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Canon 1Ds Mark III vs Panasonic GX1

The Canon EOS-1Ds Mark III and the Panasonic Lumix DMC-GX1 are two digital cameras that were revealed to the public, respectively, in August 2007 and November 2011. The 1Ds Mark III is a DSLR, while the GX1 is a mirrorless interchangeable lens camera. The cameras are based on a full frame (1Ds Mark III) and a Four Thirds (GX1) sensor. The Canon has a resolution of 21 megapixels, whereas the Panasonic provides 15.8 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Canon 1Ds Mark III VS Panasonic GX1
Canon 1Ds Mark III Panasonic GX1
Digital single lens reflex Mirrorless system camera
Canon EF mount lenses Micro Four Thirds lenses
21 MP, Full Frame Sensor 15.8 MP, Four Thirds Sensor
no Video 1080/60p Video
ISO 100-1600 (50-3200) ISO 160-12800
Optical viewfinder Viewfinder optional
3.0" LCD, 230k dots 3.0" LCD, 460k dots
Fixed screen (not touch-sensitive) Fixed touchscreen
5 shutter flaps per second 4.2 shutter flaps per second
Weathersealed bodyNot weather sealed
1800 shots per battery charge320 shots per battery charge
150 x 160 x 80 mm, 1385 g 116 x 68 x 39 mm, 318 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS-1Ds Mark III and the Panasonic Lumix DMC-GX1? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.

Body comparison

An illustration of the physical size and weight of the Canon 1Ds Mark III and the Panasonic GX1 is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All size dimensions are rounded to the nearest millimeter.

Size Canon 1Ds Mark III vs Panasonic GX1
Compare 1Ds Mark III versus GX1 top
Comparison 1Ds Mark III or GX1 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic GX1 is considerably smaller (67 percent) than the Canon 1Ds Mark III. Moreover, the GX1 is substantially lighter (77 percent) than the 1Ds Mark III. It is worth mentioning in this context that the 1Ds Mark III is splash and dust resistant, while the GX1 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 compare the optics available for the two cameras in the Canon EF Lens Catalog (1Ds Mark III) and the Micro Four Thirds Lens Catalog (GX1). Mirrorless cameras, such as the GX1, 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 1Ds Mark III gets 1800 shots out of its LP-E4 battery, while the GX1 can take 320 images on a single charge of its DMW-BLD10 power pack. As can be seen in the images above, the 1Ds Mark III has a battery grip built in. This facilitates image-taking in portrait orientation and gives it additional battery power.

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)
Camera
Model
 
Canon 1Ds Mark III» 5.9 in 6.3 in 3.1 in 48.9 oz 1800 Y Aug 2007 7,999iCanon 1Ds Mark III
 
Panasonic GX1« 4.6 in 2.7 in 1.5 in 11.2 oz 320 n Nov 2011 699iPanasonic GX1
 
Canon 1D X Mark III« » 6.2 in 6.6 in 3.3 in 50.8 oz 2850 Y Jan 2020 6,499 iCanon 1D X Mark III
 
Canon 1D X Mark II« » 6.2 in 6.6 in 3.3 in 54.0 oz 1210 Y Feb 2016 5,999iCanon 1D X Mark II
 
Canon 1D C« » 6.2 in 6.5 in 3.3 in 54.5 oz 1120 Y Apr 2012 14,999iCanon 1D C
 
Canon 5D Mark III« » 6.0 in 4.6 in 3.0 in 33.5 oz 950 Y Mar 2012 3,499iCanon 5D Mark III
 
Canon 1D X« » 6.2 in 6.6 in 3.3 in 54.7 oz 1120 Y Oct 2011 6,799iCanon 1D X
 
Canon 5D Mark II« » 6.0 in 4.5 in 3.0 in 30.0 oz 850 Y Sep 2008 3,499iCanon 5D Mark II
 
Canon 1D Mark III« » 6.1 in 6.2 in 3.1 in 40.7 oz 2200 Y Feb 2007 4,499iCanon 1D Mark III
 
Canon 1Ds Mark II« » 6.1 in 6.2 in 3.1 in 42.9 oz 1200 Y Sep 2004 7,999iCanon 1Ds Mark II
 
Canon 1Ds« » 6.1 in 6.2 in 3.1 in 44.6 oz 600 Y Sep 2002 8,999iCanon 1Ds
 
Nikon D3X« » 6.3 in 6.2 in 3.5 in 44.4 oz 4400 Y Dec 2008 7,999iNikon D3X
 
Panasonic G6« » 4.8 in 3.3 in 2.8 in 13.8 oz 340 n Apr 2013 599iPanasonic G6
 
Panasonic GM1« » 3.9 in 2.2 in 1.2 in 7.2 oz 230 n Oct 2013 749iPanasonic GM1
 
Panasonic G5« » 4.7 in 3.3 in 2.8 in 14.0 oz 320 n Jul 2012 599iPanasonic G5
 
Panasonic G3« » 4.5 in 3.3 in 1.9 in 11.9 oz 270 n May 2011 599iPanasonic G3
 
Panasonic GH2« » 4.9 in 3.5 in 3.0 in 15.6 oz 330 n Sep 2010 899iPanasonic GH2
Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.

Any camera decision will obviously take relative prices into account. 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 GX1 was launched at a markedly lower price (by 91 percent) than the 1Ds 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

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 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Canon 1Ds Mark III features a full frame sensor and the Panasonic GX1 a Four Thirds sensor. The sensor area in the GX1 is 74 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 2.0. The sensor in the 1Ds Mark III has a native 3:2 aspect ratio, while the one in the GX1 offers a 4:3 aspect.

Canon 1Ds Mark III and Panasonic GX1 sensor measures

With 21MP, the 1Ds Mark III offers a higher resolution than the GX1 (15.8MP), but the 1Ds Mark III nevertheless has larger individual pixels (pixel pitch of 6.41μm versus 3.77μm for the GX1) due to its larger sensor. However, the GX1 is a much more recent model (by 4 years and 2 months) than the 1Ds Mark III, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels.

The resolution advantage of the Canon 1Ds Mark III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 1Ds Mark III for good quality output (200 dots per inch) amounts to 28.1 x 18.7 inch or 71.3 x 47.5 cm, for very good quality (250 dpi) 22.5 x 15 inch or 57.1 x 38 cm, and for excellent quality (300 dpi) 18.7 x 12.5 inch or 47.5 x 31.7 cm. The corresponding values for the Panasonic GX1 are 23 x 17.2 inch or 58.3 x 43.8 cm for good quality, 18.4 x 13.8 inch or 46.7 x 35 cm for very good quality, and 15.3 x 11.5 inch or 38.9 x 29.2 cm for excellent quality prints.

The Canon EOS-1Ds Mark III has a native sensitivity range from ISO 100 to ISO 1600, which can be extended to ISO 50-3200. The corresponding ISO settings for the Panasonic Lumix DMC-GX1 are ISO 160 to ISO 12800 (no boost).

1Ds Mark III versus GX1 MP

For many cameras, data on sensor performance has been reported by DXO Mark. 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. Of the two cameras under review, the 1Ds Mark III provides substantially higher image quality than the GX1, with an overall score that is 25 points higher. This advantage is based on 3.2 bits higher color depth, 1.4 EV in additional dynamic range, and 1.2 stops in additional 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
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
 
Canon 1Ds Mark III Full Frame 21.0 5616 3744none24.012.0166380Canon 1Ds Mark III
 
Panasonic GX1 Four Thirds 15.8 4592 34481080/60p20.810.670355Panasonic GX1
 
Canon 1D X Mark III Full Frame 20.0 5472 36484K/60p........Canon 1D X Mark III
 
Canon 1D X Mark II Full Frame 20.0 5472 36484K/60p24.113.5320788Canon 1D X Mark II
 
Canon 1D C Full Frame 17.9 5184 34564K/24p........Canon 1D C
 
Canon 5D Mark III Full Frame 22.1 5760 38401080/30p24.011.7229381Canon 5D Mark III
 
Canon 1D X Full Frame 17.9 5184 34561080/30p23.811.8278682Canon 1D X
 
Canon 5D Mark II Full Frame 21.0 5616 37441080/30p23.711.9181579Canon 5D Mark II
 
Canon 1D Mark III APS-H 10.1 3888 2592none22.711.7107871Canon 1D Mark III
 
Canon 1Ds Mark II Full Frame 16.6 4992 3328none23.311.3148074Canon 1Ds Mark II
 
Canon 1Ds Full Frame 11.0 4064 2704none21.811.095463Canon 1Ds
 
Nikon D3X Full Frame 24.4 6048 4032none24.713.7199288Nikon D3X
 
Panasonic G6 Four Thirds 15.9 4608 34561080/60p21.311.563961Panasonic G6
 
Panasonic GM1 Four Thirds 15.8 4592 34481080/60i22.311.766066Panasonic GM1
 
Panasonic G5 Four Thirds 15.9 4608 34561080/60p........Panasonic G5
 
Panasonic G3 Four Thirds 15.8 4592 34481080/60i21.010.666756Panasonic G3
 
Panasonic GH2 Four Thirds 15.9 4608 34561080/60i21.211.365560Panasonic GH2

Many modern cameras cannot only take still pictures, but also record videos. The GX1 indeed provides for movie recording, while the 1Ds Mark III does not. The highest resolution format that the GX1 can use is 1080/60p.

 

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the 1Ds Mark III has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the GX1 relies on live view and the rear LCD for framing. That said, the GX1 can be equipped with an optional viewfinder – the DMW-LVF2. The adjacent table lists some of the other core features of the Canon 1Ds Mark III and Panasonic GX1 along with similar information for a selection of comparators.

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)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
Camera
Model
 
Canon 1Ds Mark IIIoptical Y 3.0 230 fixed n 1/8000s 5.0 n n Canon 1Ds Mark III
 
Panasonic GX1optional n 3.0 460 fixed Y 1/4000s 4.2 Y n Panasonic GX1
 
Canon 1D X Mark IIIoptical Y 3.2 2100 fixed Y 1/8000s 20.0 n n Canon 1D X Mark III
 
Canon 1D X Mark IIoptical Y 3.2 1620 fixed Y 1/8000s 16.0 n n Canon 1D X Mark II
 
Canon 1D Coptical Y 3.2 1040 fixed n 1/8000s 14.0 n n Canon 1D C
 
Canon 5D Mark IIIoptical Y 3.2 1040 fixed n 1/8000s 6.0 n n Canon 5D Mark III
 
Canon 1D Xoptical Y 3.2 1040 fixed n 1/8000s 14.0 n n Canon 1D X
 
Canon 5D Mark IIoptical Y 3.0 920 fixed n 1/8000s 3.9 n n Canon 5D Mark II
 
Canon 1D Mark IIIoptical Y 3.0 230 fixed n 1/8000s 10.0 n n Canon 1D Mark III
 
Canon 1Ds Mark IIoptical Y 2.0 230 fixed n 1/8000s 4.0 n n Canon 1Ds Mark II
 
Canon 1Dsoptical Y 2.0 120 fixed n 1/8000s 3.0 n n Canon 1Ds
 
Nikon D3Xoptical Y 3.0 922 fixed n 1/8000s 5.0 n n Nikon D3X
 
Panasonic G61440 n 3.0 1036 swivel Y 1/4000s 7.0 Y n Panasonic G6
 
Panasonic GM1none n 3.0 1036 fixed Y 1/500s 5.0 Y n Panasonic GM1
 
Panasonic G51440 n 3.0 920 swivel Y 1/4000s 6.0 Y n Panasonic G5
 
Panasonic G31440 n 3.0 460 swivel Y 1/4000s 4.0 Y n Panasonic G3
 
Panasonic GH21534 n 3.0 460 swivel n 1/4000s 3.0 Y n Panasonic GH2

One feature that is present on the 1Ds Mark III, but is missing on the GX1 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 1Ds Mark III writes its imaging data to Compact Flash or SDHC cards, while the GX1 uses SDXC cards. The GX1 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the 1Ds Mark III cannot take advantage of Ultra High Speed SD cards.

 

Connectivity comparison

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 Canon EOS-1Ds Mark III and Panasonic Lumix DMC-GX1 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
Port
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
 
Canon 1Ds Mark IIIYnonenone--none2.0---Canon 1Ds Mark III
 
Panasonic GX1Ystereomono--mini2.0---Panasonic GX1
 
Canon 1D X Mark IIIYmonomonoYYmini3.1Y-YCanon 1D X Mark III
 
Canon 1D X Mark IIYmonomonoYYmini3.0---Canon 1D X Mark II
 
Canon 1D CYmonomonoYYmini2.0---Canon 1D C
 
Canon 5D Mark IIIYmonomonoYYmini2.0---Canon 5D Mark III
 
Canon 1D XYmonononeY-mini2.0---Canon 1D X
 
Canon 5D Mark IIYmonomonoY-mini2.0---Canon 5D Mark II
 
Canon 1D Mark IIIYnonenone--none2.0---Canon 1D Mark III
 
Canon 1Ds Mark IIYnonenone--none2.0---Canon 1Ds Mark II
 
Canon 1DsYnonenone--noneFW---Canon 1Ds
 
Nikon D3XYnonenone--mini2.0---Nikon D3X
 
Panasonic G6YstereomonoY-mini2.0YY-Panasonic G6
 
Panasonic GM1-stereomono--micro2.0Y--Panasonic GM1
 
Panasonic G5Ystereomono--mini2.0---Panasonic G5
 
Panasonic G3Ystereomono--mini2.0---Panasonic G3
 
Panasonic GH2YstereomonoY-mini2.0---Panasonic GH2

Studio photographers will appreciate that the Canon 1Ds Mark III (unlike the GX1) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the 1Ds Mark III and the GX1 have been discontinued, but can regularly be found used on eBay. The 1Ds Mark III was replaced by the Canon 1DX, while the GX1 was followed by the Panasonic GX7. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon and Panasonic websites.

Review summary

So how do things add up? Which of the two cameras – the Canon 1Ds Mark III or the Panasonic GX1 – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.

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Advantages of the Canon EOS-1Ds Mark III:

  • More detail: Offers more megapixels (21 vs 15.8MP) with a 18% higher linear resolution.
  • Better image quality: Scores substantially higher (25 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (3.2 bits more color depth).
  • More dynamic range: Captures a larger spectrum of light and dark details (1.4 EV of extra DR).
  • Better low-light sensitivity: Requires less light for good images (1.2 stops ISO advantage).
  • Easier framing: Has an optical viewfinder for image composition and settings control.
  • Easier setting verification: Features an LCD display on top to control shooting parameters.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (5 vs 4.2 flaps/sec) to capture the decisive moment.
  • More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
  • Longer lasting: Can take more shots (1800 versus 320) on a single battery charge.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • More heavily discounted: Has been available for much longer (launched in August 2007).

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Arguments in favor of the Panasonic Lumix DMC-GX1:

  • Broader imaging potential: Can capture not only stills but also 1080/60p video.
  • More detailed LCD: Has a higher resolution rear screen (460k vs 230k dots).
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • More compact: Is smaller (116x68mm vs 150x160mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 1067g 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.
  • Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
  • More affordable: Was introduced into a lower priced category (91 percent cheaper at launch).
  • More modern: Reflects 4 years and 2 months of technical progress since the 1Ds Mark III launch.

If the number of relative strengths (bullet points above) is taken as a guide, the 1Ds Mark III is the clear winner of the match-up (14 : 10 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. A professional wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

1Ds Mark III 14:10 GX1

How about other alternatives? Do the specifications of the Canon 1Ds Mark III and the Panasonic GX1 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it says little about, for example, the shooting experience and imaging performance of the 1Ds Mark III and the GX1 in practical situations. 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.

Expert reviews

This is why expert reviews are important. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

Review Scores
  Camera
Model
cam
era
  labs  
dp
re
  view  
e
photo
  zine  
ima
ging
resource
photo
graphy
  blog  
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Camera
Model
 
Canon 1Ds Mark III..+ +4.5/5.... Aug 2007 7,999iCanon 1Ds Mark III
 
Panasonic GX1+77/1004.5/54.5/54.5/5 Nov 2011 699iPanasonic GX1
 
Canon 1D X Mark III+ +........ Jan 2020 6,499 iCanon 1D X Mark III
 
Canon 1D X Mark II..89/1004.5/55/54.5/5 Feb 2016 5,999iCanon 1D X Mark II
 
Canon 1D C.......... Apr 2012 14,999iCanon 1D C
 
Canon 5D Mark III+ +82/1004.5/55/54.5/5 Mar 2012 3,499iCanon 5D Mark III
 
Canon 1D X....4.5/54.5/54.5/5 Oct 2011 6,799iCanon 1D X
 
Canon 5D Mark II91/10079/1004/55/5.. Sep 2008 3,499iCanon 5D Mark II
 
Canon 1D Mark III......o.. Feb 2007 4,499iCanon 1D Mark III
 
Canon 1Ds Mark II..+ +...... Sep 2004 7,999iCanon 1Ds Mark II
 
Canon 1Ds..+ +...... Sep 2002 8,999iCanon 1Ds
 
Nikon D3X..86/1004/55/55/5 Dec 2008 7,999iNikon D3X
 
Panasonic G6+ +..5/5..4.5/5 Apr 2013 599iPanasonic G6
 
Panasonic GM1+78/1005/54.5/54.5/5 Oct 2013 749iPanasonic GM1
 
Panasonic G5+ +..4.5/54.5/54.5/5 Jul 2012 599iPanasonic G5
 
Panasonic G3+ +75/1004.5/54.5/55/5 May 2011 599iPanasonic G3
 
Panasonic GH2+ +79/1004.5/54.5/55/5 Sep 2010 899iPanasonic GH2
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated with care, though. The ratings are only valid when referring 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 rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, please note that some of the review sites have changed their methodology and reporting over time.

Canon 1Ds Mark III:
Check Ebay offers
Panasonic GX1:
Check Ebay offers

Other camera comparisons

Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make a corresponding selection in the search boxes below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Canon 1Ds Mark III vs Panasonic GX1

    Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.

    Camera Specifications
    Camera Model Canon 1Ds Mark III Panasonic GX1
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Canon EF mount lenses Micro Four Thirds lenses
    Launch Date August 2007 November 2011
    Launch Price USD 7999 USD 699
    Sensor Specs Canon 1Ds Mark III Panasonic GX1
    Sensor Technology CMOS CMOS
    Sensor Format Full Frame Sensor Four Thirds Sensor
    Sensor Size 36.0 x 24.0 mm 17.3 x 13.0 mm
    Sensor Area 864 mm2 224.9 mm2
    Sensor Diagonal 43.3 mm 21.6 mm
    Crop Factor 1.0x 2.0x
    Sensor Resolution 21 Megapixels 15.8 Megapixels
    Image Resolution 5616 x 3744 pixels 4592 x 3448 pixels
    Pixel Pitch 6.41 μm 3.77 μm
    Pixel Density 2.43 MP/cm2 7.04 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability no Video 1080/60p Video
    ISO Setting 100-1600 ISO 160-12800 ISO
    ISO Boost 50-3200 ISO no Enhancement
    Image Processor DIGIC III (Dual) Venus FHD
    DXO Sensor Quality (score) 80 55
    DXO Color Depth (bits) 24.0 20.8
    DXO Dynamic Range (EV) 12.0 10.6
    DXO Low Light (ISO) 1663 703
    Screen Specs Canon 1Ds Mark III Panasonic GX1
    Viewfinder Type Optical viewfinder Viewfinder optional
    Viewfinder Field of View 100%
    Viewfinder Magnification 0.76x
    Top-Level Screen Control Panel no Top Display
    LCD Framing Live View Live View
    Rear LCD Size 3.0 inch 3.0 inch
    LCD Resolution 230k dots 460k dots
    LCD Attachment Fixed screen Fixed screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Canon 1Ds Mark III Panasonic GX1
    Focus System Phase-detect AF Contrast-detect AF
    Manual Focusing AidNo Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/8000/s 1/4000/s
    Continuous Shooting 5 shutter flaps/s 4.2 shutter flaps/s
    Fill Flash no On-Board Flash Build-in Flash
    Storage Medium CF or SDHC cards SDXC cards
    Second Storage Option Single card slot Single card slot
    UHS card support no UHS-I
    Connectivity Specs Canon 1Ds Mark III Panasonic GX1
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 2.0 USB 2.0
    HDMI Port no HDMI mini HDMI
    Wifi Support no Wifi no Wifi
    Body Specs Canon 1Ds Mark III Panasonic GX1
    Environmental SealingWeathersealed bodyNot weather sealed
    Battery Type LP-E4 DMW-BLD10
    Battery Life (CIPA)1800 shots per charge320 shots per charge
    Body Dimensions 150 x 160 x 80 mm
    (5.9 x 6.3 x 3.1 in)
    116 x 68 x 39 mm
    (4.6 x 2.7 x 1.5 in)
    Camera Weight 1385 g (48.9 oz) 318 g (11.2 oz)

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