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Panasonic GM1 vs GH4

The Panasonic Lumix DMC-GM1 and the Panasonic Lumix DMC-GH4 are two digital cameras that were revealed to the public, respectively, in October 2013 and February 2014. Both the GM1 and the GH4 are mirrorless interchangeable lens cameras that are equipped with a Four Thirds sensor. The GM1 has a resolution of 15.8 megapixels, whereas the GH4 provides 15.9 MP.

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

Headline Specifications
Panasonic GM1
versus
Panasonic GH4
Panasonic GM1   Panasonic GH4
Mirrorless system camera Mirrorless system camera
Micro Four Thirds lenses Micro Four Thirds lenses
15.8 MP – Four Thirds sensor 15.9 MP – Four Thirds sensor
1080/60i Video 4K/30p Video
ISO 200-25,600 ISO 200-25,600
No viewfinder, LCD framing Electronic viewfinder (2359k dots)
3.0" LCD – 1036k dots 3.0" LCD – 1036k dots
Fixed touchscreen Swivel touchscreen
5 shutter flaps per second 12 shutter flaps per second
not weather sealedWeathersealed body
230 shots per battery charge500 shots per battery charge
99 x 55 x 30 mm, 204 g 133 x 93 x 84 mm, 560 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Panasonic Lumix DMC-GM1 and the Panasonic Lumix DMC-GH4? 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

The side-by-side display below illustrates the physical size and weight of the Panasonic GM1 and the Panasonic GH4. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth dimensions are rounded to the nearest millimeter.

The GM1 can be obtained in three different colors (black, silver, red), while the GH4 is only available in black.

Size Panasonic GM1 vs Panasonic GH4
Compare GM1 versus GH4 top
Comparison GM1 or GH4 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic GH4 is considerably larger (127 percent) than the Panasonic GM1. Moreover, the GH4 is substantially heavier (175 percent) than the GM1. It is noteworthy in this context that the GH4 is splash and dust-proof, while the GM1 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. In this particular case, both cameras feature the same lens mount, so that they can use the same lenses. You can compare the optics available in the Micro Four Thirds Lens Catalog. Mirrorless cameras, such as the two under consideration, have the additional advantage of having a short flange to focal plane distance, which makes it possible to mount many lenses from other systems onto the camera via adapters.

Concerning battery life, the GM1 gets 230 shots out of its Panasonic DMW-BLH7 battery, while the GH4 can take 500 images on a single charge of its Panasonic DMW-BLF19 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
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Panasonic GM1 99 mm 55 mm 30 mm 204 g 230 n Oct 2013 749ebay.com
2.
 
Panasonic GH4 133 mm 93 mm 84 mm 560 g 500 Y Feb 2014 1,499ebay.com
3.
 
Olympus E-M5 II 124 mm 85 mm 45 mm 469 g 310 Y Feb 2015 1,099ebay.com
4.
 
Olympus E-M1 130 mm 94 mm 63 mm 497 g 350 Y Sep 2013 1,399ebay.com
5.
 
Panasonic GH5 139 mm 98 mm 87 mm 725 g 410 Y Jan 2017 1,999ebay.com
6.
 
Panasonic GM5 99 mm 60 mm 36 mm 211 g 220 n Sep 2014 749ebay.com
7.
 
Panasonic LX100 115 mm 66 mm 55 mm 393 g 300 n Sep 2014 899ebay.com
8.
 
Panasonic G6 122 mm 85 mm 71 mm 390 g 340 n Apr 2013 599ebay.com
9.
 
Panasonic GX7 123 mm 71 mm 55 mm 402 g 350 n Aug 2013 999ebay.com
10.
 
Panasonic G5 120 mm 83 mm 71 mm 396 g 320 n Jul 2012 599ebay.com
11.
 
Panasonic GH3 133 mm 93 mm 82 mm 550 g 540 Y Sep 2012 1,299ebay.com
12.
 
Panasonic G3 115 mm 84 mm 47 mm 336 g 270 n May 2011 599ebay.com
13.
 
Panasonic GX1 116 mm 68 mm 39 mm 318 g 320 n Nov 2011 699ebay.com
14.
 
Panasonic GH2 124 mm 90 mm 76 mm 442 g 330 n Sep 2010 899ebay.com
15.
 
Ricoh GR 117 mm 61 mm 35 mm 245 g 290 n Apr 2013 799ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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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 GM1 was launched at a markedly lower price (by 50 percent) than the GH4, 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. 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. 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.

Both cameras under consideration feature a Four Thirds sensor and have a format factor (sometimes also referred to as "crop factor") of 2.0. Within the spectrum of camera sensors, this places the review cameras among the medium-sized sensor cameras that aim to strike a balance between image quality and portability. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.

Panasonic GM1 and Panasonic GH4 sensor measures

While the two cameras under review share the same sensor size, the GH4 offers a slightly higher resolution of 15.9 megapixels, compared with 15.8 MP of the GM1. This megapixels advantage translates into a 0.3 percent gain in linear resolution. On the other hand, these sensor specs imply that the GH4 has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.76μm versus 3.77μm for the GM1). However, it should be noted that the GH4 is a somewhat more recent model (by 3 months) than the GM1, and its sensor might have benefitted from technological advances during this time that at least partly compensate for the smaller pixel size.

The Panasonic Lumix DMC-GM1 has a native sensitivity range from ISO 200 to ISO 25600, which can be extended to ISO 125-25600. The corresponding ISO settings for the Panasonic Lumix DMC-GH4 are ISO 200 to ISO 25600, with the possibility to increase the ISO range to 100-25600.

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

GM1 versus GH4 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 GH4 has a markedly higher DXO score than the GM1 (overall score 8 points higher), which will translate into better image quality. The advantage is based on 0.9 bits higher color depth, 1.1 EV in additional dynamic range, and 0.3 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.

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Sensor Characteristics
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Panasonic GM1 Four Thirds 15.8 4592 34481080/60i22.311.766066
2.
 
Panasonic GH4 Four Thirds 15.9 4608 34564K/30p23.212.879174
3.
 
Olympus E-M5 II Four Thirds 15.9 4608 34561080/60p23.012.584273
4.
 
Olympus E-M1 Four Thirds 15.9 4608 34561080/30p23.012.775773
5.
 
Panasonic GH5 Four Thirds 20.2 5184 38884K/60p23.913.080777
6.
 
Panasonic GM5 Four Thirds 15.8 4592 34481080/60p22.111.772166
7.
 
Panasonic LX100 Four Thirds 12.7 4112 30884K/30p22.312.555367
8.
 
Panasonic G6 Four Thirds 15.9 4608 34561080/60p21.311.563961
9.
 
Panasonic GX7 Four Thirds 15.8 4592 34481080/60p22.612.271870
10.
 
Panasonic G5 Four Thirds 15.9 4608 34561080/60p21.411.661861
11.
 
Panasonic GH3 Four Thirds 15.9 4608 34561080/60p22.712.481271
12.
 
Panasonic G3 Four Thirds 15.8 4592 34481080/60i21.010.666756
13.
 
Panasonic GX1 Four Thirds 15.8 4592 34481080/60p20.810.670355
14.
 
Panasonic GH2 Four Thirds 15.9 4608 34561080/60i21.211.365560
15.
 
Ricoh GR APS-C 16.1 4928 32641080/30p23.613.597278
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Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the GH4 provides a better video resolution than the GM1. It can shoot movie footage at 4K/30p, while the GM1 is limited to 1080/60i.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the GH4 has an electronic viewfinder (2359k dots), which can be very helpful when shooting in bright sunlight. In contrast, the GM1 relies on live view and the rear LCD for framing. The adjacent table lists some of the other core features of the Panasonic GM1 and Panasonic GH4 along with similar information for a selection of comparators.

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Core Features
# image 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 GM1none n3.0 / 1036 fixed Y 1/500s 5.0/s Y n
2.
 
Panasonic GH42359 n3.0 / 1036 swivel Y 1/8000s 12.0/s Y n
3.
 
Olympus E-M5 II2360 n3.0 / 1037 swivel Y 1/8000s 10.0/s n Y
4.
 
Olympus E-M12360 n3.0 / 1037 tilting Y 1/8000s 10.0/s n Y
5.
 
Panasonic GH53680 n3.2 / 1620 swivel Y 1/8000s 12.0/s n Y
6.
 
Panasonic GM51166 n3.0 / 921 fixed Y 1/500s 5.8/s n n
7.
 
Panasonic LX1002764 n3.0 / 921 fixed n 1/4000s 11.0/s n Y
8.
 
Panasonic G61440 n3.0 / 1036 swivel Y 1/4000s 7.0/s Y n
9.
 
Panasonic GX72760 n3.0 / 1040 tilting Y 1/8000s 5.0/s Y Y
10.
 
Panasonic G51440 n3.0 / 920 swivel Y 1/4000s 6.0/s Y n
11.
 
Panasonic GH31746 n3.0 / 614 swivel Y 1/4000s 6.0/s Y n
12.
 
Panasonic G31440 n3.0 / 460 swivel Y 1/4000s 4.0/s Y n
13.
 
Panasonic GX1optional n3.0 / 460 fixed Y 1/4000s 4.2/s Y n
14.
 
Panasonic GH21534 n3.0 / 460 swivel n 1/4000s 3.0/s Y n
15.
 
Ricoh GRoptional 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.
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The GH4 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 GM1 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, both cameras under consideration feature an 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 GM1 and the Panasonic GH4 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 GM1 and the GH4 write their files to SDXC cards. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.

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Connectivity comparison

For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Panasonic Lumix DMC-GM1 and Panasonic Lumix DMC-GH4 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Panasonic GM1-stereo / mono--micro2.0Y--
2.
 
Panasonic GH4Ystereo / monoYYmicro2.0YY-
3.
 
Olympus E-M5 IIYstereo / monoY-micro2.0Y--
4.
 
Olympus E-M1Ystereo / monoY-micro2.0Y--
5.
 
Panasonic GH5Ystereo / monoYYfull3.1Y-Y
6.
 
Panasonic GM5Ystereo / mono--micro2.0Y--
7.
 
Panasonic LX100Ystereo / mono--micro2.0YY-
8.
 
Panasonic G6Ystereo / monoY-mini2.0YY-
9.
 
Panasonic GX7Ystereo / mono--mini2.0YY-
10.
 
Panasonic G5Ystereo / mono--mini2.0---
11.
 
Panasonic GH3Ystereo / monoYYmini2.0Y--
12.
 
Panasonic G3Ystereo / mono--mini2.0---
13.
 
Panasonic GX1Ystereo / mono--mini2.0---
14.
 
Panasonic GH2Ystereo / monoY-mini2.0---
15.
 
Ricoh GRYmono / mono--micro2.0---
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It is notable that the GH4 has a headphone jack, which makes it possible to attach external headphones and monitor the quality of sound during the recording process. The GM1 lacks such a headphone port.

Studio photographers will appreciate that the Panasonic GH4 (unlike the GM1) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the GM1 and the GH4 have been discontinued, but can regularly be found used on ebay. The GM1 was replaced by the Panasonic GM5, while the GH4 was followed by the Panasonic GH5. Further information on the features and operation of the GM1 and GH4 can be found, respectively, in the Panasonic GM1 Manual (free pdf) or the online Panasonic GH4 Manual.

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Review summary

So what is the bottom line? Is the Panasonic GM1 better than the Panasonic GH4 or vice versa? A synthesis of the relative strong points of each of the models is listed below.


Arguments in favor of the Panasonic Lumix DMC-GM1:

  • More compact: Is smaller (99x55mm vs 133x93mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 356g or 64 percent) and hence easier to carry around.
  • More affordable: Was introduced into a lower priced category (50 percent cheaper at launch).
  • More heavily discounted: Has been on the market for longer (launched in October 2013).


Advantages of the Panasonic Lumix DMC-GH4:

  • Better image quality: Scores markedly higher (8 points) in the DXO overall evaluation.
  • More dynamic range: Captures a broader range of light and dark details (1.1 EV of extra DR).
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60i).
  • Better sound: Can connect to an external microphone for higher quality sound recording.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • Easier framing: Has an electronic viewfinder for image composition and settings control.
  • More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
  • 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 1/500s) to freeze action.
  • Faster burst: Shoots at higher frequency (12 vs 5 flaps/sec) to capture the decisive moment.
  • Longer lasting: Gets more shots (500 versus 230) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • More modern: Was introduced somewhat (3 months) more recently.

If the count of relative strengths (bullet points above) is taken as a measure, the GH4 is the clear winner of the contest (16 : 4 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.

GM1 04:16 GH4

How about other alternatives? Do the specifications of the Panasonic GM1 and the Panasonic GH4 place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera listing 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 GM1 or the GH4 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
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Panasonic GM13/5+..78/1005/54.5/5 Oct 2013 749ebay.com
2.
 
Panasonic GH45/5+ +..85/1005/55/5 Feb 2014 1,499ebay.com
3.
 
Olympus E-M5 II5/5+ +4.5/581/1005/55/5 Feb 2015 1,099ebay.com
4.
 
Olympus E-M15/5+ +..84/1004.5/54.5/5 Sep 2013 1,399ebay.com
5.
 
Panasonic GH54.5/5+ +..85/1004.5/55/5 Jan 2017 1,999ebay.com
6.
 
Panasonic GM53.5/5+..77/1005/54.5/5 Sep 2014 749ebay.com
7.
 
Panasonic LX1005/5+ +..85/1005/55/5 Sep 2014 899ebay.com
8.
 
Panasonic G64/5+ +....5/54.5/5 Apr 2013 599ebay.com
9.
 
Panasonic GX74/5+..79/1005/55/5 Aug 2013 999ebay.com
10.
 
Panasonic G53/5+ +....4.5/54.5/5 Jul 2012 599ebay.com
11.
 
Panasonic GH35/5+ +..79/1004.5/54.5/5 Sep 2012 1,299ebay.com
12.
 
Panasonic G33/5+ +..75/1004.5/55/5 May 2011 599ebay.com
13.
 
Panasonic GX13/5+..77/1004.5/54.5/5 Nov 2011 699ebay.com
14.
 
Panasonic GH25/5+ +..79/1004.5/55/5 Sep 2010 899ebay.com
15.
 
Ricoh GR5/5....79/1004.5/54.5/5 Apr 2013 799ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. 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, 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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Panasonic GM1 vs Panasonic GH4

    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 GM1 Panasonic GH4
    Camera Type Mirrorless system camera Mirrorless system camera
    Camera Lens Micro Four Thirds lenses Micro Four Thirds lenses
    Launch Date October 2013 February 2014
    Launch Price USD 749 USD 1,499
    Sensor Specs Panasonic GM1 Panasonic GH4
    Sensor Technology CMOS CMOS
    Sensor Format Four Thirds Sensor Four Thirds Sensor
    Sensor Size 17.3 x 13.0 mm 17.3 x 13.0 mm
    Sensor Area 224.9 mm2 224.9 mm2
    Sensor Diagonal 21.6 mm 21.6 mm
    Crop Factor 2.0x 2.0x
    Sensor Resolution 15.8 Megapixels 15.9 Megapixels
    Image Resolution 4592 x 3448 pixels 4608 x 3456 pixels
    Pixel Pitch 3.77 μm 3.76 μm
    Pixel Density 7.04 MP/cm2 7.08 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 1080/60i Video 4K/30p Video
    ISO Setting 200 - 25,600 ISO 200 - 25,600 ISO
    ISO Boost 125 - 25,600 ISO 100 - 25,600 ISO
    Image Processor Venus IX Venus IX
    DXO Sensor Quality (score) 66 74
    DXO Color Depth (bits) 22.3 23.2
    DXO Dynamic Range (EV) 11.7 12.8
    DXO Low Light (ISO) 660 791
    Screen Specs Panasonic GM1 Panasonic GH4
    Viewfinder Type no viewfinder Electronic viewfinder
    Viewfinder Field of View 100%
    Viewfinder Magnification 0.67x
    Viewfinder Resolution 2359k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1036k dots 1036k dots
    LCD Attachment Fixed screen Swivel screen
    Touch Input Touchscreen Touchscreen
    Shooting Specs Panasonic GM1 Panasonic GH4
    Focus System Contrast-detect AF Contrast-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/500s 1/8000s
    Continuous Shooting 5 shutter flaps/s 12 shutter flaps/s
    Electronic Shutterup to 1/16000sup to 1/8000s
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Fill Flash Built-in Flash Built-in Flash
    Storage Medium SDXC cards SDXC cards
    Single or Dual Card Slots Single card slot Single card slot
    UHS card support UHS-I UHS-I
    Connectivity Specs Panasonic GM1 Panasonic GH4
    External Flash no Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 2.0
    HDMI Port micro HDMI micro HDMI
    Microphone Port no MIC socket External MIC port
    Headphone Socket no Headphone port Headphone port
    Wifi Support Wifi built-in Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Body Specs Panasonic GM1 Panasonic GH4
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Panasonic DMW-BLH7 Panasonic DMW-BLF19
    Battery Life (CIPA)230 shots per charge500 shots per charge
    Body Dimensions 99 x 55 x 30 mm
    (3.9 x 2.2 x 1.2 in)
    133 x 93 x 84 mm
    (5.2 x 3.7 x 3.3 in)
    Camera Weight 204 g (7.2 oz) 560 g (19.8 oz)
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