Canon G12 vs Olympus E-510

The Canon PowerShot G12 and the Olympus E-510 are two digital cameras that were announced, respectively, in September 2010 and March 2007. The G12 is a fixed lens compact, while the E-510 is a DSLR. The cameras are based on a 1/1.7-inch (G12) and a Four Thirds (E-510) sensor. Both cameras offer a resolution of 10 megapixels.

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

Headline Specifications

Canon G12		Olympus E-510
Fixed lens compact camera		Digital single lens reflex
28-140mm f/2.8-4.5		Four Thirds lenses
10 MP – 1/1.7" sensor		10 MP – Four Thirds sensor
720/24p Video		no Video
ISO 80-3,200 (80 - 12,800)		ISO 100-1,600
Optical viewfinder		Optical viewfinder
2.8" LCD – 461k dots		2.5" LCD – 215k dots
Swivel screen (not touch-sensitive)		Fixed screen (not touch-sensitive)
1.1 shutter flaps per second		3 shutter flaps per second
Lens-based stabilization		In-body stabilization
370 shots per battery charge		750 shots per battery charge
112 x 76 x 48 mm, 401 g		136 x 92 x 68 mm, 538 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon PowerShot G12 and the Olympus E-510? 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 G12 and the Olympus E-510. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side 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 Olympus E-510 is considerably larger (47 percent) than the Canon G12. In this context, it is worth noting that neither the G12 nor the E-510 are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the G12 has a lens built in, whereas the E-510 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can compare the optics available for the E-510 and their specifications in the Four Thirds Lens Catalog.

Concerning battery life, the G12 gets 370 shots out of its Canon NB-7L battery, while the E-510 can take 750 images on a single charge of its Olympus BLM-1 power pack.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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	Street Price
1.		Canon G12	112 mm	76 mm	48 mm	401 g	370	n	Sep 2010	US$ 499	ebay.com
2.		Olympus E-510	136 mm	92 mm	68 mm	538 g	750	n	Mar 2007	US$ 799	ebay.com
3.		Canon G15	107 mm	76 mm	40 mm	352 g	350	n	Sep 2012	US$ 499	ebay.com
4.		Canon G16	109 mm	76 mm	40 mm	356 g	360	n	Aug 2013	US$ 549	ebay.com
5.		Canon SX50	123 mm	87 mm	106 mm	595 g	315	n	Sep 2012	US$ 429	ebay.com
6.		Fujifilm X10	117 mm	70 mm	57 mm	350 g	270	n	Sep 2011	US$ 599	ebay.com
7.		Nikon P7800	119 mm	78 mm	50 mm	399 g	350	n	Sep 2013	US$ 549	ebay.com
8.		Olympus E-400	130 mm	91 mm	53 mm	435 g	500	n	Sep 2006	US$ 699	ebay.com
9.		Olympus E-410	130 mm	91 mm	53 mm	435 g	500	n	Mar 2007	US$ 699	ebay.com
10.		Olympus E-450	130 mm	91 mm	53 mm	440 g	500	n	Mar 2009	US$ 499	ebay.com
11.		Olympus E-500	130 mm	95 mm	66 mm	479 g	750	n	Sep 2005	US$ 599	ebay.com
12.		Olympus E-520	136 mm	92 mm	68 mm	535 g	750	n	May 2008	US$ 699	ebay.com
13.		Olympus E-620	130 mm	94 mm	60 mm	521 g	500	n	Feb 2009	US$ 699	ebay.com
14.		Panasonic FZ150	124 mm	82 mm	92 mm	528 g	410	n	Aug 2011	US$ 499	ebay.com
15.		Panasonic G2	124 mm	84 mm	74 mm	428 g	360	n	Mar 2010	US$ 599	ebay.com
16.		Panasonic G10	124 mm	84 mm	74 mm	388 g	380	n	Mar 2010	US$ 499	ebay.com
17.		Panasonic LX5	110 mm	65 mm	43 mm	271 g	400	n	Jul 2010	US$ 499	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 G12 was launched at a lower price than the E-510, despite having a lens built in. 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. 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. 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. 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Canon G12 features a 1/1.7-inch sensor and the Olympus E-510 a Four Thirds sensor. The sensor area in the E-510 is 423 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 4.6 and 2.0. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.

Even though the E-510 has a larger sensor, both cameras offer the same resolution of 10 megapixels. This implies that the E-510 has a lower pixel density and larger individual pixels (with a pixel pitch of 4.74μm versus 2.07μm for the G12), which gives it a potential advantage in terms of light gathering capacity. It should, however, be noted that the G12 is much more recent (by 3 years and 6 months) than the E-510, and its sensor will have benefitted from technological advances during this time that at least partly compensate for the smaller pixel size.

The Canon PowerShot G12 has a native sensitivity range from ISO 80 to ISO 3200, which can be extended to ISO 80-12800. The corresponding ISO settings for the Olympus E-510 are ISO 100 to ISO 1600 (no boost).

In terms of underlying technology, the G12 is build around a CCD sensor, while the E-510 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.

For many cameras, data on sensor performance has been reported by DXO Mark. 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"). Of the two cameras under consideration, the E-510 has a markedly higher DXO score than the G12 (overall score 5 points higher), which will translate into better image quality. The advantage is based on 0.8 bits higher color depth, 1.2 EV of lower dynamic range, and 1.5 stops in additional low light sensitivity. 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 G12	1/1.7	10.0	3648	2736	720/24p	20.4	11.2	161	47
2.		Olympus E-510	Four Thirds	10.0	3648	2736	none	21.2	10.0	442	52
3.		Canon G15	1/1.7	12.0	4000	3000	1080/24p	19.9	11.5	165	46
4.		Canon G16	1/1.7	12.0	4000	3000	1080/60p	21.0	11.7	230	54
5.		Canon SX50	1/2.3	12.0	4000	3000	1080/24p	20.3	11.2	179	47
6.		Fujifilm X10	2/3	12.0	4000	3000	1080/30p	20.5	11.3	245	50
7.		Nikon P7800	1/1.7	12.0	4000	3000	1080/30p	21.2	11.7	200	54
8.		Olympus E-400	Four Thirds	10.0	3648	2736	none	21.0	10.6	127	53
9.		Olympus E-410	Four Thirds	10.0	3648	2736	none	21.1	10.0	494	51
10.		Olympus E-450	Four Thirds	10.0	3648	2736	none	21.5	10.5	512	56
11.		Olympus E-500	Four Thirds	8.0	3264	2448	none	20.7	10.3	45	51
12.		Olympus E-520	Four Thirds	10.0	3648	2736	none	21.4	10.4	548	55
13.		Olympus E-620	Four Thirds	12.2	4032	3024	none	21.3	10.3	536	55
14.		Panasonic FZ150	1/2.3	12.0	4000	3000	1080/60p	19.4	10.9	132	40
15.		Panasonic G2	Four Thirds	12.0	4000	3000	720/30p	21.2	10.3	493	53
16.		Panasonic G10	Four Thirds	12.0	4000	3000	720/30p	21.2	10.1	411	52
17.		Panasonic LX5	1/1.7	10.0	3648	2736	720/60p	19.6	10.8	132	41
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 G12 indeed provides movie recording capabilities, while the E-510 does not. The highest resolution format that the G12 can use is 720/24p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The G12 and the E-510 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 table below summarizes some of the other core capabilities of the Canon G12 and Olympus E-510 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 G12	optical	n	2.8 / 461	swivel	n	1/4000s	1.1/s	Y	Y
2.		Olympus E-510	optical	n	2.5 / 215	fixed	n	1/4000s	3.0/s	Y	Y
3.		Canon G15	optical	n	3.0 / 922	fixed	n	1/4000s	2.1/s	Y	Y
4.		Canon G16	optical	n	3.0 / 922	fixed	n	1/4000s	2.2/s	Y	Y
5.		Canon SX50	202	n	3.0 / 461	swivel	n	1/2000s	2.2/s	Y	Y
6.		Fujifilm X10	optical	n	2.8 / 460	fixed	n	1/4000s	10.0/s	Y	Y
7.		Nikon P7800	921	n	3.0 / 921	swivel	n	1/4000s	8.0/s	Y	Y
8.		Olympus E-400	optical	n	2.5 / 215	fixed	n	1/4000s	3.0/s	Y	n
9.		Olympus E-410	optical	n	2.5 / 215	fixed	n	1/4000s	3.0/s	Y	n
10.		Olympus E-450	optical	n	2.7 / 215	fixed	n	1/4000s	3.5/s	Y	n
11.		Olympus E-500	optical	n	2.5 / 215	fixed	n	1/4000s	2.5/s	Y	n
12.		Olympus E-520	optical	n	2.7 / 215	fixed	n	1/4000s	3.5/s	Y	Y
13.		Olympus E-620	optical	n	2.7 / 230	swivel	n	1/4000s	4.0/s	Y	Y
14.		Panasonic FZ150	202	n	3.0 / 460	swivel	n	1/2000s	12.0/s	Y	Y
15.		Panasonic G2	1440	n	3.0 / 460	swivel	Y	1/4000s	2.6/s	Y	n
16.		Panasonic G10	202	n	3.0 / 460	fixed	n	1/4000s	2.6/s	Y	n
17.		Panasonic LX5	optional	n	3.0 / 460	fixed	n	1/4000s	2.5/s	Y	Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

The G12 writes its imaging data to SDXC cards, while the E-510 uses Compact Flash or xD Picture cards. The E-510 features dual card slots, which can be very useful in case a memory card fails. In contrast, the G12 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 PowerShot G12 and Olympus E-510 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 G12	Y	stereo / mono	-	-	mini	2.0	-	-	-
2.		Olympus E-510	Y	- / -	-	-	-	2.0	-	-	-
3.		Canon G15	Y	stereo / mono	-	-	mini	2.0	-	-	-
4.		Canon G16	Y	stereo / mono	-	-	mini	2.0	Y	-	-
5.		Canon SX50	Y	stereo / mono	-	-	mini	2.0	-	-	-
6.		Fujifilm X10	Y	stereo / mono	-	-	mini	2.0	-	-	-
7.		Nikon P7800	Y	stereo / mono	Y	-	mini	2.0	-	-	-
8.		Olympus E-400	Y	- / -	-	-	-	2.0	-	-	-
9.		Olympus E-410	Y	- / -	-	-	-	2.0	-	-	-
10.		Olympus E-450	Y	- / -	-	-	-	2.0	-	-	-
11.		Olympus E-500	Y	- / -	-	-	-	2.0	-	-	-
12.		Olympus E-520	Y	- / -	-	-	-	2.0	-	-	-
13.		Olympus E-620	Y	- / -	-	-	-	2.0	-	-	-
14.		Panasonic FZ150	Y	stereo / -	-	-	mini	2.0	-	-	-
15.		Panasonic G2	Y	stereo / mono	-	-	mini	2.0	-	-	-
16.		Panasonic G10	Y	mono / -	-	-	mini	2.0	-	-	-
17.		Panasonic LX5	Y	mono / mono	-	-	mini	2.0	-	-	-

Both the G12 and the E-510 have been discontinued, but can regularly be found used on ebay. The E-510 was replaced by the Olympus E-520, while the G12 was followed by the Canon G15. Further information on the features and operation of the G12 and E-510 can be found, respectively, in the Canon G12 Manual (free pdf) or the online Olympus E-510 Manual.

Review summary

So what is the bottom line? Is there a clear favorite between the Canon G12 and the Olympus E-510? Which camera is better? The listing below highlights the relative strengths of the two models.

Reasons to prefer the Canon PowerShot G12:

• More dynamic range: Captures a larger spectrum of light and dark details (1.2 EV of extra DR).
• Broader imaging potential: Can record not only still images but also 720/24p movies.
• Larger screen: Has a bigger rear LCD (2.8" vs 2.5") for image review and settings control.
• More detailed LCD: Has a higher resolution rear screen (461k vs 215k dots).
• More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
• Ready to shoot: Comes with a built-in lens, while the E-510 requires a separate lens.
• More compact: Is smaller (112x76mm vs 136x92mm) and thus needs less room in the bag.
• Less heavy: Is lighter even though it comes with a built-in lens (unlike the E-510).
• More affordable: Was introduced at a lower price, despite coming with a built-in lens.
• More modern: Reflects 3 years and 6 months of technical progress since the E-510 launch.

Advantages of the Olympus E-510:

• Better image quality: Scores markedly higher (5 points) in the DXO overall evaluation.
• Better low-light sensitivity: Can shoot in dim conditions (1.5 stops ISO advantage).
• Faster burst: Shoots at higher frequency (3 vs 1.1 flaps/sec) to capture the decisive moment.
• More flexible: Makes it possible to change lenses and thus to use specialty optics.
• Longer lasting: Gets more shots (750 versus 370) 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 March 2007).

If the number of relative strengths (bullet points above) is taken as a guide, the G12 emerges as the winner of the contest (10 : 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 wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro 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 G12 and the Olympus E-510 place the cameras among the top in their class? Find out in the latest Best Travel-Zoom Camera and Best DSLR Camera listings 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 says little about, for example, the shooting experience and imaging performance of the G12 and the E-510 in practical situations. 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 why hands-on reviews by experts are important. 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	Street Price
1.		Canon G12	4/5	+	..	73/100	4.5/5	4.5/5	Sep 2010	US$ 499	ebay.com
2.		Olympus E-510	..	89/100	..	+ +	3.5/5	4.5/5	Mar 2007	US$ 799	ebay.com
3.		Canon G15	4/5	+	..	76/100	4.5/5	4.5/5	Sep 2012	US$ 499	ebay.com
4.		Canon G16	4/5	+	..	..	4.5/5	4.5/5	Aug 2013	US$ 549	ebay.com
5.		Canon SX50	3/5	+ +	..	72/100	4.5/5	4.5/5	Sep 2012	US$ 429	ebay.com
6.		Fujifilm X10	..	..	..	76/100	4/5	4.5/5	Sep 2011	US$ 599	ebay.com
7.		Nikon P7800	3/5	..	..	..	4/5	4.5/5	Sep 2013	US$ 549	ebay.com
8.		Olympus E-400	..	85/100	..	..	4/5	4/5	Sep 2006	US$ 699	ebay.com
9.		Olympus E-410	..	86/100	..	+ +	4/5	4.5/5	Mar 2007	US$ 699	ebay.com
10.		Olympus E-450	..	..	..	..	4/5	4/5	Mar 2009	US$ 499	ebay.com
11.		Olympus E-500	..	76/100	..	+ +	..	..	Sep 2005	US$ 599	ebay.com
12.		Olympus E-520	..	87/100	..	+ +	4.5/5	4.5/5	May 2008	US$ 699	ebay.com
13.		Olympus E-620	3/5	88/100	..	72/100	4.5/5	5/5	Feb 2009	US$ 699	ebay.com
14.		Panasonic FZ150	3/5	+ +	..	76/100	4/5	4.5/5	Aug 2011	US$ 499	ebay.com
15.		Panasonic G2	..	..	..	72/100	4/5	4.5/5	Mar 2010	US$ 599	ebay.com
16.		Panasonic G10	3/5	..	..	70/100	4/5	4/5	Mar 2010	US$ 499	ebay.com
17.		Panasonic LX5	4/5	+	..	73/100	4.5/5	4.5/5	Jul 2010	US$ 499	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. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. 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

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