Canon 1D Mark III vs 650D

The Canon EOS-1D Mark III and the Canon EOS 650D (labelled Canon T4i in some countries) are two digital cameras that were announced, respectively, in February 2007 and June 2012. Both are DSLR (Digital Single Lens Reflex) cameras that are based on an APS-H (1D Mark III) and an APS-C (650D) sensor. The 1D Mark III has a resolution of 10.1 megapixels, whereas the 650D provides 17.9 MP.

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

Headline Specifications

Canon 1D Mark III		Canon 650D
Digital single lens reflex		Digital single lens reflex
Canon EF mount lenses		Canon EF mount lenses
10.1 MP, APS-H Sensor		17.9 MP, APS-C Sensor
no Video		1080/30p Video
ISO 100-3200 (50-6400)		ISO 100-12800 (100-25600)
Optical viewfinder		Optical viewfinder
3.0" LCD, 230k dots		3.0" LCD, 1040k dots
Fixed screen (not touch-sensitive)		Swivel touchscreen
10 shutter flaps per second		5 shutter flaps per second
Weathersealed body		Not weather sealed
2200 shots per battery charge		440 shots per battery charge
156 x 157 x 80 mm, 1155 g		133 x 100 x 79 mm, 575 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS-1D Mark III and the Canon EOS 650D? 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 1D Mark III and the Canon 650D 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 width, height and depth dimensions are rounded to the nearest millimeter.

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon 650D is considerably smaller (46 percent) than the Canon 1D Mark III. Moreover, the 650D is substantially lighter (50 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 650D 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 1D Mark III) will tend to go along with bigger and heavier lenses, while more compact options are available for the smaller-sensor camera (650D). You can compare the optics available in the Canon EF Lens Catalog.

Concerning battery life, the 1D Mark III gets 2200 shots out of its LP-E4 battery, while the 650D can take 440 images on a single charge of its LP-E8 power pack. As can be seen in the images above, the 1D Mark III has a battery grip built in. This facilitates image-taking in portrait orientation and gives it additional battery power. In order to provide similar functionality for the 650D, Canon provides the BG-E8 vertical grip as an optional accessory (see here on eBay).

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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	-		Canon 1D Mark III
	Canon 650D«	5.2 in	3.9 in	3.1 in	20.3 oz	440	n	Jun 2012	849	-		Canon 650D
	Canon 5DS R« »	6.0 in	4.6 in	3.0 in	32.8 oz	700	Y	Feb 2015	3,699			Canon 5DS R
	Canon 700D« »	5.2 in	3.9 in	3.1 in	20.5 oz	440	n	Mar 2013	649	-		Canon 700D
	Canon 5D Mark III« »	6.0 in	4.6 in	3.0 in	33.5 oz	950	Y	Mar 2012	3,499	-		Canon 5D Mark III
	Canon G1 X« »	4.6 in	3.2 in	2.6 in	18.8 oz	250	n	Jan 2012	799	-		Canon G1 X
	Canon 600D« »	5.2 in	3.9 in	3.1 in	20.1 oz	440	n	Feb 2011	599	-		Canon 600D
	Canon 550D« »	5.1 in	3.9 in	2.4 in	18.7 oz	440	n	Feb 2010	699	-		Canon 550D
	Canon 1D Mark IV« »	6.1 in	6.2 in	3.1 in	43.4 oz	1500	Y	Oct 2009	4,999	-		Canon 1D Mark IV
	Canon 500D« »	5.1 in	3.9 in	2.4 in	18.3 oz	400	n	Mar 2009	799	-		Canon 500D
	Canon 5D Mark II« »	6.0 in	4.5 in	3.0 in	30.0 oz	850	Y	Sep 2008	3,499	-		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	-		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	-		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	-		Canon 1D Mark II
	Canon 1Ds« »	6.1 in	6.2 in	3.1 in	44.6 oz	600	Y	Sep 2002	8,999	-		Canon 1Ds
	Nikon D3« »	6.3 in	6.2 in	3.5 in	45.9 oz	4300	Y	Aug 2007	4,999	-		Nikon D3
	Nikon D2Xs« »	6.2 in	5.9 in	3.4 in	44.2 oz	3800	Y	Jun 2006	4,699	-		Nikon D2Xs
Convert to Metric
Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.

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 650D was launched at a markedly lower price (by 81 percent) than the 1D 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 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. 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 1D Mark III features an APS-H sensor and the Canon 650D an APS-C sensor. The sensor area in the 650D is 37 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.3 and 1.6. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Technology-wise, the 650D uses a more advanced image processing engine (DIGIC 5) than the 1D Mark III (DIGIC III), with benefits for noise reduction, color accuracy, and processing speed.

Despite having a smaller sensor, the 650D offers a higher resolution of 17.9 megapixels, compared with 10.1 MP of the 1D Mark III. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 4.31μm versus 7.21μm for the 1D Mark III). However, it should be noted that the 650D is much more recent (by 5 years and 3 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.

The resolution advantage of the Canon 650D implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 650D for good quality output (200 dots per inch) amounts to 25.9 x 17.3 inch or 65.8 x 43.9 cm, for very good quality (250 dpi) 20.7 x 13.8 inch or 52.7 x 35.1 cm, and for excellent quality (300 dpi) 17.3 x 11.5 inch or 43.9 x 29.3 cm. The corresponding values for the Canon 1D Mark III are 19.4 x 13 inch or 49.4 x 32.9 cm for good quality, 15.6 x 10.4 inch or 39.5 x 26.3 cm for very good quality, and 13 x 8.6 inch or 32.9 x 21.9 cm for excellent quality prints.

The 650D has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Canon EOS-1D Mark III has a native sensitivity range from ISO 100 to ISO 3200, which can be extended to ISO 50-6400. The corresponding ISO settings for the Canon EOS 650D are ISO 100 to ISO 12800, with the possibility to increase the ISO range to 100-25600.

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. Of the two cameras under review, the 1D Mark III has a notably higher overall DXO score than the 650D (overall score 9 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 1 bits higher color depth, 0.5 EV in additional dynamic range, and 0.6 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.

Many modern cameras cannot only take still pictures, but also record videos. The 650D indeed provides for movie recording, while the 1D Mark III does not. The highest resolution format that the 650D can use is 1080/30p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. The 1D Mark III and the 650D 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 viewfinder in the 1D Mark III offers a wider field of view (100%) than the one in the 650D (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the 1D Mark III has a higher magnification (0.58x vs 0.53x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Canon 1D Mark III and Canon 650D along with similar information for a selection of comparators.

One feature that is present on the 1D Mark III, but is missing on the 650D 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 1D Mark III writes its imaging data to Compact Flash or SDHC cards, while the 650D 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 650D only has one slot. The 650D supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the 1D 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-1D Mark III and Canon EOS 650D and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

Studio photographers will appreciate that the Canon 1D Mark III (unlike the 650D) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the 1D Mark III and the 650D have been discontinued, but can regularly be found used on eBay. The 1D Mark III was replaced by the Canon 1D Mark IV, while the 650D was followed by the Canon 700D. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon website.

Review summary

So what conclusions can be drawn? Is there a clear favorite between the Canon 1D Mark III and the Canon 650D? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.

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

• Better image quality: Scores markedly higher (9 points) in the DXO overall assessment.
• Better low-light sensitivity: Requires less light for good images (0.6 stops ISO advantage).
• More complete view: Has a viewfinder with a larger field of view (100% vs 95%).
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.58x vs 0.53x).
• 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 (10 vs 5 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 (2200 versus 440) 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.
• 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).

Advantages of the Canon EOS 650D:

• More detail: Has more megapixels (17.9 vs 10.1MP), which boosts linear resolution by 33%.
• Better jpgs: Has a more modern image processing engine (DIGIC 5 vs DIGIC III).
• Broader imaging potential: Can capture not only stills but also 1080/30p video.
• Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
• More detailed LCD: Has a higher resolution rear screen (1040k vs 230k dots).
• More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
• Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
• More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
• More compact: Is smaller (133x100mm vs 156x157mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight (by 580g or 50 percent) and is thus easier to take along.
• 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 (81 percent cheaper at launch).
• More modern: Reflects 5 years and 3 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 650D comes out slightly ahead of the 1D Mark III (14 : 13 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. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

How about other alternatives? Do the specifications of the Canon 1D Mark III and the Canon 650D place the cameras among the top in their class? Find out in the latest Best DSLR Camera listing 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 1D Mark III and the 650D in practical situations. 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.

Expert reviews

This is where reviews by experts come in. The adjacent summary-table relays the overall verdicts of several of the most popular 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						Camera Launch (announced)	Launch Price (USD)	Street Price (USD)	Used Price (USD)	Camera Model
	Canon 1D Mark III»	-	-	-	o	-	Feb 2007	4,499	-		Canon 1D Mark III
	Canon 650D«	+ +	77/100	4.5/5	4.5/5	4.5/5	Jun 2012	849	-		Canon 650D
	Canon 5DS R« »	+	83/100	5/5	5/5	4.5/5	Feb 2015	3,699			Canon 5DS R
	Canon 700D« »	-	76/100	4.5/5	4.5/5	4.5/5	Mar 2013	649	-		Canon 700D
	Canon 5D Mark III« »	+ +	82/100	4.5/5	5/5	4.5/5	Mar 2012	3,499	-		Canon 5D Mark III
	Canon G1 X« »	+	76/100	4/5	4/5	4.5/5	Jan 2012	799	-		Canon G1 X
	Canon 600D« »	o	77/100	4.5/5	5/5	4.5/5	Feb 2011	599	-		Canon 600D
	Canon 550D« »	+ +	77/100	4/5	5/5	4.5/5	Feb 2010	699	-		Canon 550D
	Canon 1D Mark IV« »	-	89/100	-	5/5	-	Oct 2009	4,999	-		Canon 1D Mark IV
	Canon 500D« »	+ +	74/100	4.5/5	5/5	4.5/5	Mar 2009	799	-		Canon 500D
	Canon 5D Mark II« »	91/100	79/100	4/5	5/5	-	Sep 2008	3,499	-		Canon 5D Mark II
	Canon 1Ds Mark III« »	-	+ +	4.5/5	-	-	Aug 2007	7,999	-		Canon 1Ds Mark III
	Canon 1D Mark II N« »	-	-	-	-	-	Aug 2005	3,999	-		Canon 1D Mark II N
	Canon 1D Mark II« »	-	+ +	-	o	-	Jan 2004	4,499	-		Canon 1D Mark II
	Canon 1Ds« »	-	+ +	-	-	-	Sep 2002	8,999	-		Canon 1Ds
	Nikon D3« »	-	+ +	5/5	o	4.5/5	Aug 2007	4,999	-		Nikon D3
	Nikon D2Xs« »	-	-	-	o	-	Jun 2006	4,699	-		Nikon D2Xs
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (-) not available.

The review scores listed above should be treated 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. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

Other camera comparisons

Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

Specifications: Canon 1D Mark III vs Canon 650D

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.

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