Canon SL1 vs G15

The Canon EOS Rebel SL1 (called Canon 100D in some regions) and the Canon PowerShot G15 are two digital cameras that were announced, respectively, in March 2013 and September 2012. The SL1 is a DSLR, while the G15 is a fixed lens compact. The cameras are based on an APS-C (SL1) and a 1/1.7-inch (G15) sensor. The SL1 has a resolution of 17.9 megapixels, whereas the G15 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 SL1		Canon G15
Digital single lens reflex		Fixed lens compact camera
Canon EF mount lenses		28-140mm f/1.8-2.8
17.9 MP – APS-C sensor		12 MP – 1/1.7" sensor
1080/30p Video		1080/24p Video
ISO 100-12,800 (100 - 25,600)		ISO 80-12,800
Optical viewfinder		Optical viewfinder
3.0" LCD – 1040k dots		3.0" LCD – 922k dots
Fixed touchscreen		Fixed screen (not touch-sensitive)
4.9 shutter flaps per second		2.1 shutter flaps per second
380 shots per battery charge		350 shots per battery charge
117 x 91 x 69 mm, 407 g		107 x 76 x 40 mm, 352 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS Rebel SL1 and the Canon PowerShot G15? 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 SL1 and the Canon G15 are illustrated in the side-by-side display below. 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.

The SL1 can be obtained in two different colors (black, white), while the G15 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 G15 is notably smaller (24 percent) than the Canon SL1. In this context, it is worth noting that neither the SL1 nor the G15 are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the G15 has a lens built in, whereas the SL1 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 SL1 and their specifications in the Canon EF Lens Catalog.

Concerning battery life, the SL1 gets 380 shots out of its Canon LP-E12 battery, while the G15 can take 350 images on a single charge of its Canon NB-10L 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.		Canon SL1	117 mm	91 mm	69 mm	407 g	380	n	Mar 2013	549	ebay.com
2.		Canon G15	107 mm	76 mm	40 mm	352 g	350	n	Sep 2012	499	ebay.com
3.		Canon G12	112 mm	76 mm	48 mm	401 g	370	n	Sep 2010	499	ebay.com
4.		Canon G16	109 mm	76 mm	40 mm	356 g	360	n	Aug 2013	549	ebay.com
5.		Canon M	109 mm	66 mm	32 mm	298 g	230	n	Jul 2012	599	ebay.com
6.		Canon M10	108 mm	67 mm	35 mm	301 g	255	n	Oct 2015	499	ebay.com
7.		Canon SL2	122 mm	93 mm	70 mm	453 g	650	n	Jun 2017	549	ebay.com
8.		Canon SX50	123 mm	87 mm	106 mm	595 g	315	n	Sep 2012	429	ebay.com
9.		Canon T3i	133 mm	100 mm	80 mm	570 g	440	n	Feb 2011	599	ebay.com
10.		Canon T4i	133 mm	100 mm	79 mm	575 g	440	n	Jun 2012	849	ebay.com
11.		Canon T5	130 mm	100 mm	78 mm	480 g	500	n	Feb 2014	449	ebay.com
12.		Canon T5i	133 mm	100 mm	79 mm	580 g	440	n	Mar 2013	649	ebay.com
13.		Canon T6	129 mm	101 mm	78 mm	485 g	500	n	Mar 2016	449	ebay.com
14.		Canon T100	129 mm	102 mm	77 mm	436 g	500	n	Feb 2018	399	amazon.com
15.		Fujifilm X10	117 mm	70 mm	57 mm	350 g	270	n	Sep 2011	599	ebay.com
16.		Panasonic LX7	111 mm	68 mm	46 mm	298 g	330	n	Jul 2012	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 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 G15 was launched at a lower price than the SL1, 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.

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 generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have richer color-depth than smaller pixels 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 tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Canon SL1 features an APS-C sensor and the Canon G15 a 1/1.7-inch sensor. The sensor area in the G15 is 87 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.6 and 4.6. The sensor in the SL1 has a native 3:2 aspect ratio, while the one in the G15 offers a 4:3 aspect.

With 17.9MP, the SL1 offers a higher resolution than the G15 (12MP), but the SL1 nevertheless has larger individual pixels (pixel pitch of 4.31μm versus 1.89μm for the G15) due to its larger sensor. Moreover, the SL1 is a somewhat more recent model (by 6 months) than the G15, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels.

The resolution advantage of the Canon SL1 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the SL1 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 G15 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 SL1 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Canon EOS Rebel SL1 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 Canon PowerShot G15 are ISO 80 to ISO 12800 (no boost).

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 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. Of the two cameras under review, the SL1 provides substantially higher image quality than the G15, with an overall score that is 17 points higher. This advantage is based on 1.9 bits higher color depth, 0.2 EV of lower dynamic range, and 2.4 stops in additional low light sensitivity. 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 SL1	APS-C	17.9	5184	3456	1080/30p	21.8	11.3	843	63
2.		Canon G15	1/1.7	12.0	4000	3000	1080/24p	19.9	11.5	165	46
3.		Canon G12	1/1.7	10.0	3648	2736	720/24p	20.4	11.2	161	47
4.		Canon G16	1/1.7	12.0	4000	3000	1080/60p	21.0	11.7	230	54
5.		Canon M	APS-C	17.9	5184	3456	1080/30p	22.1	11.2	827	65
6.		Canon M10	APS-C	17.9	5184	3456	1080/30p	22.2	11.4	753	65
7.		Canon SL2	APS-C	24.0	6000	4000	1080/60p	23.6	13.4	1041	79
8.		Canon SX50	1/2.3	12.0	4000	3000	1080/24p	20.3	11.2	179	47
9.		Canon T3i	APS-C	17.9	5184	3456	1080/30p	22.1	11.5	793	65
10.		Canon T4i	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	722	62
11.		Canon T5	APS-C	17.9	5184	3456	1080/30p	21.9	11.3	724	63
12.		Canon T5i	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	681	61
13.		Canon T6	APS-C	17.9	5184	3456	1080/30p	22.0	11.7	781	66
14.		Canon T100	APS-C	17.9	5184	3456	1080/30p	21.9	11.4	695	63
15.		Fujifilm X10	2/3	12.0	4000	3000	1080/30p	20.5	11.3	245	50
16.		Panasonic LX7	1/1.7	10.0	3648	2736	1080/60p	20.7	11.7	147	50

Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the SL1 provides a higher frame rate than the G15. It can shoot video footage at 1080/30p, while the G15 is limited to 1080/24p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The SL1 and the G15 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 SL1 and Canon G15 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 SL1	optical	n	3.0 / 1040	fixed	Y	1/4000s	4.9/s	Y	n
2.		Canon G15	optical	n	3.0 / 922	fixed	n	1/4000s	2.1/s	Y	Y
3.		Canon G12	optical	n	2.8 / 461	swivel	n	1/4000s	1.1/s	Y	Y
4.		Canon G16	optical	n	3.0 / 922	fixed	n	1/4000s	2.2/s	Y	Y
5.		Canon M	none	n	3.0 / 1040	fixed	Y	1/4000s	4.3/s	n	n
6.		Canon M10	none	n	3.0 / 1040	tilting	Y	1/4000s	4.6/s	Y	n
7.		Canon SL2	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
8.		Canon SX50	202	n	3.0 / 461	swivel	n	1/2000s	2.2/s	Y	Y
9.		Canon T3i	optical	n	3.0 / 1040	swivel	n	1/4000s	3.7/s	Y	n
10.		Canon T4i	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
11.		Canon T5	optical	n	3.0 / 460	fixed	n	1/4000s	3.0/s	Y	n
12.		Canon T5i	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
13.		Canon T6	optical	n	3.0 / 920	fixed	n	1/4000s	3.0/s	Y	n
14.		Canon T100	optical	n	2.7 / 230	fixed	n	1/4000s	3.0/s	Y	n
15.		Fujifilm X10	optical	n	2.8 / 460	fixed	n	1/4000s	10.0/s	Y	Y
16.		Panasonic LX7	optional	n	3.0 / 920	fixed	n	1/4000s	11.0/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 SL1 has a touchscreen, while the G15 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

Concerning the storage of imaging data, both the SL1 and the G15 write their files to SDXC cards. The SL1 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the G15 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 Rebel SL1 and Canon PowerShot G15 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 SL1	Y	mono / mono	Y	-	mini	2.0	-	-	-
2.		Canon G15	Y	stereo / mono	-	-	mini	2.0	-	-	-
3.		Canon G12	Y	stereo / mono	-	-	mini	2.0	-	-	-
4.		Canon G16	Y	stereo / mono	-	-	mini	2.0	Y	-	-
5.		Canon M	Y	stereo / mono	Y	-	mini	2.0	-	-	-
6.		Canon M10	-	stereo / mono	-	-	mini	2.0	Y	Y	-
7.		Canon SL2	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
8.		Canon SX50	Y	stereo / mono	-	-	mini	2.0	-	-	-
9.		Canon T3i	Y	mono / mono	Y	-	mini	2.0	-	-	-
10.		Canon T4i	Y	stereo / mono	Y	-	mini	2.0	-	-	-
11.		Canon T5	Y	mono / mono	-	-	mini	2.0	-	-	-
12.		Canon T5i	Y	stereo / mono	Y	-	mini	2.0	-	-	-
13.		Canon T6	Y	mono / mono	-	-	mini	2.0	Y	Y	-
14.		Canon T100	Y	mono / mono	-	-	mini	2.0	Y	Y	-
15.		Fujifilm X10	Y	stereo / mono	-	-	mini	2.0	-	-	-
16.		Panasonic LX7	Y	stereo / mono	-	-	mini	2.0	-	-	-

It is notable that the SL1 has a microphone port, which is missing on the G15. Such an external microphone input can help to substantially improve the quality of audio recordings when a good external microphone is used.

Both the SL1 and the G15 have been discontinued, but can regularly be found used on ebay. The G15 was replaced by the Canon G16, while the SL1 was followed by the Canon SL2. Further information on the features and operation of the SL1 and G15 can be found, respectively, in the Canon SL1 Manual (free pdf) or the online Canon G15 Manual.

Review summary

So what is the bottom line? Which of the two cameras – the Canon SL1 or the Canon G15 – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.

Advantages of the Canon EOS Rebel SL1:

• More detail: Offers more megapixels (17.9 vs 12MP) with a 25% higher linear resolution.
• Better image quality: Scores substantially higher (17 points) in the DXO overall assessment.
• Richer colors: Generates images with noticeably better colors (1.9 bits more color depth).
• Better low-light sensitivity: Requires less light for good images (2.4 stops ISO advantage).
• Better video: Provides higher movie framerates (1080/30p versus 1080/24p).
• Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
• Better sound: Can connect to an external microphone for higher quality sound recording.
• More detailed LCD: Has a higher resolution rear screen (1040k vs 922k dots).
• Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
• Faster burst: Shoots at higher frequency (4.9 vs 2.1 flaps/sec) to capture the decisive moment.
• More flexible: Can take a variety of interchangeable lenses, including specialty optics.
• Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
• More modern: Is somewhat more recent (announced 6 months after the G15).

Reasons to prefer the Canon PowerShot G15:

• Ready to shoot: Comes with an integrated lens, while the SL1 requires a separate lens.
• More compact: Is smaller (107x76mm vs 117x91mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight even though it has a lens built in (unlike the SL1).
• Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
• More affordable: Was introduced at a lower price, despite coming with a built-in lens.
• More heavily discounted: Has been on the market for longer (launched in September 2012).

If the count of individual advantages (bullet points above) is taken as a guide, the SL1 is the clear winner of the match-up (13 : 6 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 sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape 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 SL1 and the Canon G15 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 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 SL1 or the G15. 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 expert reviews 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 (USD)	Street Price
1.		Canon SL1	4/5	+	..	78/100	4/5	4/5	Mar 2013	549	ebay.com
2.		Canon G15	4/5	+	..	76/100	4.5/5	4.5/5	Sep 2012	499	ebay.com
3.		Canon G12	4/5	+	..	73/100	4.5/5	4.5/5	Sep 2010	499	ebay.com
4.		Canon G16	4/5	+	..	..	4.5/5	4.5/5	Aug 2013	549	ebay.com
5.		Canon M	3/5	+	..	..	4/5	4/5	Jul 2012	599	ebay.com
6.		Canon M10	..	..	..	..	..	4/5	Oct 2015	499	ebay.com
7.		Canon SL2	4/5	+ +	4/5	78/100	4.5/5	4.5/5	Jun 2017	549	ebay.com
8.		Canon SX50	3/5	+ +	..	72/100	4.5/5	4.5/5	Sep 2012	429	ebay.com
9.		Canon T3i	3/5	o	..	77/100	4.5/5	4.5/5	Feb 2011	599	ebay.com
10.		Canon T4i	4/5	+ +	..	77/100	4.5/5	4.5/5	Jun 2012	849	ebay.com
11.		Canon T5	3/5	+	..	..	4/5	4.5/5	Feb 2014	449	ebay.com
12.		Canon T5i	..	..	..	76/100	4.5/5	4.5/5	Mar 2013	649	ebay.com
13.		Canon T6	4/5	o	4/5	73/100	4/5	4/5	Mar 2016	449	ebay.com
14.		Canon T100	..	o	3/5	..	3.5/5	3.5/5	Feb 2018	399	amazon.com
15.		Fujifilm X10	..	..	..	76/100	4/5	4.5/5	Sep 2011	599	ebay.com
16.		Panasonic LX7	3/5	+ +	..	75/100	4/5	4.5/5	Jul 2012	499	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

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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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