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Canon 1D Mark III versus Panasonic GX800

The Canon EOS-1D Mark III and the Panasonic Lumix DMC-GX800 (labelled Panasonic GX850 in some countries) are two digital cameras that were revealed to the public, respectively, in February 2007 and January 2017. The 1D Mark III is a DSLR, while the GX800 is a mirrorless interchangeable lens camera. The cameras are based on an APS-H (1D Mark III) and a Four Thirds (GX800) sensor. The Canon has a resolution of 10.1 megapixel, whereas the Panasonic provides 15.8 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: Canon 1D Mark III vs Panasonic GX800

The physical size and weight of the Canon 1D Mark III and the Panasonic GX800 are illustrated 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 use the toggle button 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 1D Mark III – represents the basis or 100 percent across all the size and weight measures).

Compare Canon 1D Mark III vs Panasonic GX800
Compare 1D Mark III versus GX800 top
Compare 1D Mark III and GX800 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic GX800 is considerably smaller (72 percent) than the Canon 1D Mark III. Moreover, the GX800 is substantially lighter (77 percent) than the 1D Mark III. It is worth mentioning in this context that the 1D Mark III is splash and dust resistant, while the GX800 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 find an overview of optics for the two cameras in the Canon EF Lens Catalog (1D Mark III) and the Micro Four Thirds Lens Catalog (GX800). Mirrorless cameras, such as the GX800, have moreover the advantage that they can use many lenses from other systems via adapters, as they have a relatively short flange to focal plane distance.

Concerning battery life, the 1D Mark III gets 2200 shots out of its LP-E4 battery, while the GX800 can take 210 images on a single charge of its DMW-BLH7 power pack. As can be seen in the images above, the 1D Mark III has a battery grip build in. This facilitates image-taking in portrait orientation and gives it additional battery power.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you would like to visualize and compare a different camera combination, just use the right or left arrows in the table to switch to the respective camera. Alternatively, you can also navigate to the CAM-parator app and make your selection from the full list of cameras 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)
Camera
Model
Canon 1D Mark III» 6.1 in 6.2 in 3.1 in 40.7 oz 2200 Y Feb 2007 4,499- i Canon 1D Mark III
Panasonic GX800« 4.2 in 2.6 in 1.3 in 9.5 oz 210 n Jan 2017 549 i i Panasonic GX800
Canon 5DS R« » 6.0 in 4.6 in 3.0 in 32.8 oz 700 Y Feb 2015 3,699 i i Canon 5DS R
Canon M10« » 4.3 in 2.6 in 1.4 in 10.6 oz 255 n Oct 2015 499- i Canon M10
Canon 5D Mark III« » 6.0 in 4.6 in 3.0 in 33.5 oz 950 Y Mar 2012 3,499- i Canon 5D Mark III
Canon 1D Mark IV« » 6.1 in 6.2 in 3.1 in 43.4 oz 1500 Y Oct 2009 4,999- i Canon 1D Mark IV
Canon 5D Mark II« » 6.0 in 4.5 in 3.0 in 30.0 oz 850 Y Sep 2008 3,499- i Canon 5D Mark II
Canon 1Ds Mark III« » 5.9 in 6.3 in 3.1 in 48.9 oz 1800 Y Aug 2007 7,999- i Canon 1Ds Mark III
Canon 1D Mark II N« » 6.1 in 6.2 in 3.1 in 55.2 oz 1200 Y Aug 2005 3,999- i Canon 1D Mark II N
Canon 1D Mark II« » 6.1 in 6.2 in 3.1 in 54.1 oz 1200 Y Jan 2004 4,499- i Canon 1D Mark II
Canon 1Ds« » 6.1 in 6.2 in 3.1 in 44.6 oz 600 Y Sep 2002 8,999- i Canon 1Ds
Nikon D3« » 6.3 in 6.2 in 3.5 in 45.9 oz 4300 Y Aug 2007 4,999- i Nikon D3
Nikon D2Xs« » 6.2 in 5.9 in 3.4 in 44.2 oz 3800 Y Jun 2006 4,699- i Nikon D2Xs
Panasonic GF7« » 4.2 in 2.6 in 1.3 in 9.4 oz 230 n Jan 2015 499- i Panasonic GF7
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 GF5« » 4.3 in 2.6 in 1.5 in 9.4 oz 360 n Apr 2012 499- i Panasonic GF5

The price is, of course, an important factor in any camera decision. 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. The GX800 was launched at a markedly lower price (by 88 percent) than the 1D Mark III, which puts it into a different market segment. 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: Canon 1D Mark III vs Panasonic GX800

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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 Canon 1D Mark III features an APS-H sensor and the Panasonic GX800 a Four Thirds sensor. The sensor area in the GX800 is 57 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.3 and 2.0. The sensor in the 1D Mark III has a native 3:2 aspect ratio, while the one in the GX800 offers a 4:3 aspect.

In terms of underlying technology, both cameras are build around CMOS sensors.

Canon 1D Mark III and Panasonic GX800 sensor measures

Despite having a smaller sensor, the GX800 offers a higher resolution of 15.8 megapixel, compared with 10.1 MP of the 1D Mark III. 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 3.77μm versus 7.21μm for the 1D Mark III). However, it should be noted that the GX800 is much more recent (by 9 years and 10 months) than the 1D Mark III, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently. Coming back to sensor resolution, it should be mentioned that the GX800 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

1D Mark III versus GX800 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. The Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar image quality. 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
Canon 1D Mark III» APS-H 10.1 3888 2592-22.711.7107871Canon 1D Mark III
Panasonic GX800« Four Thirds 15.8 4592 34484K/30p23.213.358673Panasonic GX800
Canon 5DS R« » Full Frame 50.3 8688 57921080/60p24.612.4230886Canon 5DS R
Canon M10« » APS-C 17.9 5184 34561080/30p22.211.475365Canon M10
Canon 5D Mark III« » Full Frame 22.1 5760 38401080/30p24.011.7229381Canon 5D Mark III
Canon 1D Mark IV« » APS-H 16.0 4896 32641080/30p22.812.0132074Canon 1D Mark IV
Canon 5D Mark II« » Full Frame 21.0 5616 37441080/30p23.711.9181579Canon 5D Mark II
Canon 1Ds Mark III« » Full Frame 21.0 5616 3744-24.012.0166380Canon 1Ds Mark III
Canon 1D Mark II N« » APS-H 8.2 3504 2336-22.311.297566Canon 1D Mark II N
Canon 1D Mark II« » APS-H 8.2 3504 2336-22.311.1100366Canon 1D Mark II
Canon 1Ds« » Full Frame 11.0 4064 2704-21.811.095463Canon 1Ds
Nikon D3« » Full Frame 12.1 4256 2832-23.512.2229081Nikon D3
Nikon D2Xs« » APS-C 12.2 4288 2848-22.210.948959Nikon D2Xs
Panasonic GF7« » Four Thirds 15.8 4592 34481080/60p----Panasonic GF7
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 GF5« » Four Thirds 12.0 4000 30001080/60i21.411.661861Panasonic GF5

Many modern cameras cannot only take still pictures, but also record videos. The GX800 indeed provides for movie recording, while the 1D Mark III does not. The highest resolution format that the GX800 can use is 4K/30p.

 

Feature comparison: Canon 1D Mark III vs Panasonic GX800

Beyond body and sensor, cameras can and do differ across a range of features. For example, the 1D Mark III has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the GX800 relies on live view and the rear LCD for framing. The table below summarizes some of the other core capabilities of the Canon 1D Mark III and Panasonic GX800 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
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
Canon 1D Mark III»optical Y 3.0 230 fixed n 8000 10.0 n n Canon 1D Mark III
Panasonic GX800«- n 3.0 1040 tilting Y 500 10.0 Y n Panasonic GX800
Canon 5DS R« »optical Y 3.2 1040 fixed n 8000 5.0 n n Canon 5DS R
Canon M10« »- n 3.0 1040 tilting Y 4000 4.6 Y n Canon M10
Canon 5D Mark III« »optical Y 3.2 1040 fixed n 8000 6.0 n n Canon 5D Mark III
Canon 1D Mark IV« »optical Y 3.0 920 fixed n 8000 10.0 n n Canon 1D Mark IV
Canon 5D Mark II« »optical Y 3.0 920 fixed n 8000 3.9 n n Canon 5D Mark II
Canon 1Ds Mark III« »optical Y 3.0 230 fixed n 8000 5.0 n n Canon 1Ds Mark III
Canon 1D Mark II N« »optical Y 2.5 230 fixed n 8000 8.5 n n Canon 1D Mark II N
Canon 1D Mark II« »optical Y 2.0 230 fixed n 8000 8.3 n n Canon 1D Mark II
Canon 1Ds« »optical Y 2.0 120 fixed n 8000 3.0 n n Canon 1Ds
Nikon D3« »optical Y 3.0 922 fixed n 8000 11.0 n n Nikon D3
Nikon D2Xs« »optical Y 2.5 230 fixed n 8000 5.0 n n Nikon D2Xs
Panasonic GF7« »- n 3.0 1040 tilting Y 500 5.8 Y n Panasonic GF7
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 GF5« »- n 3.0 920 fixed Y 4000 4.0 Y n Panasonic GF5

One feature that is present on the 1D Mark III, but is missing on the GX800 is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.

The reported shutter speed and shutter burst refer to the use of the mechanical shutter. In addition, the GX800 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 1D Mark III writes its imaging data to Compact Flash or SDHC cards, while the GX800 uses SDXC cards. The 1D Mark III features dual card slots, which can be very useful in case a memory card fails. In contrast, the GX800 only has one slot.

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
Canon 1D Mark III»Y-----2.0---Canon 1D Mark III
Panasonic GX800«-stereomono--micro2.0Y--Panasonic GX800
Canon 5DS R« »YmonomonoY-mini3.0---Canon 5DS R
Canon M10« »-stereomono--mini2.0YY-Canon M10
Canon 5D Mark III« »YmonomonoYYmini2.0---Canon 5D Mark III
Canon 1D Mark IV« »Ystereo-Y-mini2.0---Canon 1D Mark IV
Canon 5D Mark II« »YmonomonoY-mini2.0---Canon 5D Mark II
Canon 1Ds Mark III« »Y-----2.0---Canon 1Ds Mark III
Canon 1D Mark II N« »Y-----1.1---Canon 1D Mark II N
Canon 1D Mark II« »Y-----1.1---Canon 1D Mark II
Canon 1Ds« »Y-----FW---Canon 1Ds
Nikon D3« »Y----mini2.0---Nikon D3
Nikon D2Xs« »Y-----2.0---Nikon D2Xs
Panasonic GF7« »-stereomono--micro2.0YY-Panasonic GF7
Panasonic G6« »YstereomonoY-mini2.0YY-Panasonic G6
Panasonic GF6« »-stereomono--mini2.0YY-Panasonic GF6
Panasonic GF5« »-stereomono--mini2.0---Panasonic GF5

The GX800 is a recent model that features in the current product line-up of Panasonic. In contrast, the 1D Mark III has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the 1D Mark III was succeeded by the Canon 1D Mark IV.

Review summary: Canon 1D Mark III vs Panasonic GX800

So what conclusions can be drawn? Is the Canon 1D Mark III better than the Panasonic GX800 or vice versa? The listing below highlights the relative strengths of the two models.

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Reasons to prefer the Canon EOS-1D Mark III:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better low-light sensitivity: Requires less light for good images (0.9 stops ISO advantage).
  • Easier framing: Has an optical viewfinder for image framing and settings control.
  • Easier setting verification: Features an LCD display on top to control shooting parameters.
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 500/sec) to freeze action.
  • More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
  • Longer lasting: Can take more shots (2200 versus 210) on a single battery charge.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • More heavily discounted: Has been available for much longer (launched in February 2007).

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Advantages of the Panasonic Lumix DMC-GX800:

  • More detail: Has more megapixels (15.8 vs 10.1MP), which boosts linear resolution by 23%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • More dynamic range: Captures a broader range of light and dark details (1.6 EV of extra DR).
  • Broader imaging potential: Can capture not only stills but also 4K/30p video.
  • More detailed LCD: Has a higher resolution rear screen (1040k vs 230k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More compact: Is smaller (107x65mm vs 156x156.6mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 886g or 77 percent) and is thus easier to take along.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • Easier file upload: Has wifi build in for automatic backup or image transfer to the web.
  • More affordable: Was introduced into a lower priced category (88 percent cheaper at launch).
  • More modern: Reflects 9 years and 10 months of technical progress since the 1D Mark III launch.

If the count of individual advantages (bullet points above) is taken as a guide, the GX800 is the clear winner of the contest (15 : 11 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding on a new camera.

1D Mark III 11:15 GX800

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains partial and cannot reveal, for example, the handling experience and imaging performance when actually working with the 1D Mark III or the GX800. 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
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Canon 1D Mark III»---rev- Feb 2007 4,499- i Canon 1D Mark III
Panasonic GX800«Rec76/1004.5/54/54.5/5 Jan 2017 549 i i Panasonic GX800
Canon 5DS R« »Rec83/1005/55/54.5/5 Feb 2015 3,699 i i Canon 5DS R
Canon M10« »---rev4/5 Oct 2015 499- i Canon M10
Canon 5D Mark III« »HiRec82/1004.5/55/54.5/5 Mar 2012 3,499- i Canon 5D Mark III
Canon 1D Mark IV« »-89/100-5/5- Oct 2009 4,999- i Canon 1D Mark IV
Canon 5D Mark II« »91/10079/1004/55/5- Sep 2008 3,499- i Canon 5D Mark II
Canon 1Ds Mark III« »-HiRec4.5/5-- Aug 2007 7,999- i Canon 1Ds Mark III
Canon 1D Mark II N« »----- Aug 2005 3,999- i Canon 1D Mark II N
Canon 1D Mark II« »-HiRec-rev- Jan 2004 4,499- i Canon 1D Mark II
Canon 1Ds« »-HiRec--- Sep 2002 8,999- i Canon 1Ds
Nikon D3« »-HiRec5/5rev4.5/5 Aug 2007 4,999- i Nikon D3
Nikon D2Xs« »---rev- Jun 2006 4,699- i Nikon D2Xs
Panasonic GF7« »Rec-4.5/54.5/54.5/5 Jan 2015 499- i Panasonic GF7
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 GF5« »--4.5/54/54.5/5 Apr 2012 499- i Panasonic GF5

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

 

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. 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 you do not see the camera that you are looking for, please send me an email, and I will try to locate and add the respective data to the application.

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