Canon 550D vs S120

The Canon EOS 550D (called Canon T2i in some regions) and the Canon PowerShot S120 are two digital cameras that were revealed to the public, respectively, in February 2010 and August 2013. The 550D is a DSLR, while the S120 is a fixed lens compact. The cameras are based on an APS-C (550D) and a 1/1.7-inch (S120) sensor. The 550D has a resolution of 17.9 megapixels, whereas the S120 provides 12 MP.

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

Headline Specifications

Canon 550D		Canon S120
Digital single lens reflex		Fixed lens compact camera
Canon EF mount lenses		24-120mm f/1.8-5.7
17.9 MP – APS-C sensor		12 MP – 1/1.7" sensor
1080/30p Video		1080/60p Video
ISO 100-6,400 (100 - 12,800)		ISO 80-12,800
Optical viewfinder		No viewfinder, LCD framing
3.0" LCD – 1040k dots		3.0" LCD – 922k dots
Fixed screen (not touch-sensitive)		Fixed touchscreen
3.7 shutter flaps per second		12.1 shutter flaps per second
440 shots per battery charge		230 shots per battery charge
129 x 98 x 62 mm, 530 g		100 x 59 x 29 mm, 217 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 550D and the Canon PowerShot S120? 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 550D and the Canon S120 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 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 Canon S120 is considerably smaller (53 percent) than the Canon 550D. In this context, it is worth noting that neither the 550D nor the S120 are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the S120 has a lens built in, whereas the 550D 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 550D and their specifications in the Canon EF Lens Catalog.

Concerning battery life, the 550D gets 440 shots out of its Canon LP-E8 battery, while the S120 can take 230 images on a single charge of its Canon NB-6LH 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 (USD)	Street Price
1.		Canon 550D	129 mm	98 mm	62 mm	530 g	440	n	Feb 2010	699	ebay.com
2.		Canon S120	100 mm	59 mm	29 mm	217 g	230	n	Aug 2013	449	ebay.com
3.		Canon 4000D	129 mm	102 mm	77 mm	436 g	500	n	Feb 2018	399	amazon.com
4.		Canon 750D	132 mm	101 mm	78 mm	555 g	440	n	Feb 2015	749	ebay.com
5.		Canon 760D	132 mm	101 mm	78 mm	565 g	440	n	Feb 2015	649	ebay.com
6.		Canon 1200D	130 mm	100 mm	78 mm	480 g	500	n	Feb 2014	449	ebay.com
7.		Canon G1 X Mark II	116 mm	74 mm	66 mm	553 g	240	n	Feb 2014	799	ebay.com
8.		Canon 700D	133 mm	100 mm	79 mm	580 g	440	n	Mar 2013	649	ebay.com
9.		Canon G16	109 mm	76 mm	40 mm	356 g	360	n	Aug 2013	549	ebay.com
10.		Canon 650D	133 mm	100 mm	79 mm	575 g	440	n	Jun 2012	849	ebay.com
11.		Canon G15	107 mm	76 mm	40 mm	352 g	350	n	Sep 2012	499	ebay.com
12.		Canon SX50	123 mm	87 mm	106 mm	595 g	315	n	Sep 2012	429	ebay.com
13.		Canon 600D	133 mm	100 mm	80 mm	570 g	440	n	Feb 2011	599	ebay.com
14.		Canon 1100D	130 mm	100 mm	78 mm	495 g	700	n	Feb 2011	449	ebay.com
15.		Canon 500D	129 mm	98 mm	62 mm	520 g	400	n	Mar 2009	799	ebay.com
16.		Nikon D5100	128 mm	97 mm	79 mm	560 g	660	n	Apr 2011	749	ebay.com
17.		Panasonic LF1	103 mm	62 mm	28 mm	192 g	250	n	Apr 2013	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

The price is, of course, an important factor in any camera decision. 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 S120 was launched at a lower price than the 550D, despite having a lens built in. 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 imaging sensor is a crucial determinant 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. 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 550D features an APS-C sensor and the Canon S120 a 1/1.7-inch sensor. The sensor area in the S120 is 87 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.6 and 4.5. The sensor in the 550D has a native 3:2 aspect ratio, while the one in the S120 offers a 4:3 aspect.

With 17.9MP, the 550D offers a higher resolution than the S120 (12MP), but the 550D nevertheless has larger individual pixels (pixel pitch of 4.31μm versus 1.89μm for the S120) due to its larger sensor. However, the S120 is a much more recent model (by 3 years and 6 months) than the 550D, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels.

The resolution advantage of the Canon 550D implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 550D 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 Canon S120 are 20 x 15 inches or 50.8 x 38.1 cm for good quality, 16 x 12 inches or 40.6 x 30.5 cm for very good quality, and 13.3 x 10 inches or 33.9 x 25.4 cm for excellent quality prints.

The Canon EOS 550D has a native sensitivity range from ISO 100 to ISO 6400, which can be extended to ISO 100-12800. The corresponding ISO settings for the Canon PowerShot S120 are ISO 80 to ISO 12800 (no boost).

In terms of underlying technology, the 550D is build around a CMOS sensor, while the S120 uses a BSI-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 review, the 550D has a notably higher overall DXO score than the S120 (overall score 10 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 0.8 bits higher color depth, 0.4 EV of lower dynamic range, and 1.7 stops in additional low light sensitivity. 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 550D	APS-C	17.9	5184	3456	1080/30p	22.1	11.5	784	66
2.		Canon S120	1/1.7	12.0	4000	3000	1080/60p	21.3	11.9	246	56
3.		Canon 4000D	APS-C	17.9	5184	3456	1080/30p	21.9	11.4	695	63
4.		Canon 750D	APS-C	24.0	6000	4000	1080/30p	22.7	12.0	919	71
5.		Canon 760D	APS-C	24.0	6000	4000	1080/30p	22.6	12.0	915	70
6.		Canon 1200D	APS-C	17.9	5184	3456	1080/30p	21.9	11.3	724	63
7.		Canon G1 X Mark II	1.5-inch	13.0	4160	3120	1080/30p	21.5	10.8	581	58
8.		Canon 700D	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	681	61
9.		Canon G16	1/1.7	12.0	4000	3000	1080/60p	21.0	11.7	230	54
10.		Canon 650D	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	722	62
11.		Canon G15	1/1.7	12.0	4000	3000	1080/24p	19.9	11.5	165	46
12.		Canon SX50	1/2.3	12.0	4000	3000	1080/24p	20.3	11.2	179	47
13.		Canon 600D	APS-C	17.9	5184	3456	1080/30p	22.1	11.5	793	65
14.		Canon 1100D	APS-C	12.2	4272	2848	720/30p	21.9	11.0	755	62
15.		Canon 500D	APS-C	15.1	4752	3168	1080/20p	21.7	11.5	663	63
16.		Nikon D5100	APS-C	16.1	4928	3264	1080/30p	23.5	13.6	1183	80
17.		Panasonic LF1	1/1.7	12.0	4000	3000	1080/60i	20.8	11.6	211	52

Many modern cameras cannot only take still pictures, but also record videos. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the S120 provides a faster frame rate than the 550D. It can shoot movie footage at 1080/60p, while the 550D is limited to 1080/30p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the 550D has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the S120 relies on live view and the rear LCD for framing. The following table reports on some other key feature differences and similarities of the Canon 550D, the Canon S120, 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 550D	optical	n	3.0 / 1040	fixed	n	1/4000s	3.7/s	Y	n
2.		Canon S120	none	n	3.0 / 922	fixed	Y	1/2000s	12.1/s	Y	Y
3.		Canon 4000D	optical	n	2.7 / 230	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 760D	optical	Y	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
6.		Canon 1200D	optical	n	3.0 / 460	fixed	n	1/4000s	3.0/s	Y	n
7.		Canon G1 X Mark II	optional	n	3.0 / 1040	tilting	Y	1/4000s	5.2/s	Y	Y
8.		Canon 700D	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
9.		Canon G16	optical	n	3.0 / 922	fixed	n	1/4000s	2.2/s	Y	Y
10.		Canon 650D	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
11.		Canon G15	optical	n	3.0 / 922	fixed	n	1/4000s	2.1/s	Y	Y
12.		Canon SX50	202	n	3.0 / 461	swivel	n	1/2000s	2.2/s	Y	Y
13.		Canon 600D	optical	n	3.0 / 1040	swivel	n	1/4000s	3.7/s	Y	n
14.		Canon 1100D	optical	n	2.7 / 230	fixed	n	1/4000s	3.0/s	Y	n
15.		Canon 500D	optical	n	3.0 / 920	fixed	n	1/4000s	3.4/s	Y	n
16.		Nikon D5100	optical	n	3.0 / 921	swivel	n	1/4000s	4.0/s	Y	n
17.		Panasonic LF1	200	n	3.0 / 920	fixed	n	1/4000s	10.0/s	Y	Y
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 S120 has a touchscreen, while the 550D has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

The Canon S120 has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

Concerning the storage of imaging data, both the 550D and the S120 write their files to SDXC cards. The S120 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the 550D cannot take advantage of Ultra High Speed SD cards.

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 550D and Canon PowerShot S120 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 550D	Y	stereo / -	Y	-	mini	2.0	-	-	-
2.		Canon S120	-	stereo / mono	-	-	mini	2.0	Y	-	-
3.		Canon 4000D	Y	mono / mono	-	-	mini	2.0	Y	Y	-
4.		Canon 750D	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
5.		Canon 760D	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
6.		Canon 1200D	Y	mono / mono	-	-	mini	2.0	-	-	-
7.		Canon G1 X Mark II	Y	stereo / mono	-	-	mini	2.0	Y	Y	-
8.		Canon 700D	Y	stereo / mono	Y	-	mini	2.0	-	-	-
9.		Canon G16	Y	stereo / mono	-	-	mini	2.0	Y	-	-
10.		Canon 650D	Y	stereo / mono	Y	-	mini	2.0	-	-	-
11.		Canon G15	Y	stereo / mono	-	-	mini	2.0	-	-	-
12.		Canon SX50	Y	stereo / mono	-	-	mini	2.0	-	-	-
13.		Canon 600D	Y	mono / mono	Y	-	mini	2.0	-	-	-
14.		Canon 1100D	Y	stereo / mono	-	-	mini	2.0	-	-	-
15.		Canon 500D	Y	mono / mono	-	-	mini	2.0	-	-	-
16.		Nikon D5100	Y	mono / mono	Y	-	mini	2.0	-	-	-
17.		Panasonic LF1	-	stereo / mono	-	-	mini	2.0	Y	Y	-

It is notable that the 550D has a hotshoe, while the S120 does not. This socket makes it possible to easily attach optional accessories, such as an external flash gun.

Both the 550D and the S120 have been discontinued, but can regularly be found used on ebay. The 550D was replaced by the Canon 600D, while the S120 does not have a direct successor. Further information on the features and operation of the 550D and S120 can be found, respectively, in the Canon 550D Manual (free pdf) or the online Canon S120 Manual.

Review summary

So how do things add up? Is the Canon 550D better than the Canon S120 or vice versa? The listing below highlights the relative strengths of the two models.

Reasons to prefer the Canon EOS 550D:

• More detail: Offers more megapixels (17.9 vs 12MP) with a 25% higher linear resolution.
• Better image quality: Scores markedly higher (10 points) in the DXO overall assessment.
• Better low-light sensitivity: Requires less light for good images (1.7 stops ISO advantage).
• Better sound: Can connect to an external microphone for higher quality sound recording.
• Easier framing: Has an optical viewfinder for image composition and settings control.
• More detailed LCD: Has a higher resolution rear screen (1040k vs 922k dots).
• Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/2000s) to freeze action.
• More flexible: Can take a variety of interchangeable lenses, including specialty optics.
• Longer lasting: Can take more shots (440 versus 230) on a single battery charge.
• Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
• More heavily discounted: Has been available for much longer (launched in February 2010).

Arguments in favor of the Canon PowerShot S120:

• Better video: Provides higher movie framerates (1080/60p versus 1080/30p).
• Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
• Faster burst: Shoots at higher frequency (12.1 vs 3.7 flaps/sec) to capture the decisive moment.
• Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
• Ready to shoot: Comes with an integrated lens, while the 550D requires a separate lens.
• More compact: Is smaller (100x59mm vs 129x98mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight even though it has a lens built in (unlike the 550D).
• Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
• Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
• Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
• 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 550D launch.

If the count of relative strengths (bullet points above) is taken as a measure, the S120 comes out slightly ahead of the 550D (12 : 11 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 550D and the Canon S120 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Travel-Zoom Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the 550D or the S120 perform in practice. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.

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 (USD)	Street Price
1.		Canon 550D	..	+ +	..	77/100	4/5	4.5/5	Feb 2010	699	ebay.com
2.		Canon S120	..	+ +	..	..	4.5/5	4.5/5	Aug 2013	449	ebay.com
3.		Canon 4000D	2.5/5	o	3/5	..	3.5/5	3.5/5	Feb 2018	399	amazon.com
4.		Canon 750D	5/5	..	..	75/100	4.5/5	4.5/5	Feb 2015	749	ebay.com
5.		Canon 760D	5/5	+	..	77/100	4.5/5	4.5/5	Feb 2015	649	ebay.com
6.		Canon 1200D	3/5	+	..	..	4/5	4.5/5	Feb 2014	449	ebay.com
7.		Canon G1 X Mark II	3/5	+	..	77/100	4/5	4.5/5	Feb 2014	799	ebay.com
8.		Canon 700D	..	..	..	76/100	4.5/5	4.5/5	Mar 2013	649	ebay.com
9.		Canon G16	4/5	+	..	..	4.5/5	4.5/5	Aug 2013	549	ebay.com
10.		Canon 650D	4/5	+ +	..	77/100	4.5/5	4.5/5	Jun 2012	849	ebay.com
11.		Canon G15	4/5	+	..	76/100	4.5/5	4.5/5	Sep 2012	499	ebay.com
12.		Canon SX50	3/5	+ +	..	72/100	4.5/5	4.5/5	Sep 2012	429	ebay.com
13.		Canon 600D	3/5	o	..	77/100	4.5/5	4.5/5	Feb 2011	599	ebay.com
14.		Canon 1100D	..	80/100	..	69/100	4/5	4.5/5	Feb 2011	449	ebay.com
15.		Canon 500D	..	+ +	..	74/100	4.5/5	4.5/5	Mar 2009	799	ebay.com
16.		Nikon D5100	5/5	+ +	..	76/100	4.5/5	4.5/5	Apr 2011	749	ebay.com
17.		Panasonic LF1	3/5	+	..	..	4/5	4.5/5	Apr 2013	499	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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. 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

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