Canon M3 vs Olympus E-300

The Canon EOS M3 and the Olympus Evolt E-300 are two digital cameras that were revealed to the public, respectively, in February 2015 and September 2004. The M3 is a mirrorless interchangeable lens camera, while the E-300 is a DSLR. The cameras are based on an APS-C (M3) and a Four Thirds (E-300) sensor. The Canon has a resolution of 24 megapixels, whereas the Olympus provides 8 MP.

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

Headline Specifications

Canon M3		Olympus E-300
Mirrorless system camera		Digital single lens reflex
Canon EF-M mount lenses		Four Thirds lenses
24 MP – APS-C sensor		8 MP – Four Thirds sensor
1080/30p Video		no Video
ISO 100-12,800 (100 - 25,600)		ISO 100-400 (100 - 1,600)
Viewfinder optional		Optical viewfinder
3.0" LCD – 1040k dots		1.8" LCD – 134k dots
Tilting touchscreen		Fixed screen (not touch-sensitive)
4.2 shutter flaps per second		2.5 shutter flaps per second
250 shots per battery charge		750 shots per battery charge
111 x 68 x 44 mm, 366 g		147 x 85 x 64 mm, 624 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS M3 and the Olympus Evolt E-300? 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 M3 and the Olympus E-300. 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.

The M3 can be obtained in two different colors (black, white), while the E-300 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 Olympus E-300 is considerably larger (66 percent) than the Canon M3. Moreover, the E-300 is substantially heavier (70 percent) than the M3. In this context, it is worth noting that neither the M3 nor the E-300 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. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

Concerning battery life, the M3 gets 250 shots out of its Canon LP-E17 battery, while the E-300 can take 750 images on a single charge of its Olympus BLM-1 power pack.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. 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 M3	111 mm	68 mm	44 mm	366 g	250	n	Feb 2015	EUR 749	ebay.com
2.		Olympus E-300	147 mm	85 mm	64 mm	624 g	750	n	Sep 2004	EUR 799	ebay.com
3.		Canon 350D	127 mm	94 mm	64 mm	540 g	400	n	Feb 2005	EUR 899	ebay.com
4.		Canon 750D	132 mm	101 mm	78 mm	555 g	440	n	Feb 2015	EUR 699	ebay.com
5.		Canon G5 X	112 mm	76 mm	44 mm	353 g	210	n	Oct 2015	EUR 789	ebay.com
6.		Canon G7 X	103 mm	60 mm	40 mm	304 g	210	n	Sep 2014	EUR 649	ebay.com
7.		Canon G7 X Mark II	106 mm	61 mm	42 mm	319 g	265	n	Feb 2016	EUR 685	ebay.com
8.		Canon M	109 mm	66 mm	32 mm	298 g	230	n	Jul 2012	EUR 599	ebay.com
9.		Canon M5	116 mm	89 mm	61 mm	427 g	295	n	Sep 2016	EUR 1 129	ebay.com
10.		Canon M6	112 mm	68 mm	45 mm	390 g	295	n	Feb 2017	EUR 799	ebay.com
11.		Canon M10	108 mm	67 mm	35 mm	301 g	255	n	Oct 2015	EUR 499	ebay.com
12.		Canon M100	108 mm	67 mm	35 mm	302 g	295	n	Aug 2017	EUR 479	ebay.com
13.		Leica Digilux 3	146 mm	87 mm	77 mm	606 g	750	n	Sep 2006	EUR 1 499	ebay.com
14.		Olympus E-330	140 mm	87 mm	72 mm	637 g	750	n	Jan 2006	EUR 999	ebay.com
15.		Olympus E-500	130 mm	95 mm	66 mm	479 g	750	n	Sep 2005	EUR 599	ebay.com
16.		Panasonic L1	146 mm	87 mm	64 mm	606 g	750	n	Feb 2006	EUR 999	ebay.com
17.		Sony A6000	120 mm	67 mm	45 mm	344 g	360	n	Feb 2014	EUR 549	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 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 M3 was launched at a somewhat lower price (by 15 percent) than the E-300, which makes it more attractive for photographers on a tight budget. 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 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. 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.

Of the two cameras under consideration, the Canon M3 features an APS-C sensor and the Olympus E-300 a Four Thirds sensor. The sensor area in the E-300 is 32 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 M3 has a native 3:2 aspect ratio, while the one in the E-300 offers a 4:3 aspect.

With 24MP, the M3 offers a higher resolution than the E-300 (8MP), but the M3 has smaller individual pixels (pixel pitch of 3.72μm versus 5.30μm for the E-300). However, the M3 is a much more recent model (by 10 years and 4 months) than the E-300, 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 M3 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the M3 for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 x 33.9 cm. The corresponding values for the Olympus E-300 are 16.3 x 12.2 inches or 41.5 x 31.1 cm for good quality, 13.1 x 9.8 inches or 33.2 x 24.9 cm for very good quality, and 10.9 x 8.2 inches or 27.6 x 20.7 cm for excellent quality prints.

The M3 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Canon EOS M3 has a native sensitivity range from ISO 100 to ISO 12800, which can be extended to ISO 100-25600. The corresponding ISO settings for the Olympus Evolt E-300 are ISO 100 to ISO 400, with the possibility to increase the ISO range to 100-1600.

In terms of underlying technology, the M3 is build around a CMOS sensor, while the E-300 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.

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 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 M3	APS-C	24.0	6000	4000	1080/30p	22.8	11.8	1169	72
2.		Olympus E-300	Four Thirds	8.0	3264	2448	none	20.4	10.1	-40	48
3.		Canon 350D	APS-C	8.0	3456	2304	none	21.8	10.8	637	60
4.		Canon 750D	APS-C	24.0	6000	4000	1080/30p	22.7	12.0	919	71
5.		Canon G5 X	1-inch	20.0	5472	3648	1080/60p	21.4	12.3	471	62
6.		Canon G7 X	1-inch	20.0	5472	3648	1080/60p	23.0	12.7	556	71
7.		Canon G7 X Mark II	1-inch	20.0	5472	3648	1080/60p	21.8	11.9	260	62
8.		Canon M	APS-C	17.9	5184	3456	1080/30p	22.1	11.2	827	65
9.		Canon M5	APS-C	24.0	6000	4000	1080/60p	23.4	12.4	1262	77
10.		Canon M6	APS-C	24.0	6000	4000	1080/60p	23.4	12.6	1317	78
11.		Canon M10	APS-C	17.9	5184	3456	1080/30p	22.2	11.4	753	65
12.		Canon M100	APS-C	24.0	6000	4000	1080/60p	23.5	12.9	1272	78
13.		Leica Digilux 3	Four Thirds	7.4	3136	2352	none	21.0	10.6	127	53
14.		Olympus E-330	Four Thirds	7.4	3136	2352	none	20.8	10.4	73	52
15.		Olympus E-500	Four Thirds	8.0	3264	2448	none	20.7	10.3	45	51
16.		Panasonic L1	Four Thirds	7.4	3136	2352	none	20.8	10.4	80	52
17.		Sony A6000	APS-C	24.0	6000	4000	1080/60p	24.1	13.1	1347	82
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 M3 indeed provides movie recording capabilities, while the E-300 does not. The highest resolution format that the M3 can use is 1080/30p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the E-300 has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the M3 relies on live view and the rear LCD for framing. That said, the M3 can be equipped with an optional viewfinder – the EVF-DC1. The table below summarizes some of the other core capabilities of the Canon M3 and Olympus E-300 in connection with corresponding information for a sample of similar 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 M3	optional	n	3.0 / 1040	tilting	Y	1/4000s	4.2/s	Y	n
2.		Olympus E-300	optical	n	1.8 / 134	fixed	n	1/4000s	2.5/s	Y	n
3.		Canon 350D	optical	n	1.8 / 115	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 G5 X	2360	n	3.0 / 1040	swivel	Y	1/2000s	5.9/s	Y	Y
6.		Canon G7 X	none	n	3.0 / 1040	tilting	Y	1/2000s	6.5/s	Y	Y
7.		Canon G7 X Mark II	none	n	3.0 / 1040	tilting	Y	1/2000s	8.0/s	Y	Y
8.		Canon M	none	n	3.0 / 1040	fixed	Y	1/4000s	4.3/s	n	n
9.		Canon M5	2360	n	3.2 / 1620	tilting	Y	1/4000s	9.0/s	Y	n
10.		Canon M6	optional	n	3.0 / 1040	tilting	Y	1/4000s	9.0/s	Y	n
11.		Canon M10	none	n	3.0 / 1040	tilting	Y	1/4000s	4.6/s	Y	n
12.		Canon M100	none	n	3.0 / 1040	tilting	Y	1/4000s	6.1/s	Y	n
13.		Leica Digilux 3	optical	n	2.5 / 207	fixed	n	1/4000s	3.0/s	Y	n
14.		Olympus E-330	optical	n	2.5 / 215	tilting	n	1/4000s	3.0/s	Y	n
15.		Olympus E-500	optical	n	2.5 / 215	fixed	n	1/4000s	2.5/s	Y	n
16.		Panasonic L1	optical	n	2.5 / 207	fixed	n	1/4000s	3.0/s	Y	n
17.		Sony A6000	1440	n	3.0 / 922	tilting	n	1/4000s	11.0/s	Y	n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The M3 has a touchscreen, while the E-300 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

The M3 writes its imaging data to SDXC cards, while the E-300 uses Compact Flash or xD Picture cards. The E-300 features dual card slots, which can be very useful in case a memory card fails. In contrast, the M3 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 M3 and Olympus Evolt E-300 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 M3	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
2.		Olympus E-300	Y	- / -	-	-	-	2.0	-	-	-
3.		Canon 350D	Y	- / -	-	-	-	2.0	-	-	-
4.		Canon 750D	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
5.		Canon G5 X	Y	stereo / mono	-	-	mini	2.0	Y	Y	-
6.		Canon G7 X	-	stereo / mono	-	-	micro	2.0	Y	Y	-
7.		Canon G7 X Mark II	-	stereo / mono	-	-	micro	2.0	Y	Y	-
8.		Canon M	Y	stereo / mono	Y	-	mini	2.0	-	-	-
9.		Canon M5	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
10.		Canon M6	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
11.		Canon M10	-	stereo / mono	-	-	mini	2.0	Y	Y	-
12.		Canon M100	-	stereo / mono	-	-	micro	2.0	Y	Y	Y
13.		Leica Digilux 3	Y	stereo / mono	-	-	-	2.0	-	-	-
14.		Olympus E-330	Y	- / -	-	-	-	2.0	-	-	-
15.		Olympus E-500	Y	- / -	-	-	-	2.0	-	-	-
16.		Panasonic L1	Y	- / -	-	-	-	2.0	-	-	-
17.		Sony A6000	Y	stereo / mono	-	-	micro	2.0	Y	Y	-

It is notable that the M3 offers wifi support, while the E-300 does not. Wifi can be a very convenient means to transfer image data to an off-camera location.

Both the M3 and the E-300 have been discontinued, but can regularly be found used on ebay. The E-300 was replaced by the Olympus E-330, while the M3 was followed by the Canon M6. Further information on the features and operation of the M3 and E-300 can be found, respectively, in the Canon M3 Manual (free pdf) or the online Olympus E-300 Manual.

Review summary

So what is the bottom line? Is there a clear favorite between the Canon M3 and the Olympus E-300? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.

Reasons to prefer the Canon EOS M3:

• More detail: Offers more megapixels (24 vs 8MP) with a 77% 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.
• Broader imaging potential: Can record not only still images but also 1080/30p movies.
• Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
• 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).
• More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
• Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
• More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
• Faster burst: Shoots at higher frequency (4.2 vs 2.5 flaps/sec) to capture the decisive moment.
• More compact: Is smaller (111x68mm vs 147x85mm) and thus needs less room in the bag.
• Less heavy: Is lighter (by 258g or 41 percent) and hence easier to carry around.
• More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
• Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
• Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
• More affordable: Was introduced into a lower priced segment (15 percent cheaper at launch).
• More modern: Reflects 10 years and 4 months of technical progress since the E-300 launch.

Arguments in favor of the Olympus Evolt E-300:

• Easier framing: Has an optical viewfinder for image composition and settings control.
• Longer lasting: Gets more shots (750 versus 250) out of a single battery charge.
• Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
• More heavily discounted: Has been around for much longer (launched in September 2004).

If the count of relative strengths (bullet points above) is taken as a measure, the M3 is the clear winner of the match-up (20 : 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.

How about other alternatives? Do the specifications of the Canon M3 and the Olympus E-300 place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best DSLR Camera listings 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 incomplete and does no justice, for example, to the way the M3 or the E-300 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 hands-on reviews by experts are important. The following table reports the overall ratings of the cameras as published by some of the major 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 M3	4/5	o	..	75/100	4.5/5	4/5	Feb 2015	EUR 749	ebay.com
2.		Olympus E-300	..	..	..	+	o	4.5/5	Sep 2004	EUR 799	ebay.com
3.		Canon 350D	..	80/100	..	+ +	o	..	Feb 2005	EUR 899	ebay.com
4.		Canon 750D	5/5	..	..	75/100	4.5/5	4.5/5	Feb 2015	EUR 699	ebay.com
5.		Canon G5 X	5/5	+ +	..	78/100	4.5/5	4.5/5	Oct 2015	EUR 789	ebay.com
6.		Canon G7 X	4/5	+ +	..	77/100	4.5/5	4.5/5	Sep 2014	EUR 649	ebay.com
7.		Canon G7 X Mark II	4.5/5	+ +	..	81/100	4.5/5	4.5/5	Feb 2016	EUR 685	ebay.com
8.		Canon M	3/5	+	..	..	4/5	4/5	Jul 2012	EUR 599	ebay.com
9.		Canon M5	4/5	+	4/5	82/100	4/5	4/5	Sep 2016	EUR 1 129	ebay.com
10.		Canon M6	..	..	..	80/100	4/5	4/5	Feb 2017	EUR 799	ebay.com
11.		Canon M10	..	..	..	..	..	4/5	Oct 2015	EUR 499	ebay.com
12.		Canon M100	3/5	+	..	..	4/5	3.5/5	Aug 2017	EUR 479	ebay.com
13.		Leica Digilux 3	..	..	..	..	..	..	Sep 2006	EUR 1 499	ebay.com
14.		Olympus E-330	..	..	..	+	o	..	Jan 2006	EUR 999	ebay.com
15.		Olympus E-500	..	76/100	..	+ +	..	..	Sep 2005	EUR 599	ebay.com
16.		Panasonic L1	..	85/100	..	+	..	3.5/5	Feb 2006	EUR 999	ebay.com
17.		Sony A6000	5/5	+	4.5/5	80/100	4.5/5	5/5	Feb 2014	EUR 549	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date 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 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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