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Canon 1Ds Mark III vs Panasonic GM1

The Canon EOS-1Ds Mark III and the Panasonic Lumix DMC-GM1 are two digital cameras that were officially introduced, respectively, in August 2007 and October 2013. The 1Ds Mark III is a DSLR, while the GM1 is a mirrorless interchangeable lens camera. The cameras are based on a full frame (1Ds Mark III) and a Four Thirds (GM1) 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
versus
Panasonic GM1
Canon 1Ds Mark III   Panasonic GM1
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 1080/60i Video
ISO 100-1,600 (50 - 3,200) ISO 200-25,600
Optical viewfinder No viewfinder, LCD framing
3.0" LCD – 230k dots 3.0" LCD – 1036k dots
Fixed screen (not touch-sensitive) Fixed touchscreen
5 shutter flaps per second 5 shutter flaps per second
Weathersealed bodynot weather sealed
1800 shots per battery charge230 shots per battery charge
150 x 160 x 80 mm, 1385 g 99 x 55 x 30 mm, 204 g
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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-GM1? 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.

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Body comparison

The physical size and weight of the Canon 1Ds Mark III and the Panasonic GM1 are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth measures are rounded to the nearest millimeter.

The GM1 can be obtained in three different colors (black, silver, red), while the 1Ds Mark III is only available in black.

Size Canon 1Ds Mark III vs Panasonic GM1
Compare 1Ds Mark III versus GM1 top
Comparison 1Ds Mark III or 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 considerably smaller (77 percent) than the Canon 1Ds Mark III. Moreover, the GM1 is substantially lighter (85 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 GM1 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 (GM1). Mirrorless cameras, such as the GM1, 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 Canon LP-E4 battery, while the GM1 can take 230 images on a single charge of its Panasonic DMW-BLH7 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 adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

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Body Specifications
  empty Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Canon 1Ds Mark III 150 mm 160 mm 80 mm 1385 g 1800 Y Aug 2007 7,999ebay.com
2.
 
Panasonic GM1 99 mm 55 mm 30 mm 204 g 230 n Oct 2013 749ebay.com
3.
 
Canon 1D Mark III 156 mm 157 mm 80 mm 1155 g 2200 Y Feb 2007 4,499ebay.com
4.
 
Canon 1Ds 156 mm 158 mm 80 mm 1265 g 600 Y Sep 2002 8,999ebay.com
5.
 
Canon 1Ds Mark II 156 mm 158 mm 80 mm 1215 g 1200 Y Sep 2004 7,999ebay.com
6.
 
Canon 1D C 158 mm 164 mm 83 mm 1545 g 1120 Y Apr 2012 14,999ebay.com
7.
 
Canon 1D X 158 mm 168 mm 83 mm 1551 g 1120 Y Oct 2011 6,799ebay.com
8.
 
Canon 1D X Mark II 158 mm 168 mm 83 mm 1530 g 1210 Y Feb 2016 5,999ebay.com
9.
 
Canon 1D X Mark III 158 mm 168 mm 83 mm 1440 g 2850 Y Jan 2020 6,499 amazon.com
10.
 
Canon 5D Mark II 152 mm 114 mm 75 mm 850 g 850 Y Sep 2008 3,499ebay.com
11.
 
Canon 5D Mark III 152 mm 116 mm 76 mm 950 g 950 Y Mar 2012 3,499ebay.com
12.
 
Nikon D3X 160 mm 157 mm 88 mm 1260 g 4400 Y Dec 2008 7,999ebay.com
13.
 
Panasonic G6 122 mm 85 mm 71 mm 390 g 340 n Apr 2013 599ebay.com
14.
 
Panasonic GH2 124 mm 90 mm 76 mm 442 g 330 n Sep 2010 899ebay.com
15.
 
Panasonic GM5 99 mm 60 mm 36 mm 211 g 220 n Sep 2014 749ebay.com
16.
 
Panasonic GX1 116 mm 68 mm 39 mm 318 g 320 n Nov 2011 699ebay.com
17.
 
Panasonic GX7 123 mm 71 mm 55 mm 402 g 350 n Aug 2013 999ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or 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 GM1 was launched at a markedly lower price (by 91 percent) than the 1Ds Mark III, 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

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. 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 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 GM1 a Four Thirds sensor. The sensor area in the GM1 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 GM1 offers a 4:3 aspect.

Canon 1Ds Mark III and Panasonic GM1 sensor measures

With 21MP, the 1Ds Mark III offers a higher resolution than the GM1 (15.8MP), but the 1Ds Mark III nevertheless has larger individual pixels (pixel pitch of 6.41μm versus 3.77μm for the GM1) due to its larger sensor. However, the GM1 is a much more recent model (by 6 years and 1 month) 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 inches or 71.3 x 47.5 cm, for very good quality (250 dpi) 22.5 x 15 inches or 57.1 x 38 cm, and for excellent quality (300 dpi) 18.7 x 12.5 inches or 47.5 x 31.7 cm. The corresponding values for the Panasonic GM1 are 23 x 17.2 inches or 58.3 x 43.8 cm for good quality, 18.4 x 13.8 inches or 46.7 x 35 cm for very good quality, and 15.3 x 11.5 inches 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-GM1 are ISO 200 to ISO 25600, with the possibility to increase the ISO range to 125-25600.

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

1Ds Mark III versus GM1 MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). Of the two cameras under review, the 1Ds Mark III provides substantially higher image quality than the GM1, with an overall score that is 14 points higher. This advantage is based on 1.7 bits higher color depth, 0.3 EV in additional dynamic range, and 1.3 stops in additional low light sensitivity. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

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Sensor Characteristics
  empty Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Canon 1Ds Mark III Full Frame 21.0 5616 3744none24.012.0166380
2.
 
Panasonic GM1 Four Thirds 15.8 4592 34481080/60i22.311.766066
3.
 
Canon 1D Mark III APS-H 10.1 3888 2592none22.711.7107871
4.
 
Canon 1Ds Full Frame 11.0 4064 2704none21.811.095463
5.
 
Canon 1Ds Mark II Full Frame 16.6 4992 3328none23.311.3148074
6.
 
Canon 1D C Full Frame 17.9 5184 34564K/24p24.313.0215585
7.
 
Canon 1D X Full Frame 17.9 5184 34561080/30p23.811.8278682
8.
 
Canon 1D X Mark II Full Frame 20.0 5472 36484K/60p24.113.5320788
9.
 
Canon 1D X Mark III Full Frame 20.0 5472 36484K/60p24.214.5324891
10.
 
Canon 5D Mark II Full Frame 21.0 5616 37441080/30p23.711.9181579
11.
 
Canon 5D Mark III Full Frame 22.1 5760 38401080/30p24.011.7229381
12.
 
Nikon D3X Full Frame 24.4 6048 4032none24.713.7199288
13.
 
Panasonic G6 Four Thirds 15.9 4608 34561080/60p21.311.563961
14.
 
Panasonic GH2 Four Thirds 15.9 4608 34561080/60i21.211.365560
15.
 
Panasonic GM5 Four Thirds 15.8 4592 34481080/60p22.111.772166
16.
 
Panasonic GX1 Four Thirds 15.8 4592 34481080/60p20.810.670355
17.
 
Panasonic GX7 Four Thirds 15.8 4592 34481080/60p22.612.271870
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras cannot only take still pictures, but also record videos. The GM1 indeed provides for movie recording, while the 1Ds Mark III does not. The highest resolution format that the GM1 can use is 1080/60i.

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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 GM1 relies on live view and the rear LCD for framing. The following table reports on some other key feature differences and similarities of the Canon 1Ds Mark III, the Panasonic GM1, and comparable cameras.

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Core Features
  empty Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Canon 1Ds Mark IIIoptical Y3.0 / 230 fixed n 1/8000s 5.0/s n n
2.
 
Panasonic GM1none n3.0 / 1036 fixed Y 1/500s 5.0/s Y n
3.
 
Canon 1D Mark IIIoptical Y3.0 / 230 fixed n 1/8000s 10.0/s n n
4.
 
Canon 1Dsoptical Y2.0 / 120 fixed n 1/8000s 3.0/s n n
5.
 
Canon 1Ds Mark IIoptical Y2.0 / 230 fixed n 1/8000s 4.0/s n n
6.
 
Canon 1D Coptical Y3.2 / 1040 fixed n 1/8000s 14.0/s n n
7.
 
Canon 1D Xoptical Y3.2 / 1040 fixed n 1/8000s 14.0/s n n
8.
 
Canon 1D X Mark IIoptical Y3.2 / 1620 fixed Y 1/8000s 16.0/s n n
9.
 
Canon 1D X Mark IIIoptical Y3.2 / 2100 fixed Y 1/8000s 20.0/s n n
10.
 
Canon 5D Mark IIoptical Y3.0 / 920 fixed n 1/8000s 3.9/s n n
11.
 
Canon 5D Mark IIIoptical Y3.2 / 1040 fixed n 1/8000s 6.0/s n n
12.
 
Nikon D3Xoptical Y3.0 / 922 fixed n 1/8000s 5.0/s n n
13.
 
Panasonic G61440 n3.0 / 1036 swivel Y 1/4000s 7.0/s Y n
14.
 
Panasonic GH21534 n3.0 / 460 swivel n 1/4000s 3.0/s Y n
15.
 
Panasonic GM51166 n3.0 / 921 fixed Y 1/500s 5.8/s n n
16.
 
Panasonic GX1optional n3.0 / 460 fixed Y 1/4000s 4.2/s Y n
17.
 
Panasonic GX72760 n3.0 / 1040 tilting Y 1/8000s 5.0/s Y Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One feature that is present on the 1Ds Mark III, but is missing on the GM1 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 information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the GM1 is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The Panasonic GM1 has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

The 1Ds Mark III writes its imaging data to Compact Flash or SDHC cards, while the GM1 uses SDXC cards. The 1Ds Mark III features dual card slots, which can be very useful in case a memory card fails. In contrast, the GM1 only has one slot. The GM1 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.

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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-GM1 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
  empty Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Canon 1Ds Mark IIIYmono / ----2.0---
2.
 
Panasonic GM1-stereo / mono--micro2.0Y--
3.
 
Canon 1D Mark IIIY- / ----2.0---
4.
 
Canon 1DsY- / ----FW---
5.
 
Canon 1Ds Mark IIY- / ----2.0---
6.
 
Canon 1D CYmono / monoYYmini2.0---
7.
 
Canon 1D XYmono / -Y-mini2.0---
8.
 
Canon 1D X Mark IIYmono / monoYYmini3.0---
9.
 
Canon 1D X Mark IIIYmono / monoYYmini3.1Y-Y
10.
 
Canon 5D Mark IIYmono / monoY-mini2.0---
11.
 
Canon 5D Mark IIIYmono / monoYYmini2.0---
12.
 
Nikon D3XY- / ---mini2.0---
13.
 
Panasonic G6Ystereo / monoY-mini2.0YY-
14.
 
Panasonic GH2Ystereo / monoY-mini2.0---
15.
 
Panasonic GM5Ystereo / mono--micro2.0Y--
16.
 
Panasonic GX1Ystereo / mono--mini2.0---
17.
 
Panasonic GX7Ystereo / mono--mini2.0YY-

It is notable that the 1Ds Mark III has a hotshoe, while the GM1 does not. This socket makes it possible to easily attach optional accessories, such as an external flash gun.

Studio photographers will appreciate that the Canon 1Ds Mark III (unlike the GM1) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the 1Ds Mark III and the GM1 have been discontinued, but can regularly be found used on ebay. The 1Ds Mark III was replaced by the Canon 1DX, while the GM1 was followed by the Panasonic GM5. Further information on the features and operation of the 1Ds Mark III and GM1 can be found, respectively, in the Canon 1Ds Mark III Manual (free pdf) or the online Panasonic GM1 Manual.

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Review summary

So what is the bottom line? Is the Canon 1Ds Mark III better than the Panasonic GM1 or vice versa? The listing below highlights the relative strengths of the two models.

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Arguments in favor 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 (14 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (1.7 bits more color depth).
  • Better low-light sensitivity: Requires less light for good images (1.3 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 1/500s) to freeze action.
  • More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
  • Longer lasting: Can take more shots (1800 versus 230) 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.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • 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 August 2007).

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Reasons to prefer the Panasonic Lumix DMC-GM1:

  • Broader imaging potential: Can capture not only stills but also 1080/60i video.
  • More detailed LCD: Has a higher resolution rear screen (1036k vs 230k dots).
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • More compact: Is smaller (99x55mm vs 150x160mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 1181g or 85 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 built in for automatic backup or image transfer to the web.
  • 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 6 years and 1 month of technical progress since the 1Ds Mark III launch.

If the count of individual advantages (bullet points above) is taken as a guide, the 1Ds Mark III comes out slightly ahead of the GM1 (14 : 13 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 14:13 GM1

How about other alternatives? Do the specifications of the Canon 1Ds Mark III and the Panasonic GM1 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 comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it says little about, for example, the shooting experience and imaging performance of the 1Ds Mark III and the GM1 in practical situations. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is why hands-on reviews by experts are important. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). 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.

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Expert Camera Reviews
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Canon 1Ds Mark III......+ +4.5/5.. Aug 2007 7,999ebay.com
2.
 
Panasonic GM13/5+..78/1005/54.5/5 Oct 2013 749ebay.com
3.
 
Canon 1D Mark III............ Feb 2007 4,499ebay.com
4.
 
Canon 1Ds......+ +.... Sep 2002 8,999ebay.com
5.
 
Canon 1Ds Mark II......+ +.... Sep 2004 7,999ebay.com
6.
 
Canon 1D C............ Apr 2012 14,999ebay.com
7.
 
Canon 1D X5/5......4.5/54.5/5 Oct 2011 6,799ebay.com
8.
 
Canon 1D X Mark II....4.5/589/1004.5/54.5/5 Feb 2016 5,999ebay.com
9.
 
Canon 1D X Mark III..+ +5/5..4.5/54/5 Jan 2020 6,499 amazon.com
10.
 
Canon 5D Mark II4/591/100..79/1004/5.. Sep 2008 3,499ebay.com
11.
 
Canon 5D Mark III..+ +..82/1004.5/54.5/5 Mar 2012 3,499ebay.com
12.
 
Nikon D3X......86/1004/55/5 Dec 2008 7,999ebay.com
13.
 
Panasonic G64/5+ +....5/54.5/5 Apr 2013 599ebay.com
14.
 
Panasonic GH25/5+ +..79/1004.5/55/5 Sep 2010 899ebay.com
15.
 
Panasonic GM53.5/5+..77/1005/54.5/5 Sep 2014 749ebay.com
16.
 
Panasonic GX13/5+..77/1004.5/54.5/5 Nov 2011 699ebay.com
17.
 
Panasonic GX74/5+..79/1005/55/5 Aug 2013 999ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

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. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, 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.

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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 your choice using the following search menu. 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 GM1

    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 GM1
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Canon EF mount lenses Micro Four Thirds lenses
    Launch Date August 2007 October 2013
    Launch Price USD 7,999 USD 749
    Sensor Specs Canon 1Ds Mark III Panasonic GM1
    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 1080/60i Video
    ISO Setting 100 - 1,600 ISO 200 - 25,600 ISO
    ISO Boost 50 - 3,200 ISO 125 - 25,600 ISO
    Image Processor DIGIC III (Dual) Venus IX
    DXO Sensor Quality (score) 80 66
    DXO Color Depth (bits) 24.0 22.3
    DXO Dynamic Range (EV) 12.0 11.7
    DXO Low Light (ISO) 1663 660
    Screen Specs Canon 1Ds Mark III Panasonic GM1
    Viewfinder Type Optical viewfinder no viewfinder
    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 3.0inch 3.0inch
    LCD Resolution 230k dots 1036k dots
    LCD Attachment Fixed screen Fixed screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Canon 1Ds Mark III Panasonic GM1
    Focus System Phase-detect AF Contrast-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/500s
    Continuous Shooting 5 shutter flaps/s 5 shutter flaps/s
    Electronic Shutterno E-Shutterup to 1/16000s
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Fill Flash no On-Board Flash Built-in Flash
    Storage Medium CF or SDHC cards SDXC cards
    Single or Dual Card Slots Dual card slots Single card slot
    UHS card support no UHS-I
    Connectivity Specs Canon 1Ds Mark III Panasonic GM1
    External Flash Hotshoe no Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 2.0 USB 2.0
    HDMI Port no HDMI micro HDMI
    Wifi Support no Wifi Wifi built-in
    Body Specs Canon 1Ds Mark III Panasonic GM1
    Environmental SealingWeathersealed bodynot weather sealed
    Battery Type Canon LP-E4 Panasonic DMW-BLH7
    Battery Life (CIPA)1800 shots per charge230 shots per charge
    Body Dimensions 150 x 160 x 80 mm
    (5.9 x 6.3 x 3.1 in)
    99 x 55 x 30 mm
    (3.9 x 2.2 x 1.2 in)
    Camera Weight 1385 g (48.9 oz) 204 g (7.2 oz)
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    Check 1Ds Mark III offers at
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    Check GM1 offers at
    ebay.com

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