Olympus E-1 vs Canon 100D

The Olympus E-1 and the Canon EOS 100D (labelled Canon SL1 in some countries) are two digital cameras that were revealed to the public, respectively, in June 2003 and March 2013. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a Four Thirds (E-1) and an APS-C (100D) sensor. The Olympus has a resolution of 4.9 megapixels, whereas the Canon provides 17.9 MP.

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

Headline Specifications

Olympus E-1		Canon 100D
Digital single lens reflex		Digital single lens reflex
Four Thirds lenses		Canon EF mount lenses
4.9 MP – Four Thirds sensor		17.9 MP – APS-C sensor
no Video		1080/30p Video
ISO 100-800 (100 - 3,200)		ISO 100-12,800 (100 - 25,600)
Optical viewfinder		Optical viewfinder
1.8" LCD – 134k dots		3.0" LCD – 1040k dots
Fixed screen (not touch-sensitive)		Fixed touchscreen
3 shutter flaps per second		4.9 shutter flaps per second
Weathersealed body		not weather sealed
750 shots per battery charge		380 shots per battery charge
141 x 104 x 81 mm, 738 g		117 x 91 x 69 mm, 407 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus E-1 and the Canon EOS 100D? 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 Olympus E-1 and the Canon 100D. 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.

The 100D can be obtained in two different colors (black, white), while the E-1 is only available in black.

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon 100D is notably smaller (27 percent) than the Olympus E-1. Moreover, the 100D is substantially lighter (45 percent) than the E-1. It is worth mentioning in this context that the E-1 is splash and dust resistant, while the 100D 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 Four Thirds Lens Catalog (E-1) and the Canon EF Lens Catalog (100D).

Concerning battery life, the E-1 gets 750 shots out of its Olympus BLM-1 battery, while the 100D can take 380 images on a single charge of its Canon LP-E12 power pack.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. 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 (USD)	Street Price
1.		Olympus E-1	141 mm	104 mm	81 mm	738 g	750	Y	Jun 2003	1,699	ebay.com
2.		Canon 100D	117 mm	91 mm	69 mm	407 g	380	n	Mar 2013	549	ebay.com
3.		Canon 6D Mark II	144 mm	111 mm	75 mm	765 g	1200	Y	Jun 2017	1,999	amazon.com
4.		Canon 7D	148 mm	111 mm	74 mm	860 g	800	Y	Sep 2009	1,699	ebay.com
5.		Canon 200D	122 mm	93 mm	70 mm	453 g	650	n	Jun 2017	549	ebay.com
6.		Canon 700D	133 mm	100 mm	79 mm	580 g	440	n	Mar 2013	649	ebay.com
7.		Canon 1200D	130 mm	100 mm	78 mm	480 g	500	n	Feb 2014	449	ebay.com
8.		Canon G16	109 mm	76 mm	40 mm	356 g	360	n	Aug 2013	549	ebay.com
9.		Leica Digilux 3	146 mm	87 mm	77 mm	606 g	750	n	Sep 2006	1,499	ebay.com
10.		Nikon D500	147 mm	115 mm	81 mm	860 g	1240	Y	Jan 2016	1,999	ebay.com
11.		Nikon D610	141 mm	113 mm	82 mm	850 g	900	Y	Oct 2013	1,999	ebay.com
12.		Nikon D7000	132 mm	105 mm	77 mm	780 g	1050	Y	Sep 2010	1,499	ebay.com
13.		Olympus E-3	142 mm	116 mm	75 mm	876 g	750	Y	Oct 2007	1,699	ebay.com
14.		Olympus E-5	142 mm	117 mm	75 mm	873 g	750	Y	Sep 2010	1,699	ebay.com
15.		Olympus E-300	147 mm	85 mm	64 mm	624 g	750	n	Sep 2004	799	ebay.com
16.		Olympus E-330	140 mm	87 mm	72 mm	637 g	750	n	Jan 2006	999	ebay.com
17.		Panasonic G6	122 mm	85 mm	71 mm	390 g	340	n	Apr 2013	599	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 100D was launched at a markedly lower price (by 68 percent) than the E-1, 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 imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Olympus E-1 features a Four Thirds sensor and the Canon 100D an APS-C sensor. The sensor area in the 100D is 48 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.6. The sensor in the E-1 has a native 4:3 aspect ratio, while the one in the 100D offers a 3:2 aspect.

With 17.9MP, the 100D offers a higher resolution than the E-1 (4.9MP), but the 100D has smaller individual pixels (pixel pitch of 4.31μm versus 6.78μm for the E-1). Yet, the 100D is a much more recent model (by 9 years and 8 months) than the E-1, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units.

The resolution advantage of the Canon 100D implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 100D 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 Olympus E-1 are 12.8 x 9.6 inches or 32.5 x 24.4 cm for good quality, 10.2 x 7.7 inches or 26 x 19.5 cm for very good quality, and 8.5 x 6.4 inches or 21.7 x 16.3 cm for excellent quality prints.

The 100D has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Olympus E-1 has a native sensitivity range from ISO 100 to ISO 800, which can be extended to ISO 100-3200. The corresponding ISO settings for the Canon EOS 100D are ISO 100 to ISO 12800, with the possibility to increase the ISO range to 100-25600.

In terms of underlying technology, the E-1 is build around a CCD sensor, while the 100D uses a CMOS 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 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 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.		Olympus E-1	Four Thirds	4.9	2560	1920	none	20.0	9.7	-145	44
2.		Canon 100D	APS-C	17.9	5184	3456	1080/30p	21.8	11.3	843	63
3.		Canon 6D Mark II	Full Frame	26.0	6240	4160	1080/60p	24.4	11.9	2862	85
4.		Canon 7D	APS-C	17.9	5184	3456	1080/30p	22.0	11.7	854	66
5.		Canon 200D	APS-C	24.0	6000	4000	1080/60p	23.6	13.4	1041	79
6.		Canon 700D	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	681	61
7.		Canon 1200D	APS-C	17.9	5184	3456	1080/30p	21.9	11.3	724	63
8.		Canon G16	1/1.7	12.0	4000	3000	1080/60p	21.0	11.7	230	54
9.		Leica Digilux 3	Four Thirds	7.4	3136	2352	none	21.0	10.6	127	53
10.		Nikon D500	APS-C	20.7	5568	3712	4K/30p	24.0	14.0	1324	83
11.		Nikon D610	Full Frame	24.2	6016	4016	1080/30p	25.1	14.4	2925	94
12.		Nikon D7000	APS-C	16.1	4928	3264	1080/24p	23.5	13.9	1167	80
13.		Olympus E-3	Four Thirds	10.0	3648	2736	none	21.6	10.5	571	56
14.		Olympus E-5	Four Thirds	12.2	4032	3024	720/30p	21.6	10.5	519	56
15.		Olympus E-300	Four Thirds	8.0	3264	2448	none	20.4	10.1	-40	48
16.		Olympus E-330	Four Thirds	7.4	3136	2352	none	20.8	10.4	73	52
17.		Panasonic G6	Four Thirds	15.9	4608	3456	1080/60p	21.3	11.5	639	61
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 also of capturing video footage. The 100D indeed provides for movie recording, while the E-1 does not. The highest resolution format that the 100D can use is 1080/30p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. The E-1 and the 100D 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 E-1 offers a wider field of view (100%) than the one in the 100D (95%), so that a larger proportion of the captured image is visible in the finder. On the other hand, the viewfinder of the 100D has a higher magnification (0.54x vs 0.48x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Olympus E-1, the Canon 100D, 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.		Olympus E-1	optical	Y	1.8 / 134	fixed	n	1/4000s	3.0/s	n	n
2.		Canon 100D	optical	n	3.0 / 1040	fixed	Y	1/4000s	4.9/s	Y	n
3.		Canon 6D Mark II	optical	Y	3.0 / 1040	swivel	Y	1/4000s	6.5/s	n	n
4.		Canon 7D	optical	Y	3.0 / 920	fixed	n	1/8000s	8.0/s	Y	n
5.		Canon 200D	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
6.		Canon 700D	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
7.		Canon 1200D	optical	n	3.0 / 460	fixed	n	1/4000s	3.0/s	Y	n
8.		Canon G16	optical	n	3.0 / 922	fixed	n	1/4000s	2.2/s	Y	Y
9.		Leica Digilux 3	optical	n	2.5 / 207	fixed	n	1/4000s	3.0/s	Y	n
10.		Nikon D500	optical	Y	3.2 / 2359	tilting	Y	1/8000s	10.0/s	n	n
11.		Nikon D610	optical	Y	3.2 / 921	fixed	n	1/4000s	6.0/s	Y	n
12.		Nikon D7000	optical	Y	3.0 / 921	fixed	n	1/8000s	6.0/s	Y	n
13.		Olympus E-3	optical	Y	2.5 / 230	swivel	n	1/8000s	5.0/s	Y	Y
14.		Olympus E-5	optical	Y	3.0 / 920	swivel	n	1/8000s	5.0/s	Y	Y
15.		Olympus E-300	optical	n	1.8 / 134	fixed	n	1/4000s	2.5/s	Y	n
16.		Olympus E-330	optical	n	2.5 / 215	tilting	n	1/4000s	3.0/s	Y	n
17.		Panasonic G6	1440	n	3.0 / 1036	swivel	Y	1/4000s	7.0/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 E-1, but is missing on the 100D 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 E-1 writes its imaging data to Compact Flash or xD Picture cards, while the 100D uses SDXC cards. The E-1 features dual card slots, which can be very useful in case a memory card fails. In contrast, the 100D 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 Olympus E-1 and Canon EOS 100D 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.		Olympus E-1	Y	- / -	-	-	-	2.0	-	-	-
2.		Canon 100D	Y	mono / mono	Y	-	mini	2.0	-	-	-
3.		Canon 6D Mark II	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
4.		Canon 7D	Y	mono / -	Y	-	mini	2.0	-	-	-
5.		Canon 200D	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
6.		Canon 700D	Y	stereo / mono	Y	-	mini	2.0	-	-	-
7.		Canon 1200D	Y	mono / mono	-	-	mini	2.0	-	-	-
8.		Canon G16	Y	stereo / mono	-	-	mini	2.0	Y	-	-
9.		Leica Digilux 3	Y	stereo / mono	-	-	-	2.0	-	-	-
10.		Nikon D500	Y	stereo / mono	Y	Y	mini	3.0	Y	Y	Y
11.		Nikon D610	Y	mono / mono	Y	Y	mini	2.0	-	-	-
12.		Nikon D7000	Y	mono / mono	Y	-	mini	2.0	-	-	-
13.		Olympus E-3	Y	- / -	-	-	-	2.0	-	-	-
14.		Olympus E-5	Y	stereo / -	-	-	mini	2.0	-	-	-
15.		Olympus E-300	Y	- / -	-	-	-	2.0	-	-	-
16.		Olympus E-330	Y	- / -	-	-	-	2.0	-	-	-
17.		Panasonic G6	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-

Studio photographers will appreciate that the Olympus E-1 (unlike the 100D) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the E-1 and the 100D have been discontinued, but can regularly be found used on ebay. The E-1 was replaced by the Olympus E-3, while the 100D was followed by the Canon 200D. Further information on the features and operation of the E-1 and 100D can be found, respectively, in the Olympus E-1 Manual (free pdf) or the online Canon 100D Manual.

Review summary

So what is the bottom line? Is there a clear favorite between the Olympus E-1 and the Canon 100D? Which camera is better? The listing below highlights the relative strengths of the two models.

Arguments in favor of the Olympus E-1:

• More complete view: Has a viewfinder with a larger field of view (100% vs 95%).
• Easier setting verification: Features an LCD display on top to control shooting parameters.
• Longer lasting: Can take more shots (750 versus 380) on a single battery charge.
• Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
• 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 June 2003).

Reasons to prefer the Canon EOS 100D:

• More detail: Has more megapixels (17.9 vs 4.9MP), which boosts linear resolution by 95%.
• Better image quality: Is equipped with a larger and more technologically advanced 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.
• Broader imaging potential: Can capture not only stills but also 1080/30p video.
• Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.54x vs 0.48x).
• 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 (1040k vs 134k dots).
• Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
• Faster burst: Shoots at higher frequency (4.9 vs 3 flaps/sec) to capture the decisive moment.
• More compact: Is smaller (117x91mm vs 141x104mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight (by 331g or 45 percent) and is thus easier to take along.
• Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
• More affordable: Was introduced into a lower priced category (68 percent cheaper at launch).
• More modern: Reflects 9 years and 8 months of technical progress since the E-1 launch.

If the count of individual advantages (bullet points above) is taken as a guide, the 100D is the clear winner of the contest (17 : 7 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.

How about other alternatives? Do the specifications of the Olympus E-1 and the Canon 100D 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 technical specifications can provide a useful overview of the capabilities of different cameras, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the E-1 or the 100D. 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 where reviews by experts come in. The table below provides a synthesis of the camera assessments of some of the best known photo-gear 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.		Olympus E-1	..	..	..	+	o	..	Jun 2003	1,699	ebay.com
2.		Canon 100D	4/5	+	..	78/100	4/5	4/5	Mar 2013	549	ebay.com
3.		Canon 6D Mark II	4/5	+	4/5	80/100	4.5/5	4/5	Jun 2017	1,999	amazon.com
4.		Canon 7D	5/5	+ +	..	84/100	4.5/5	4.5/5	Sep 2009	1,699	ebay.com
5.		Canon 200D	4/5	+ +	4/5	78/100	4.5/5	4.5/5	Jun 2017	549	ebay.com
6.		Canon 700D	..	..	..	76/100	4.5/5	4.5/5	Mar 2013	649	ebay.com
7.		Canon 1200D	3/5	+	..	..	4/5	4.5/5	Feb 2014	449	ebay.com
8.		Canon G16	4/5	+	..	..	4.5/5	4.5/5	Aug 2013	549	ebay.com
9.		Leica Digilux 3	..	..	..	..	..	..	Sep 2006	1,499	ebay.com
10.		Nikon D500	5/5	+ +	4.7/5	91/100	4.5/5	5/5	Jan 2016	1,999	ebay.com
11.		Nikon D610	4/5	+ +	..	87/100	4.5/5	4.5/5	Oct 2013	1,999	ebay.com
12.		Nikon D7000	4/5	..	..	80/100	4.5/5	4.5/5	Sep 2010	1,499	ebay.com
13.		Olympus E-3	..	88/100	..	+ +	o	4/5	Oct 2007	1,699	ebay.com
14.		Olympus E-5	4/5	..	..	75/100	4/5	4.5/5	Sep 2010	1,699	ebay.com
15.		Olympus E-300	..	..	..	+	o	4.5/5	Sep 2004	799	ebay.com
16.		Olympus E-330	..	..	..	+	o	..	Jan 2006	999	ebay.com
17.		Panasonic G6	4/5	+ +	..	..	5/5	4.5/5	Apr 2013	599	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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, 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 are interested in seeing how other cameras pair up, just make a corresponding selection in the search boxes below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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