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Panasonic GM5 vs Pentax 645D

The Panasonic Lumix DMC-GM5 and the Pentax 645D are two digital cameras that were officially introduced, respectively, in September 2014 and March 2010. The GM5 is a mirrorless interchangeable lens camera, while the 645D is a DSLR. The cameras are based on a Four Thirds (GM5) and a medium format (645D) sensor. The Panasonic has a resolution of 15.8 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 GM5
versus
Pentax 645D
Panasonic GM5   Pentax 645D
Mirrorless system camera Digital single lens reflex
Micro Four Thirds lenses Pentax 645 mount lenses
15.8 MP – Four Thirds sensor 39.5 MP – Medium Format sensor
1080/60p Video no Video
ISO 200-25,600 ISO 100-1,600
Electronic viewfinder (1166k dots) Optical viewfinder
3.0" LCD – 921k dots 3.0" LCD – 921k dots
Fixed touchscreen Fixed screen (not touch-sensitive)
5.8 shutter flaps per second 1.1 shutter flaps per second
not weather sealedWeathersealed body
220 shots per battery charge800 shots per battery charge
99 x 60 x 36 mm, 211 g 156 x 117 x 119 mm, 1480 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Panasonic Lumix DMC-GM5 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.

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Body comparison

An illustration of the physical size and weight of the Panasonic GM5 and the Pentax 645D is provided 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.

The GM5 can be obtained in two different colors (black, silver), while the 645D is only available in black.

Size Panasonic GM5 vs Pentax 645D
Compare GM5 versus 645D top
Comparison GM5 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 considerably larger (207 percent) than the Panasonic GM5. Moreover, the 645D is substantially heavier (601 percent) than the GM5. It is noteworthy in this context that the 645D is splash and dust-proof, while the GM5 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 GM5 gets 220 shots out of its Panasonic DMW-BLH7 battery, while the 645D can take 800 images on a single charge of its Pentax 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, 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
Street
Price
1.
 
Panasonic GM5 99 mm 60 mm 36 mm 211 g 220 n Sep 2014 US$ 749ebay.com
2.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 US$ 9 995ebay.com
3.
 
Canon 1D Mark IV 156 mm 157 mm 80 mm 1230 g 1500 Y Oct 2009 US$ 4 999ebay.com
4.
 
Canon 1D X 158 mm 168 mm 83 mm 1551 g 1120 Y Oct 2011 US$ 6 799ebay.com
5.
 
Leica S Typ 006 160 mm 120 mm 80 mm 1260 g .. Y Sep 2012 US$ 21 949ebay.com
6.
 
Nikon D3S 160 mm 157 mm 88 mm 1240 g 4200 Y Oct 2009 US$ 5 199ebay.com
7.
 
Panasonic G6 122 mm 85 mm 71 mm 390 g 340 n Apr 2013 US$ 599ebay.com
8.
 
Panasonic G7 125 mm 86 mm 77 mm 410 g 350 n May 2015 US$ 649ebay.com
9.
 
Panasonic GH2 124 mm 90 mm 76 mm 442 g 330 n Sep 2010 US$ 899ebay.com
10.
 
Panasonic GH4 133 mm 93 mm 84 mm 560 g 500 Y Feb 2014 US$ 1 499ebay.com
11.
 
Panasonic GM1 99 mm 55 mm 30 mm 204 g 230 n Oct 2013 US$ 749ebay.com
12.
 
Panasonic GX1 116 mm 68 mm 39 mm 318 g 320 n Nov 2011 US$ 699ebay.com
13.
 
Panasonic GX85 122 mm 71 mm 44 mm 426 g 290 n Apr 2016 US$ 799 amazon.com
14.
 
Panasonic LX100 115 mm 66 mm 55 mm 393 g 300 n Sep 2014 US$ 899ebay.com
15.
 
Pentax 645Z 156 mm 117 mm 123 mm 1550 g 650 Y Apr 2014 US$ 8 499ebay.com
16.
 
Ricoh GR 117 mm 61 mm 35 mm 245 g 290 n Apr 2013 US$ 799ebay.com
17.
 
Ricoh GR II 117 mm 63 mm 35 mm 251 g 320 n Jun 2015 US$ 699ebay.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 naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The GM5 was launched at a markedly lower price (by 93 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 size of the imaging sensor is a crucial determinant of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have richer color-depth than smaller pixels in a sensor of the same technological generation. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Panasonic GM5 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 GM5 and Pentax 645D sensor measures

With 39.5MP, the 645D offers a higher resolution than the GM5 (15.8MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 3.77μm for the GM5) due to its larger sensor. However, the GM5 is a much more recent model (by 4 years and 6 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 the 645D has no anti-alias filter installed, so that it can capture all the detail its 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 GM5 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 Panasonic Lumix DMC-GM5 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).

In terms of underlying technology, the GM5 is build around a CMOS sensor, while the 645D uses a CCD 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.

GM5 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 offers substantially better image quality than the GM5 (overall score 16 points higher). The advantage is based on 2.5 bits higher color depth, 0.9 EV in additional dynamic range, and 0.8 stops in additional low light sensitivity. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

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Sensor Characteristics
  empty Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Panasonic GM5 Four Thirds 15.8 4592 34481080/60p22.111.772166
2.
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282
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.
 
Leica S Typ 006 Medium Format 37.5 7500 5000none23.912.282476
6.
 
Nikon D3S Full Frame 12.1 4256 2832720/24p23.512.0325382
7.
 
Panasonic G6 Four Thirds 15.9 4608 34561080/60p21.311.563961
8.
 
Panasonic G7 Four Thirds 15.8 4592 34484K/30p22.812.490471
9.
 
Panasonic GH2 Four Thirds 15.9 4608 34561080/60i21.211.365560
10.
 
Panasonic GH4 Four Thirds 15.9 4608 34564K/30p23.212.879174
11.
 
Panasonic GM1 Four Thirds 15.8 4592 34481080/60i22.311.766066
12.
 
Panasonic GX1 Four Thirds 15.8 4592 34481080/60p20.810.670355
13.
 
Panasonic GX85 Four Thirds 15.8 4592 34484K/30p22.912.666271
14.
 
Panasonic LX100 Four Thirds 12.7 4112 30884K/30p22.312.555367
15.
 
Pentax 645Z Medium Format 51.1 8256 61921080/60i26.014.74505101
16.
 
Ricoh GR APS-C 16.1 4928 32641080/30p23.613.597278
17.
 
Ricoh GR II APS-C 16.1 4928 32641080/30p23.613.7107880
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras are not only capable of taking still images, but can also record movies. The GM5 indeed provides movie recording capabilities, while the 645D does not. The highest resolution format that the GM5 can use is 1080/60p.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the GM5 has an electronic viewfinder (1166k 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 GM5 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 0.46x), 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 GM5 and Pentax 645D along with similar information for a selection of comparators.

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Core Features
  empty Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Panasonic GM51166 n3.0 / 921 fixed Y 1/500s 5.8/s n n
2.
 
Pentax 645Doptical Y3.0 / 921 fixed n 1/4000s 1.1/s n 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.
 
Leica S Typ 006optical Y3.0 / 922 fixed n 1/4000s 1.5/s n n
6.
 
Nikon D3Soptical Y3.0 / 921 fixed n 1/8000s 11.0/s n n
7.
 
Panasonic G61440 n3.0 / 1036 swivel Y 1/4000s 7.0/s Y n
8.
 
Panasonic G72360 n3.0 / 1040 swivel Y 1/4000s 7.0/s Y n
9.
 
Panasonic GH21534 n3.0 / 460 swivel n 1/4000s 3.0/s Y n
10.
 
Panasonic GH42359 n3.0 / 1036 swivel Y 1/8000s 12.0/s Y n
11.
 
Panasonic GM1none n3.0 / 1036 fixed Y 1/500s 5.0/s Y n
12.
 
Panasonic GX1optional n3.0 / 460 fixed Y 1/4000s 4.2/s Y n
13.
 
Panasonic GX852765 n3.0 / 1040 tilting Y 1/4000s 8.0/s Y Y
14.
 
Panasonic LX1002764 n3.0 / 921 fixed n 1/4000s 11.0/s n Y
15.
 
Pentax 645Zoptical Y3.2 / 1037 tilting n 1/4000s 3.0/s n n
16.
 
Ricoh GRoptional n3.0 / 1230 fixed n 1/4000s 4.0/s Y n
17.
 
Ricoh GR IIoptional n3.0 / 1230 fixed n 1/4000s 4.0/s Y n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The GM5 has a touchscreen, while the 645D has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

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 GM5 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 GM5 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 GM5 and the 645D 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 GM5 only has one slot. The GM5 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 Panasonic Lumix DMC-GM5 and Pentax 645D 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.
 
Panasonic GM5Ystereo / mono--micro2.0Y--
2.
 
Pentax 645DYstereo / ----2.0---
3.
 
Canon 1D Mark IVYstereo / -Y-mini2.0---
4.
 
Canon 1D XYmono / -Y-mini2.0---
5.
 
Leica S Typ 006Y- / ---mini2.0---
6.
 
Nikon D3SYstereo / ---mini2.0---
7.
 
Panasonic G6Ystereo / monoY-mini2.0YY-
8.
 
Panasonic G7Ystereo / monoY-micro2.0Y--
9.
 
Panasonic GH2Ystereo / monoY-mini2.0---
10.
 
Panasonic GH4Ystereo / monoYYmicro2.0YY-
11.
 
Panasonic GM1-stereo / mono--micro2.0Y--
12.
 
Panasonic GX1Ystereo / mono--mini2.0---
13.
 
Panasonic GX85Ystereo / mono--micro2.0Y--
14.
 
Panasonic LX100Ystereo / mono--micro2.0YY-
15.
 
Pentax 645ZYstereo / monoY-mini3.0---
16.
 
Ricoh GRYmono / mono--micro2.0---
17.
 
Ricoh GR IIYstereo / mono--micro2.0YY-

It is notable that the GM5 offers wifi support, while the 645D does not. Wifi can be a very convenient means to transfer image data to an off-camera location.

Studio photographers will appreciate that the Pentax 645D (unlike the GM5) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the GM5 and the 645D have been discontinued, but can regularly be found used on ebay. The 645D was replaced by the Pentax 645Z, while the GM5 does not have a direct successor. Further information on the features and operation of the GM5 and 645D can be found, respectively, in the Panasonic GM5 Manual (free pdf) or the online Pentax 645D Manual.

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Review summary

So what conclusions can be drawn? Is there a clear favorite between the Panasonic GM5 and the Pentax 645D? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.

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Advantages of the Panasonic Lumix DMC-GM5:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Broader imaging potential: Can record not only still images but also 1080/60p 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%).
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Faster burst: Shoots at higher frequency (5.8 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 (99x60mm vs 156x117mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 1269g or 86 percent) and hence easier to carry around.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
  • More affordable: Was introduced into a lower priced category (93 percent cheaper at launch).
  • More modern: Reflects 4 years and 6 months of technical progress since the 645D launch.

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Arguments in favor of the Pentax 645D:

  • More detail: Has more megapixels (39.5 vs 15.8MP), which boosts linear resolution by 58%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores substantially higher (16 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (2.5 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (0.9 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (0.8 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 0.46x).
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/500s) to freeze action.
  • Longer lasting: Gets more shots (800 versus 220) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • 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 around for much longer (launched in March 2010).

If the number of relative strengths (bullet points above) is taken as a guide, the 645D comes out slightly ahead of the GM5 (15 : 14 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 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.

GM5 14:15 645D

How about other alternatives? Do the specifications of the Panasonic GM5 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 technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the GM5 or the 645D perform in practice. 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 (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

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Expert Camera Reviews
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price
Street
Price
1.
 
Panasonic GM53.5/5+..77/1005/54.5/5 Sep 2014 US$ 749ebay.com
2.
 
Pentax 645D5/5.......... Mar 2010 US$ 9 995ebay.com
3.
 
Canon 1D Mark IV5/5....89/100.... Oct 2009 US$ 4 999ebay.com
4.
 
Canon 1D X5/5......4.5/54.5/5 Oct 2011 US$ 6 799ebay.com
5.
 
Leica S Typ 006............ Sep 2012 US$ 21 949ebay.com
6.
 
Nikon D3S5/5....89/1004.5/55/5 Oct 2009 US$ 5 199ebay.com
7.
 
Panasonic G64/5+ +....5/54.5/5 Apr 2013 US$ 599ebay.com
8.
 
Panasonic G74/5+ +3.5/580/1005/54.5/5 May 2015 US$ 649ebay.com
9.
 
Panasonic GH25/5+ +..79/1004.5/55/5 Sep 2010 US$ 899ebay.com
10.
 
Panasonic GH45/5+ +..85/1005/55/5 Feb 2014 US$ 1 499ebay.com
11.
 
Panasonic GM13/5+..78/1005/54.5/5 Oct 2013 US$ 749ebay.com
12.
 
Panasonic GX13/5+..77/1004.5/54.5/5 Nov 2011 US$ 699ebay.com
13.
 
Panasonic GX854.5/5+ +..82/1005/55/5 Apr 2016 US$ 799 amazon.com
14.
 
Panasonic LX1005/5+ +..85/1005/55/5 Sep 2014 US$ 899ebay.com
15.
 
Pentax 645Z5/5..3.5/5..4.5/55/5 Apr 2014 US$ 8 499ebay.com
16.
 
Ricoh GR5/5....79/1004.5/54.5/5 Apr 2013 US$ 799ebay.com
17.
 
Ricoh GR II........4.5/54.5/5 Jun 2015 US$ 699ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, 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 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.

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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 your choice using the following search menu. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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    Specifications: Panasonic GM5 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 GM5 Pentax 645D
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Micro Four Thirds lenses Pentax 645 mount lenses
    Launch Date September 2014 March 2010
    Launch Price USD 749 USD 9,995
    Sensor Specs Panasonic GM5 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 15.8 Megapixels 39.5 Megapixels
    Image Resolution 4592 x 3448 pixels 7264 x 5440 pixels
    Pixel Pitch 3.77 μm 6.06 μm
    Pixel Density 7.04 MP/cm2 2.72 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 1080/60p Video no Video
    ISO Setting 200 - 25,600 ISO 100 - 1,600 ISO
    ISO Boost 100 - 25,600 ISO no Enhancement
    Image Processor Venus PRIME II
    DXO Sensor Quality (score) 66 82
    DXO Color Depth (bits) 22.1 24.6
    DXO Dynamic Range (EV) 11.7 12.6
    DXO Low Light (ISO) 721 1262
    Screen Specs Panasonic GM5 Pentax 645D
    Viewfinder Type Electronic viewfinder Optical viewfinder
    Viewfinder Field of View 100% 98%
    Viewfinder Magnification 0.46x 0.78x
    Viewfinder Resolution 1166k dots
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 921k dots 921k dots
    LCD Attachment Fixed screen Fixed screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Panasonic GM5 Pentax 645D
    Focus System Contrast-detect AF Phase-detect AF
    Manual Focusing AidFocus Peakingno Peaking Feature
    Continuous Shooting 5.8 shutter flaps/s 1.1 shutter flaps/s
    Electronic Shutterup to 1/16000sno E-Shutter
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium SDXC cards SDXC cards
    Single or Dual Card Slots Single card slot Dual card slots
    UHS card support UHS-I no
    Connectivity Specs Panasonic GM5 Pentax 645D
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 2.0
    HDMI Port micro HDMI no HDMI
    Wifi Support Wifi built-in no Wifi
    Body Specs Panasonic GM5 Pentax 645D
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Panasonic DMW-BLH7 Pentax D-LI90
    Battery Life (CIPA)220 shots per charge800 shots per charge
    Body Dimensions 99 x 60 x 36 mm
    (3.9 x 2.4 x 1.4 in)
    156 x 117 x 119 mm
    (6.1 x 4.6 x 4.7 in)
    Camera Weight 211 g (7.4 oz) 1480 g (52.2 oz)
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