Canon T3i vs T6s

The Canon EOS Rebel T3i (called Canon 600D in some regions) and the Canon EOS Rebel T6s (labelled Canon 760D in some countries) are two digital cameras that were officially introduced, respectively, in February 2011 and February 2015. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The T3i has a resolution of 17.9 megapixels, whereas the T6s provides 24 MP.

As their names suggest, both the Canon EOS Rebel T3i and the Canon EOS Rebel T6s belong to Canon's Rebel line of DSLR cameras. This range of APS-C cameras, which started out with the Canon EOS Digital Rebel in 2003, has been a big commercial success and the backbone of Canon's dominance in the digital camera market. The popularity of the Rebel cameras is the result of them inheriting much of the sensor and shooting technology from earlier released professional DSLRs, while being sold at a much more budget-friendly price point. The strong brand reputation of Canon and the comprehensive EOS system of compatible lenses and accessories further contributes to the appeal of the Rebel cams, including the Canon T3i and Canon T6s. Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications

Canon T3i		Canon T6s
Digital single lens reflex		Digital single lens reflex
Canon EF mount lenses		Canon EF mount lenses
17.9 MP – APS-C sensor		24 MP – APS-C sensor
1080/30p Video		1080/30p Video
ISO 100-6,400 (100 - 12,800)		ISO 100-12,800 (100 - 25,600)
Optical viewfinder		Optical viewfinder
3.0" LCD – 1040k dots		3.0" LCD – 1040k dots
Swivel screen (not touch-sensitive)		Swivel touchscreen
3.7 shutter flaps per second		5 shutter flaps per second
440 shots per battery charge		440 shots per battery charge
133 x 100 x 80 mm, 570 g		132 x 101 x 78 mm, 565 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS Rebel T3i and the Canon EOS Rebel T6s? 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 T3i and the Canon T6s. 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 width, height and depth measures 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 T3i and the Canon T6s are of equal size. However, the T6s is slightly lighter (1 percent) than the T3i. In this context, it is worth noting that neither the T3i nor the T6s 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. In this particular case, both cameras feature the same lens mount, so that they can use the same lenses. You can compare the optics available in the Canon EF Lens Catalog.

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 T3i	133 mm	100 mm	80 mm	570 g	440	n	Feb 2011	599	ebay.com
2.		Canon T6s	132 mm	101 mm	78 mm	565 g	440	n	Feb 2015	649	ebay.com
3.		Canon 77D	131 mm	100 mm	76 mm	540 g	600	n	Feb 2017	899	ebay.com
4.		Canon T7i	131 mm	100 mm	76 mm	532 g	600	n	Feb 2017	749	ebay.com
5.		Canon T6	129 mm	101 mm	78 mm	485 g	500	n	Mar 2016	449	ebay.com
6.		Canon T6i	132 mm	101 mm	78 mm	555 g	440	n	Feb 2015	749	ebay.com
7.		Canon T5	130 mm	100 mm	78 mm	480 g	500	n	Feb 2014	449	ebay.com
8.		Canon SL1	117 mm	91 mm	69 mm	407 g	380	n	Mar 2013	549	ebay.com
9.		Canon T5i	133 mm	100 mm	79 mm	580 g	440	n	Mar 2013	649	ebay.com
10.		Canon M	109 mm	66 mm	32 mm	298 g	230	n	Jul 2012	599	ebay.com
11.		Canon T4i	133 mm	100 mm	79 mm	575 g	440	n	Jun 2012	849	ebay.com
12.		Canon T3	130 mm	100 mm	78 mm	495 g	700	n	Feb 2011	449	ebay.com
13.		Canon T2i	129 mm	98 mm	62 mm	530 g	440	n	Feb 2010	699	ebay.com
14.		Canon T1i	129 mm	98 mm	62 mm	520 g	400	n	Mar 2009	799	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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The T3i was somewhat cheaper (by 8 percent) than the T6s at launch, but both cameras fall into the same price category. 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 more expensive and lead to bigger and heavier cameras and lenses.

Both cameras under consideration feature an APS-C sensor and have a format factor (sometimes also referred to as "crop factor") of 1.6. Within the spectrum of camera sensors, this places the review cameras among the medium-sized sensor cameras that aim to strike a balance between image quality and portability. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Technology-wise, the T6s uses a more advanced image processing engine (DIGIC 6) than the T3i (DIGIC 4), with benefits for noise reduction, color accuracy, and processing speed.

While the two cameras under review share the same sensor size, the T6s offers a higher resolution of 24 megapixels, compared with 17.9 MP of the T3i. This megapixels advantage translates into a 16 percent gain in linear resolution. On the other hand, these sensor specs imply that the T6s has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.72μm versus 4.31μm for the T3i). However, it should be noted that the T6s is much more recent (by 4 years) than the T3i, and its sensor will have benefitted from technological advances during this time that compensate for the smaller pixel size.

The resolution advantage of the Canon T6s implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the T6s 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 Canon T3i are 25.9 x 17.3 inches or 65.8 x 43.9 cm for good quality, 20.7 x 13.8 inches or 52.7 x 35.1 cm for very good quality, and 17.3 x 11.5 inches or 43.9 x 29.3 cm for excellent quality prints.

The T6s has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Canon EOS Rebel T3i 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 EOS Rebel T6s are ISO 100 to ISO 12800, with the possibility to increase the ISO range to 100-25600.

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 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 T6s has a markedly higher DXO score than the T3i (overall score 5 points higher), which will translate into better image quality. The advantage is based on 0.5 bits higher color depth, 0.5 EV in additional dynamic range, and 0.2 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 T3i	APS-C	17.9	5184	3456	1080/30p	22.1	11.5	793	65
2.		Canon T6s	APS-C	24.0	6000	4000	1080/30p	22.6	12.0	915	70
3.		Canon 77D	APS-C	24.0	6000	4000	1080/60p	23.6	13.3	971	78
4.		Canon T7i	APS-C	24.0	6000	4000	1080/60p	23.7	13.1	1586	80
5.		Canon T6	APS-C	17.9	5184	3456	1080/30p	22.0	11.7	781	66
6.		Canon T6i	APS-C	24.0	6000	4000	1080/30p	22.7	12.0	919	71
7.		Canon T5	APS-C	17.9	5184	3456	1080/30p	21.9	11.3	724	63
8.		Canon SL1	APS-C	17.9	5184	3456	1080/30p	21.8	11.3	843	63
9.		Canon T5i	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	681	61
10.		Canon M	APS-C	17.9	5184	3456	1080/30p	22.1	11.2	827	65
11.		Canon T4i	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	722	62
12.		Canon T3	APS-C	12.2	4272	2848	720/30p	21.9	11.0	755	62
13.		Canon T2i	APS-C	17.9	5184	3456	1080/30p	22.1	11.5	784	66
14.		Canon T1i	APS-C	15.1	4752	3168	1080/20p	21.7	11.5	663	63
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. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, and both provide the same movie specifications (1080/30p).

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The T3i and the T6s 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 viewfinders of both cameras offer the same field of view (95%), but the viewfinder of the T3i has a higher magnification than the one of the T6s (0.53x vs 0.51x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Canon T3i, the Canon T6s, 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 T3i	optical	n	3.0 / 1040	swivel	n	1/4000s	3.7/s	Y	n
2.		Canon T6s	optical	Y	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
3.		Canon 77D	optical	Y	3.0 / 1040	swivel	Y	1/4000s	6.0/s	Y	n
4.		Canon T7i	optical	n	3.0 / 1040	swivel	Y	1/4000s	6.0/s	Y	n
5.		Canon T6	optical	n	3.0 / 920	fixed	n	1/4000s	3.0/s	Y	n
6.		Canon T6i	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
7.		Canon T5	optical	n	3.0 / 460	fixed	n	1/4000s	3.0/s	Y	n
8.		Canon SL1	optical	n	3.0 / 1040	fixed	Y	1/4000s	4.9/s	Y	n
9.		Canon T5i	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
10.		Canon M	none	n	3.0 / 1040	fixed	Y	1/4000s	4.3/s	n	n
11.		Canon T4i	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
12.		Canon T3	optical	n	2.7 / 230	fixed	n	1/4000s	3.0/s	Y	n
13.		Canon T2i	optical	n	3.0 / 1040	fixed	n	1/4000s	3.7/s	Y	n
14.		Canon T1i	optical	n	3.0 / 920	fixed	n	1/4000s	3.4/s	Y	n
Notes: *) 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 T6s has a touchscreen, while the T3i 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 T3i and the T6s write their files to SDXC cards. The T6s supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the T3i 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 T3i and Canon EOS Rebel T6s 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 T3i	Y	mono / mono	Y	-	mini	2.0	-	-	-
2.		Canon T6s	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
3.		Canon 77D	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
4.		Canon T7i	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
5.		Canon T6	Y	mono / mono	-	-	mini	2.0	Y	Y	-
6.		Canon T6i	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
7.		Canon T5	Y	mono / mono	-	-	mini	2.0	-	-	-
8.		Canon SL1	Y	mono / mono	Y	-	mini	2.0	-	-	-
9.		Canon T5i	Y	stereo / mono	Y	-	mini	2.0	-	-	-
10.		Canon M	Y	stereo / mono	Y	-	mini	2.0	-	-	-
11.		Canon T4i	Y	stereo / mono	Y	-	mini	2.0	-	-	-
12.		Canon T3	Y	stereo / mono	-	-	mini	2.0	-	-	-
13.		Canon T2i	Y	stereo / -	Y	-	mini	2.0	-	-	-
14.		Canon T1i	Y	mono / mono	-	-	mini	2.0	-	-	-

It is notable that the T6s offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the T3i does not provide wifi capability.

Both the T3i and the T6s have been discontinued, but can regularly be found used on ebay. The T3i was replaced by the Canon T4i, while the T6s was followed by the Canon 77D. Further information on the features and operation of the T3i and T6s can be found, respectively, in the Canon T3i Manual (free pdf) or the online Canon T6s Manual.

Review summary

So how do things add up? Which of the two cameras – the Canon T3i or the Canon T6s – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.

Reasons to prefer the Canon EOS Rebel T3i:

• Larger viewfinder image: Features a viewfinder with a higher magnification (0.53x vs 0.51x).
• More heavily discounted: Has been available for much longer (launched in February 2011).

Arguments in favor of the Canon EOS Rebel T6s:

• More detail: Has more megapixels (24 vs 17.9MP), which boosts linear resolution by 16%.
• Better image quality: Scores markedly higher (5 points) in the DXO overall evaluation.
• Better jpgs: Has a more modern image processing engine (DIGIC 6 vs DIGIC 4).
• Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
• Easier setting verification: Features a control panel on top to check shooting parameters.
• Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
• Faster burst: Shoots at higher frequency (5 vs 3.7 flaps/sec) to capture the decisive moment.
• 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.
• Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
• More modern: Reflects 4 years of technical progress since the T3i launch.

If the count of individual advantages (bullet points above) is taken as a guide, the T6s is the clear winner of the contest (11 : 2 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. 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 T3i and the Canon T6s place the cameras among the top in their class? Find out in the latest Best DSLR Camera listing 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 T3i and the T6s 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 where reviews by experts come in. 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 T3i	3/5	o	..	77/100	4.5/5	4.5/5	Feb 2011	599	ebay.com
2.		Canon T6s	5/5	+	..	77/100	4.5/5	4.5/5	Feb 2015	649	ebay.com
3.		Canon 77D	4.5/5	..	4/5	82/100	4.5/5	4/5	Feb 2017	899	ebay.com
4.		Canon T7i	4.5/5	..	3.5/5	80/100	4.5/5	4/5	Feb 2017	749	ebay.com
5.		Canon T6	4/5	o	4/5	73/100	4/5	4/5	Mar 2016	449	ebay.com
6.		Canon T6i	5/5	..	..	75/100	4.5/5	4.5/5	Feb 2015	749	ebay.com
7.		Canon T5	3/5	+	..	..	4/5	4.5/5	Feb 2014	449	ebay.com
8.		Canon SL1	4/5	+	..	78/100	4/5	4/5	Mar 2013	549	ebay.com
9.		Canon T5i	..	..	..	76/100	4.5/5	4.5/5	Mar 2013	649	ebay.com
10.		Canon M	3/5	+	..	..	4/5	4/5	Jul 2012	599	ebay.com
11.		Canon T4i	4/5	+ +	..	77/100	4.5/5	4.5/5	Jun 2012	849	ebay.com
12.		Canon T3	..	80/100	..	69/100	4/5	4.5/5	Feb 2011	449	ebay.com
13.		Canon T2i	..	+ +	..	77/100	4/5	4.5/5	Feb 2010	699	ebay.com
14.		Canon T1i	..	+ +	..	74/100	4.5/5	4.5/5	Mar 2009	799	ebay.com
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated 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. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and comparisons of ratings among very different cameras or across long time periods 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? 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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