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Panasonic GX7 versus Sony RX100 III

The Panasonic Lumix DMC-GX7 and the Sony Cyber-shot DSC-RX100 III are two digital cameras that were announced, respectively, in August 2013 and May 2014. The GX7 is a mirrorless interchangeable lens camera, while the RX100 III is a fixed lens compact. The cameras are based on a Four Thirds (GX7) and an one-inch (RX100 III) sensor. The Panasonic has a resolution of 15.8 megapixel, whereas the Sony provides 20 MP. Read on to find out how these two cameras compare with respect to their size, their sensors, their features, and their reception by expert reviewers.

Body comparison: Panasonic GX7 vs Sony RX100 III

An illustration of the physical size and weight of the Panasonic GX7 and the Sony RX100 III 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 measures are rounded to the nearest millimeter. You can also toggle the display to switch to a percentage comparison if you prefer that the measures are being expressed in relative terms (in this case, the camera on the left side – the GX7 – represents the basis for the calculations across all the size and weight measures).

Compare Panasonic GX7 vs Sony RX100 III
Compare GX7 versus RX100 III top
Compare GX7 and RX100 III rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony RX100 III is considerably smaller (32 percent) than the Panasonic GX7. In this context, it is worth noting that neither the GX7 nor the RX100 III are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the RX100 III has a lens build in, whereas the GX7 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can find an overview of optics for the GX7 and their specifications in the Micro Four Thirds Lens Catalog.

Concerning battery life, the GX7 gets 350 shots out of its DMW-BLG10 battery, while the RX100 III can take 320 images on a single charge of its NP-BX1 power pack.

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 GX7» 4.8 in 2.8 in 2.2 in 14.2 oz 350 n Aug 2013 999- i Panasonic GX7
Sony RX100 III« 4.0 in 2.3 in 1.6 in 10.2 oz 320 n May 2014 799- i Sony RX100 III
Canon G5 X« » 4.4 in 3.0 in 1.7 in 12.5 oz 210 n Oct 2015 799 i i Canon G5 X
Canon G7 X« » 4.1 in 2.4 in 1.6 in 10.7 oz 210 n Sep 2014 699- i Canon G7 X
Olympus E-M10« » 4.7 in 3.2 in 1.8 in 14.0 oz 320 n Jan 2014 699- i Olympus E-M10
Olympus E-PL7« » 4.5 in 2.6 in 1.5 in 12.6 oz 350 n Aug 2014 599- i Olympus E-PL7
Olympus E-P5« » 4.8 in 2.7 in 1.5 in 14.8 oz 330 n May 2013 999- i Olympus E-P5
Panasonic GX9« » 4.9 in 2.8 in 1.9 in 14.4 oz 260 n Feb 2018 849 i i Panasonic GX9
Panasonic G85« » 5.0 in 3.5 in 2.9 in 17.8 oz 330 Y Sep 2016 899 i i Panasonic G85
Panasonic GX85« » 4.8 in 2.8 in 1.7 in 15.0 oz 290 n Apr 2016 799 i i Panasonic GX85
Panasonic GX8« » 5.2 in 3.1 in 2.5 in 17.2 oz 330 Y Jul 2015 1,199- i Panasonic GX8
Panasonic GM5« » 3.9 in 2.4 in 1.4 in 7.4 oz 220 n Sep 2014 749- i Panasonic GM5
Panasonic G6« » 4.8 in 3.3 in 2.8 in 13.8 oz 340 n Apr 2013 599- i Panasonic G6
Panasonic GX1« » 4.6 in 2.7 in 1.5 in 11.2 oz 320 n Nov 2011 949- i Panasonic GX1
Sony RX100 IV« » 4.0 in 2.3 in 1.6 in 10.5 oz 280 n Jun 2015 999- i Sony RX100 IV
Sony RX100 II« » 4.0 in 2.3 in 1.5 in 9.9 oz 350 n Jun 2013 749- i Sony RX100 II
Sony RX100« » 4.0 in 2.3 in 1.4 in 8.5 oz 330 n Jun 2012 649- i Sony RX100

The camera’s price is obviously a critical decision-making factor. 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 RX100 III was launched at a lower price than the GX7, despite having a lens build in. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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 GX7 vs Sony RX100 III

The size of the sensor inside a digital camera is one of the key determinants of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to isolate a subject from the background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Panasonic GX7 features a Four Thirds sensor and the Sony RX100 III an one-inch sensor. The sensor area in the RX100 III is 48 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 2.7. The sensor in the GX7 has a native 4:3 aspect ratio, while the one in the RX100 III offers a 3:2 aspect.

Panasonic GX7 and Sony RX100 III sensor measures

Despite having a smaller sensor, the RX100 III offers a higher resolution of 20 megapixel, compared with 15.8 MP of the GX7. This megapixel advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 2.41μm versus 3.77μm for the GX7). However, it should be noted that the RX100 III is a somewhat more recent model (by 9 months) than the GX7, and its sensor might have benefitted from technological advances during this time that partly offset its pixel-size disadvantage.

GX7 versus RX100 III MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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. The Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar image quality. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar 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 GX7» Four Thirds 15.8 4592 34481080/60p22.612.271870Panasonic GX7
Sony RX100 III« 1-inch 20.0 5472 36481080/60p22.412.349567Sony RX100 III
Canon G5 X« » 1-inch 20.0 5472 36481080/60p----Canon G5 X
Canon G7 X« » 1-inch 20.0 5472 36481080/60p23.012.755671Canon G7 X
Olympus E-M10« » Four Thirds 15.9 4608 34561080/30p22.812.388472Olympus E-M10
Olympus E-PL7« » Four Thirds 15.9 4608 34561080/30p22.712.487372Olympus E-PL7
Olympus E-P5« » Four Thirds 15.9 4608 34561080/30p22.812.489572Olympus E-P5
Panasonic GX9« » Four Thirds 20.2 5184 38884K/30p----Panasonic GX9
Panasonic G85« » Four Thirds 15.8 4592 34484K/30p22.812.565671Panasonic G85
Panasonic GX85« » Four Thirds 15.8 4592 34484K/30p22.912.666271Panasonic GX85
Panasonic GX8« » Four Thirds 20.2 5184 38884K/30p23.512.680675Panasonic GX8
Panasonic GM5« » Four Thirds 15.8 4592 34481080/60p22.111.772166Panasonic GM5
Panasonic G6« » Four Thirds 15.9 4608 34561080/60p21.311.563961Panasonic G6
Panasonic GX1« » Four Thirds 15.8 4592 34481080/60p20.810.670355Panasonic GX1
Sony RX100 IV« » 1-inch 20.0 5472 36484K/30p22.812.659170Sony RX100 IV
Sony RX100 II« » 1-inch 20.0 5472 36481080/60p22.512.448367Sony RX100 II
Sony RX100« » 1-inch 20.0 5472 36481080/60p22.612.439066Sony RX100

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, and both provide the same movie specifications (1080/60p).

 

Feature comparison: Panasonic GX7 vs Sony RX100 III

Beyond body and sensor, cameras can and do differ across a range of features. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the GX7 offers a substantially higher resolution than the one in the RX100 III (2760k vs 1440k dots). The adjacent table lists some of the other core features of the Panasonic GX7 and Sony RX100 III along with similar information for a selection of comparators. The full specs-sheets can be found in the camera manual or in the dpreview camera hub.

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)
Build-in
Flash
(yes/no)
Build-in
Image
Stab
Camera
Model
Panasonic GX7»2760 n 3.0 1040 tilting Y 8000 5.0 Y Y Panasonic GX7
Sony RX100 III«1440 n 3.0 1229 tilting n 2000 10.0 Y Y Sony RX100 III
Canon G5 X« »2360 n 3.0 1040 swivel Y 2000 5.9 Y Y Canon G5 X
Canon G7 X« »- n 3.0 1040 tilting Y 2000 6.5 Y Y Canon G7 X
Olympus E-M10« »1440 n 3.0 1037 tilting Y 4000 8.0 Y Y Olympus E-M10
Olympus E-PL7« »- n 3.0 1037 tilting Y 4000 8.0 n Y Olympus E-PL7
Olympus E-P5« »- n 3.0 1037 tilting Y 8000 9.0 Y Y Olympus E-P5
Panasonic GX9« »2760 n 3.0 1240 tilting Y 4000 9.0 Y Y Panasonic GX9
Panasonic G85« »2360 n 3.0 1040 swivel Y 4000 9.0 Y Y Panasonic G85
Panasonic GX85« »2765 n 3.0 1040 tilting Y 4000 8.0 Y Y Panasonic GX85
Panasonic GX8« »2360 n 3.0 1040 swivel Y 8000 10.0 n Y Panasonic GX8
Panasonic GM5« »1166 n 3.0 921 fixed Y 500 5.8 n n Panasonic GM5
Panasonic G6« »1440 n 3.0 1036 swivel Y 4000 7.0 Y n Panasonic G6
Panasonic GX1« »- n 3.0 460 fixed Y 4000 4.2 Y n Panasonic GX1
Sony RX100 IV« »2359 n 3.0 1228 tilting n 2000 16.0 Y Y Sony RX100 IV
Sony RX100 II« »- n 3.0 1229 tilting n 2000 10.0 Y Y Sony RX100 II
Sony RX100« »- n 3.0 1229 fixed n 2000 10.0 Y Y Sony RX100

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The GX7 has a touchscreen, while the RX100 III 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 GX7 features an electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (rolling shutter) or shooting under artificial light sources (flickering).

The GX7 writes its imaging data to SDXC cards, while the RX100 III uses SDXC or Memory Stick PRO Duo cards.

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 GX7»Ystereomono--mini2.0YY-Panasonic GX7
Sony RX100 III«-stereomono--micro2.0YY-Sony RX100 III
Canon G5 X« »Ystereomono--mini2.0YY-Canon G5 X
Canon G7 X« »-stereomono--micro2.0YY-Canon G7 X
Olympus E-M10« »Ystereomono--micro2.0Y--Olympus E-M10
Olympus E-PL7« »Ystereomono--micro2.0Y--Olympus E-PL7
Olympus E-P5« »Ystereomono--micro2.0Y--Olympus E-P5
Panasonic GX9« »Ystereomono--micro2.0Y-YPanasonic GX9
Panasonic G85« »YstereomonoY-micro2.0Y--Panasonic G85
Panasonic GX85« »Ystereomono--micro2.0YY-Panasonic GX85
Panasonic GX8« »YstereomonoY-micro2.0YY-Panasonic GX8
Panasonic GM5« »Ystereomono--micro2.0Y--Panasonic GM5
Panasonic G6« »YstereomonoY-mini2.0YY-Panasonic G6
Panasonic GX1« »Ystereomono--mini2.0---Panasonic GX1
Sony RX100 IV« »-stereomono--micro2.0YY-Sony RX100 IV
Sony RX100 II« »Ystereomono--micro2.0YY-Sony RX100 II
Sony RX100« »-stereomono--micro2.0---Sony RX100

Both the GX7 and the RX100 III have been discontinued, but can regularly be found used on eBay. The GX7 was replaced by the Panasonic GX85, while the RX100 III was followed by the Sony RX100 IV.

Review summary: Panasonic GX7 vs Sony RX100 III

So how do things add up? Is there a clear favorite between the Panasonic GX7 and the Sony RX100 III? The listing below highlights the relative strengths of the two models.

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Arguments in favor of the Panasonic Lumix DMC-GX7:

  • Better low-light sensitivity: Requires less light for good images (0.5 stops ISO advantage).
  • More detailed viewfinder: Has higher resolution electronic viewfinder (2760k vs 1440k dots).
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 2000/sec) to freeze action.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More flexible: Accepts interchangeable lenses, so that lens characteristics can be altered.
  • 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 August 2013).

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Advantages of the Sony Cyber-shot DSC-RX100 III:

  • More detail: Has more megapixels (20 vs 15.8MP), which boosts linear resolution by 15%.
  • More detailed LCD: Has a higher resolution rear screen (1229k vs 1040k dots).
  • Faster burst: Shoots at higher frequency (10 vs 5 flaps/sec) to capture the decisive moment.
  • Ready to shoot: Has an integrated lens, whereas the GX7 necessitates an extra lens.
  • More compact: Is smaller (102x58mm vs 123x71mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight even though it has a lens build in (unlike the GX7).
  • More affordable: Was introduced at a lower price, despite coming with a build-in lens.
  • More modern: Was introduced somewhat (9 months) more recently.

If the number of relative strengths (bullet points above) is taken as a guide, the match-up finishes in a tie (8 points each). 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.

GX7 08:08 RX100 III

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains incomplete and does no justice, for example, to the way the GX7 or the RX100 III handle or 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. This is where reviews by experts come in. The table below summarizes the assessments of some of the best known camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). The full reviews are available 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 GX7»Rec79/1005/54.5/55/5 Aug 2013 999- i Panasonic GX7
Sony RX100 III«HiRec82/1004.5/54.5/55/5 May 2014 799- i Sony RX100 III
Canon G5 X« »HiRec78/1004.5/54/54.5/5 Oct 2015 799 i i Canon G5 X
Canon G7 X« »HiRec77/1004.5/53.5/54.5/5 Sep 2014 699- i Canon G7 X
Olympus E-M10« »-80/1005/54.5/55/5 Jan 2014 699- i Olympus E-M10
Olympus E-PL7« »Rec-5/54.5/54/5 Aug 2014 599- i Olympus E-PL7
Olympus E-P5« »HiRec78/1004.5/54.5/55/5 May 2013 999- i Olympus E-P5
Panasonic GX9« »Rec84/1004.5/54.5/54.5/5 Feb 2018 849 i i Panasonic GX9
Panasonic G85« »HiRec84/1005/54.5/54.5/5 Sep 2016 899 i i Panasonic G85
Panasonic GX85« »HiRec82/1005/54.5/55/5 Apr 2016 799 i i Panasonic GX85
Panasonic GX8« »Rec82/1004.5/55/54.5/5 Jul 2015 1,199- i Panasonic GX8
Panasonic GM5« »Rec77/1005/55/54.5/5 Sep 2014 749- i Panasonic GM5
Panasonic G6« »HiRec-5/5-4.5/5 Apr 2013 599- i Panasonic G6
Panasonic GX1« »Rec77/1004.5/54.5/54.5/5 Nov 2011 949- i Panasonic GX1
Sony RX100 IV« »HiRec85/1004/54.5/54.5/5 Jun 2015 999- i Sony RX100 IV
Sony RX100 II« »HiRec79/1004.5/55/54.5/5 Jun 2013 749- i Sony RX100 II
Sony RX100« »HiRec78/1004/55/55/5 Jun 2012 649- i Sony RX100

The above review scores should be interpreted with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. 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, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

 

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. If the camera you are interested in is not available, kindly get in touch, and I will try to locate and add the respective data to the application.

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