Canon 300D vs Olympus E-400

The Canon EOS 300D (called Canon Rebel in some regions) and the Olympus E-400 are two digital cameras that were revealed to the public, respectively, in August 2003 and September 2006. Both are DSLR (Digital Single Lens Reflex) cameras that are based on an APS-C (300D) and a Four Thirds (E-400) sensor. The Canon has a resolution of 6.3 megapixels, whereas the Olympus provides 10 MP.

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

Headline Specifications

Canon 300D		Olympus E-400
Digital single lens reflex		Digital single lens reflex
Canon EF mount lenses		Four Thirds lenses
6.3 MP – APS-C sensor		10 MP – Four Thirds sensor
no Video		no Video
ISO 100-1,600		ISO 100-1,600
Optical viewfinder		Optical viewfinder
1.8" LCD – 118k dots		2.5" LCD – 215k dots
Fixed screen (not touch-sensitive)		Fixed screen (not touch-sensitive)
2.5 shutter flaps per second		3 shutter flaps per second
400 shots per battery charge		500 shots per battery charge
142 x 99 x 72 mm, 649 g		130 x 91 x 53 mm, 435 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 300D and the Olympus E-400? 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 physical size and weight of the Canon 300D and the Olympus E-400 are illustrated 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 width, height and depth 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 Olympus E-400 is notably smaller (16 percent) than the Canon 300D. Moreover, the E-400 is markedly lighter (33 percent) than the 300D. In this context, it is worth noting that neither the 300D nor the E-400 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. 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 (300D) and the Four Thirds Lens Catalog (E-400).

Concerning battery life, the 300D gets 400 shots out of its Canon BP-511 battery, while the E-400 can take 500 images on a single charge of its Olympus BLS-1 power pack.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

Body Specifications

		Camera Model	Camera Width	Camera Height	Camera Depth	Camera Weight	Battery Life	Weather Sealing	Camera Launch	Launch Price	Street Price
1.		Canon 300D	142 mm	99 mm	72 mm	649 g	400	n	Aug 2003	EUR 1 095	ebay.com
2.		Olympus E-400	130 mm	91 mm	53 mm	435 g	500	n	Sep 2006	EUR 699	ebay.com
3.		Canon 10D	150 mm	107 mm	75 mm	850 g	500	n	Feb 2003	EUR 1 999	ebay.com
4.		Canon 20D	144 mm	106 mm	72 mm	770 g	700	n	Aug 2004	EUR 1 599	ebay.com
5.		Canon 77D	131 mm	100 mm	76 mm	540 g	600	n	Feb 2017	EUR 899	ebay.com
6.		Canon 350D	127 mm	94 mm	64 mm	540 g	400	n	Feb 2005	EUR 899	ebay.com
7.		Canon 400D	127 mm	84 mm	65 mm	556 g	370	n	Aug 2006	EUR 799	ebay.com
8.		Canon 650D	133 mm	100 mm	79 mm	575 g	440	n	Jun 2012	EUR 799	ebay.com
9.		Canon 700D	133 mm	100 mm	79 mm	580 g	440	n	Mar 2013	EUR 599	ebay.com
10.		Canon G1 X	117 mm	81 mm	65 mm	534 g	250	n	Jan 2012	EUR 749	ebay.com
11.		Canon G1 X Mark II	116 mm	74 mm	66 mm	553 g	240	n	Feb 2014	EUR 849	ebay.com
12.		Nikon D70	140 mm	111 mm	78 mm	679 g	400	n	Jan 2004	EUR 999	ebay.com
13.		Olympus E-410	130 mm	91 mm	53 mm	435 g	500	n	Mar 2007	EUR 699	ebay.com
14.		Olympus E-420	130 mm	91 mm	53 mm	440 g	500	n	Mar 2008	EUR 499	ebay.com
15.		Olympus E-500	130 mm	95 mm	66 mm	479 g	750	n	Sep 2005	EUR 599	ebay.com
16.		Olympus E-510	136 mm	92 mm	68 mm	538 g	750	n	Mar 2007	EUR 799	ebay.com
17.		Panasonic L10	135 mm	96 mm	78 mm	556 g	450	n	Aug 2007	EUR 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 retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The E-400 was launched at a somewhat lower price (by 22 percent) than the 300D, 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.

Sensor comparison

The size of the imaging sensor is a crucial determinant 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 more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Canon 300D features an APS-C sensor and the Olympus E-400 a Four Thirds sensor. The sensor area in the E-400 is 34 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.6 and 2.0. The sensor in the 300D has a native 3:2 aspect ratio, while the one in the E-400 offers a 4:3 aspect.

Despite having a smaller sensor, the E-400 offers a higher resolution of 10 megapixels, compared with 6.3 MP of the 300D. 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 4.74μm versus 7.38μm for the 300D). However, it should be noted that the E-400 is much more recent (by 3 years) than the 300D, 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 Olympus E-400 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the E-400 for good quality output (200 dots per inch) amounts to 18.2 x 13.7 inches or 46.3 x 34.7 cm, for very good quality (250 dpi) 14.6 x 10.9 inches or 37.1 x 27.8 cm, and for excellent quality (300 dpi) 12.2 x 9.1 inches or 30.9 x 23.2 cm. The corresponding values for the Canon 300D are 15.4 x 10.2 inches or 39 x 26 cm for good quality, 12.3 x 8.2 inches or 31.2 x 20.8 cm for very good quality, and 10.2 x 6.8 inches or 26 x 17.3 cm for excellent quality prints.

The Canon EOS 300D has a native sensitivity range from ISO 100 to ISO 1600. The Olympus E-400 offers exactly the same ISO settings.

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 is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). 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 300D	APS-C	6.3	3072	2048	none	21.0	10.8	544	55
2.		Olympus E-400	Four Thirds	10.0	3648	2736	none	21.0	10.6	127	53
3.		Canon 10D	APS-C	6.3	3072	2048	none	21.1	10.9	571	57
4.		Canon 20D	APS-C	8.2	3504	2336	none	21.9	11.0	721	62
5.		Canon 77D	APS-C	24.0	6000	4000	1080/60p	23.6	13.3	971	78
6.		Canon 350D	APS-C	8.0	3456	2304	none	21.8	10.8	637	60
7.		Canon 400D	APS-C	10.1	3888	2592	none	22.1	11.0	664	62
8.		Canon 650D	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	722	62
9.		Canon 700D	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	681	61
10.		Canon G1 X	1.5-inch	14.2	4352	3264	1080/24p	21.7	10.8	644	60
11.		Canon G1 X Mark II	1.5-inch	13.0	4160	3120	1080/30p	21.5	10.8	581	58
12.		Nikon D70	APS-C	6.0	3008	2000	none	20.4	10.3	529	50
13.		Olympus E-410	Four Thirds	10.0	3648	2736	none	21.1	10.0	494	51
14.		Olympus E-420	Four Thirds	10.0	3648	2736	none	21.5	10.4	527	56
15.		Olympus E-500	Four Thirds	8.0	3264	2448	none	20.7	10.3	45	51
16.		Olympus E-510	Four Thirds	10.0	3648	2736	none	21.2	10.0	442	52
17.		Panasonic L10	Four Thirds	10.0	3648	2736	none	21.3	10.8	429	55
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 variety of features. The 300D and the E-400 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 viewfinders of both cameras offer the same field of view (95%), but the viewfinder of the 300D has a higher magnification than the one of the E-400 (0.55x vs 0.46x), 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 Canon 300D, the Olympus E-400, 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 300D	optical	n	1.8 / 118	fixed	n	1/4000s	2.5/s	Y	n
2.		Olympus E-400	optical	n	2.5 / 215	fixed	n	1/4000s	3.0/s	Y	n
3.		Canon 10D	optical	Y	1.8 / 118	fixed	n	1/4000s	3.0/s	Y	n
4.		Canon 20D	optical	Y	1.8 / 118	fixed	n	1/8000s	5.0/s	Y	n
5.		Canon 77D	optical	Y	3.0 / 1040	swivel	Y	1/4000s	6.0/s	Y	n
6.		Canon 350D	optical	n	1.8 / 115	fixed	n	1/4000s	3.0/s	Y	n
7.		Canon 400D	optical	n	2.5 / 230	fixed	n	1/4000s	3.0/s	Y	n
8.		Canon 650D	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
9.		Canon 700D	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
10.		Canon G1 X	optical	n	3.0 / 922	swivel	n	1/4000s	1.9/s	Y	Y
11.		Canon G1 X Mark II	optional	n	3.0 / 1040	tilting	Y	1/4000s	5.2/s	Y	Y
12.		Nikon D70	optical	n	1.8 / 130	fixed	n	1/8000s	3.0/s	Y	n
13.		Olympus E-410	optical	n	2.5 / 215	fixed	n	1/4000s	3.0/s	Y	n
14.		Olympus E-420	optical	n	2.7 / 215	fixed	n	1/4000s	3.5/s	Y	n
15.		Olympus E-500	optical	n	2.5 / 215	fixed	n	1/4000s	2.5/s	Y	n
16.		Olympus E-510	optical	n	2.5 / 215	fixed	n	1/4000s	3.0/s	Y	Y
17.		Panasonic L10	optical	n	2.5 / 207	swivel	n	1/4000s	3.0/s	Y	n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

The 300D writes its imaging data to Compact Flash cards, while the E-400 uses Compact Flash or xD Picture cards. The E-400 features dual card slots, which can be very useful in case a memory card fails. In contrast, the 300D 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 300D and Olympus E-400 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 300D	Y	- / -	-	-	-	1.1	-	-	-
2.		Olympus E-400	Y	- / -	-	-	-	2.0	-	-	-
3.		Canon 10D	Y	- / -	-	-	-	1.1	-	-	-
4.		Canon 20D	Y	- / -	-	-	-	1.1	-	-	-
5.		Canon 77D	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
6.		Canon 350D	Y	- / -	-	-	-	2.0	-	-	-
7.		Canon 400D	Y	- / -	-	-	-	2.0	-	-	-
8.		Canon 650D	Y	stereo / mono	Y	-	mini	2.0	-	-	-
9.		Canon 700D	Y	stereo / mono	Y	-	mini	2.0	-	-	-
10.		Canon G1 X	Y	stereo / mono	-	-	mini	2.0	-	-	-
11.		Canon G1 X Mark II	Y	stereo / mono	-	-	mini	2.0	Y	Y	-
12.		Nikon D70	Y	- / -	-	-	-	1.0	-	-	-
13.		Olympus E-410	Y	- / -	-	-	-	2.0	-	-	-
14.		Olympus E-420	Y	- / -	-	-	-	2.0	-	-	-
15.		Olympus E-500	Y	- / -	-	-	-	2.0	-	-	-
16.		Olympus E-510	Y	- / -	-	-	-	2.0	-	-	-
17.		Panasonic L10	Y	- / -	-	-	-	2.0	-	-	-

Both the 300D and the E-400 have been discontinued, but can regularly be found used on ebay. The 300D was replaced by the Canon 350D, while the E-400 was followed by the Olympus E-410. Further information on the features and operation of the 300D and E-400 can be found, respectively, in the Canon 300D Manual (free pdf) or the online Olympus E-400 Manual.

Review summary

So what conclusions can be drawn? Is there a clear favorite between the Canon 300D and the Olympus E-400? Which camera is better? The listing below highlights the relative strengths of the two models.

Reasons to prefer the Canon EOS 300D:

• Better image quality: Features bigger pixels on a larger sensor for higher quality imaging.
• Richer colors: The pixel size advantage translates into images with better, more accurate colors.
• More dynamic range: Larger pixels capture a wider spectrum of light and dark details.
• Better low-light sensitivity: Larger pixels means good image quality even under poor lighting.
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.55x vs 0.46x).
• More heavily discounted: Has been available for much longer (launched in August 2003).

Arguments in favor of the Olympus E-400:

• More detail: Has more megapixels (10 vs 6.3MP), which boosts linear resolution by 24%.
• Larger screen: Has a bigger rear LCD (2.5" vs 1.8") for image review and settings control.
• More detailed LCD: Has a higher resolution rear screen (215k vs 118k dots).
• Faster burst: Shoots at higher frequency (3 vs 2.5 flaps/sec) to capture the decisive moment.
• More compact: Is smaller (130x91mm vs 142x99mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight (by 214g or 33 percent) and is thus easier to take along.
• Longer lasting: Gets more shots (500 versus 400) out of a single battery charge.
• Faster data transfer: Supports a more advanced USB protocol (2.0 vs 1.1).
• Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
• More affordable: Was released into a lower priced segment (22 percent cheaper at launch).
• More modern: Reflects 3 years of technical progress since the 300D launch.

If the count of individual advantages (bullet points above) is taken as a guide, the E-400 is the clear winner of the contest (11 : 6 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 Canon 300D and the Olympus E-400 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 partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the 300D or the E-400. 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 hands-on reviews by experts 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	Street Price
1.		Canon 300D	..	..	..	+ +	..	..	Aug 2003	EUR 1 095	ebay.com
2.		Olympus E-400	..	85/100	..	..	4/5	4/5	Sep 2006	EUR 699	ebay.com
3.		Canon 10D	..	..	..	+ +	..	..	Feb 2003	EUR 1 999	ebay.com
4.		Canon 20D	..	..	..	+ +	..	..	Aug 2004	EUR 1 599	ebay.com
5.		Canon 77D	4.5/5	..	4/5	82/100	4.5/5	4/5	Feb 2017	EUR 899	ebay.com
6.		Canon 350D	..	80/100	..	+ +	o	..	Feb 2005	EUR 899	ebay.com
7.		Canon 400D	..	+ +	..	+ +	o	4/5	Aug 2006	EUR 799	ebay.com
8.		Canon 650D	4/5	+ +	..	77/100	4.5/5	4.5/5	Jun 2012	EUR 799	ebay.com
9.		Canon 700D	..	..	..	76/100	4.5/5	4.5/5	Mar 2013	EUR 599	ebay.com
10.		Canon G1 X	5/5	+	..	76/100	4/5	4.5/5	Jan 2012	EUR 749	ebay.com
11.		Canon G1 X Mark II	3/5	+	..	77/100	4/5	4.5/5	Feb 2014	EUR 849	ebay.com
12.		Nikon D70	..	..	..	+ +	..	..	Jan 2004	EUR 999	ebay.com
13.		Olympus E-410	..	86/100	..	+ +	4/5	4.5/5	Mar 2007	EUR 699	ebay.com
14.		Olympus E-420	..	85/100	..	+ +	4/5	4.5/5	Mar 2008	EUR 499	ebay.com
15.		Olympus E-500	..	76/100	..	+ +	..	..	Sep 2005	EUR 599	ebay.com
16.		Olympus E-510	..	89/100	..	+ +	3.5/5	4.5/5	Mar 2007	EUR 799	ebay.com
17.		Panasonic L10	..	85/100	..	+	3.5/5	4/5	Aug 2007	EUR 599	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted 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? In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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