Canon SL1 vs SX40

The Canon EOS Rebel SL1 (called Canon 100D in some regions) and the Canon PowerShot SX40 HS are two digital cameras that were announced, respectively, in March 2013 and September 2011. The SL1 is a DSLR, while the SX40 is a fixed lens compact. The cameras are based on an APS-C (SL1) and a 1/2.3-inch (SX40) sensor. The SL1 has a resolution of 17.9 megapixels, whereas the SX40 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 SX40
Digital single lens reflex		Fixed lens compact camera
Canon EF mount lenses		24-840mm f/2.7-5.8
17.9 MP – APS-C sensor		12 MP – 1/2.3" sensor
1080/30p Video		1080/24p Video
ISO 100-12,800 (100 - 25,600)		ISO 100-3,200
Optical viewfinder		Electronic viewfinder (202k dots)
3.0" LCD – 1040k dots		2.7" LCD – 230k dots
Fixed touchscreen		Swivel screen (not touch-sensitive)
4.9 shutter flaps per second		10.3 shutter flaps per second
380 shots per battery charge		380 shots per battery charge
117 x 91 x 69 mm, 407 g		123 x 92 x 108 mm, 600 g

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Check SX40 offers at
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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 SX40 HS? 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 SX40 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 measures are rounded to the nearest millimeter.

The SL1 can be obtained in two different colors (black, white), while the SX40 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 SX40 is notably larger (6 percent) than the Canon SL1. In this context, it is worth noting that neither the SL1 nor the SX40 are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the SX40 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.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

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 SX40	123 mm	92 mm	108 mm	600 g	380	n	Sep 2011	429	ebay.com
3.		Canon G16	109 mm	76 mm	40 mm	356 g	360	n	Aug 2013	549	ebay.com
4.		Canon M	109 mm	66 mm	32 mm	298 g	230	n	Jul 2012	599	ebay.com
5.		Canon M10	108 mm	67 mm	35 mm	301 g	255	n	Oct 2015	499	ebay.com
6.		Canon SL2	122 mm	93 mm	70 mm	453 g	650	n	Jun 2017	549	ebay.com
7.		Canon SX20	123 mm	88 mm	87 mm	600 g	..	n	Aug 2009	399	ebay.com
8.		Canon SX30	123 mm	92 mm	108 mm	601 g	370	n	Sep 2010	429	ebay.com
9.		Canon SX50	123 mm	87 mm	106 mm	595 g	315	n	Sep 2012	429	ebay.com
10.		Canon T3i	133 mm	100 mm	80 mm	570 g	440	n	Feb 2011	599	ebay.com
11.		Canon T4i	133 mm	100 mm	79 mm	575 g	440	n	Jun 2012	849	ebay.com
12.		Canon T5	130 mm	100 mm	78 mm	480 g	500	n	Feb 2014	449	ebay.com
13.		Canon T5i	133 mm	100 mm	79 mm	580 g	440	n	Mar 2013	649	ebay.com
14.		Canon T6	129 mm	101 mm	78 mm	485 g	500	n	Mar 2016	449	ebay.com
15.		Canon T100	129 mm	102 mm	77 mm	436 g	500	n	Feb 2018	399	amazon.com
16.		Panasonic FZ100	124 mm	82 mm	92 mm	540 g	410	n	Jul 2010	499	ebay.com
17.		Panasonic FZ150	124 mm	82 mm	92 mm	528 g	410	n	Aug 2011	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 SX40 was launched at a lower price than the SL1, 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.

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. 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 associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Canon SL1 features an APS-C sensor and the Canon SX40 a 1/2.3-inch sensor. The sensor area in the SX40 is 92 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.6 and 5.6. The sensor in the SL1 has a native 3:2 aspect ratio, while the one in the SX40 offers a 4:3 aspect.

With 17.9MP, the SL1 offers a higher resolution than the SX40 (12MP), but the SL1 nevertheless has larger individual pixels (pixel pitch of 4.31μm versus 1.53μm for the SX40) due to its larger sensor. Moreover, the SL1 is a somewhat more recent model (by 1 year and 6 months) than the SX40, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels. Coming back to sensor resolution, it should be mentioned that the SX40 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

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 SX40 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 SX40 HS are ISO 100 to ISO 3200 (no boost).

In terms of underlying technology, the SL1 is build around a CMOS sensor, while the SX40 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.

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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. 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 SL1	APS-C	17.9	5184	3456	1080/30p	21.8	11.3	843	63
2.		Canon SX40	1/2.3	12.0	4000	3000	1080/24p	19.6	10.9	409	41
3.		Canon G16	1/1.7	12.0	4000	3000	1080/60p	21.0	11.7	230	54
4.		Canon M	APS-C	17.9	5184	3456	1080/30p	22.1	11.2	827	65
5.		Canon M10	APS-C	17.9	5184	3456	1080/30p	22.2	11.4	753	65
6.		Canon SL2	APS-C	24.0	6000	4000	1080/60p	23.6	13.4	1041	79
7.		Canon SX20	1/2.3	12.0	4000	3000	720/30p	19.2	10.5	225	37
8.		Canon SX30	1/2.3	14.0	4320	3240	720/30p	19.4	10.7	320	39
9.		Canon SX50	1/2.3	12.0	4000	3000	1080/24p	20.3	11.2	179	47
10.		Canon T3i	APS-C	17.9	5184	3456	1080/30p	22.1	11.5	793	65
11.		Canon T4i	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	722	62
12.		Canon T5	APS-C	17.9	5184	3456	1080/30p	21.9	11.3	724	63
13.		Canon T5i	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	681	61
14.		Canon T6	APS-C	17.9	5184	3456	1080/30p	22.0	11.7	781	66
15.		Canon T100	APS-C	17.9	5184	3456	1080/30p	21.9	11.4	695	63
16.		Panasonic FZ100	1/2.3	14.0	4320	3240	1080/60i	19.4	10.7	306	39
17.		Panasonic FZ150	1/2.3	12.0	4000	3000	1080/60p	19.4	10.9	132	40
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 also of capturing video footage. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the SL1 provides a higher frame rate than the SX40. It can shoot video footage at 1080/30p, while the SX40 is limited to 1080/24p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the SX40 has an electronic viewfinder (202k dots), while the SL1 has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The table below summarizes some of the other core capabilities of the Canon SL1 and Canon SX40 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 SX40	202	n	2.7 / 230	swivel	n	1/3200s	10.3/s	Y	Y
3.		Canon G16	optical	n	3.0 / 922	fixed	n	1/4000s	2.2/s	Y	Y
4.		Canon M	none	n	3.0 / 1040	fixed	Y	1/4000s	4.3/s	n	n
5.		Canon M10	none	n	3.0 / 1040	tilting	Y	1/4000s	4.6/s	Y	n
6.		Canon SL2	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
7.		Canon SX20	202	n	2.5 / 230	swivel	n	1/3200s	0.7/s	Y	Y
8.		Canon SX30	202	n	2.7 / 230	swivel	n	1/3200s	0.6/s	Y	Y
9.		Canon SX50	202	n	3.0 / 461	swivel	n	1/2000s	2.2/s	Y	Y
10.		Canon T3i	optical	n	3.0 / 1040	swivel	n	1/4000s	3.7/s	Y	n
11.		Canon T4i	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
12.		Canon T5	optical	n	3.0 / 460	fixed	n	1/4000s	3.0/s	Y	n
13.		Canon T5i	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
14.		Canon T6	optical	n	3.0 / 920	fixed	n	1/4000s	3.0/s	Y	n
15.		Canon T100	optical	n	2.7 / 230	fixed	n	1/4000s	3.0/s	Y	n
16.		Panasonic FZ100	202	n	3.0 / 460	swivel	n	1/2000s	11.0/s	Y	Y
17.		Panasonic FZ150	202	n	3.0 / 460	swivel	n	1/2000s	12.0/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 SX40 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 SX40 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 SX40 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 SX40 HS 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 SX40	Y	stereo / mono	-	-	YES	2.0	-	-	-
3.		Canon G16	Y	stereo / mono	-	-	mini	2.0	Y	-	-
4.		Canon M	Y	stereo / mono	Y	-	mini	2.0	-	-	-
5.		Canon M10	-	stereo / mono	-	-	mini	2.0	Y	Y	-
6.		Canon SL2	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
7.		Canon SX20	Y	stereo / mono	-	-	YES	2.0	-	-	-
8.		Canon SX30	Y	stereo / mono	-	-	YES	2.0	-	-	-
9.		Canon SX50	Y	stereo / mono	-	-	mini	2.0	-	-	-
10.		Canon T3i	Y	mono / mono	Y	-	mini	2.0	-	-	-
11.		Canon T4i	Y	stereo / mono	Y	-	mini	2.0	-	-	-
12.		Canon T5	Y	mono / mono	-	-	mini	2.0	-	-	-
13.		Canon T5i	Y	stereo / mono	Y	-	mini	2.0	-	-	-
14.		Canon T6	Y	mono / mono	-	-	mini	2.0	Y	Y	-
15.		Canon T100	Y	mono / mono	-	-	mini	2.0	Y	Y	-
16.		Panasonic FZ100	Y	stereo / mono	-	-	mini	2.0	-	-	-
17.		Panasonic FZ150	Y	stereo / -	-	-	mini	2.0	-	-	-

It is notable that the SL1 has a microphone port, which is missing on the SX40. 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 SX40 have been discontinued, but can regularly be found used on ebay. The SX40 was replaced by the Canon SX50, while the SL1 was followed by the Canon SL2. Further information on the features and operation of the SL1 and SX40 can be found, respectively, in the Canon SL1 Manual (free pdf) or the online Canon SX40 Manual.

Review summary

So what conclusions can be drawn? Is the Canon SL1 better than the Canon SX40 or vice versa? The listing below highlights the relative strengths of the two models.

Reasons to prefer the Canon EOS Rebel SL1:

• More detail: Offers more megapixels (17.9 vs 12MP) with a 25% higher linear resolution.
• Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
• 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.
• 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.
• Brighter framing: Features an optical viewfinder for clear, lag-free composition.
• Larger screen: Has a bigger rear LCD (3.0" vs 2.7") for image review and settings control.
• More detailed LCD: Has a higher resolution rear screen (1040k vs 230k dots).
• Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
• Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/3200s) to freeze action.
• 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 1 year and 6 months after the SX40).

Advantages of the Canon PowerShot SX40 HS:

• Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
• More framing info: Has an electronic viewfinder that displays shooting data.
• More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
• Faster burst: Shoots at higher frequency (10.3 vs 4.9 flaps/sec) to capture the decisive moment.
• Ready to shoot: Comes with an integrated lens, while the SL1 requires a separate lens.
• 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 2011).

If the count of individual advantages (bullet points above) is taken as a guide, the SL1 is the clear winner of the match-up (17 : 8 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 SL1 and the Canon SX40 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Superzoom 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 partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the SL1 or the SX40. 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 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 SL1	4/5	+	..	78/100	4/5	4/5	Mar 2013	549	ebay.com
2.		Canon SX40	..	+	..	..	4.5/5	4/5	Sep 2011	429	ebay.com
3.		Canon G16	4/5	+	..	..	4.5/5	4.5/5	Aug 2013	549	ebay.com
4.		Canon M	3/5	+	..	..	4/5	4/5	Jul 2012	599	ebay.com
5.		Canon M10	..	..	..	..	..	4/5	Oct 2015	499	ebay.com
6.		Canon SL2	4/5	+ +	4/5	78/100	4.5/5	4.5/5	Jun 2017	549	ebay.com
7.		Canon SX20	..	+ +	..	73/100	..	4/5	Aug 2009	399	ebay.com
8.		Canon SX30	3/5	+ +	..	..	3.5/5	4/5	Sep 2010	429	ebay.com
9.		Canon SX50	3/5	+ +	..	72/100	4.5/5	4.5/5	Sep 2012	429	ebay.com
10.		Canon T3i	3/5	o	..	77/100	4.5/5	4.5/5	Feb 2011	599	ebay.com
11.		Canon T4i	4/5	+ +	..	77/100	4.5/5	4.5/5	Jun 2012	849	ebay.com
12.		Canon T5	3/5	+	..	..	4/5	4.5/5	Feb 2014	449	ebay.com
13.		Canon T5i	..	..	..	76/100	4.5/5	4.5/5	Mar 2013	649	ebay.com
14.		Canon T6	4/5	o	4/5	73/100	4/5	4/5	Mar 2016	449	ebay.com
15.		Canon T100	..	o	3/5	..	3.5/5	3.5/5	Feb 2018	399	amazon.com
16.		Panasonic FZ100	..	+	..	..	4.5/5	4.5/5	Jul 2010	499	ebay.com
17.		Panasonic FZ150	3/5	+ +	..	76/100	4/5	4.5/5	Aug 2011	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. Hence, a score should always be seen in the context of the camera's market launch date and its price, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. 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

Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes below. 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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