Nikon D300 vs Canon 20D

The Nikon D300 and the Canon EOS 20D are two enthusiast cameras that were officially introduced, respectively, in August 2007 and August 2004. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The Nikon has a resolution of 12.2 megapixels, whereas the Canon provides 8.2 MP.

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

Headline Specifications

Nikon D300		Canon 20D
Digital single lens reflex		Digital single lens reflex
Nikon F mount lenses		Canon EF mount lenses
12.2 MP – APS-C sensor		8.2 MP – APS-C sensor
no Video		no Video
ISO 200-3,200 (100 - 6,400)		ISO 100-1,600 (100 - 3,200)
Optical viewfinder		Optical viewfinder
3.0" LCD – 922k dots		1.8" LCD – 118k dots
Fixed screen (not touch-sensitive)		Fixed screen (not touch-sensitive)
6 shutter flaps per second		5 shutter flaps per second
Weathersealed body		not weather sealed
1000 shots per battery charge		700 shots per battery charge
147 x 114 x 74 mm, 925 g		144 x 106 x 72 mm, 770 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D300 and the Canon EOS 20D? 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

The side-by-side display below illustrates the physical size and weight of the Nikon D300 and the Canon 20D. 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.

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon 20D is notably smaller (9 percent) than the Nikon D300. Moreover, the 20D is markedly lighter (17 percent) than the D300. It is worth mentioning in this context that the D300 is splash and dust resistant, while the 20D 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. Yet, since both cameras are based around an APS-C sensor, their respective lenses will tend to have similar dimensions and heft. You can compare the optics available for the two cameras in the Nikon Lens Catalog (D300) and the Canon EF Lens Catalog (20D).

Concerning battery life, the D300 gets 1000 shots out of its Nikon EN-EL3e battery, while the 20D can take 700 images on a single charge of its Canon BP-511A power pack.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

Body Specifications

		Camera Model	Camera Width	Camera Height	Camera Depth	Camera Weight	Battery Life	Weather Sealing	Camera Launch	Launch Price (USD)	Street Price
1.		Nikon D300	147 mm	114 mm	74 mm	925 g	1000	Y	Aug 2007	1,799	ebay.com
2.		Canon 20D	144 mm	106 mm	72 mm	770 g	700	n	Aug 2004	1,499	ebay.com
3.		Canon 10D	150 mm	107 mm	75 mm	850 g	500	n	Feb 2003	1,999	ebay.com
4.		Canon 30D	144 mm	106 mm	74 mm	785 g	750	n	Feb 2006	1,399	ebay.com
5.		Canon 40D	146 mm	108 mm	74 mm	822 g	750	n	Aug 2007	1,299	ebay.com
6.		Canon Rebel	142 mm	99 mm	72 mm	649 g	400	n	Aug 2003	899	ebay.com
7.		Canon XT	127 mm	94 mm	64 mm	540 g	400	n	Feb 2005	899	ebay.com
8.		Nikon D2X	158 mm	150 mm	86 mm	1252 g	3800	Y	Sep 2004	4,999	ebay.com
9.		Nikon D2Xs	158 mm	150 mm	86 mm	1252 g	3800	Y	Jun 2006	4,699	ebay.com
10.		Nikon D40X	124 mm	94 mm	64 mm	522 g	520	n	Mar 2007	729	ebay.com
11.		Nikon D60	126 mm	94 mm	64 mm	522 g	500	n	Jan 2008	629	ebay.com
12.		Nikon D80	132 mm	103 mm	77 mm	668 g	600	n	Aug 2006	999	ebay.com
13.		Nikon D90	132 mm	103 mm	77 mm	703 g	850	n	Aug 2008	1,299	ebay.com
14.		Nikon D200	147 mm	113 mm	74 mm	920 g	400	Y	Nov 2005	1,699	ebay.com
15.		Nikon D300S	147 mm	115 mm	81 mm	938 g	950	Y	Jul 2009	1,799	ebay.com
16.		Nikon D700	147 mm	123 mm	77 mm	1074 g	1000	Y	Jul 2008	2,999	ebay.com
17.		Nikon D7000	132 mm	105 mm	77 mm	780 g	1050	Y	Sep 2010	1,499	ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
Convert to Imperial

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 20D was launched at a somewhat lower price (by 17 percent) than the D300, which makes it more attractive for photographers on a tight budget. 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. 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 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 tend to be associated with larger, more expensive camera bodies and lenses.

Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the 20D is 9 percent smaller. As a result of these sensor size differences, the cameras have format factors, respectively, of 1.5 (D300) and 1.6. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

With 12.2MP, the D300 offers a higher resolution than the 20D (8.2MP), but the D300 has smaller individual pixels (pixel pitch of 5.53μm versus 6.42μm for the 20D). However, the D300 is a much more recent model (by 3 years) than the 20D, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixels.

The resolution advantage of the Nikon D300 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the D300 for good quality output (200 dots per inch) amounts to 21.4 x 14.2 inches or 54.5 x 36.2 cm, for very good quality (250 dpi) 17.2 x 11.4 inches or 43.6 x 28.9 cm, and for excellent quality (300 dpi) 14.3 x 9.5 inches or 36.3 x 24.1 cm. The corresponding values for the Canon 20D are 17.5 x 11.7 inches or 44.5 x 29.7 cm for good quality, 14 x 9.3 inches or 35.6 x 23.7 cm for very good quality, and 11.7 x 7.8 inches or 29.7 x 19.8 cm for excellent quality prints.

The Nikon D300 has a native sensitivity range from ISO 200 to ISO 3200, which can be extended to ISO 100-6400. The corresponding ISO settings for the Canon EOS 20D are ISO 100 to ISO 1600, with the possibility to increase the ISO range to 100-3200.

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.

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 D300 has a notably higher overall DXO score than the 20D (overall score 5 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 0.2 bits higher color depth, 1 EV in additional dynamic range, and 0.1 stops of reduced 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
1.		Nikon D300	APS-C	12.2	4288	2848	none	22.1	12.0	679	67
2.		Canon 20D	APS-C	8.2	3504	2336	none	21.9	11.0	721	62
3.		Canon 10D	APS-C	6.3	3072	2048	none	21.1	10.9	571	57
4.		Canon 30D	APS-C	8.2	3504	2336	none	21.5	10.8	736	59
5.		Canon 40D	APS-C	10.1	3888	2592	none	22.1	11.3	703	64
6.		Canon Rebel	APS-C	6.3	3072	2048	none	21.0	10.8	544	55
7.		Canon XT	APS-C	8.0	3456	2304	none	21.8	10.8	637	60
8.		Nikon D2X	APS-C	12.2	4288	2848	none	22.1	10.9	476	59
9.		Nikon D2Xs	APS-C	12.2	4288	2848	none	22.2	10.9	489	59
10.		Nikon D40X	APS-C	10.0	3872	2592	none	22.4	11.4	516	63
11.		Nikon D60	APS-C	10.0	3872	2592	none	22.5	11.4	562	65
12.		Nikon D80	APS-C	10.0	3872	2592	none	22.1	11.2	524	61
13.		Nikon D90	APS-C	12.2	4288	2848	720/24p	22.7	12.5	977	73
14.		Nikon D200	APS-C	10.0	3872	2592	none	22.3	11.5	583	64
15.		Nikon D300S	APS-C	12.2	4288	2848	720/24p	22.5	12.2	787	70
16.		Nikon D700	Full Frame	12.1	4256	2832	none	23.5	12.2	2303	80
17.		Nikon D7000	APS-C	16.1	4928	3264	1080/24p	23.5	13.9	1167	80

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The D300 and the 20D 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 D300 offers a wider field of view (100%) than the one in the 20D (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the D300 has a higher magnification (0.63x vs 0.56x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The table below summarizes some of the other core capabilities of the Nikon D300 and Canon 20D in connection with corresponding information for a sample of similar cameras.

Core Features

		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.		Nikon D300	optical	Y	3.0 / 922	fixed	n	1/8000s	6.0/s	Y	n
2.		Canon 20D	optical	Y	1.8 / 118	fixed	n	1/8000s	5.0/s	Y	n
3.		Canon 10D	optical	Y	1.8 / 118	fixed	n	1/4000s	3.0/s	Y	n
4.		Canon 30D	optical	Y	2.5 / 230	fixed	n	1/8000s	5.0/s	Y	n
5.		Canon 40D	optical	Y	3.0 / 230	fixed	n	1/8000s	6.5/s	Y	n
6.		Canon Rebel	optical	n	1.8 / 118	fixed	n	1/4000s	2.5/s	Y	n
7.		Canon XT	optical	n	1.8 / 115	fixed	n	1/4000s	3.0/s	Y	n
8.		Nikon D2X	optical	Y	2.5 / 235	fixed	n	1/8000s	5.0/s	n	n
9.		Nikon D2Xs	optical	Y	2.5 / 230	fixed	n	1/8000s	5.0/s	n	n
10.		Nikon D40X	optical	n	2.5 / 230	fixed	n	1/4000s	3.0/s	Y	n
11.		Nikon D60	optical	n	2.5 / 230	fixed	n	1/4000s	3.0/s	Y	n
12.		Nikon D80	optical	n	2.5 / 230	fixed	n	1/4000s	3.0/s	Y	n
13.		Nikon D90	optical	Y	3.0 / 920	fixed	n	1/4000s	4.5/s	Y	n
14.		Nikon D200	optical	Y	2.5 / 230	fixed	n	1/8000s	5.0/s	Y	n
15.		Nikon D300S	optical	Y	3.0 / 920	fixed	n	1/8000s	7.0/s	Y	n
16.		Nikon D700	optical	Y	3.0 / 922	fixed	n	1/8000s	8.0/s	Y	n
17.		Nikon D7000	optical	Y	3.0 / 921	fixed	n	1/8000s	6.0/s	Y	n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

The Nikon D300 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.

Concerning the storage of imaging data, both the D300 and the 20D write their files to Compact Flash 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 Nikon D300 and Canon EOS 20D 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 Mic / Speaker	Microphone Port	Headphone Port	HDMI Port	USB Port	WiFi Support	NFC Support	Bluetooth Support
1.		Nikon D300	Y	- / -	-	-	mini	2.0	-	-	-
2.		Canon 20D	Y	- / -	-	-	-	1.1	-	-	-
3.		Canon 10D	Y	- / -	-	-	-	1.1	-	-	-
4.		Canon 30D	Y	- / -	-	-	-	2.0	-	-	-
5.		Canon 40D	Y	- / -	-	-	-	2.0	-	-	-
6.		Canon Rebel	Y	- / -	-	-	-	1.1	-	-	-
7.		Canon XT	Y	- / -	-	-	-	2.0	-	-	-
8.		Nikon D2X	Y	- / -	-	-	-	2.0	-	-	-
9.		Nikon D2Xs	Y	- / -	-	-	-	2.0	-	-	-
10.		Nikon D40X	Y	- / -	-	-	-	2.0	-	-	-
11.		Nikon D60	Y	- / -	-	-	-	2.0	-	-	-
12.		Nikon D80	Y	- / -	-	-	-	2.0	-	-	-
13.		Nikon D90	Y	mono / mono	-	-	mini	2.0	-	-	-
14.		Nikon D200	Y	- / -	-	-	-	2.0	-	-	-
15.		Nikon D300S	Y	stereo / mono	Y	-	mini	2.0	-	-	-
16.		Nikon D700	Y	- / -	-	-	mini	2.0	-	-	-
17.		Nikon D7000	Y	mono / mono	Y	-	mini	2.0	-	-	-

Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.

Both the D300 and the 20D have been discontinued, but can regularly be found used on ebay. The 20D was replaced by the Canon 30D, while the D300 was followed by the Nikon D300S. Further information on the features and operation of the D300 and 20D can be found, respectively, in the Nikon D300 Manual (free pdf) or the online Canon 20D Manual.

Review summary

So how do things add up? Is there a clear favorite between the Nikon D300 and the Canon 20D? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

Reasons to prefer the Nikon D300:

• More detail: Offers more megapixels (12.2 vs 8.2MP) with a 22% higher linear resolution.
• Better image quality: Scores markedly higher (5 points) in the DXO overall assessment.
• More dynamic range: Captures a larger spectrum of light and dark details (1 EV of extra DR).
• 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 (0.63x vs 0.56x).
• Larger screen: Has a bigger rear LCD (3.0" vs 1.8") for image review and settings control.
• More detailed LCD: Has a higher resolution rear screen (922k vs 118k dots).
• Faster burst: Shoots at higher frequency (6 vs 5 flaps/sec) to capture the decisive moment.
• Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
• Longer lasting: Can take more shots (1000 versus 700) on a single battery charge.
• Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
• Faster data transfer: Supports a more advanced USB protocol (2.0 vs 1.1).
• More modern: Reflects 3 years of technical progress since the 20D launch.

Advantages of the Canon EOS 20D:

• Less heavy: Has a lower weight (by 155g or 17 percent) and is thus easier to take along.
• More affordable: Was released into a lower priced segment (17 percent cheaper at launch).
• More heavily discounted: Has been around for much longer (launched in August 2004).

If the number of relative strengths (bullet points above) is taken as a guide, the D300 is the clear winner of the match-up (13 : 3 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 Nikon D300 and the Canon 20D 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 remains incomplete and does no justice, for example, to the way the D300 or the 20D perform in practice. 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 where reviews by experts come in. 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.

Expert Camera Reviews

		Camera   Model	AP   score	CL   score	DCW   score	DPR   score	EPZ   score	PB   score	Camera Launch	Launch Price (USD)	Street Price
1.		Nikon D300	..	+ +	..	+ +	5/5	4.5/5	Aug 2007	1,799	ebay.com
2.		Canon 20D	..	..	..	+ +	..	..	Aug 2004	1,499	ebay.com
3.		Canon 10D	..	..	..	+ +	..	..	Feb 2003	1,999	ebay.com
4.		Canon 30D	..	+ +	..	+ +	o	..	Feb 2006	1,399	ebay.com
5.		Canon 40D	..	+ +	..	+ +	4.5/5	4.5/5	Aug 2007	1,299	ebay.com
6.		Canon Rebel	..	..	..	+ +	..	..	Aug 2003	899	ebay.com
7.		Canon XT	..	80/100	..	+ +	o	..	Feb 2005	899	ebay.com
8.		Nikon D2X	..	..	..	+ +	..	..	Sep 2004	4,999	ebay.com
9.		Nikon D2Xs	..	..	..	..	..	..	Jun 2006	4,699	ebay.com
10.		Nikon D40X	..	79/100	..	+ +	4/5	4/5	Mar 2007	729	ebay.com
11.		Nikon D60	..	80/100	..	+ +	4/5	4.5/5	Jan 2008	629	ebay.com
12.		Nikon D80	..	+	..	+ +	o	4.5/5	Aug 2006	999	ebay.com
13.		Nikon D90	..	+ +	..	+ +	4/5	4.5/5	Aug 2008	1,299	ebay.com
14.		Nikon D200	..	+ +	..	+ +	o	..	Nov 2005	1,699	ebay.com
15.		Nikon D300S	5/5	+ +	..	82/100	4/5	4.5/5	Jul 2009	1,799	ebay.com
16.		Nikon D700	..	89/100	..	+ +	4.5/5	4.5/5	Jul 2008	2,999	ebay.com
17.		Nikon D7000	4/5	..	..	80/100	4.5/5	4.5/5	Sep 2010	1,499	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. 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, 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 would like to check on the differences and similarities of other camera models, just use the search menu below. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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