Canon 550D vs Epson R-D1

The Canon EOS 550D (called Canon T2i in some regions) and the Epson R-D1 are two digital cameras that were officially introduced, respectively, in February 2010 and March 2004. The 550D is a DSLR, while the R-D1 is a rangefinder-focusing mirrorless camera. Both cameras are equipped with an APS-C sensor. The Canon has a resolution of 17.9 megapixels, whereas the Epson provides 6 MP.

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

Headline Specifications

Canon 550D		Epson R-D1
Digital single lens reflex		Rangefinder camera
Canon EF mount lenses		Leica M mount lenses
17.9 MP – APS-C sensor		6 MP – APS-C sensor
1080/30p Video		no Video
ISO 100-6,400 (100 - 12,800)		ISO 200-1,600
Optical viewfinder		Optical viewfinder
3.0" LCD – 1040k dots		2.0" LCD – 235k dots
Fixed screen (not touch-sensitive)		Fixed screen (not touch-sensitive)
3.7 shutter flaps per second		1 shutter flaps per second
129 x 98 x 62 mm, 530 g		142 x 89 x 40 mm, 620 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 550D and the Epson R-D1? 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 550D and the Epson R-D1 is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All size 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 550D and the Epson R-D1 are of equal size. However, the R-D1 is markedly heavier (17 percent) than the 550D. In this context, it is worth noting that neither the 550D nor the R-D1 are weather-sealed.

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. Both cameras have similarly sized sensors, but DSLRs have a larger flange-to-focal plane distance than mirrorless cameras, which imposes contraints on the optical engineering process and generally leads to bigger and heavier lenses. You can compare the optics available for the two cameras in the Canon EF Lens Catalog (550D) and the Leica M Lens Catalog (R-D1).

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, 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.		Canon 550D	129 mm	98 mm	62 mm	530 g	440	n	Feb 2010	699	ebay.com
2.		Epson R-D1	142 mm	89 mm	40 mm	620 g	..	n	Mar 2004	2,999	ebay.com
3.		Canon 4000D	129 mm	102 mm	77 mm	436 g	500	n	Feb 2018	399	amazon.com
4.		Canon 750D	132 mm	101 mm	78 mm	555 g	440	n	Feb 2015	749	ebay.com
5.		Canon 760D	132 mm	101 mm	78 mm	565 g	440	n	Feb 2015	649	ebay.com
6.		Canon 1200D	130 mm	100 mm	78 mm	480 g	500	n	Feb 2014	449	ebay.com
7.		Canon 700D	133 mm	100 mm	79 mm	580 g	440	n	Mar 2013	649	ebay.com
8.		Canon 650D	133 mm	100 mm	79 mm	575 g	440	n	Jun 2012	849	ebay.com
9.		Canon 600D	133 mm	100 mm	80 mm	570 g	440	n	Feb 2011	599	ebay.com
10.		Canon 1100D	130 mm	100 mm	78 mm	495 g	700	n	Feb 2011	449	ebay.com
11.		Canon 500D	129 mm	98 mm	62 mm	520 g	400	n	Mar 2009	799	ebay.com
12.		Canon Rebel	142 mm	99 mm	72 mm	649 g	400	n	Aug 2003	899	ebay.com
13.		Leica X Vario	133 mm	73 mm	95 mm	680 g	450	n	Jun 2013	2,850	ebay.com
14.		Nikon D5100	128 mm	97 mm	79 mm	560 g	660	n	Apr 2011	749	ebay.com
15.		Nikon D50	133 mm	102 mm	76 mm	620 g	400	n	Apr 2005	749	ebay.com
16.		Nikon D70s	140 mm	111 mm	78 mm	679 g	500	n	Apr 2005	899	ebay.com
17.		Nikon D70	140 mm	111 mm	78 mm	679 g	400	n	Jan 2004	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 naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The 550D was launched at a markedly lower price (by 77 percent) than the R-D1, 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.

Sensor comparison

The size of the imaging sensor is a crucial determinant 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the R-D1 is 11 percent bigger. As a result of these sensor size differences, the cameras have format factors, respectively, of 1.6 (550D) and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Despite having a smaller sensor, the Canon 550D offers a higher resolution of 17.9 megapixels, compared with 6 MP of the Epson R-D1. 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 7.85μm for the R-D1). However, it should be noted that the 550D is much more recent (by 5 years and 11 months) than the R-D1, 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 550D implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 550D for good quality output (200 dots per inch) amounts to 25.9 x 17.3 inches or 65.8 x 43.9 cm, for very good quality (250 dpi) 20.7 x 13.8 inches or 52.7 x 35.1 cm, and for excellent quality (300 dpi) 17.3 x 11.5 inches or 43.9 x 29.3 cm. The corresponding values for the Epson R-D1 are 15 x 10 inches or 38.2 x 25.4 cm for good quality, 12 x 8 inches or 30.6 x 20.3 cm for very good quality, and 10 x 6.7 inches or 25.5 x 16.9 cm for excellent quality prints.

The Canon EOS 550D has a native sensitivity range from ISO 100 to ISO 6400, which can be extended to ISO 100-12800. The corresponding ISO settings for the Epson R-D1 are ISO 200 to ISO 1600 (no boost).

In terms of underlying technology, the 550D is build around a CMOS sensor, while the R-D1 uses a CCD imager. 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 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 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
1.		Canon 550D	APS-C	17.9	5184	3456	1080/30p	22.1	11.5	784	66
2.		Epson R-D1	APS-C	6.0	3008	2000	none	21.1	10.4	564	55
3.		Canon 4000D	APS-C	17.9	5184	3456	1080/30p	21.9	11.4	695	63
4.		Canon 750D	APS-C	24.0	6000	4000	1080/30p	22.7	12.0	919	71
5.		Canon 760D	APS-C	24.0	6000	4000	1080/30p	22.6	12.0	915	70
6.		Canon 1200D	APS-C	17.9	5184	3456	1080/30p	21.9	11.3	724	63
7.		Canon 700D	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	681	61
8.		Canon 650D	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	722	62
9.		Canon 600D	APS-C	17.9	5184	3456	1080/30p	22.1	11.5	793	65
10.		Canon 1100D	APS-C	12.2	4272	2848	720/30p	21.9	11.0	755	62
11.		Canon 500D	APS-C	15.1	4752	3168	1080/20p	21.7	11.5	663	63
12.		Canon Rebel	APS-C	6.3	3072	2048	none	21.0	10.8	544	55
13.		Leica X Vario	APS-C	16.1	4928	3272	1080/30p	23.4	12.7	1320	78
14.		Nikon D5100	APS-C	16.1	4928	3264	1080/30p	23.5	13.6	1183	80
15.		Nikon D50	APS-C	6.0	3008	2000	none	20.9	10.8	560	55
16.		Nikon D70s	APS-C	6.0	3008	2000	none	20.4	10.3	529	50
17.		Nikon D70	APS-C	6.0	3008	2000	none	20.4	10.3	529	50
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras are not only capable of taking still images, but can also record movies. The 550D indeed provides movie recording capabilities, while the R-D1 does not. The highest resolution format that the 550D can use is 1080/30p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. The 550D and the R-D1 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 550D and Epson R-D1 along with similar information for a selection of comparators.

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 550D	optical	n	3.0 / 1040	fixed	n	1/4000s	3.7/s	Y	n
2.		Epson R-D1	optical	n	2.0 / 235	fixed	n	1/2000s	1.0/s	n	n
3.		Canon 4000D	optical	n	2.7 / 230	fixed	n	1/4000s	3.0/s	Y	n
4.		Canon 750D	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
5.		Canon 760D	optical	Y	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
6.		Canon 1200D	optical	n	3.0 / 460	fixed	n	1/4000s	3.0/s	Y	n
7.		Canon 700D	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
8.		Canon 650D	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
9.		Canon 600D	optical	n	3.0 / 1040	swivel	n	1/4000s	3.7/s	Y	n
10.		Canon 1100D	optical	n	2.7 / 230	fixed	n	1/4000s	3.0/s	Y	n
11.		Canon 500D	optical	n	3.0 / 920	fixed	n	1/4000s	3.4/s	Y	n
12.		Canon Rebel	optical	n	1.8 / 118	fixed	n	1/4000s	2.5/s	Y	n
13.		Leica X Vario	optional	n	3.0 / 920	fixed	n	1/2000s	5.0/s	Y	n
14.		Nikon D5100	optical	n	3.0 / 921	swivel	n	1/4000s	4.0/s	Y	n
15.		Nikon D50	optical	n	2.0 / 130	fixed	n	1/4000s	2.5/s	Y	n
16.		Nikon D70s	optical	n	2.0 / 130	fixed	n	1/8000s	3.0/s	Y	n
17.		Nikon D70	optical	n	1.8 / 130	fixed	n	1/8000s	3.0/s	Y	n
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 550D has one, while the R-D1 does not. While the built-in flash of the 550D is not very powerful, it can at times be useful as a fill-in light.

The 550D writes its imaging data to SDXC cards, while the R-D1 uses SDHC 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 550D and Epson R-D1 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 550D	Y	stereo / -	Y	-	mini	2.0	-	-	-
2.		Epson R-D1	Y	- / -	-	-	-	-	-	-	-
3.		Canon 4000D	Y	mono / mono	-	-	mini	2.0	Y	Y	-
4.		Canon 750D	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
5.		Canon 760D	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
6.		Canon 1200D	Y	mono / mono	-	-	mini	2.0	-	-	-
7.		Canon 700D	Y	stereo / mono	Y	-	mini	2.0	-	-	-
8.		Canon 650D	Y	stereo / mono	Y	-	mini	2.0	-	-	-
9.		Canon 600D	Y	mono / mono	Y	-	mini	2.0	-	-	-
10.		Canon 1100D	Y	stereo / mono	-	-	mini	2.0	-	-	-
11.		Canon 500D	Y	mono / mono	-	-	mini	2.0	-	-	-
12.		Canon Rebel	Y	- / -	-	-	-	1.1	-	-	-
13.		Leica X Vario	Y	stereo / mono	-	-	mini	2.0	-	-	-
14.		Nikon D5100	Y	mono / mono	Y	-	mini	2.0	-	-	-
15.		Nikon D50	Y	- / -	-	-	-	2.0	-	-	-
16.		Nikon D70s	Y	- / -	-	-	-	2.0	-	-	-
17.		Nikon D70	Y	- / -	-	-	-	1.0	-	-	-

Studio photographers will appreciate that the Epson R-D1 (unlike the 550D) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the 550D and the R-D1 have been discontinued, but can regularly be found used on ebay. The 550D was replaced by the Canon 600D, while the R-D1 does not have a direct successor. Further information on the features and operation of the 550D and R-D1 can be found, respectively, in the Canon 550D Manual (free pdf) or the online Epson R-D1 Manual.

Review summary

So what conclusions can be drawn? Is there a clear favorite between the Canon 550D and the Epson R-D1? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.

Advantages of the Canon EOS 550D:

• More detail: Offers more megapixels (17.9 vs 6MP) with a 72% higher linear resolution.
• Broader imaging potential: Can record not only still images but also 1080/30p movies.
• Larger screen: Has a bigger rear LCD (3.0" vs 2.0") for image review and settings control.
• More detailed LCD: Has a higher resolution rear screen (1040k vs 235k dots).
• Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/2000s) to freeze action.
• Faster burst: Shoots at higher frequency (3.7 vs 1 flaps/sec) to capture the decisive moment.
• Less heavy: Is lighter (by 90g or 15 percent) and hence easier to carry around.
• Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
• More affordable: Was introduced into a lower priced category (77 percent cheaper at launch).
• More modern: Reflects 5 years and 11 months of technical progress since the R-D1 launch.

Arguments in favor of the Epson R-D1:

• Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
• More heavily discounted: Has been around for much longer (launched in March 2004).

If the number of relative strengths (bullet points above) is taken as a guide, the 550D is the clear winner of the match-up (10 : 2 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 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.

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the 550D or the R-D1 perform in practice. 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 (USD)	Street Price
1.		Canon 550D	..	+ +	..	77/100	4/5	4.5/5	Feb 2010	699	ebay.com
2.		Epson R-D1	..	..	..	..	..	..	Mar 2004	2,999	ebay.com
3.		Canon 4000D	2.5/5	o	3/5	..	3.5/5	3.5/5	Feb 2018	399	amazon.com
4.		Canon 750D	5/5	..	..	75/100	4.5/5	4.5/5	Feb 2015	749	ebay.com
5.		Canon 760D	5/5	+	..	77/100	4.5/5	4.5/5	Feb 2015	649	ebay.com
6.		Canon 1200D	3/5	+	..	..	4/5	4.5/5	Feb 2014	449	ebay.com
7.		Canon 700D	..	..	..	76/100	4.5/5	4.5/5	Mar 2013	649	ebay.com
8.		Canon 650D	4/5	+ +	..	77/100	4.5/5	4.5/5	Jun 2012	849	ebay.com
9.		Canon 600D	3/5	o	..	77/100	4.5/5	4.5/5	Feb 2011	599	ebay.com
10.		Canon 1100D	..	80/100	..	69/100	4/5	4.5/5	Feb 2011	449	ebay.com
11.		Canon 500D	..	+ +	..	74/100	4.5/5	4.5/5	Mar 2009	799	ebay.com
12.		Canon Rebel	..	..	..	+ +	..	..	Aug 2003	899	ebay.com
13.		Leica X Vario	3/5	..	..	..	4/5	4/5	Jun 2013	2,850	ebay.com
14.		Nikon D5100	5/5	+ +	..	76/100	4.5/5	4.5/5	Apr 2011	749	ebay.com
15.		Nikon D50	..	78/100	..	+ +	4/5	4.5/5	Apr 2005	749	ebay.com
16.		Nikon D70s	..	..	..	..	..	5/5	Apr 2005	899	ebay.com
17.		Nikon D70	..	..	..	+ +	..	..	Jan 2004	999	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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, please note that some of the review sites have changed their methodology and reporting over time.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. 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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