Canon 1D Mark III vs SX520

The Canon EOS-1D Mark III and the Canon PowerShot SX520 HS are two digital cameras that were announced, respectively, in February 2007 and July 2014. The 1D Mark III is a DSLR, while the SX520 is a fixed lens compact. The cameras are based on an APS-H (1D Mark III) and a 1/2.3-inch (SX520) sensor. The 1D Mark III has a resolution of 10.1 megapixels, whereas the SX520 provides 15.9 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 SX520
Digital single lens reflex		Fixed lens compact camera
Canon EF mount lenses		24-1008mm f/3.4-6
10.1 MP, APS-H Sensor		15.9 MP, 1/2.3" Sensor
no Video		1080/30p Video
ISO 100-3200 (50-6400)		ISO 100-3200
Optical viewfinder		No viewfinder, LCD framing
3.0" LCD, 230k dots		3.0" LCD, 461k dots
Fixed screen (not touch-sensitive)		Fixed screen (not touch-sensitive)
10 shutter flaps per second		1.6 shutter flaps per second
Weathersealed body		Not weather sealed
2200 shots per battery charge		210 shots per battery charge
156 x 157 x 80 mm, 1155 g		120 x 82 x 92 mm, 441 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS-1D Mark III and the Canon PowerShot SX520 HS? 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 SX520 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 width, height and depth measures 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 SX520 is considerably smaller (60 percent) than the Canon 1D Mark III. It is worth mentioning in this context that the 1D Mark III is splash and dust resistant, while the SX520 does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the SX520 has a lens built in, whereas the 1D Mark III is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can compare the optics available for the 1D Mark III and their specifications in the Canon EF Lens Catalog.

Concerning battery life, the 1D Mark III gets 2200 shots out of its LP-E4 battery, while the SX520 can take 210 images on a single charge of its NB-6LH 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.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. In case you want to display and compare another camera duo, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.

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 SX520«	4.7 in	3.2 in	3.6 in	15.6 oz	210	n	Jul 2014	399	-		Canon SX520
	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 SX530« »	4.7 in	3.2 in	3.6 in	15.6 oz	210	n	Jan 2015	429	-		Canon SX530
	Canon SX60« »	5.0 in	3.7 in	4.5 in	22.9 oz	340	n	Sep 2014	549	-		Canon SX60
	Canon T5« »	5.1 in	3.9 in	3.1 in	16.9 oz	500	n	Feb 2014	449	-		Canon T5
	Canon SX510« »	4.1 in	2.8 in	3.1 in	12.3 oz	250	n	Aug 2013	249	-		Canon SX510
	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 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 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 B600« »	4.8 in	3.2 in	3.9 in	17.6 oz	280	n	Jan 2019	349			Nikon B600
	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.

Any camera decision will obviously take relative prices into account. 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 SX520 was launched at a lower price than the 1D Mark III, despite having a lens built in. 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.

Sensor comparison

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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its 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 Canon SX520 a 1/2.3-inch sensor. The sensor area in the SX520 is 95 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.3 and 5.6. The sensor in the 1D Mark III has a native 3:2 aspect ratio, while the one in the SX520 offers a 4:3 aspect.

Technology-wise, the SX520 uses a more advanced image processing engine (DIGIC 4+) than the 1D Mark III (DIGIC III), with benefits for noise reduction, color accuracy, and processing speed.

Despite having a smaller sensor, the SX520 offers a higher resolution of 15.9 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 1.33μm versus 7.21μm for the 1D Mark III). However, it should be noted that the SX520 is much more recent (by 7 years and 5 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 SX520 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Canon SX520 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the SX520 for good quality output (200 dots per inch) amounts to 23 x 17.3 inch or 58.5 x 43.9 cm, for very good quality (250 dpi) 18.4 x 13.8 inch or 46.8 x 35.1 cm, and for excellent quality (300 dpi) 15.4 x 11.5 inch or 39 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 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 PowerShot SX520 HS are ISO 100 to ISO 3200 (no boost).

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"). The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

Many modern cameras cannot only take still pictures, but also record videos. The SX520 indeed provides for movie recording, while the 1D Mark III does not. The highest resolution format that the SX520 can use is 1080/30p.

Feature comparison

Apart from 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 SX520 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 Canon SX520 in connection with corresponding information for a sample of similar cameras.

One feature that is present on the 1D Mark III, but is missing on the SX520 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 SX520 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 SX520 only has one slot.

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 PowerShot SX520 HS and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

It is notable that the 1D Mark III has a hotshoe, while the SX520 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 1D Mark III (unlike the SX520) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the 1D Mark III and the SX520 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 SX520 was followed by the Canon SX530. 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 how do things add up? Is there a clear favorite between the Canon 1D Mark III and the Canon SX520? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.

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 image quality: Features bigger pixels on a larger sensor for higher quality imaging.
• Richer colors: The pixel size advantage translates into images with better, more accurate colors.
• More dynamic range: Larger pixels capture a wider spectrum of light and dark details.
• Better low-light sensitivity: Larger pixels means good image quality even under poor lighting.
• 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 1/2000s) to freeze action.
• Faster burst: Shoots at higher frequency (10 vs 1.6 flaps/sec) to capture the decisive moment.
• More flexible: Can take a variety of interchangeable lenses, including specialty optics.
• 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.
• 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 PowerShot SX520 HS:

• More detail: Has more megapixels (15.9 vs 10.1MP), which boosts linear resolution by 23%.
• Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
• Better jpgs: Has a more modern image processing engine (DIGIC 4+ vs DIGIC III).
• Broader imaging potential: Can capture not only stills but also 1080/30p video.
• More detailed LCD: Has a higher resolution rear screen (461k vs 230k dots).
• Ready to shoot: Comes with an integrated lens, while the 1D Mark III requires a separate lens.
• More compact: Is smaller (120x82mm vs 156x157mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight even though it has a lens built in (unlike the 1D Mark III).
• Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
• Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
• More affordable: Was introduced at a lower price, despite coming with a built-in lens.
• More modern: Reflects 7 years and 5 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 1D Mark III is the clear winner of the match-up (17 : 12 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 wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro 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 SX520 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Superzoom 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 remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the 1D Mark III or the SX520. 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 (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 SX520«	+	-	3.5/5	-	3.5/5	Jul 2014	399	-		Canon SX520
	Canon 5DS R« »	+	83/100	5/5	5/5	4.5/5	Feb 2015	3,699			Canon 5DS R
	Canon SX530« »	+ +	-	4/5	-	4/5	Jan 2015	429	-		Canon SX530
	Canon SX60« »	+ +	75/100	4/5	-	4.5/5	Sep 2014	549	-		Canon SX60
	Canon T5« »	+	-	4/5	4/5	4.5/5	Feb 2014	449	-		Canon T5
	Canon SX510« »	+ +	-	4.5/5	-	4/5	Aug 2013	249	-		Canon SX510
	Canon 5D Mark III« »	+ +	82/100	4.5/5	5/5	4.5/5	Mar 2012	3,499	-		Canon 5D Mark III
	Canon 1D Mark IV« »	-	89/100	-	5/5	-	Oct 2009	4,999	-		Canon 1D Mark IV
	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 B600« »	+	-	3.5/5	-	3/5	Jan 2019	349			Nikon B600
	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.

Care should be taken when interpreting the review scores above, 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, 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? If you would like to see a different side-by-side camera review, just use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

Specifications: Canon 1D Mark III vs Canon SX520

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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