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Canon 1Ds Mark III versus Canon SL1

The Canon EOS-1Ds Mark III and the Canon EOS Rebel SL1 (labelled Canon 100D in some countries) are two digital cameras that were revealed to the public, respectively, in August 2007 and March 2013. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a full frame (1Ds Mark III) and an APS-C (SL1) sensor. The 1Ds Mark III has a resolution of 21 megapixel, whereas the SL1 provides 17.9 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 1Ds Mark III vs Canon SL1

An illustration of the physical size and weight of the Canon 1Ds Mark III and the Canon SL1 is provided 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 size dimensions are rounded to the nearest millimeter. If you prefer, you can also use the toggle button to switch to a comparison in percentage terms (in this case, the camera on the left – the 1Ds Mark III – represents the basis or 100 percent across all the size and weight measures).

Compare Canon 1Ds Mark III vs Canon SL1
Compare 1Ds Mark III versus SL1 top
Compare 1Ds Mark III and SL1 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon SL1 is considerably smaller (56 percent) than the Canon 1Ds Mark III. Moreover, the SL1 is substantially lighter (71 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 SL1 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 (as in the 1Ds Mark III) will tend to go along with bigger and heavier lenses, while more compact options are available for the smaller-sensor camera (SL1). You can find a comprehensive overview of suitable optics in the Canon EF Lens Catalog.

Concerning battery life, the 1Ds Mark III gets 1800 shots out of its LP-E4 battery, while the SL1 can take 380 images on a single charge of its LP-E12 power pack. As can be seen in the images above, the 1Ds Mark III has a battery grip build in. This facilitates image-taking in portrait orientation and gives it additional battery power. In order to provide similar functionality for the SL1, there are third party battery grips available as optional accessories (see here on eBay).

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 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 SL1« 4.6 in 3.6 in 2.7 in 14.4 oz 380 n Mar 2013 549- i Canon SL1
Canon SL2« » 4.8 in 3.7 in 2.8 in 16.0 oz 650 n Jun 2017 549 i i Canon SL2
Canon 1D X Mark II« » 6.2 in 6.6 in 3.3 in 54.0 oz 1210 Y Feb 2016 5,999 i i Canon 1D X Mark II
Canon T6« » 5.1 in 4.0 in 3.1 in 17.1 oz 500 n Mar 2016 449- i Canon T6
Canon M10« » 4.3 in 2.6 in 1.4 in 10.6 oz 255 n Oct 2015 499- i Canon M10
Canon T5« » 5.1 in 3.9 in 3.1 in 16.9 oz 500 n Feb 2014 449- i Canon T5
Canon T5i« » 5.2 in 3.9 in 3.1 in 20.5 oz 440 n Mar 2013 649- i Canon T5i
Canon 1D C« » 6.2 in 6.5 in 3.3 in 54.5 oz 1120 Y Apr 2012 14,999- i Canon 1D C
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 6D« » 5.7 in 4.4 in 2.8 in 27.2 oz 1090 Y Sep 2012 2,099- i Canon 6D
Canon 1D X« » 6.2 in 6.6 in 3.3 in 54.7 oz 1120 Y Oct 2011 6,799- i Canon 1D X
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 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
Canon 1Ds Mark II« » 6.1 in 6.2 in 3.1 in 42.9 oz 1200 Y Sep 2004 7,999- i Canon 1Ds 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 D3X« » 6.3 in 6.2 in 3.5 in 44.4 oz 4400 Y Dec 2008 7,999- i Nikon D3X

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 SL1 was launched at a markedly lower price (by 93 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: Canon 1Ds Mark III vs Canon SL1

The size of the imaging sensor is a crucial determinant of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and 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 tend to be associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Canon 1Ds Mark III features a full frame sensor and the Canon SL1 an APS-C sensor. The sensor area in the SL1 is 62 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 1.6. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Canon 1Ds Mark III and Canon SL1 sensor measures

With 21MP, the 1Ds Mark III offers a higher resolution than the SL1 (17.9MP), but the 1Ds Mark III nevertheless has larger individual pixels (pixel pitch of 6.41μm versus 4.31μm for the SL1) due to its larger sensor. However, the SL1 is a somewhat more recent model (by 5 years and 7 months) than the 1Ds Mark III, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels.

1Ds Mark III versus SL1 MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 1Ds Mark III provides substantially higher image quality than the SL1, with an overall score that is 17 points higher. This advantage is based on 2.2 bits higher color depth, 0.7 EV in additional dynamic range, and 1 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.

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 3744-24.012.0166380Canon 1Ds Mark III
Canon SL1« APS-C 17.9 5184 34561080/30p21.811.384363Canon SL1
Canon SL2« » APS-C 24.0 6000 40001080/60p23.613.4104179Canon SL2
Canon 1D X Mark II« » Full Frame 20.0 5472 36484K/60p24.113.5320788Canon 1D X Mark II
Canon T6« » APS-C 17.9 5184 34561080/30p----Canon T6
Canon M10« » APS-C 17.9 5184 34561080/30p22.211.475365Canon M10
Canon T5« » APS-C 17.9 5184 34561080/30p21.911.372463Canon T5
Canon T5i« » APS-C 17.9 5184 34561080/30p21.711.268161Canon T5i
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 6D« » Full Frame 20.0 5472 36481080/30p23.812.1234082Canon 6D
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 2592-22.711.7107871Canon 1D Mark III
Canon 1Ds Mark II« » Full Frame 16.6 4992 3328-23.311.3148074Canon 1Ds Mark II
Canon 1Ds« » Full Frame 11.0 4064 2704-21.811.095463Canon 1Ds
Nikon D3X« » Full Frame 24.4 6048 4032-24.713.7199288Nikon D3X

Many modern cameras cannot only take still pictures, but also record videos. The SL1 indeed provides for movie recording, while the 1Ds Mark III does not. The highest resolution format that the SL1 can use is 1080/30p.

 

Feature comparison: Canon 1Ds Mark III vs Canon SL1

Apart from body and sensor, cameras can and do differ across a range of features. The 1Ds Mark III and the SL1 are similar in the sense that both have an optical viewfinder. The latter is useful for getting a clear image for framing even in brightly lit environments. The adjacent table lists some of the other core features of the Canon 1Ds Mark III and Canon SL1 along with similar information for a selection of comparators. If you need more detail on the specs, you can find comprehensive listings, for example, in the dpreview camera hub.

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 1Ds Mark III»optical Y 3.0 230 fixed n 8000 5.0 n n Canon 1Ds Mark III
Canon SL1«optical n 3.0 1040 fixed Y 4000 4.9 Y n Canon SL1
Canon SL2« »optical n 3.0 1040 swivel Y 4000 5.0 Y n Canon SL2
Canon 1D X Mark II« »optical Y 3.2 1620 fixed Y 8000 16.0 n n Canon 1D X Mark II
Canon T6« »optical n 3.0 920 fixed n 4000 3.0 Y n Canon T6
Canon M10« »- n 3.0 1040 tilting Y 4000 4.6 Y n Canon M10
Canon T5« »optical n 3.0 460 fixed n 4000 3.0 Y n Canon T5
Canon T5i« »optical n 3.0 1040 swivel Y 4000 5.0 Y n Canon T5i
Canon 1D C« »optical Y 3.2 1040 fixed n 8000 14.0 n n Canon 1D C
Canon 5D Mark III« »optical Y 3.2 1040 fixed n 8000 6.0 n n Canon 5D Mark III
Canon 6D« »optical Y 3.0 1040 fixed n 4000 4.5 n n Canon 6D
Canon 1D X« »optical Y 3.2 1040 fixed n 8000 14.0 n n Canon 1D X
Canon 5D Mark II« »optical Y 3.0 920 fixed n 8000 3.9 n n Canon 5D Mark II
Canon 1D Mark III« »optical Y 3.0 230 fixed n 8000 10.0 n n Canon 1D Mark III
Canon 1Ds Mark II« »optical Y 2.0 230 fixed n 8000 4.0 n n Canon 1Ds Mark II
Canon 1Ds« »optical Y 2.0 120 fixed n 8000 3.0 n n Canon 1Ds
Nikon D3X« »optical Y 3.0 922 fixed n 8000 5.0 n n Nikon D3X

One feature that is present on the 1Ds Mark III, but is missing on the SL1 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 cards, while the SL1 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 SL1 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 1Ds Mark III»Y-----2.0---Canon 1Ds Mark III
Canon SL1«YmonomonoY-mini2.0---Canon SL1
Canon SL2« »YstereomonoY-mini2.0YYYCanon SL2
Canon 1D X Mark II« »YmonomonoYYmini3.0---Canon 1D X Mark II
Canon T6« »Ymonomono--mini2.0YY-Canon T6
Canon M10« »-stereomono--mini2.0YY-Canon M10
Canon T5« »Ymonomono--mini2.0---Canon T5
Canon T5i« »YstereomonoY-mini2.0---Canon T5i
Canon 1D C« »YmonomonoYYmini2.0---Canon 1D C
Canon 5D Mark III« »YmonomonoYYmini2.0---Canon 5D Mark III
Canon 6D« »YmonomonoY-mini2.0Y--Canon 6D
Canon 1D X« »Ymono-Y-mini2.0---Canon 1D X
Canon 5D Mark II« »YmonomonoY-mini2.0---Canon 5D Mark II
Canon 1D Mark III« »Y-----2.0---Canon 1D Mark III
Canon 1Ds Mark II« »Y-----2.0---Canon 1Ds Mark II
Canon 1Ds« »Y-----FW---Canon 1Ds
Nikon D3X« »Y----mini2.0---Nikon D3X

Both the 1Ds Mark III and the SL1 have been discontinued, but can regularly be found used on eBay. The 1Ds Mark III was replaced by the Canon 1DX, while the SL1 was followed by the Canon SL2.

Review summary: Canon 1Ds Mark III vs Canon SL1

So what is the bottom line? Which of the two cameras – the Canon 1Ds Mark III or the Canon SL1 – has the upper hand? Below is a summary of the relative strengths of each of the two contestants.


Arguments in favor of the Canon EOS-1Ds Mark III:

  • More detail: Offers more megapixels (21 vs 17.9MP) with a 8% higher linear resolution.
  • Better image quality: Scores substantially higher (17 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (2.2 bits more color depth).
  • More dynamic range: Captures a larger spectrum of light and dark details (0.7 EV of extra DR).
  • Better low-light sensitivity: Requires less light for good images (1 stops ISO advantage).
  • Easier setting verification: Features an LCD display on top to control shooting parameters.
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
  • More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
  • Longer lasting: Can take more shots (1800 versus 380) on a single battery charge.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • 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).


Advantages of the Canon EOS Rebel SL1:

  • Broader imaging potential: Can capture not only stills but also 1080/30p video.
  • More detailed LCD: Has a higher resolution rear screen (1040k vs 230k dots).
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • More compact: Is smaller (117x91mm vs 150x160mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 978g or 71 percent) and is thus easier to take along.
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • More affordable: Was introduced into a lower priced category (93 percent cheaper at launch).
  • More modern: Reflects 5 years and 7 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 (12 : 8 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.

1Ds Mark III 12:08 SL1

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the 1Ds Mark III and the SL1 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. This is where reviews by experts come in. The table below summarizes the assessments of some of the best known camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). You can find the full text of the reviews 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 1Ds Mark III»-HiRec4.5/5-- Aug 2007 7,999- i Canon 1Ds Mark III
Canon SL1«Rec78/1004/54/54/5 Mar 2013 549- i Canon SL1
Canon SL2« »HiRec78/1004.5/54.5/54.5/5 Jun 2017 549 i i Canon SL2
Canon 1D X Mark II« »-89/1004.5/55/54.5/5 Feb 2016 5,999 i i Canon 1D X Mark II
Canon T6« »rev73/1004/53.5/54/5 Mar 2016 449- i Canon T6
Canon M10« »---rev4/5 Oct 2015 499- i Canon M10
Canon T5« »Rec-4/54/54.5/5 Feb 2014 449- i Canon T5
Canon T5i« »-76/1004.5/54.5/54.5/5 Mar 2013 649- i Canon T5i
Canon 1D C« »----- Apr 2012 14,999- i Canon 1D C
Canon 5D Mark III« »HiRec82/1004.5/55/54.5/5 Mar 2012 3,499- i Canon 5D Mark III
Canon 6D« »HiRec83/1004.5/54.5/54.5/5 Sep 2012 2,099- i Canon 6D
Canon 1D X« »--4.5/54.5/54.5/5 Oct 2011 6,799- i Canon 1D X
Canon 5D Mark II« »91/10079/1004/55/5- Sep 2008 3,499- i Canon 5D Mark II
Canon 1D Mark III« »---rev- Feb 2007 4,499- i Canon 1D Mark III
Canon 1Ds Mark II« »-HiRec--- Sep 2004 7,999- i Canon 1Ds Mark II
Canon 1Ds« »-HiRec--- Sep 2002 8,999- i Canon 1Ds
Nikon D3X« »-86/1004/55/55/5 Dec 2008 7,999- i Nikon D3X

The above review scores should be interpreted with care, though. The assessments were made in relation to similar cameras of the same technological generation. Thus, a score needs to be put into the context of the launch date and the launch price 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, please note that some of the review sites have changed their methodology and reporting over time.

 

Other camera comparisons

Did this review help to inform your camera decision process? 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 cannot find the camera you are interested in, kindly get in touch, and I will try to update the database with the necessary infos.

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