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Panasonic GM1 vs Sony A7S

The Panasonic Lumix DMC-GM1 and the Sony Alpha A7S are two digital cameras that were revealed to the public, respectively, in October 2013 and April 2014. Both the GM1 and the A7S are mirrorless interchangeable lens cameras that are based on a Four Thirds (GM1) and a full frame (A7S) sensor. The Panasonic has a resolution of 15.8 megapixels, whereas the Sony provides 12 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
Sony A7S
Panasonic GM1   Sony A7S
Mirrorless system camera Mirrorless system camera
Micro Four Thirds lenses Sony E mount lenses
15.8 MP – Four Thirds sensor 12 MP – Full Frame sensor
1080/60i Video 1080/60p Video
ISO 200-25,600 ISO 100-102,400 (50 - 409,600)
No viewfinder, LCD framing Electronic viewfinder (2400k dots)
3.0" LCD – 1036k dots 3.0" LCD – 921k dots
Fixed touchscreen Tilting screen (no touchscreen)
5 shutter flaps per second 5 shutter flaps per second
not weather sealedWeathersealed body
230 shots per battery charge380 shots per battery charge
99 x 55 x 30 mm, 204 g 127 x 94 x 48 mm, 489 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 Sony Alpha A7S? 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

An illustration of the physical size and weight of the Panasonic GM1 and the Sony A7S 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 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 A7S is only available in black.

Size Panasonic GM1 vs Sony A7S
Compare GM1 versus A7S top
Comparison GM1 or A7S rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7S is considerably larger (119 percent) than the Panasonic GM1. Moreover, the A7S is substantially heavier (140 percent) than the GM1. It is noteworthy in this context that the A7S 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. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can compare the optics available for the two cameras in the Micro Four Thirds Lens Catalog (GM1) and the Sony FE Lens Catalog (A7S). 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 DMW-BLH7 battery, while the A7S can take 380 images on a single charge of its NP-FW50 power pack. The power pack in the A7S can be charged via the USB port, which can be very convenient when travelling.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

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Body Specifications
    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.
 
Sony A7S 127 mm 94 mm 48 mm 489 g 380 Y Apr 2014 2,499ebay.com
3.
 
Nikon Df 144 mm 110 mm 67 mm 760 g 1400 Y Nov 2013 2,749ebay.com
4.
 
Panasonic GM5 99 mm 60 mm 36 mm 211 g 220 n Sep 2014 749ebay.com
5.
 
Panasonic LX100 115 mm 66 mm 55 mm 393 g 300 n Sep 2014 899ebay.com
6.
 
Panasonic G6 122 mm 85 mm 71 mm 390 g 340 n Apr 2013 599ebay.com
7.
 
Panasonic GX7 123 mm 71 mm 55 mm 402 g 350 n Aug 2013 999ebay.com
8.
 
Panasonic G5 120 mm 83 mm 71 mm 396 g 320 n Jul 2012 599ebay.com
9.
 
Panasonic GH3 133 mm 93 mm 82 mm 550 g 540 Y Sep 2012 1,299ebay.com
10.
 
Panasonic G3 115 mm 84 mm 47 mm 336 g 270 n May 2011 599ebay.com
11.
 
Panasonic GX1 116 mm 68 mm 39 mm 318 g 320 n Nov 2011 699ebay.com
12.
 
Panasonic GH2 124 mm 90 mm 76 mm 442 g 330 n Sep 2010 899ebay.com
13.
 
Ricoh GR 117 mm 61 mm 35 mm 245 g 290 n Apr 2013 799ebay.com
14.
 
Sony A7S II 127 mm 96 mm 60 mm 627 g 370 Y Sep 2015 2,999ebay.com
15.
 
Sony A7 II 127 mm 96 mm 60 mm 599 g 350 Y Nov 2014 1,999ebay.com
16.
 
Sony A7 127 mm 94 mm 48 mm 474 g 340 Y Oct 2013 1,699ebay.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 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 GM1 was launched at a markedly lower price (by 70 percent) than the A7S, which puts it into a different market segment. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

Sensor comparison

The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units 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 Panasonic GM1 features a Four Thirds sensor and the Sony A7S a full frame sensor. The sensor area in the A7S is 280 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.0. The sensor in the GM1 has a native 4:3 aspect ratio, while the one in the A7S offers a 3:2 aspect.

Panasonic GM1 and Sony A7S sensor measures

Despite having a smaller sensor, the Panasonic GM1 offers a higher resolution of 15.8 megapixels, compared with 12 MP of the Sony A7S. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.77μm versus 8.45μm for the A7S). Moreover, it should be noted that the A7S is a somewhat more recent model (by 5 months) than the GM1, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units.

The resolution advantage of the Panasonic GM1 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the GM1 for good quality output (200 dots per inch) amounts to 23 x 17.2 inches or 58.3 x 43.8 cm, for very good quality (250 dpi) 18.4 x 13.8 inches or 46.7 x 35 cm, and for excellent quality (300 dpi) 15.3 x 11.5 inches or 38.9 x 29.2 cm. The corresponding values for the Sony A7S are 21.2 x 14.2 inches or 53.8 x 36 cm for good quality, 17 x 11.3 inches or 43.1 x 28.8 cm for very good quality, and 14.1 x 9.4 inches or 35.9 x 24 cm for excellent quality prints.

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 Sony Alpha A7S are ISO 100 to ISO 102400, with the possibility to increase the ISO range to 50-409600.

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 A7S MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. Of the two cameras under consideration, the A7S offers substantially better image quality than the GM1 (overall score 21 points higher). The advantage is based on 1.6 bits higher color depth, 1.5 EV in additional dynamic range, and 2.5 stops in additional low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

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Sensor Characteristics
    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.
 
Sony A7S Full Frame 12.0 4240 28321080/60p23.913.2370287
3.
 
Nikon Df Full Frame 16.2 4928 3280none24.613.1327989
4.
 
Panasonic GM5 Four Thirds 15.8 4592 34481080/60p22.111.772166
5.
 
Panasonic LX100 Four Thirds 12.7 4112 30884K/30p22.312.555367
6.
 
Panasonic G6 Four Thirds 15.9 4608 34561080/60p21.311.563961
7.
 
Panasonic GX7 Four Thirds 15.8 4592 34481080/60p22.612.271870
8.
 
Panasonic G5 Four Thirds 15.9 4608 34561080/60p22.311.964366
9.
 
Panasonic GH3 Four Thirds 15.9 4608 34561080/60p22.712.481271
10.
 
Panasonic G3 Four Thirds 15.8 4592 34481080/60i21.010.666756
11.
 
Panasonic GX1 Four Thirds 15.8 4592 34481080/60p20.810.670355
12.
 
Panasonic GH2 Four Thirds 15.9 4608 34561080/60i21.211.365560
13.
 
Ricoh GR APS-C 16.1 4928 32641080/30p23.613.597278
14.
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
15.
 
Sony A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990
16.
 
Sony A7 Full Frame 24.0 6000 40001080/60p24.814.2224890
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 are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the A7S provides a faster frame rate than the GM1. It can shoot movie footage at 1080/60p, while the Panasonic is limited to 1080/60i.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the A7S has an electronic viewfinder (2400k 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 Sony A7S along with similar information for a selection of comparators.

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Core Features
    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.
 
Sony A7S2400 n3.0 / 921 tilting n 1/8000s 5.0/s n n
3.
 
Nikon Dfoptical Y3.2 / 921 fixed n 1/4000s 5.5/s n n
4.
 
Panasonic GM51166 n3.0 / 921 fixed Y 1/500s 5.8/s n n
5.
 
Panasonic LX1002764 n3.0 / 921 fixed n 1/4000s 11.0/s n Y
6.
 
Panasonic G61440 n3.0 / 1036 swivel Y 1/4000s 7.0/s Y n
7.
 
Panasonic GX72760 n3.0 / 1040 tilting Y 1/8000s 5.0/s Y Y
8.
 
Panasonic G51440 n3.0 / 920 swivel Y 1/4000s 6.0/s Y n
9.
 
Panasonic GH31746 n3.0 / 614 swivel Y 1/4000s 6.0/s Y n
10.
 
Panasonic G31440 n3.0 / 460 swivel Y 1/4000s 4.0/s Y n
11.
 
Panasonic GX1optional n3.0 / 460 fixed Y 1/4000s 4.2/s Y n
12.
 
Panasonic GH21534 n3.0 / 460 swivel n 1/4000s 3.0/s Y n
13.
 
Ricoh GRoptional n3.0 / 1230 fixed n 1/4000s 4.0/s Y n
14.
 
Sony A7S II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
15.
 
Sony A7 II2400 n3.0 / 1230 tilting n 1/8000s 5.0/s n Y
16.
 
Sony A72400 n3.0 / 1230 tilting n 1/8000s 5.0/s n n
17.
 
Sony A7R2400 n3.0 / 1230 tilting n 1/8000s 4.0/s n n
Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One difference between the cameras concerns the presence of an on-board flash. The GM1 has one, while the A7S does not. While the built-in flash of the GM1 is not very powerful, it can at times be useful as a fill-in light.

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 has 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.

The GM1 writes its imaging data to SDXC cards, while the A7S uses SDXC or Memory Stick PRO Duo cards. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.

Connectivity comparison

For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Panasonic Lumix DMC-GM1 and Sony Alpha A7S and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
    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.
 
Sony A7SYstereo / monoYYmicro2.0YY-
3.
 
Nikon DfY- / ---mini2.0---
4.
 
Panasonic GM5Ystereo / mono--micro2.0Y--
5.
 
Panasonic LX100Ystereo / mono--micro2.0YY-
6.
 
Panasonic G6Ystereo / monoY-mini2.0YY-
7.
 
Panasonic GX7Ystereo / mono--mini2.0YY-
8.
 
Panasonic G5Ystereo / mono--mini2.0---
9.
 
Panasonic GH3Ystereo / monoYYmini2.0Y--
10.
 
Panasonic G3Ystereo / mono--mini2.0---
11.
 
Panasonic GX1Ystereo / mono--mini2.0---
12.
 
Panasonic GH2Ystereo / monoY-mini2.0---
13.
 
Ricoh GRYmono / mono--micro2.0---
14.
 
Sony A7S IIYstereo / monoYYmicro2.0YY-
15.
 
Sony A7 IIYstereo / monoYYmicro2.0YY-
16.
 
Sony A7Ystereo / monoYYmicro2.0YY-
17.
 
Sony A7RYstereo / monoYYmicro2.0YY-

It is notable that the A7S 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.

Both the GM1 and the A7S have been discontinued, but can regularly be found used on ebay. The GM1 was replaced by the Panasonic GM5, while the A7S was followed by the Sony A7S II. Further information on the features and operation of the GM1 and A7S can be found, respectively, in the Panasonic GM1 Manual (free pdf) or the online Sony A7S Manual.

Review summary

So how do things add up? Which of the two cameras – the Panasonic GM1 or the Sony A7S – 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 DMC-GM1:

  • More detail: Offers more megapixels (15.8 vs 12MP) with a 13% higher linear resolution.
  • More detailed LCD: Has a higher resolution rear screen (1036k vs 921k dots).
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • More compact: Is smaller (99x55mm vs 127x94mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 285g or 58 percent) and hence easier to carry around.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More affordable: Was introduced into a lower priced category (70 percent cheaper at launch).
  • More heavily discounted: Has been on the market for longer (launched in October 2013).

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Arguments in favor of the Sony Alpha A7S:

  • Better image quality: Scores substantially higher (21 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (1.6 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (1.5 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (2.5 stops ISO advantage).
  • Better video: Provides higher movie framerates (1080/60p versus 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 tilting screen for odd-angle shots in landscape orientation.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/500s) to freeze action.
  • Longer lasting: Gets more shots (380 versus 230) out of a single battery charge.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • 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.
  • More modern: Was introduced somewhat (5 months) more recently.

If the count of relative strengths (bullet points above) is taken as a measure, the A7S is the clear winner of the contest (16 : 9 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 09:16 A7S

How about other alternatives? Do the specifications of the Panasonic GM1 and the Sony A7S 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 specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the GM1 or the A7S perform in practice. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.

Expert reviews

This is why expert reviews are important. 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
     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.
 
Sony A7S4/5....86/1004.5/55/5 Apr 2014 2,499ebay.com
3.
 
Nikon Df4/5....81/1004/54/5 Nov 2013 2,749ebay.com
4.
 
Panasonic GM53.5/5+..77/1005/54.5/5 Sep 2014 749ebay.com
5.
 
Panasonic LX1005/5+ +..85/1005/55/5 Sep 2014 899ebay.com
6.
 
Panasonic G64/5+ +....5/54.5/5 Apr 2013 599ebay.com
7.
 
Panasonic GX74/5+..79/1005/55/5 Aug 2013 999ebay.com
8.
 
Panasonic G53/5+ +....4.5/54.5/5 Jul 2012 599ebay.com
9.
 
Panasonic GH35/5+ +..79/1004.5/54.5/5 Sep 2012 1,299ebay.com
10.
 
Panasonic G33/5+ +..75/1004.5/55/5 May 2011 599ebay.com
11.
 
Panasonic GX13/5+..77/1004.5/54.5/5 Nov 2011 699ebay.com
12.
 
Panasonic GH25/5+ +..79/1004.5/55/5 Sep 2010 899ebay.com
13.
 
Ricoh GR5/5....79/1004.5/54.5/5 Apr 2013 799ebay.com
14.
 
Sony A7S II5/5+....4.5/55/5 Sep 2015 2,999ebay.com
15.
 
Sony A7 II5/5+4/582/1004.5/55/5 Nov 2014 1,999ebay.com
16.
 
Sony A75/5+ +..80/1005/55/5 Oct 2013 1,699ebay.com
17.
 
Sony A7R5/5+ +..82/1004.5/55/5 Oct 2013 2,299ebay.com
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. Hence, a score should always be seen in the context of the camera's market launch date and its price, 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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Check A7S offers at
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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 make a corresponding selection in the search boxes below. 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 GM1 vs Sony A7S

    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 Sony A7S
    Camera Type Mirrorless system camera Mirrorless system camera
    Camera Lens Micro Four Thirds lenses Sony E mount lenses
    Launch Date October 2013 April 2014
    Launch Price USD 749 USD 2,499
    Sensor Specs Panasonic GM1 Sony A7S
    Sensor Technology CMOS CMOS
    Sensor Format Four Thirds Sensor Full Frame Sensor
    Sensor Size 17.3 x 13.0 mm 35.8 x 23.9 mm
    Sensor Area 224.9 mm2 855.62 mm2
    Sensor Diagonal 21.6 mm 43 mm
    Crop Factor 2.0x 1.0x
    Sensor Resolution 15.8 Megapixels 12 Megapixels
    Image Resolution 4592 x 3448 pixels 4240 x 2832 pixels
    Pixel Pitch 3.77 μm 8.45 μm
    Pixel Density 7.04 MP/cm2 1.40 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 1080/60i Video 1080/60p Video
    ISO Setting 200 - 25,600 ISO 100 - 102,400 ISO
    ISO Boost 125 - 25,600 ISO 50 - 409,600 ISO
    Image Processor Venus IX BIONZ X
    DXO Sensor Quality (score) 66 87
    DXO Color Depth (bits) 22.3 23.9
    DXO Dynamic Range (EV) 11.7 13.2
    DXO Low Light (ISO) 660 3702
    Screen Specs Panasonic GM1 Sony A7S
    Viewfinder Type no viewfinder Electronic viewfinder
    Viewfinder Field of View 100%
    Viewfinder Magnification 0.71x
    Viewfinder Resolution 2400k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1036k dots 921k dots
    LCD Attachment Fixed screen Tilting screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Panasonic GM1 Sony A7S
    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 5 shutter flaps/s
    Electronic Shutterup to 1/16000sYES
    Time-Lapse PhotographyIntervalometer built-inno Intervalometer
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium SDXC cards MS or SDXC cards
    Single or Dual Card Slots Single card slot Single card slot
    UHS card support UHS-I UHS-I
    Connectivity Specs Panasonic GM1 Sony A7S
    External Flash no Hotshoe Hotshoe
    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 Sony A7S
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type DMW-BLH7 NP-FW50
    Battery Life (CIPA)230 shots per charge380 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 99 x 55 x 30 mm
    (3.9 x 2.2 x 1.2 in)
    127 x 94 x 48 mm
    (5.0 x 3.7 x 1.9 in)
    Camera Weight 204 g (7.2 oz) 489 g (17.2 oz)
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    Check GM1 offers at
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    Check A7S offers at
    ebay.com

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