Canon 20D vs Sony RX0

The Canon EOS 20D and the Sony Cyber-shot DSC-RX0 are two digital cameras that were officially introduced, respectively, in August 2004 and August 2017. The 20D is a DSLR, while the RX0 is a fixed lens compact. The cameras are based on an APS-C (20D) and an one-inch (RX0) sensor. The Canon has a resolution of 8.2 megapixels, whereas the Sony provides 15.4 MP.

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

Headline Specifications

Canon 20D		Sony RX0
Digital single lens reflex		Fixed lens compact camera
Canon EF mount lenses		24mm f/4.0
8.2 MP – APS-C sensor		15.4 MP – 1" sensor
no Video		1080/60p Video
ISO 100-1,600 (100 - 3,200)		ISO 125-12,800
Optical viewfinder		No viewfinder, LCD framing
1.8" LCD – 118k dots		1.5" LCD – 230k dots
Fixed screen (not touch-sensitive)		Fixed screen (not touch-sensitive)
5 shutter flaps per second		5.5 shutter flaps per second
not weather sealed		Waterproof body (10m)
700 shots per battery charge		240 shots per battery charge
144 x 106 x 72 mm, 770 g		59 x 41 x 30 mm, 110 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 20D and the Sony Cyber-shot DSC-RX0? 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 Canon 20D and the Sony RX0. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear 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 Sony RX0 is considerably smaller (84 percent) than the Canon 20D. It is noteworthy in this context that the RX0 is splash and dust-proof, while the 20D does not feature any corresponding weather-sealing. More than that, the RX0 is water-proof up to 10m and can, thus, be used for underwater photography.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the RX0 has a lens built in, whereas the 20D 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 20D and their specifications in the Canon EF Lens Catalog.

Concerning battery life, the 20D gets 700 shots out of its Canon BP-511A battery, while the RX0 can take 240 images on a single charge of its Sony NP-BJ1 power pack. The power pack in the RX0 can be charged via the USB port, which can be very convenient when travelling.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.

Body Specifications

		Camera Model	Camera Width	Camera Height	Camera Depth	Camera Weight	Battery Life	Weather Sealing	Camera Launch	Launch Price	Street Price
1.		Canon 20D	144 mm	106 mm	72 mm	770 g	700	n	Aug 2004	US$ 1 499	ebay.com
2.		Sony RX0	59 mm	41 mm	30 mm	110 g	240	Y	Aug 2017	US$ 699	ebay.com
3.		Canon 7D	148 mm	111 mm	74 mm	860 g	800	Y	Sep 2009	US$ 1 699	ebay.com
4.		Canon 7D II	149 mm	112 mm	78 mm	910 g	670	Y	Sep 2014	US$ 1 799	ebay.com
5.		Canon 10D	150 mm	107 mm	75 mm	850 g	500	n	Feb 2003	US$ 1 999	ebay.com
6.		Canon 30D	144 mm	106 mm	74 mm	785 g	750	n	Feb 2006	US$ 1 399	ebay.com
7.		Canon 40D	146 mm	108 mm	74 mm	822 g	750	n	Aug 2007	US$ 1 299	ebay.com
8.		Canon 50D	146 mm	108 mm	74 mm	822 g	800	Y	Aug 2008	US$ 1 299	ebay.com
9.		Canon 60D	145 mm	106 mm	79 mm	755 g	1100	Y	Aug 2010	US$ 1 399	ebay.com
10.		Canon 300D	142 mm	99 mm	72 mm	649 g	400	n	Aug 2003	US$ 899	ebay.com
11.		Canon 350D	127 mm	94 mm	64 mm	540 g	400	n	Feb 2005	US$ 899	ebay.com
12.		Fujifilm X70	113 mm	64 mm	44 mm	340 g	330	n	Jan 2016	US$ 799	ebay.com
13.		Nikon D200	147 mm	113 mm	74 mm	920 g	400	Y	Nov 2005	US$ 1 699	ebay.com
14.		Sony RX0 II	59 mm	41 mm	35 mm	132 g	240	Y	Mar 2019	US$ 699	amazon.com
15.		Sony RX10 III	133 mm	94 mm	127 mm	1051 g	420	Y	Mar 2016	US$ 1 499	ebay.com
16.		Sony RX10 IV	133 mm	94 mm	145 mm	1095 g	400	Y	Sep 2017	US$ 1 699	amazon.com
17.		Sony RX100 V	102 mm	58 mm	41 mm	299 g	220	n	Oct 2016	US$ 999	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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The RX0 was launched at a lower price than the 20D, despite having a lens built in. 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.

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. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to 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 20D features an APS-C sensor and the Sony RX0 an one-inch sensor. The sensor area in the RX0 is 66 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.6 and 2.7. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Despite having a smaller sensor, the RX0 offers a higher resolution of 15.4 megapixels, compared with 8.2 MP of the 20D. 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 2.74μm versus 6.42μm for the 20D). However, it should be noted that the RX0 is much more recent (by 13 years) than the 20D, 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 Sony RX0 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the RX0 for good quality output (200 dots per inch) amounts to 24 x 16 inches or 61 x 40.6 cm, for very good quality (250 dpi) 19.2 x 12.8 inches or 48.8 x 32.5 cm, and for excellent quality (300 dpi) 16 x 10.7 inches or 40.6 x 27.1 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 Canon EOS 20D has a native sensitivity range from ISO 100 to ISO 1600, which can be extended to ISO 100-3200. The corresponding ISO settings for the Sony Cyber-shot DSC-RX0 are ISO 125 to ISO 12800 (no boost).

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.

For many cameras, data on sensor performance has been reported by DXO Mark. 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 consideration, the RX0 has a markedly higher DXO score than the 20D (overall score 6 points higher), which will translate into better image quality. The advantage is based on 0.5 bits higher color depth, 1.4 EV in additional dynamic range, and 0.4 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.		Canon 20D	APS-C	8.2	3504	2336	none	21.9	11.0	721	62
2.		Sony RX0	1-inch	15.4	4800	3200	1080/60p	22.4	12.4	548	68
3.		Canon 7D	APS-C	17.9	5184	3456	1080/30p	22.0	11.7	854	66
4.		Canon 7D II	APS-C	20.0	5472	3648	1080/60p	22.4	11.8	1082	70
5.		Canon 10D	APS-C	6.3	3072	2048	none	21.1	10.9	571	57
6.		Canon 30D	APS-C	8.2	3504	2336	none	21.5	10.8	736	59
7.		Canon 40D	APS-C	10.1	3888	2592	none	22.1	11.3	703	64
8.		Canon 50D	APS-C	15.1	4752	3168	none	21.8	11.4	696	63
9.		Canon 60D	APS-C	17.9	5184	3456	1080/30p	22.2	11.5	813	66
10.		Canon 300D	APS-C	6.3	3072	2048	none	21.0	10.8	544	55
11.		Canon 350D	APS-C	8.0	3456	2304	none	21.8	10.8	637	60
12.		Fujifilm X70	APS-C	16.0	4896	3264	1080/60p	23.7	13.0	1608	80
13.		Nikon D200	APS-C	10.0	3872	2592	none	22.3	11.5	583	64
14.		Sony RX0 II	1-inch	15.4	4800	3200	4K/30p	22.1	12.4	555	65
15.		Sony RX10 III	1-inch	20.0	5472	3648	4K/30p	23.1	12.6	472	70
16.		Sony RX10 IV	1-inch	20.0	5472	3648	4K/30p	22.0	12.2	408	63
17.		Sony RX100 V	1-inch	20.0	5472	3648	4K/30p	22.8	12.4	586	70
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 RX0 indeed provides for movie recording, while the 20D does not. The highest resolution format that the RX0 can use is 1080/60p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the 20D has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the RX0 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 20D, the Sony RX0, and comparable 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.		Canon 20D	optical	Y	1.8 / 118	fixed	n	1/8000s	5.0/s	Y	n
2.		Sony RX0	none	n	1.5 / 230	fixed	n	..	5.5/s	n	n
3.		Canon 7D	optical	Y	3.0 / 920	fixed	n	1/8000s	8.0/s	Y	n
4.		Canon 7D II	optical	Y	3.0 / 1040	fixed	n	1/8000s	10.0/s	Y	n
5.		Canon 10D	optical	Y	1.8 / 118	fixed	n	1/4000s	3.0/s	Y	n
6.		Canon 30D	optical	Y	2.5 / 230	fixed	n	1/8000s	5.0/s	Y	n
7.		Canon 40D	optical	Y	3.0 / 230	fixed	n	1/8000s	6.5/s	Y	n
8.		Canon 50D	optical	Y	3.0 / 920	fixed	n	1/8000s	6.3/s	Y	n
9.		Canon 60D	optical	Y	3.0 / 1040	swivel	n	1/8000s	5.3/s	Y	n
10.		Canon 300D	optical	n	1.8 / 118	fixed	n	1/4000s	2.5/s	Y	n
11.		Canon 350D	optical	n	1.8 / 115	fixed	n	1/4000s	3.0/s	Y	n
12.		Fujifilm X70	optional	n	3.0 / 1040	tilting	Y	1/4000s	8.0/s	Y	n
13.		Nikon D200	optical	Y	2.5 / 230	fixed	n	1/8000s	5.0/s	Y	n
14.		Sony RX0 II	none	n	1.5 / 230	tilting	n	..	5.5/s	n	n
15.		Sony RX10 III	2359	Y	3.0 / 1229	tilting	n	1/2000s	14.0/s	Y	Y
16.		Sony RX10 IV	2359	Y	3.0 / 1440	tilting	Y	1/2000s	24.0/s	Y	Y
17.		Sony RX100 V	2359	n	3.0 / 1229	tilting	n	1/2000s	24.0/s	Y	Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One difference between the cameras concerns the presence of an on-board flash. The 20D has one, while the RX0 does not. While the built-in flash of the 20D is not very powerful, it can at times be useful as a fill-in light.

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 RX0 only has 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 20D writes its imaging data to Compact Flash cards, while the RX0 uses micro SDXC or Memory Stick Micro 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 20D and Sony Cyber-shot DSC-RX0 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.		Canon 20D	Y	- / -	-	-	-	1.1	-	-	-
2.		Sony RX0	-	stereo / mono	Y	-	micro	2.0	Y	-	Y
3.		Canon 7D	Y	mono / -	Y	-	mini	2.0	-	-	-
4.		Canon 7D II	Y	stereo / mono	Y	Y	mini	3.0	-	-	-
5.		Canon 10D	Y	- / -	-	-	-	1.1	-	-	-
6.		Canon 30D	Y	- / -	-	-	-	2.0	-	-	-
7.		Canon 40D	Y	- / -	-	-	-	2.0	-	-	-
8.		Canon 50D	Y	- / -	-	-	mini	2.0	-	-	-
9.		Canon 60D	Y	mono / mono	Y	-	mini	2.0	-	-	-
10.		Canon 300D	Y	- / -	-	-	-	1.1	-	-	-
11.		Canon 350D	Y	- / -	-	-	-	2.0	-	-	-
12.		Fujifilm X70	Y	stereo / mono	Y	-	micro	2.0	Y	-	-
13.		Nikon D200	Y	- / -	-	-	-	2.0	-	-	-
14.		Sony RX0 II	-	stereo / mono	Y	-	micro	2.0	Y	-	Y
15.		Sony RX10 III	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-
16.		Sony RX10 IV	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-
17.		Sony RX100 V	-	stereo / mono	-	-	micro	2.0	Y	Y	-

It is notable that the 20D has a hotshoe, while the RX0 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 20D (unlike the RX0) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the 20D and the RX0 have been discontinued, but can regularly be found used on ebay. The 20D was replaced by the Canon 30D, while the RX0 was followed by the Sony RX0 II. Further information on the features and operation of the 20D and RX0 can be found, respectively, in the Canon 20D Manual (free pdf) or the online Sony RX0 Manual.

Review summary

So how do things add up? Which of the two cameras – the Canon 20D or the Sony RX0 – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.

Reasons to prefer the Canon EOS 20D:

• Better low-light sensitivity: Requires less light for good images (0.4 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.
• Larger screen: Has a bigger rear LCD (1.8" vs 1.5") for image review and settings control.
• More flexible: Can take a variety of interchangeable lenses, including specialty optics.
• Longer lasting: Can take more shots (700 versus 240) on a single battery charge.
• Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
• 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.
• More heavily discounted: Has been available for much longer (launched in August 2004).

Arguments in favor of the Sony Cyber-shot DSC-RX0:

• More detail: Has more megapixels (15.4 vs 8.2MP), which boosts linear resolution by 37%.
• Better image quality: Scores markedly higher (6 points) in the DXO overall evaluation.
• More dynamic range: Captures a broader range of light and dark details (1.4 EV of extra DR).
• Broader imaging potential: Can capture not only stills but also 1080/60p video.
• More detailed LCD: Has a higher resolution rear screen (230k vs 118k dots).
• Less disturbing: Has an electronic shutter option for completely silent shooting.
• Ready to shoot: Comes with an integrated lens, while the 20D requires a separate lens.
• More compact: Is smaller (59x41mm vs 144x106mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight even though it has a lens built in (unlike the 20D).
• Easier travel charging: Can be conveniently charged via its USB port.
• Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
• Water-proof: Is rugged and sealed and can thus be used for underwater photography (up to 10m).
• Faster data transfer: Supports a more advanced USB protocol (2.0 vs 1.1).
• Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
• Easier wireless transfer: Supports Bluetooth for image sharing without cables.
• More affordable: Was introduced at a lower price, despite coming with a built-in lens.
• More modern: Reflects 13 years of technical progress since the 20D launch.

If the count of relative strengths (bullet points above) is taken as a measure, the RX0 is the clear winner of the contest (17 : 10 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.

How about other alternatives? Do the specifications of the Canon 20D and the Sony RX0 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Prime Lens Compact Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it says little about, for example, the shooting experience and imaging performance of the 20D and the RX0 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 (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	Street Price
1.		Canon 20D	..	..	..	+ +	..	..	Aug 2004	US$ 1 499	ebay.com
2.		Sony RX0	..	..	..	..	3.5/5	4/5	Aug 2017	US$ 699	ebay.com
3.		Canon 7D	5/5	+ +	..	84/100	4.5/5	4.5/5	Sep 2009	US$ 1 699	ebay.com
4.		Canon 7D II	4.5/5	+	3.5/5	84/100	4/5	4.5/5	Sep 2014	US$ 1 799	ebay.com
5.		Canon 10D	..	..	..	+ +	..	..	Feb 2003	US$ 1 999	ebay.com
6.		Canon 30D	..	+ +	..	+ +	o	..	Feb 2006	US$ 1 399	ebay.com
7.		Canon 40D	..	+ +	..	+ +	4.5/5	4.5/5	Aug 2007	US$ 1 299	ebay.com
8.		Canon 50D	..	+ +	..	+ +	4.5/5	4.5/5	Aug 2008	US$ 1 299	ebay.com
9.		Canon 60D	5/5	+	..	79/100	4/5	4.5/5	Aug 2010	US$ 1 399	ebay.com
10.		Canon 300D	..	..	..	+ +	..	..	Aug 2003	US$ 899	ebay.com
11.		Canon 350D	..	80/100	..	+ +	o	..	Feb 2005	US$ 899	ebay.com
12.		Fujifilm X70	4.5/5	..	..	76/100	4.5/5	4.5/5	Jan 2016	US$ 799	ebay.com
13.		Nikon D200	..	+ +	..	+ +	o	..	Nov 2005	US$ 1 699	ebay.com
14.		Sony RX0 II	..	..	..	..	3.5/5	4/5	Mar 2019	US$ 699	amazon.com
15.		Sony RX10 III	5/5	+	..	84/100	4.5/5	4.5/5	Mar 2016	US$ 1 499	ebay.com
16.		Sony RX10 IV	5/5	+	3.5/5	84/100	4.5/5	5/5	Sep 2017	US$ 1 699	amazon.com
17.		Sony RX100 V	4.5/5	+ +	..	83/100	4/5	4.5/5	Oct 2016	US$ 999	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated 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 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.

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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. 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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