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Panasonic GM1 vs Sony RX1

The Panasonic Lumix DMC-GM1 and the Sony Cyber-shot DSC-RX1 are two digital cameras that were officially introduced, respectively, in October 2013 and September 2012. The GM1 is a mirrorless interchangeable lens camera, while the RX1 is a fixed lens compact. The cameras are based on a Four Thirds (GM1) and a full frame (RX1) sensor. The Panasonic has a resolution of 15.8 megapixels, whereas the Sony provides 24 MP. Read on to find out how these two cameras compare with respect to their body size, their sensors, their features, their input-output connections, and their reception by expert reviewers.

Headline Specifications
Panasonic GM1   Sony RX1
Panasonic GM1 Sony RX1
Mirrorless system camera Fixed lens compact camera
Micro Four Thirds lenses 35mm f/2.0
15.8 MP, Four Thirds Sensor 24 MP, Full Frame Sensor
1080/60i Video 1080/60p Video
ISO 200-25600 ISO 100-25600 (50-102400)
No viewfinder, LCD framing Viewfinder optional
3.0" LCD, 1036k dots 3.0" LCD, 1229k dots
Fixed touchscreen Fixed screen (not touch-sensitive)
5 shutter flaps per second 5 shutter flaps per second
230 shots per battery charge270 shots per battery charge
99 x 55 x 30 mm, 204 g 113 x 65 x 70 mm, 482 g

Body comparison: Panasonic GM1 vs Sony RX1

An illustration of the physical size and weight of the Panasonic GM1 and the Sony RX1 is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth dimensions are rounded to the nearest millimeter.

Compare Panasonic GM1 and Sony RX1
Compare GM1 versus RX1 top
Compare GM1 or RX1 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony RX1 is notably larger (35 percent) than the Panasonic GM1. In this context, it is worth noting that neither the GM1 nor the RX1 are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the RX1 has a lens built in, whereas the GM1 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can compare the optics available for the GM1 and their specifications in the Micro Four Thirds Lens Catalog.

Concerning battery life, the GM1 gets 230 shots out of its DMW-BLH7 battery, while the RX1 can take 270 images on a single charge of its NP-BX1 power pack. The power pack in the RX1 can be charged via the USB port, which can be very convenient when travelling.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. In case you want to display and compare another camera duo, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Panasonic GM1» 3.9 in 2.2 in 1.2 in 7.2 oz 230 n Oct 2013 749- i Panasonic GM1
Sony RX1« 4.4 in 2.6 in 2.8 in 17.0 oz 270 n Sep 2012 2,799- i Sony RX1
Nikon D5300« » 4.9 in 3.9 in 3.0 in 16.9 oz 600 n Oct 2013 799- i Nikon D5300
Panasonic GM5« » 3.9 in 2.4 in 1.4 in 7.4 oz 220 n Sep 2014 749- i Panasonic GM5
Panasonic LX100« » 4.5 in 2.6 in 2.2 in 13.9 oz 300 n Sep 2014 899 i i Panasonic LX100
Panasonic G6« » 4.8 in 3.3 in 2.8 in 13.8 oz 340 n Apr 2013 599- i Panasonic G6
Panasonic GF6« » 4.4 in 2.6 in 1.5 in 11.4 oz 340 n Apr 2013 499- i Panasonic GF6
Panasonic GX7« » 4.8 in 2.8 in 2.2 in 14.2 oz 350 n Aug 2013 999- i Panasonic GX7
Panasonic G5« » 4.7 in 3.3 in 2.8 in 14.0 oz 320 n Jul 2012 599- i Panasonic G5
Panasonic GF5« » 4.3 in 2.6 in 1.5 in 9.4 oz 360 n Apr 2012 499- i Panasonic GF5
Panasonic GH3« » 5.2 in 3.7 in 3.2 in 19.4 oz 540 Y Sep 2012 1,299- i Panasonic GH3
Panasonic G3« » 4.5 in 3.3 in 1.9 in 11.9 oz 270 n May 2011 599- i Panasonic G3
Ricoh GR« » 4.6 in 2.4 in 1.4 in 8.6 oz 290 n Apr 2013 799- i Ricoh GR
Sony RX1R II« » 4.4 in 2.6 in 2.8 in 17.9 oz 220 n Oct 2015 3,299 i i Sony RX1R II
Sony A3000« » 5.0 in 3.6 in 3.3 in 14.5 oz 470 n Aug 2013 329- i Sony A3000
Sony RX1R« » 4.4 in 2.6 in 2.8 in 17.0 oz 270 n Jun 2013 2,799- i Sony RX1R
Sony NEX-7« » 4.7 in 2.6 in 1.7 in 14.1 oz 430 n Aug 2011 1,349- i Sony NEX-7

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. 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: Panasonic GM1 vs Sony RX1

The size of the imaging sensor is a crucial determinant 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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors tend to be associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Panasonic GM1 features a Four Thirds sensor and the Sony RX1 a full frame sensor. The sensor area in the RX1 is 279 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 RX1 offers a 3:2 aspect.

Panasonic GM1 and Sony RX1 sensor measures

With 24MP, the RX1 offers a higher resolution than the GM1 (15.8MP), but the RX1 nevertheless has larger individual pixels (pixel pitch of 5.96μm versus 3.77μm for the GM1) due to its larger sensor. However, the GM1 is a somewhat more recent model (by 1 year and 1 month) than the RX1, and its sensor might have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units.

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 Cyber-shot DSC-RX1 are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-102400..

GM1 versus RX1 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 RX1 offers substantially better image quality than the GM1 (overall score 27 points higher). The advantage is based on 2.8 bits higher color depth, 2.6 EV in additional dynamic range, and 1.9 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.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Panasonic GM1» Four Thirds 15.8 4592 34481080/60i22.311.766066Panasonic GM1
Sony RX1« Full Frame 24.0 6000 40001080/60p25.114.3253493Sony RX1
Nikon D5300« » APS-C 24.0 6000 40001080/60p24.013.9133883Nikon D5300
Panasonic GM5« » Four Thirds 15.8 4592 34481080/60p22.111.772166Panasonic GM5
Panasonic LX100« » Four Thirds 12.7 4112 30884K/30p22.312.555367Panasonic LX100
Panasonic G6« » Four Thirds 15.9 4608 34561080/60p21.311.563961Panasonic G6
Panasonic GF6« » Four Thirds 15.8 4592 34481080/60i20.710.662254Panasonic GF6
Panasonic GX7« » Four Thirds 15.8 4592 34481080/60p22.612.271870Panasonic GX7
Panasonic G5« » Four Thirds 15.9 4608 34561080/60p----Panasonic G5
Panasonic GF5« » Four Thirds 12.0 4000 30001080/60i21.411.661861Panasonic GF5
Panasonic GH3« » Four Thirds 15.9 4608 34561080/60p22.712.481271Panasonic GH3
Panasonic G3« » Four Thirds 15.8 4592 34481080/60i21.010.666756Panasonic G3
Ricoh GR« » APS-C 16.1 4928 32641080/30p23.613.597278Ricoh GR
Sony RX1R II« » Full Frame 42.2 7952 53041080/60p25.813.9320497Sony RX1R II
Sony A3000« » APS-C 19.8 5456 36321080/60i23.712.8106878Sony A3000
Sony RX1R« » Full Frame 24.0 6000 40001080/60p25.013.6253791Sony RX1R
Sony NEX-7« » APS-C 24.0 6000 40001080/60i24.113.4101681Sony NEX-7

Many modern cameras are not only capable of taking still images, but can also record movies. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the RX1 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: Panasonic GM1 vs Sony RX1

Apart from body and sensor, cameras can and do differ across a range of features. The GM1 and the RX1 are similar in the sense that neither of the two has a viewfinder. The images are, thus, framed using live view on the rear LCD. That said, the RX1 can be equipped with an optional viewfinder – the FDA-EV1MK. The following table reports on some other key feature differences and similarities of the Panasonic GM1, the Sony RX1, and comparable cameras.

Core Features
  Camera
Model
Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
Camera
Model
Panasonic GM1»- n 3.0 1036 fixed Y 500 5.0 Y n Panasonic GM1
Sony RX1«- n 3.0 1229 fixed n 4000 5.0 Y n Sony RX1
Nikon D5300« »optical n 3.2 1037 swivel n 4000 5.0 Y n Nikon D5300
Panasonic GM5« »1166 n 3.0 921 fixed Y 500 5.8 n n Panasonic GM5
Panasonic LX100« »2764 n 3.0 921 fixed n 4000 11.0 n Y Panasonic LX100
Panasonic G6« »1440 n 3.0 1036 swivel Y 4000 7.0 Y n Panasonic G6
Panasonic GF6« »- n 3.0 1040 tilting Y 4000 4.2 Y n Panasonic GF6
Panasonic GX7« »2760 n 3.0 1040 tilting Y 8000 5.0 Y Y Panasonic GX7
Panasonic G5« »1440 n 3.0 920 swivel Y 4000 6.0 Y n Panasonic G5
Panasonic GF5« »- n 3.0 920 fixed Y 4000 4.0 Y n Panasonic GF5
Panasonic GH3« »1746 n 3.0 614 swivel Y 4000 6.0 Y n Panasonic GH3
Panasonic G3« »1440 n 3.0 460 swivel Y 4000 4.0 Y n Panasonic G3
Ricoh GR« »- n 3.0 1230 fixed n 4000 4.0 Y n Ricoh GR
Sony RX1R II« »2360 n 3.0 1229 tilting n 4000 5.0 n n Sony RX1R II
Sony A3000« »202 n 3.0 230 fixed n 4000 2.5 Y n Sony A3000
Sony RX1R« »- n 3.0 1229 fixed n 4000 5.0 Y n Sony RX1R
Sony NEX-7« »2359 n 3.0 921 tilting n 4000 10.0 Y n Sony NEX-7

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The GM1 has a touchscreen, while the RX1 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

The reported shutter speed and shutter burst refer to the use of the mechanical shutter. In addition, the GM1 features 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 GM1 writes its imaging data to SDXC cards, while the RX1 uses SDXC or Memory Stick PRO Duo cards.

 

Connectivity comparison: Panasonic GM1 vs Sony RX1

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 Cyber-shot DSC-RX1 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
Panasonic GM1»-stereomono--micro2.0Y--Panasonic GM1
Sony RX1«YstereomonoY-mini2.0---Sony RX1
Nikon D5300« »YstereomonoY-mini2.0Y--Nikon D5300
Panasonic GM5« »Ystereomono--micro2.0Y--Panasonic GM5
Panasonic LX100« »Ystereomono--micro2.0YY-Panasonic LX100
Panasonic G6« »YstereomonoY-mini2.0YY-Panasonic G6
Panasonic GF6« »-stereomono--mini2.0YY-Panasonic GF6
Panasonic GX7« »Ystereomono--mini2.0YY-Panasonic GX7
Panasonic G5« »Ystereomono--mini2.0---Panasonic G5
Panasonic GF5« »-stereomono--mini2.0---Panasonic GF5
Panasonic GH3« »YstereomonoYYmini2.0Y--Panasonic GH3
Panasonic G3« »Ystereomono--mini2.0---Panasonic G3
Ricoh GR« »Ymonomono--micro2.0---Ricoh GR
Sony RX1R II« »YstereomonoY-micro2.0YY-Sony RX1R II
Sony A3000« »Ystereomono--mini2.0---Sony A3000
Sony RX1R« »YstereomonoY-mini2.0---Sony RX1R
Sony NEX-7« »Ystereomono--mini2.0---Sony NEX-7

It is notable that the GM1 offers wifi support, while the RX1 does not. Wifi can be a very convenient means to transfer image data to an off-camera location.

Both the GM1 and the RX1 have been discontinued, but can regularly be found used on eBay. The RX1 was replaced by the Sony RX1R, while the GM1 was followed by the Panasonic GM5.


Review summary: Panasonic GM1 vs Sony RX1

So what conclusions can be drawn? Is there a clear favorite between the Panasonic GM1 and the Sony RX1? The listing below highlights the relative strengths of the two models.

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Arguments in favor of the Panasonic Lumix DMC-GM1:

  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More flexible: Accepts interchangeable lenses, so that lens characteristics can be altered.
  • More compact: Is smaller (99x55mm vs 113x65mm) and thus needs less room in the bag.
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • More modern: Is somewhat more recent (announced 1 year and 1 month after the RX1).

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Reasons to prefer the Sony Cyber-shot DSC-RX1:

  • More detail: Has more megapixels (24 vs 15.8MP), which boosts linear resolution by 26%.
  • Better image quality: Scores substantially higher (27 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (2.8 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (2.6 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (1.9 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.
  • More framing options: Can be equipped with a hotshoe-mounted accessory-viewfinder.
  • More detailed LCD: Has a higher resolution rear screen (1229k vs 1036k dots).
  • Faster shutter: Has higher mechanical shutter speed (4000/sec vs 500/sec) to freeze action.
  • Ready to shoot: Has an integrated lens, whereas the GM1 necessitates an extra lens.
  • Longer lasting: Gets more shots (270 versus 230) out of a single battery charge.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
  • More heavily discounted: Has been on the market for longer (launched in September 2012).

If the count of relative strengths (bullet points above) is taken as a measure, the RX1 is the clear winner of the contest (14 : 6 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision.

GM1 06:14 RX1

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the GM1 and the RX1 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: Panasonic GM1 vs Sony RX1

This is why hands-on reviews by experts are important. The adjacent table relays the overall verdicts of several of the most popular camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). The detailed reviews can be accessed by clicking on the site logo in the table header.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Panasonic GM1»Rec78/1005/54.5/54.5/5 Oct 2013 749- i Panasonic GM1
Sony RX1«-79/1004/54.5/54.5/5 Sep 2012 2,799- i Sony RX1
Nikon D5300« »HiRec79/1004.5/54.5/54.5/5 Oct 2013 799- i Nikon D5300
Panasonic GM5« »Rec77/1005/55/54.5/5 Sep 2014 749- i Panasonic GM5
Panasonic LX100« »HiRec85/1005/54/55/5 Sep 2014 899 i i Panasonic LX100
Panasonic G6« »HiRec-5/5-4.5/5 Apr 2013 599- i Panasonic G6
Panasonic GF6« »HiRec-4.5/5-4.5/5 Apr 2013 499- i Panasonic GF6
Panasonic GX7« »Rec79/1005/54.5/55/5 Aug 2013 999- i Panasonic GX7
Panasonic G5« »HiRec-4.5/54.5/54.5/5 Jul 2012 599- i Panasonic G5
Panasonic GF5« »--4.5/54/54.5/5 Apr 2012 499- i Panasonic GF5
Panasonic GH3« »HiRec79/1004.5/55/54.5/5 Sep 2012 1,299- i Panasonic GH3
Panasonic G3« »HiRec75/1004.5/54.5/55/5 May 2011 599- i Panasonic G3
Ricoh GR« »-79/1004.5/54.5/54.5/5 Apr 2013 799- i Ricoh GR
Sony RX1R II« »-82/100-rev4.5/5 Oct 2015 3,299 i i Sony RX1R II
Sony A3000« »Rec-4/54.5/54/5 Aug 2013 329- i Sony A3000
Sony RX1R« »--4/5rev4.5/5 Jun 2013 2,799- i Sony RX1R
Sony NEX-7« »HiRec81/1004.5/55/55/5 Aug 2011 1,349- i Sony NEX-7

Care should be taken when interpreting the review scores above, 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 rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

Panasonic GM1:
Check Ebay offers
Sony RX1:
Check Ebay offers

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 use the search menu below. An 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 RX1

    Camera Specifications
    Camera Model Panasonic GM1 Sony RX1
    Camera Type Mirrorless system camera Fixed lens compact camera
    Camera Lens Micro Four Thirds lenses 35mm f/2.0
    Launch Date October 2013 September 2012
    Launch Price USD 749 USD 2799
    Sensor Specs
    Sensor Technology CMOS CMOS
    Sensor Format Four Thirds Sensor Full Frame Sensor
    Sensor Size 17.3 x 13.0 mm 35.8 x 13.0 mm
    Sensor Area 224.9 mm2 852.04 mm2
    Sensor Diagonal 21.6 mm 43 mm
    Crop Factor 2.0x 1.0x
    Sensor Resolution 15.8 Megapixels 24 Megapixels
    Image Resolution 4592 x 3448 pixels 6000 x 4000 pixels
    Pixel Pitch 3.77 μm 5.96 μm
    Pixel Density 7.04 MP/cm2 2.82 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 1080/60i Video 1080/60p Video
    ISO Setting 200-25600 ISO 100-25600 ISO
    ISO Boost 125-25600 ISO 50-102400 ISO
    Image Processor Venus IX BIONZ X
    DXO Sensor Quality (score) 66 93
    DXO Color Depth (bits) 22.3 25.1
    DXO Dynamic Range (EV) 11.7 14.3
    DXO Low Light (ISO) 660 2534
    Screen Specs
    Viewfinder Type No viewfinder Viewfinder optional
    LCD Framing Live View Live View
    Rear LCD Size 3.0 inch 3.0 inch
    LCD Resolution 1036k dots 1229k dots
    LCD Attachment Fixed screen Fixed screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs
    Autofocus System Contrast-detect AF Contrast-detect AF
    Maximum Shutter Speed 1/500s 1/4000s
    Continuous Shooting 5 shutter flaps/s 5 shutter flaps/s
    Silent ShootingElectronic Shutterno E-Shutter
    Fill Flash Build-in Flash Build-in Flash
    Storage Medium SDXC cards MS or SDXC cards
    Second Storage Option Single card slot Single card slot
    Connectivity Specs
    External Flash no Hotshoe Hotshoe
    USB Connector USB 2.0 USB 2.0
    HDMI Port micro HDMI mini HDMI
    Microphone Port no MIC socket External MIC port
    Wifi Support Wifi built-in no Wifi
    Body Specs
    Battery Type DMW-BLH7 power pack NP-BX1 power pack
    Battery Life (CIPA)230 shots per charge270 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)
    113 x 65 x 70 mm
    (4.4 x 2.6 x 2.8 in)
    Camera Weight 204 g (7.2 oz) 482 g (17.0 oz)

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