge.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
  • 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 March 2010).

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Advantages of the Panasonic Lumix DMC-GX800:

  • More dynamic range: Captures a broader range of light and dark details (0.7 EV of extra DR).
  • Broader imaging potential: Can capture not only stills but also 4K/30p video.
  • More detailed LCD: Has a higher resolution rear screen (1040k vs 921k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • 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 (10 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 (107x65mm vs 156x117mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 1211g or 82 percent) and is thus easier to take along.
  • 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.
  • Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
  • More affordable: Was introduced into a lower priced category (95 percent cheaper at launch).
  • More modern: Reflects 6 years and 9 months of technical progress since the 645D launch.

If the number of relative strengths (bullet points above) is taken as a guide, the GX800 emerges as the winner of the match-up (16 : 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 wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

645D 13:16 GX800

How about other alternatives? Do the specifications of the Pentax 645D and the Panasonic GX800 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 645D and the GX800 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 table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

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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 (USD)
Street
Price
1.
 
Pentax 645D5/5.......... Mar 2010 9,995ebay.com
2.
 
Panasonic GX800..+..76/1004.5/54.5/5 Jan 2017 549ebay.com
3.
 
Canon 1D Mark IV5/5....89/100.... Oct 2009 4,999ebay.com
4.
 
Canon 1D X5/5......4.5/54.5/5 Oct 2011 6,799ebay.com
5.
 
Canon 1D X Mark II....4.5/589/1004.5/54.5/5 Feb 2016 5,999ebay.com
6.
 
Leica S Typ 006............ Sep 2012 21,950ebay.com
7.
 
Nikon D3S5/5....89/1004.5/55/5 Oct 2009 5,199ebay.com
8.
 
Nikon D5....4/589/1004.5/55/5 Jan 2016 6,499ebay.com
9.
 
Nikon D8105/5..5/586/1005/54.5/5 Jun 2014 3,299ebay.com
10.
 
Nikon D8504.5/5+ +5/589/1004.5/55/5 Jul 2017 3,299 amazon.com
11.
 
Panasonic G53/5+ +....4.5/54.5/5 Jul 2012 599ebay.com
12.
 
Panasonic G64/5+ +....5/54.5/5 Apr 2013 599ebay.com
13.
 
Panasonic GF53/5......4.5/54.5/5 Apr 2012 499ebay.com
14.
 
Panasonic GF6..+ +....4.5/54.5/5 Apr 2013 499ebay.com
15.
 
Panasonic GF74/5+....4.5/54.5/5 Jan 2015 499ebay.com
16.
 
Pentax 645Z5/5..3.5/5..4.5/55/5 Apr 2014 8,499ebay.com
17.
 
Sony A7R5/5+ +..82/1004.5/55/5 Oct 2013 2,299ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, 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 comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

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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 make your choice using the following search menu. 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 645D vs Panasonic GX800

    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 645D Panasonic GX800
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Pentax 645 mount lenses Micro Four Thirds lenses
    Launch Date March 2010 January 2017
    Launch Price USD 9,995 USD 549
    Sensor Specs Pentax 645D Panasonic GX800
    Sensor Technology CCD CMOS
    Sensor Format Medium Format Sensor Four Thirds Sensor
    Sensor Size 44.0 x 33.0 mm 17.3 x 13.0 mm
    Sensor Area 1452 mm2 224.9 mm2
    Sensor Diagonal 55 mm 21.6 mm
    Crop Factor 0.79x 2.0x
    Sensor Resolution 39.5 Megapixels 15.8 Megapixels
    Image Resolution 7264 x 5440 pixels 4592 x 3448 pixels
    Pixel Pitch 6.06 μm 3.77 μm
    Pixel Density 2.72 MP/cm2 7.04 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability no Video 4K/30p Video
    ISO Setting 100 - 1,600 ISO 200 - 25,600 ISO
    ISO Boost no Enhancement 100 - 25,600 ISO
    Image Processor PRIME II Venus
    DXO Sensor Quality (score) 82 73
    DXO Color Depth (bits) 24.6 23.2
    DXO Dynamic Range (EV) 12.6 13.3
    DXO Low Light (ISO) 1262 586
    Screen Specs Pentax 645D Panasonic GX800
    Viewfinder Type Optical viewfinder no viewfinder
    Viewfinder Field of View 98%
    Viewfinder Magnification 0.78x
    Top-Level Screen Control Panel no Top Display
    LCD Framing Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 921k dots 1040k dots
    LCD Attachment Fixed screen Tilting screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Pentax 645D Panasonic GX800
    Focus System Phase-detect AF Contrast-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/500s
    Continuous Shooting 1.1 shutter flaps/s 10 shutter flaps/s
    Electronic Shutterno E-Shutterup to 1/16000s
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Fill Flash no On-Board Flash Built-in Flash
    Storage Medium SDXC cards SDXC cards
    Single or Dual Card Slots Dual card slots Single card slot
    UHS card support no UHS-I
    Connectivity Specs Pentax 645D Panasonic GX800
    External Flash Hotshoe no Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 2.0 USB 2.0
    HDMI Port no HDMI micro HDMI
    Wifi Support no Wifi Wifi built-in
    Body Specs Pentax 645D Panasonic GX800
    Environmental SealingWeathersealed bodynot weather sealed
    Battery Type Pentax D-LI90 Panasonic DMW-BLH7
    Battery Life (CIPA)800 shots per charge210 shots per charge
    Body Dimensions 156 x 117 x 119 mm
    (6.1 x 4.6 x 4.7 in)
    107 x 65 x 33 mm
    (4.2 x 2.6 x 1.3 in)
    Camera Weight 1480 g (52.2 oz) 269 g (9.5 oz)
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