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Panasonic GX850 versus Panasonic GM1

The Panasonic Lumix DMC-GX850 (called Panasonic GX800 in some regions) and the Panasonic Lumix DMC-GM1 are two digital cameras that were officially introduced, respectively, in January 2017 and October 2013. Both the GX850 and the GM1 are mirrorless interchangeable lens cameras that are equipped with a Four Thirds sensor. Both cameras offer a resolution of 15.8 megapixel. 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 GX850 vs Panasonic GM1

The side-by-side display below illustrates the physical size and weight of the Panasonic GX850 and the Panasonic GM1. 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 GX850 – represents 100 percent across all the size and weight measures).

Snapsort Panasonic GX850 vs Panasonic GM1
Compare GX850 versus GM1 top
Compare GX850 and GM1 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic GM1 is notably smaller (22 percent) than the Panasonic GX850. Moreover, the GM1 is markedly lighter (24 percent) than the GX850. In this context, it is worth noting that neither the GX850 nor the GM1 are weather-sealed.

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 find an overview of suitable optics 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.

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 camera comparisons there.

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)
Panasonic GX850» 4.2 in 2.6 in 1.3 in 9.5 oz 210 n Jan 2017 549 i i
Panasonic GM1« 3.9 in 2.2 in 1.2 in 7.2 oz 230 n Oct 2013 749- i
Canon G1 X Mark II« » 4.6 in 2.9 in 2.6 in 19.5 oz 240 n Feb 2014 799 i i
Olympus E-M10« » 4.7 in 3.2 in 1.8 in 14.0 oz 320 n Jan 2014 699- i
Panasonic G7« » 4.9 in 3.4 in 3.0 in 14.5 oz 350 n May 2015 649- i
Panasonic GF7« » 4.2 in 2.6 in 1.3 in 9.4 oz 230 n Jan 2015 499- i
Panasonic GM5« » 3.9 in 2.4 in 1.4 in 7.4 oz 220 n Sep 2014 749- i
Panasonic GF6« » 4.4 in 2.6 in 1.5 in 11.4 oz 340 n Apr 2013 499- i
Panasonic G6« » 4.8 in 3.3 in 2.8 in 13.8 oz 340 n Apr 2013 599- i
Panasonic GF5« » 4.3 in 2.6 in 1.5 in 9.4 oz 360 n Apr 2012 499- i
Panasonic G5« » 4.7 in 3.3 in 2.8 in 14.0 oz 320 n Jul 2012 599- i
Panasonic GF3« » 4.3 in 2.6 in 1.3 in 9.3 oz 300 n Jun 2011 549- i
Panasonic G3« » 4.5 in 3.3 in 1.9 in 11.9 oz 270 n May 2011 599- i
Panasonic GX1« » 4.6 in 2.7 in 1.5 in 11.2 oz 320 n Nov 2011 949- i
Panasonic GF2« » 4.4 in 2.7 in 1.3 in 10.9 oz 300 n Nov 2010 549- i
Ricoh GR« » 4.6 in 2.4 in 1.4 in 8.6 oz 290 n Apr 2013 799- i

The price is, of course, an important factor in any camera decision. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The GX850 was launched at a markedly lower price (by 27 percent) than the GM1, 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: Panasonic GX850 vs Panasonic GM1

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 tend to be more expensive and 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 GX850 and Panasonic GM1 sensor measures

The two cameras under review do not only share the same sensor size, but also offer an identical resolution of 15.8 megapixel. This similarity in sensor specs implies that both the GX850 and the GM1 have the same pixel density, as well as the same pixel size. It should, however, be noted that the GX850 is much more recent (by 3 years and 2 months) than the GM1, and its sensor will have benefitted from technological advances during this time. Coming back to sensor resolution, it should be mentioned that the GX850 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

GX850 versus GM1 MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 review, the GX850 has a notably higher overall DXO score than the GM1 (overall score 7 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 0.9 bits higher color depth, 1.6 EV in additional dynamic range, 0.2 stops of reduced low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

Sensor Characteristics
  Camera Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Panasonic GX850» Four Thirds 15.8 4592 34484K/30p23.213.358673
Panasonic GM1« Four Thirds 15.8 4592 34481080/60i22.311.766066
Canon G1 X Mark II« » 1.5-inch 13.0 4160 31201080/30p21.510.858158
Olympus E-M10« » Four Thirds 15.9 4608 34561080/30p22.812.388472
Panasonic G7« » Four Thirds 15.8 4592 34484K/30p----
Panasonic GF7« » Four Thirds 15.8 4592 34481080/60p----
Panasonic GM5« » Four Thirds 15.8 4592 34481080/60p22.111.772166
Panasonic GF6« » Four Thirds 15.8 4592 34481080/60i20.710.662254
Panasonic G6« » Four Thirds 15.9 4608 34561080/60p21.311.563961
Panasonic GF5« » Four Thirds 12.0 4000 30001080/60i21.411.661861
Panasonic G5« » Four Thirds 15.9 4608 34561080/60p----
Panasonic GF3« » Four Thirds 12.0 4000 30001080/60i20.610.045849
Panasonic G3« » Four Thirds 15.8 4592 34481080/60i21.010.666756
Panasonic GX1« » Four Thirds 15.8 4592 34481080/60p20.810.670355
Panasonic GF2« » Four Thirds 12.0 4000 30001080/60i21.210.350654
Ricoh GR« » APS-C 16.1 4928 32641080/30p23.613.597278

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 GX850 provides a higher video resolution than the GM1. It can shoot video footage at 4K/30p, while the GM1 is limited to 1080/60i.

 

Feature comparison: Panasonic GX850 vs Panasonic GM1

Apart from body and sensor, cameras can and do differ across a variety of features. The GX850 and the GM1 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. The adjacent table lists some of the other core features of the Panasonic GX850 and Panasonic GM1 along with similar information for a selection of comparators. The full specs-sheets can be found in the camera manual or, for example, in the dpreview camera hub.

Core Features
  Camera 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
Panasonic GX850»- n 3.0 1040 tilting Y 500 10.0 Y n
Panasonic GM1«- n 3.0 1036 fixed Y 500 5.0 Y n
Canon G1 X Mark II« »- n 3.0 1040 tilting Y 4000 5.2 Y Y
Olympus E-M10« »1440 n 3.0 1037 tilting Y 4000 8.0 Y Y
Panasonic G7« »2360 n 3.0 1040 swivel Y 4000 7.0 Y n
Panasonic GF7« »- n 3.0 1040 tilting Y 500 5.8 Y n
Panasonic GM5« »1166 n 3.0 921 fixed Y 500 5.8 n n
Panasonic GF6« »- n 3.0 1040 tilting Y 4000 4.2 Y n
Panasonic G6« »1440 n 3.0 1036 swivel Y 4000 7.0 Y n
Panasonic GF5« »- n 3.0 920 fixed Y 4000 4.0 Y n
Panasonic G5« »1440 n 3.0 920 swivel Y 4000 6.0 Y n
Panasonic GF3« »- n 3.0 460 fixed Y 4000 3.2 Y n
Panasonic G3« »1440 n 3.0 460 swivel Y 4000 4.0 Y n
Panasonic GX1« »- n 3.0 460 fixed Y 4000 4.2 Y n
Panasonic GF2« »- n 3.0 460 fixed Y 4000 2.6 Y n
Ricoh GR« »- n 3.0 1230 fixed n 4000 4.0 Y n

The GX850 is a current model that online retailers, such as amazon, will have in stock. In contrast, the GM1 has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the GM1 was succeeded by the Panasonic GM5.

Review summary: Panasonic GX850 vs Panasonic GM1

So how do things add up? Is there a clear favorite between the Panasonic GX850 and the Panasonic GM1? A synthesis of the relative strong points of each of the models is listed below.


Arguments in favor of the Panasonic Lumix DMC-GX850:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores markedly higher (7 points) in the DXO overall assessment.
  • More dynamic range: Captures a larger spectrum of light and dark details (1.6 EV of extra DR).
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60i).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Faster burst: Shoots at higher frequency (10 vs 5 flaps/sec) to capture the decisive moment.
  • More affordable: Was introduced into a lower priced category (27 percent cheaper at launch).
  • More modern: Reflects 3 years and 2 months of technical progress since the GM1 launch.


Advantages of the Panasonic Lumix DMC-GM1:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • More compact: Is smaller (99x55mm vs 107x65mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 65g or 24 percent) and is thus easier to take along.
  • More heavily discounted: Has been around for much longer (launched in October 2013).

If the count of individual advantages (bullet points above) is taken as a guide, the GX850 is the clear winner of the match-up (8 : 4 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.

GX850 08:04 GM1

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 GX850 or the GM1 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 why hands-on reviews by experts are important. The table below summarizes the assessments of some of the best known 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 cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Panasonic GX850»Rec76/1004.5/54/54.5/5 Jan 2017 549 i i
Panasonic GM1«Rec78/1005/54.5/54.5/5 Oct 2013 749- i
Canon G1 X Mark II« »Rec77/1004/54/54.5/5 Feb 2014 799 i i
Olympus E-M10« »-80/1005/54.5/55/5 Jan 2014 699- i
Panasonic G7« »HiRec80/1005/54.5/54.5/5 May 2015 649- i
Panasonic GF7« »Rec-4.5/54.5/54.5/5 Jan 2015 499- i
Panasonic GM5« »Rec77/1005/55/54.5/5 Sep 2014 749- i
Panasonic GF6« »HiRec-4.5/5-4.5/5 Apr 2013 499- i
Panasonic G6« »HiRec-5/5-4.5/5 Apr 2013 599- i
Panasonic GF5« »--4.5/54/54.5/5 Apr 2012 499- i
Panasonic G5« »HiRec-4.5/54.5/54.5/5 Jul 2012 599- i
Panasonic GF3« »82/10071/1004.5/54.5/54/5 Jun 2011 549- i
Panasonic G3« »HiRec75/1004.5/54.5/55/5 May 2011 599- i
Panasonic GX1« »Rec77/1004.5/54.5/54.5/5 Nov 2011 949- i
Panasonic GF2« »82/10070/1004.5/54.5/54.5/5 Nov 2010 549- i
Ricoh GR« »-79/1004.5/54.5/54.5/5 Apr 2013 799- i

The above review scores should be interpreted with care, though. The ratings are only valid when refering to cameras in the same category and of the same age. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. 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? If you would like to see a different side-by-side camera review, just use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored. If the camera you are interested in is not available, please send me an email, and I will try to update the database with the necessary infos.

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