Canon 1D Mark III vs Epson R-D1

The Canon EOS-1D Mark III and the Epson R-D1 are two digital cameras that were revealed to the public, respectively, in February 2007 and March 2004. The 1D Mark III is a DSLR, while the R-D1 is a rangefinder-focusing mirrorless camera. The cameras are based on an APS-H (1D Mark III) and an APS-C (R-D1) sensor. The Canon has a resolution of 10.1 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 1D Mark III		Epson R-D1
Digital single lens reflex		Rangefinder camera
Canon EF mount lenses		Leica M mount lenses
10.1 MP – APS-H sensor		6 MP – APS-C sensor
no Video		no Video
ISO 100-3,200 (50 - 6,400)		ISO 200-1,600
Optical viewfinder		Optical viewfinder
3.0" LCD – 230k dots		2.0" LCD – 235k dots
Fixed screen (not touch-sensitive)		Fixed screen (not touch-sensitive)
10 shutter flaps per second		1 shutter flaps per second
Weathersealed body		not weather sealed
156 x 157 x 80 mm, 1155 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-1D Mark III 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 1D Mark III 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 consecutive perspectives from the front, the top, and the back are available. 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 Epson R-D1 is considerably smaller (48 percent) than the Canon 1D Mark III. Moreover, the R-D1 is substantially lighter (46 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 R-D1 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 will tend to go along with bigger and heavier lenses, although exceptions exist. You can compare the optics available for the two cameras in the Canon EF Lens Catalog (1D Mark III) and the Leica M Lens Catalog (R-D1).

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 adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. 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 1D Mark III	156 mm	157 mm	80 mm	1155 g	2200	Y	Feb 2007	4,499	ebay.com
2.		Epson R-D1	142 mm	89 mm	40 mm	620 g	..	n	Mar 2004	2,999	ebay.com
3.		Canon 1D Mark II	156 mm	158 mm	80 mm	1535 g	1200	Y	Jan 2004	4,499	ebay.com
4.		Canon 1D Mark II N	156 mm	158 mm	80 mm	1565 g	1200	Y	Aug 2005	3,999	ebay.com
5.		Canon 1D Mark IV	156 mm	157 mm	80 mm	1230 g	1500	Y	Oct 2009	4,999	ebay.com
6.		Canon 1Ds	156 mm	158 mm	80 mm	1265 g	600	Y	Sep 2002	8,999	ebay.com
7.		Canon 1Ds Mark III	150 mm	160 mm	80 mm	1385 g	1800	Y	Aug 2007	7,999	ebay.com
8.		Canon 5D Mark II	152 mm	114 mm	75 mm	850 g	850	Y	Sep 2008	3,499	ebay.com
9.		Canon 5D Mark III	152 mm	116 mm	76 mm	950 g	950	Y	Mar 2012	3,499	ebay.com
10.		Canon 5DS R	152 mm	116 mm	76 mm	930 g	700	Y	Feb 2015	3,699	ebay.com
11.		Canon Rebel	142 mm	99 mm	72 mm	649 g	400	n	Aug 2003	899	ebay.com
12.		Leica X Vario	133 mm	73 mm	95 mm	680 g	450	n	Jun 2013	2,850	ebay.com
13.		Nikon D2Xs	158 mm	150 mm	86 mm	1252 g	3800	Y	Jun 2006	4,699	ebay.com
14.		Nikon D3	160 mm	157 mm	88 mm	1300 g	4300	Y	Aug 2007	4,999	ebay.com
15.		Nikon D50	133 mm	102 mm	76 mm	620 g	400	n	Apr 2005	749	ebay.com
16.		Nikon D70	140 mm	111 mm	78 mm	679 g	400	n	Jan 2004	999	ebay.com
17.		Nikon D70s	140 mm	111 mm	78 mm	679 g	500	n	Apr 2005	899	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 manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The R-D1 was launched at a markedly lower price (by 33 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 size of the sensor inside a digital camera is one of the key determinants 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. 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 Epson R-D1 an APS-C sensor. The sensor area in the R-D1 is 30 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.3 and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

With 10.1MP, the 1D Mark III offers a higher resolution than the R-D1 (6MP), but the 1D Mark III has smaller individual pixels (pixel pitch of 7.21μm versus 7.85μm for the R-D1). However, the 1D Mark III is a much more recent model (by 2 years and 11 months) than the R-D1, 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 Canon 1D Mark III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 1D Mark III for good quality output (200 dots per inch) amounts to 19.4 x 13 inches or 49.4 x 32.9 cm, for very good quality (250 dpi) 15.6 x 10.4 inches or 39.5 x 26.3 cm, and for excellent quality (300 dpi) 13 x 8.6 inches or 32.9 x 21.9 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-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 Epson R-D1 are ISO 200 to ISO 1600 (no boost).

In terms of underlying technology, the 1D Mark III 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.

For many cameras, data on sensor performance has been reported by DXO Mark. 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. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-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 1D Mark III	APS-H	10.1	3888	2592	none	22.7	11.7	1078	71
2.		Epson R-D1	APS-C	6.0	3008	2000	none	21.1	10.4	564	55
3.		Canon 1D Mark II	APS-H	8.2	3504	2336	none	22.3	11.1	1003	66
4.		Canon 1D Mark II N	APS-H	8.2	3504	2336	none	22.3	11.2	975	66
5.		Canon 1D Mark IV	APS-H	16.0	4896	3264	1080/30p	22.8	12.0	1320	74
6.		Canon 1Ds	Full Frame	11.0	4064	2704	none	21.8	11.0	954	63
7.		Canon 1Ds Mark III	Full Frame	21.0	5616	3744	none	24.0	12.0	1663	80
8.		Canon 5D Mark II	Full Frame	21.0	5616	3744	1080/30p	23.7	11.9	1815	79
9.		Canon 5D Mark III	Full Frame	22.1	5760	3840	1080/30p	24.0	11.7	2293	81
10.		Canon 5DS R	Full Frame	50.3	8688	5792	1080/30p	24.6	12.4	2308	86
11.		Canon Rebel	APS-C	6.3	3072	2048	none	21.0	10.8	544	55
12.		Leica X Vario	APS-C	16.1	4928	3272	1080/30p	23.4	12.7	1320	78
13.		Nikon D2Xs	APS-C	12.2	4288	2848	none	22.2	10.9	489	59
14.		Nikon D3	Full Frame	12.1	4256	2832	none	23.5	12.2	2290	81
15.		Nikon D50	APS-C	6.0	3008	2000	none	20.9	10.8	560	55
16.		Nikon D70	APS-C	6.0	3008	2000	none	20.4	10.3	529	50
17.		Nikon D70s	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.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. The 1D Mark III 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 1D Mark III 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 1D Mark III	optical	Y	3.0 / 230	fixed	n	1/8000s	10.0/s	n	n
2.		Epson R-D1	optical	n	2.0 / 235	fixed	n	1/2000s	1.0/s	n	n
3.		Canon 1D Mark II	optical	Y	2.0 / 230	fixed	n	1/8000s	8.3/s	n	n
4.		Canon 1D Mark II N	optical	Y	2.5 / 230	fixed	n	1/8000s	8.5/s	n	n
5.		Canon 1D Mark IV	optical	Y	3.0 / 920	fixed	n	1/8000s	10.0/s	n	n
6.		Canon 1Ds	optical	Y	2.0 / 120	fixed	n	1/8000s	3.0/s	n	n
7.		Canon 1Ds Mark III	optical	Y	3.0 / 230	fixed	n	1/8000s	5.0/s	n	n
8.		Canon 5D Mark II	optical	Y	3.0 / 920	fixed	n	1/8000s	3.9/s	n	n
9.		Canon 5D Mark III	optical	Y	3.2 / 1040	fixed	n	1/8000s	6.0/s	n	n
10.		Canon 5DS R	optical	Y	3.2 / 1040	fixed	n	1/8000s	5.0/s	n	n
11.		Canon Rebel	optical	n	1.8 / 118	fixed	n	1/4000s	2.5/s	Y	n
12.		Leica X Vario	optional	n	3.0 / 920	fixed	n	1/2000s	5.0/s	Y	n
13.		Nikon D2Xs	optical	Y	2.5 / 230	fixed	n	1/8000s	5.0/s	n	n
14.		Nikon D3	optical	Y	3.0 / 922	fixed	n	1/8000s	11.0/s	n	n
15.		Nikon D50	optical	n	2.0 / 130	fixed	n	1/4000s	2.5/s	Y	n
16.		Nikon D70	optical	n	1.8 / 130	fixed	n	1/8000s	3.0/s	Y	n
17.		Nikon D70s	optical	n	2.0 / 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 feature that is present on the 1D Mark III, but is missing on the R-D1 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 R-D1 uses SDHC cards. The 1D Mark III features dual card slots, which can be very useful in case a memory card fails. In contrast, the R-D1 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 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 1D Mark III	Y	- / -	-	-	-	2.0	-	-	-
2.		Epson R-D1	Y	- / -	-	-	-	-	-	-	-
3.		Canon 1D Mark II	Y	- / -	-	-	-	1.1	-	-	-
4.		Canon 1D Mark II N	Y	- / -	-	-	-	1.1	-	-	-
5.		Canon 1D Mark IV	Y	stereo / -	Y	-	mini	2.0	-	-	-
6.		Canon 1Ds	Y	- / -	-	-	-	FW	-	-	-
7.		Canon 1Ds Mark III	Y	mono / -	-	-	-	2.0	-	-	-
8.		Canon 5D Mark II	Y	mono / mono	Y	-	mini	2.0	-	-	-
9.		Canon 5D Mark III	Y	mono / mono	Y	Y	mini	2.0	-	-	-
10.		Canon 5DS R	Y	mono / mono	Y	-	mini	3.0	-	-	-
11.		Canon Rebel	Y	- / -	-	-	-	1.1	-	-	-
12.		Leica X Vario	Y	stereo / mono	-	-	mini	2.0	-	-	-
13.		Nikon D2Xs	Y	- / -	-	-	-	2.0	-	-	-
14.		Nikon D3	Y	- / -	-	-	mini	2.0	-	-	-
15.		Nikon D50	Y	- / -	-	-	-	2.0	-	-	-
16.		Nikon D70	Y	- / -	-	-	-	1.0	-	-	-
17.		Nikon D70s	Y	- / -	-	-	-	2.0	-	-	-

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

Both the 1D Mark III and the R-D1 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 R-D1 does not have a direct successor. Further information on the features and operation of the 1D Mark III and R-D1 can be found, respectively, in the Canon 1D Mark III Manual (free pdf) or the online Epson R-D1 Manual.

Review summary

So how do things add up? Which of the two cameras – the Canon 1D Mark III or the Epson R-D1 – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.

Advantages of the Canon EOS-1D Mark III:

• More detail: Offers more megapixels (10.1 vs 6MP) with a 29% higher linear resolution.
• Better image quality: Features a larger and more technologically advanced imaging sensor.
• Richer colors: The sensor size advantage translates into images with better, more accurate colors.
• More dynamic range: Larger sensor captures a wider spectrum of light and dark details.
• Better low-light sensitivity: Larger sensor produces good images even in poorly lit environments.
• Easier setting verification: Features an LCD display on top to control shooting parameters.
• Larger screen: Has a bigger rear LCD (3.0" vs 2.0") for image review and settings control.
• Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/2000s) to freeze action.
• Faster burst: Shoots at higher frequency (10 vs 1 flaps/sec) to capture the decisive moment.
• More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
• Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
• Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
• More modern: Reflects 2 years and 11 months of technical progress since the R-D1 launch.

Arguments in favor of the Epson R-D1:

• More compact: Is smaller (142x89mm vs 156x157mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight (by 535g or 46 percent) and is thus easier to take along.
• More affordable: Was introduced into a lower priced category (33 percent cheaper at launch).
• More heavily discounted: Has been around for much longer (launched in March 2004).

If the count of relative strengths (bullet points above) is taken as a measure, the 1D Mark III is the clear winner of the match-up (13 : 4 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision 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 1D Mark III or the R-D1 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 why expert reviews are important. 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 1D Mark III	..	..	..	..	..	..	Feb 2007	4,499	ebay.com
2.		Epson R-D1	..	..	..	..	..	..	Mar 2004	2,999	ebay.com
3.		Canon 1D Mark II	..	..	..	+ +	..	..	Jan 2004	4,499	ebay.com
4.		Canon 1D Mark II N	..	..	..	..	..	..	Aug 2005	3,999	ebay.com
5.		Canon 1D Mark IV	5/5	..	..	89/100	..	..	Oct 2009	4,999	ebay.com
6.		Canon 1Ds	..	..	..	+ +	..	..	Sep 2002	8,999	ebay.com
7.		Canon 1Ds Mark III	..	..	..	+ +	4.5/5	..	Aug 2007	7,999	ebay.com
8.		Canon 5D Mark II	4/5	91/100	..	79/100	4/5	..	Sep 2008	3,499	ebay.com
9.		Canon 5D Mark III	..	+ +	..	82/100	4.5/5	4.5/5	Mar 2012	3,499	ebay.com
10.		Canon 5DS R	5/5	+	..	83/100	5/5	4.5/5	Feb 2015	3,699	ebay.com
11.		Canon Rebel	..	..	..	+ +	..	..	Aug 2003	899	ebay.com
12.		Leica X Vario	3/5	..	..	..	4/5	4/5	Jun 2013	2,850	ebay.com
13.		Nikon D2Xs	..	..	..	..	..	..	Jun 2006	4,699	ebay.com
14.		Nikon D3	..	..	..	+ +	5/5	4.5/5	Aug 2007	4,999	ebay.com
15.		Nikon D50	..	78/100	..	+ +	4/5	4.5/5	Apr 2005	749	ebay.com
16.		Nikon D70	..	..	..	+ +	..	..	Jan 2004	999	ebay.com
17.		Nikon D70s	..	..	..	..	..	5/5	Apr 2005	899	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. Hence, a score should always be seen in the context of the camera's market launch date and its price, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

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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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