Panasonic GX85 versus Canon G1 X Mark III

The Panasonic Lumix DMC-GX85 (called Panasonic GX80 in some regions) and the Canon PowerShot G1 X Mark III are two digital cameras that were announced, respectively, in April 2016 and October 2017. The GX85 is a mirrorless interchangeable lens camera, while the G1X Mark III is a fixed lens compact. The cameras are based on a Four Thirds (GX85) and an APS-C sensor. The Panasonic has a resolution of 15.8 megapixel, whereas the Canon provides 24 MP.

Body comparison

The physical size and weight of the Panasonic GX85 and the Canon G1 X Mark III are illustrated in the side-by-side display below. Three successive views from the front, the top, and the rear are shown. All size dimensions 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 – the GX85 – represents the basis or 100 percent across all the size and weight measures).

Panasonic GX85 vs Canon G1 X Mark III front
GX85 versus G1X Mark III top view
GX85 and G1X Mark III rear side
Body view (GX85 on the left)

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon G1 X Mark III is somewhat larger (4 percent) than the Panasonic GX85. Cameras intended for semi-professional or professional use tend to be a bit bulkier in order to give them the necessary ruggedness. It is noteworthy in this context that the G1X Mark III is splash and dust-proof, while the GX85 does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the G1X Mark III has a lens build in, whereas the GX85 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 GX85 and their specifications in the Micro Four Thirds Lens Catalog.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you want to switch the focus of the display and review another camera pair, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible comparisons there.

Camera Body Specifications
Camera Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(y/n)
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Panasonic GX85 (⇒ rgt) 4.8 in 2.8 in 1.7 in 15.0 oz 290 no 2016 799 latest check
Canon G1 X Mark III (⇒ lft) 4.5 in 3.1 in 2.0 in 14.1 oz 200 YES 2017 1,299 latest check
Canon 6D Mark II (⇒ lft | rgt) 5.7 in 4.4 in 3.0 in 27.0 oz 1200 YES 2017 1,999 latest check
Canon 80D (⇒ lft | rgt) 5.5 in 4.1 in 3.1 in 25.8 oz 960 YES 2016 1,199 latest check
Canon 1D X Mark II (⇒ lft | rgt) 6.2 in 6.6 in 3.3 in 54.0 oz 1210 YES 2016 5,999 latest check
Nikon D7500 (⇒ lft | rgt) 5.4 in 4.1 in 2.9 in 25.4 oz 950 YES 2017 1,299 latest check
Olympus E-M10 III (⇒ lft | rgt) 4.8 in 3.3 in 2.0 in 14.5 oz 330 no 2017 649 latest check
Olympus PEN-F (⇒ lft | rgt) 4.9 in 2.8 in 1.5 in 15.1 oz 330 no 2016 1,199 latest check
Olympus E-M10 II (⇒ lft | rgt) 4.7 in 3.3 in 1.9 in 13.8 oz 320 no 2015 799discont. check
Olympus E-M10 (⇒ lft | rgt) 4.7 in 3.2 in 1.8 in 14.0 oz 320 no 2014 699discont. check
Panasonic GH5 (⇒ lft | rgt) 5.5 in 3.9 in 3.4 in 25.6 oz 410 YES 2017 1,999 latest check
Panasonic G85 (⇒ lft | rgt) 5.0 in 3.5 in 2.9 in 17.8 oz 330 YES 2016 899 latest check
Panasonic ZS100 (⇒ lft | rgt) 4.4 in 2.6 in 1.7 in 11.0 oz 300 no 2016 699 latest check
Panasonic GM5 (⇒ lft | rgt) 3.9 in 2.4 in 1.4 in 7.4 oz 220 no 2014 749discont. check
Panasonic GM1 (⇒ lft | rgt) 3.9 in 2.2 in 1.2 in 7.2 oz 230 no 2013 749discont. check
Panasonic GX7 (⇒ lft | rgt) 4.8 in 2.8 in 2.2 in 14.2 oz 350 no 2013 999discont. check
Sony RX10 III (⇒ lft | rgt) 5.2 in 3.7 in 5.0 in 37.1 oz 420 YES 2016 1,499discont. check

The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. 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. 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 tend to be associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Panasonic GX85 features a Four Thirds sensor and the Canon G1 X Mark III an APS-C sensor. The sensor area in the G1X Mark III is 48 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.5. The sensor in the GX85 has a native 4:3 aspect ratio, while the one in the G1X Mark III offers a 3:2 aspect.

Panasonic GX85 and Canon G1 X Mark III sensor measures
Sensor size

With 24MP, the G1X Mark III offers a higher resolution than the GX85 (15.8MP), but the G1X Mark III has marginally smaller individual pixels (pixel pitch of 3.72μm versus 3.77μm for the GX85). Yet, the G1X Mark III is a somewhat more recent model (by 1 year and 6 months) than the GX85, and its sensor might 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 GX85 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

GX85 versus G1X Mark III MP
Sensor resolution

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. 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 Sensor
Class
Resolution
(Megapixel)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Panasonic GX85 (⇒ rgt) Four Thirds 15.8 4592 3448 4K/30p 22.9 12.6 662 71
Canon G1 X Mark III (⇒ lft) APS-C 24.0 6000 4000 1080/60p .. .. .. ..
Canon 6D Mark II (⇒ lft | rgt) Full Frame 26.0 6240 4160 1080/60p 24.4 11.9 2862 85
Canon 80D (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 23.6 13.2 1135 79
Canon 1D X Mark II (⇒ lft | rgt) Full Frame 20.0 5472 3648 4K/60p 24.1 13.5 3207 88
Nikon D7500 (⇒ lft | rgt) APS-C 20.7 5568 3712 4K/30p 24.8 13.9 1192 86
Olympus E-M10 III (⇒ lft | rgt) Four Thirds 15.9 4608 3456 4K/30p .. .. .. ..
Olympus PEN-F (⇒ lft | rgt) Four Thirds 20.2 5184 3888 1080/60p 23.1 12.4 894 74
Olympus E-M10 II (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/60p 23.1 12.5 842 73
Olympus E-M10 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/30p 22.8 12.3 884 72
Panasonic GH5 (⇒ lft | rgt) Four Thirds 20.2 5184 3888 4K/60p 23.9 13.0 807 77
Panasonic G85 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 4K/30p 22.8 12.5 656 71
Panasonic ZS100 (⇒ lft | rgt) 1-inch 20.0 5472 3648 4K/30p 22.8 12.5 559 70
Panasonic GM5 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60p 22.1 11.7 721 66
Panasonic GM1 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60i 22.3 11.7 660 66
Panasonic GX7 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60p 22.6 12.2 718 70
Sony RX10 III (⇒ lft | rgt) 1-inch 20.0 5472 3648 4K/30p 23.1 12.6 472 70

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 GX85 provides a higher video resolution than the G1X Mark III. It can shoot video footage at 4K/30p, while the Canon is limited to 1080/60p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the GX85 offers a higher resolution than the one in the G1X Mark III (2765k vs 2360k dots). The table below summarizes some of the other core capabilities of the Panasonic GX85 and Canon G1 X Mark III in connection with corresponding information for a sample of similar cameras. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.

Core Features
Camera Viewfinder
(Type or
'000 dots)
Control
Panel
(Y/n)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(Y/n)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec))
Build-in
Flash
(GN)
Build-in
Image
Stab
Panasonic GX85 (⇒ rgt) 2765 no 3.0 1040 tilting YES 4000 8.0 6 YES
Canon G1 X Mark III (⇒ lft) 2360 no 3.0 1040 swivel YES 2000 9.0 9 no
Canon 6D Mark II (⇒ lft | rgt) optical YES 3.0 1040 swivel YES 4000 6.5 no no
Canon 80D (⇒ lft | rgt) optical YES 3.0 1040 swivel YES 8000 7.0 12 no
Canon 1D X Mark II (⇒ lft | rgt) optical YES 3.2 1620 fixed YES 8000 16.0 no no
Nikon D7500 (⇒ lft | rgt) optical YES 3.2 922 tilting YES 8000 8.0 12 no
Olympus E-M10 III (⇒ lft | rgt) 2360 no 3.0 1040 tilting YES 4000 8.6 5.8 YES
Olympus PEN-F (⇒ lft | rgt) 2360 no 3.0 1037 swivel YES 8000 10.0 no YES
Olympus E-M10 II (⇒ lft | rgt) 2360 no 3.0 1040 tilting YES 4000 8.0 5.8 YES
Olympus E-M10 (⇒ lft | rgt) 1440 no 3.0 1037 tilting YES 4000 8.0 5.8 YES
Panasonic GH5 (⇒ lft | rgt) 3680 no 3.2 1620 swivel YES 8000 12.0 no YES
Panasonic G85 (⇒ lft | rgt) 2360 no 3.0 1040 swivel YES 4000 9.0 6.2 YES
Panasonic ZS100 (⇒ lft | rgt) 1166 no 3.0 1040 fixed YES 2000 10.0 YES YES
Panasonic GM5 (⇒ lft | rgt) 1166 no 3.0 921 fixed YES 500 5.8 no no
Panasonic GM1 (⇒ lft | rgt) no no 3.0 1036 fixed YES 500 5.0 4 no
Panasonic GX7 (⇒ lft | rgt) 2760 no 3.0 1040 tilting YES 8000 5.0 7 YES
Sony RX10 III (⇒ lft | rgt) 2359 YES 3.0 1229 tilting no 2000 14.0 10.8 no

Both the GX85 and the G1X Mark III are current models that good online retailers will have in stock. You can check the latest prices, for example, at amazon. The GX85 replaced the earlier Panasonic GX7, while the G1X Mark III followed on from the Canon G1 X Mark II.

Summary

So how do things add up? Which of the two cameras – the Panasonic GX85 or the Canon G1 X Mark III – has the upper hand? The listing below highlights the relative strengths of the two models.


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Advantages of the Panasonic Lumix DMC-GX85:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
  • More detailed viewfinder: Has a higher resolution electronic viewfinder (2765k vs 2360k dots).
  • Faster shutter: Has a higher mechanical shutter speed (4000/sec vs 2000/sec) to freeze action.
  • More flexible: Accepts interchangeable lenses, so that lens characteristics can be altered.
  • Longer lasting: Can take more shots (290 versus 200) on a single battery charge.
  • Sharper images: Has hand-shake reducing image stabilization build-in.
  • More heavily discounted: Has been on the market for longer (launched in April 2016).

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Arguments in favor of the Canon PowerShot G1 X Mark III:

  • More detail: Has more megapixels (24 vs 15.8MP), which boosts linear resolution by 26%.
  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better image quality: Is equipped with a larger and more technologically advanced sensor.
  • More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
  • Ready to shoot: Has an integrated lens, whereas the GX85 necessitates an extra lens.
  • Less heavy: Has a lower weight even though it has a lens build in (unlike the GX85).
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • More modern: Was introduced somewhat (1 year and 6 months) more recently.

If the count of individual advantages (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.

GX85 08:08 G1X Mark III

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the handling experience and imaging performance when actually working with the GX85 or the G1X Mark III. 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. This is where reviews by experts come in. The following table reports the overall rankings of the cameras as published by some of the major camera review sites. The full reviews are available, respectively, at cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.

Review scores
Camera camera
labs
dp
review
ephoto
zine
imaging
resource
photography
blog
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Panasonic GX85 (⇒ rgt) HiRec 82/100 Silver 5/5 4.5/5 5/5 2016 799 latest check
Canon G1 X Mark III (⇒ lft) .. .. .. .. .. 2017 1,299 latest check
Canon 6D Mark II (⇒ lft | rgt) Rec 80/100 4.5/5 4/5 4/5 2017 1,999 latest check
Canon 80D (⇒ lft | rgt) HiRec 84/100 Silver 4.5/5 4.5/5 4.5/5 2016 1,199 latest check
Canon 1D X Mark II (⇒ lft | rgt) - 89/100 Gold 4.5/5 5/5 4.5/5 2016 5,999 latest check
Nikon D7500 (⇒ lft | rgt) HiRec 86/100 Silver 5/5 4.5/5 4.5/5 2017 1,299 latest check
Olympus E-M10 III (⇒ lft | rgt) Rec 80/100 4.5/5 .. 4.5/5 2017 649 latest check
Olympus PEN-F (⇒ lft | rgt) - 82/100 Silver 4.5/5 4.5/5 5/5 2016 1,199 latest check
Olympus E-M10 II (⇒ lft | rgt) HiRec 80/100 Silver 5/5 5/5 5/5 2015 799discont. check
Olympus E-M10 (⇒ lft | rgt) - 80/100 Gold 5/5 4.5/5 5/5 2014 699discont. check
Panasonic GH5 (⇒ lft | rgt) HiRec 85/100 Gold 4.5/5 5/5 5/5 2017 1,999 latest check
Panasonic G85 (⇒ lft | rgt) HiRec 84/100 Gold 5/5 4.5/5 4.5/5 2016 899 latest check
Panasonic ZS100 (⇒ lft | rgt) HiRec 82/100 Gold 4.5/5 4/5 4.5/5 2016 699 latest check
Panasonic GM5 (⇒ lft | rgt) Rec 77/100 Silver 5/5 5/5 4.5/5 2014 749discont. check
Panasonic GM1 (⇒ lft | rgt) Rec 78/100 Gold 5/5 4.5/5 4.5/5 2013 749discont. check
Panasonic GX7 (⇒ lft | rgt) Rec 79/100 Silver 5/5 4.5/5 5/5 2013 999discont. check
Sony RX10 III (⇒ lft | rgt) Rec 84/100 Silver 4.5/5 4.5/5 4.5/5 2016 1,499discont. check

The above review scores should be interpreted 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. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

Other comparisons

In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored. If you do not see the camera that you are looking for, please send me an email, and I will try to update the database with the necessary infos.

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