Canon Rebel vs T3i

The Canon EOS Digital Rebel (called Canon 300D in some regions) and the Canon EOS Rebel T3i (labelled Canon 600D in some countries) are two digital cameras that were officially introduced, respectively, in August 2003 and February 2011. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The Rebel has a resolution of 6.3 megapixels, whereas the T3i provides 17.9 MP.

As their names suggest, both the Canon EOS Digital Rebel and the Canon EOS Rebel T3i 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 Rebel and Canon T3i. Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications

Canon Rebel		Canon T3i
Digital single lens reflex		Digital single lens reflex
Canon EF mount lenses		Canon EF mount lenses
6.3 MP – APS-C sensor		17.9 MP – APS-C sensor
no Video		1080/30p Video
ISO 100-1,600		ISO 100-6,400 (100 - 12,800)
Optical viewfinder		Optical viewfinder
1.8" LCD – 118k dots		3.0" LCD – 1040k dots
Fixed screen (not touch-sensitive)		Swivel screen (not touch-sensitive)
2.5 shutter flaps per second		3.7 shutter flaps per second
400 shots per battery charge		440 shots per battery charge
142 x 99 x 72 mm, 649 g		133 x 100 x 80 mm, 570 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS Digital Rebel and the Canon EOS Rebel T3i? 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 Rebel and the Canon T3i. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear 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 Canon T3i is notably smaller (5 percent) than the Canon Rebel. Moreover, the T3i is markedly lighter (12 percent) than the Rebel. In this context, it is worth noting that neither the Rebel nor the T3i 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.

Concerning battery life, the Rebel gets 400 shots out of its Canon BP-511 battery, while the T3i can take 440 images on a single charge of its Canon LP-E8 power pack.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

Body Specifications

		Camera Model	Camera Width	Camera Height	Camera Depth	Camera Weight	Battery Life	Weather Sealing	Camera Launch	Launch Price	Street Price
1.		Canon Rebel	142 mm	99 mm	72 mm	649 g	400	n	Aug 2003	US$ 899	ebay.com
2.		Canon T3i	133 mm	100 mm	80 mm	570 g	440	n	Feb 2011	US$ 599	ebay.com
3.		Canon 10D	150 mm	107 mm	75 mm	850 g	500	n	Feb 2003	US$ 1 999	ebay.com
4.		Canon 20D	144 mm	106 mm	72 mm	770 g	700	n	Aug 2004	US$ 1 499	ebay.com
5.		Canon T1i	129 mm	98 mm	62 mm	520 g	400	n	Mar 2009	US$ 799	ebay.com
6.		Canon T2i	129 mm	98 mm	62 mm	530 g	440	n	Feb 2010	US$ 699	ebay.com
7.		Canon T4i	133 mm	100 mm	79 mm	575 g	440	n	Jun 2012	US$ 849	ebay.com
8.		Canon T5i	133 mm	100 mm	79 mm	580 g	440	n	Mar 2013	US$ 649	ebay.com
9.		Canon T6	129 mm	101 mm	78 mm	485 g	500	n	Mar 2016	US$ 449	ebay.com
10.		Canon T6s	132 mm	101 mm	78 mm	565 g	440	n	Feb 2015	US$ 649	ebay.com
11.		Canon T7i	131 mm	100 mm	76 mm	532 g	600	n	Feb 2017	US$ 749	ebay.com
12.		Canon XT	127 mm	94 mm	64 mm	540 g	400	n	Feb 2005	US$ 899	ebay.com
13.		Canon XTi	127 mm	84 mm	65 mm	556 g	370	n	Aug 2006	US$ 799	ebay.com
14.		Nikon D70	140 mm	111 mm	78 mm	679 g	400	n	Jan 2004	US$ 999	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 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 T3i was launched at a markedly lower price (by 33 percent) than the Rebel, which puts it into a different market segment. 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 size of the sensor inside a digital camera is one of the key determinants 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. 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.

Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the T3i is 3 percent smaller. They nevertheless have the same format factor of 1.6. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Despite having a slightly smaller sensor, the T3i offers a higher resolution of 17.9 megapixels, compared with 6.3 MP of the Rebel. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 4.31μm versus 7.38μm for the Rebel). However, it should be noted that the T3i is much more recent (by 7 years and 5 months) than the Rebel, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.

The resolution advantage of the Canon T3i implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the T3i 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 Rebel are 15.4 x 10.2 inches or 39 x 26 cm for good quality, 12.3 x 8.2 inches or 31.2 x 20.8 cm for very good quality, and 10.2 x 6.8 inches or 26 x 17.3 cm for excellent quality prints.

The Canon EOS Digital Rebel has a native sensitivity range from ISO 100 to ISO 1600. The corresponding ISO settings for the Canon EOS Rebel T3i are ISO 100 to ISO 6400, with the possibility to increase the ISO range to 100-12800.

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 consideration, the T3i has a markedly higher DXO score than the Rebel (overall score 10 points higher), which will translate into better image quality. The advantage is based on 1.1 bits higher color depth, 0.7 EV in additional dynamic range, and 0.5 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 Rebel	APS-C	6.3	3072	2048	none	21.0	10.8	544	55
2.		Canon T3i	APS-C	17.9	5184	3456	1080/30p	22.1	11.5	793	65
3.		Canon 10D	APS-C	6.3	3072	2048	none	21.1	10.9	571	57
4.		Canon 20D	APS-C	8.2	3504	2336	none	21.9	11.0	721	62
5.		Canon T1i	APS-C	15.1	4752	3168	1080/20p	21.7	11.5	663	63
6.		Canon T2i	APS-C	17.9	5184	3456	1080/30p	22.1	11.5	784	66
7.		Canon T4i	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	722	62
8.		Canon T5i	APS-C	17.9	5184	3456	1080/30p	21.7	11.2	681	61
9.		Canon T6	APS-C	17.9	5184	3456	1080/30p	22.0	11.7	781	66
10.		Canon T6s	APS-C	24.0	6000	4000	1080/30p	22.6	12.0	915	70
11.		Canon T7i	APS-C	24.0	6000	4000	1080/60p	23.7	13.1	1586	80
12.		Canon XT	APS-C	8.0	3456	2304	none	21.8	10.8	637	60
13.		Canon XTi	APS-C	10.1	3888	2592	none	22.1	11.0	664	62
14.		Nikon D70	APS-C	6.0	3008	2000	none	20.4	10.3	529	50
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 T3i indeed provides for movie recording, while the Rebel does not. The highest resolution format that the T3i can use is 1080/30p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The Rebel and the T3i 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 Rebel has a higher magnification than the one of the T3i (0.55x vs 0.53x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Canon Rebel and Canon T3i along with similar information for a selection of comparators.

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 Rebel	optical	n	1.8 / 118	fixed	n	1/4000s	2.5/s	Y	n
2.		Canon T3i	optical	n	3.0 / 1040	swivel	n	1/4000s	3.7/s	Y	n
3.		Canon 10D	optical	Y	1.8 / 118	fixed	n	1/4000s	3.0/s	Y	n
4.		Canon 20D	optical	Y	1.8 / 118	fixed	n	1/8000s	5.0/s	Y	n
5.		Canon T1i	optical	n	3.0 / 920	fixed	n	1/4000s	3.4/s	Y	n
6.		Canon T2i	optical	n	3.0 / 1040	fixed	n	1/4000s	3.7/s	Y	n
7.		Canon T4i	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
8.		Canon T5i	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
9.		Canon T6	optical	n	3.0 / 920	fixed	n	1/4000s	3.0/s	Y	n
10.		Canon T6s	optical	Y	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
11.		Canon T7i	optical	n	3.0 / 1040	swivel	Y	1/4000s	6.0/s	Y	n
12.		Canon XT	optical	n	1.8 / 115	fixed	n	1/4000s	3.0/s	Y	n
13.		Canon XTi	optical	n	2.5 / 230	fixed	n	1/4000s	3.0/s	Y	n
14.		Nikon D70	optical	n	1.8 / 130	fixed	n	1/8000s	3.0/s	Y	n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

The Rebel writes its imaging data to Compact Flash cards, while the T3i uses SDXC 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 Digital Rebel and Canon EOS Rebel T3i 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 Rebel	Y	- / -	-	-	-	1.1	-	-	-
2.		Canon T3i	Y	mono / mono	Y	-	mini	2.0	-	-	-
3.		Canon 10D	Y	- / -	-	-	-	1.1	-	-	-
4.		Canon 20D	Y	- / -	-	-	-	1.1	-	-	-
5.		Canon T1i	Y	mono / mono	-	-	mini	2.0	-	-	-
6.		Canon T2i	Y	stereo / -	Y	-	mini	2.0	-	-	-
7.		Canon T4i	Y	stereo / mono	Y	-	mini	2.0	-	-	-
8.		Canon T5i	Y	stereo / mono	Y	-	mini	2.0	-	-	-
9.		Canon T6	Y	mono / mono	-	-	mini	2.0	Y	Y	-
10.		Canon T6s	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
11.		Canon T7i	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
12.		Canon XT	Y	- / -	-	-	-	2.0	-	-	-
13.		Canon XTi	Y	- / -	-	-	-	2.0	-	-	-
14.		Nikon D70	Y	- / -	-	-	-	1.0	-	-	-

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

Review summary

So what conclusions can be drawn? Is there a clear favorite between the Canon Rebel and the Canon T3i? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.

Advantages of the Canon EOS Digital Rebel:

• Larger viewfinder image: Features a viewfinder with a higher magnification (0.55x vs 0.53x).
• More heavily discounted: Has been available for much longer (launched in August 2003).

Arguments in favor of the Canon EOS Rebel T3i:

• More detail: Has more megapixels (17.9 vs 6.3MP), which boosts linear resolution by 69%.
• Better image quality: Scores markedly higher (10 points) in the DXO overall evaluation.
• Richer colors: Generates noticeably more natural colors (1.1 bits more color depth).
• More dynamic range: Captures a broader range of light and dark details (0.7 EV of extra DR).
• Better low-light sensitivity: Can shoot in dim conditions (0.5 stops ISO advantage).
• Broader imaging potential: Can capture not only stills but also 1080/30p video.
• Larger screen: Has a bigger rear LCD (3.0" vs 1.8") for image review and settings control.
• More detailed LCD: Has a higher resolution rear screen (1040k vs 118k dots).
• More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
• More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
• Faster burst: Shoots at higher frequency (3.7 vs 2.5 flaps/sec) to capture the decisive moment.
• Less heavy: Has a lower weight (by 79g or 12 percent) and is thus easier to take along.
• Faster data transfer: Supports a more advanced USB protocol (2.0 vs 1.1).
• More affordable: Was introduced into a lower priced category (33 percent cheaper at launch).
• More modern: Reflects 7 years and 5 months of technical progress since the Rebel launch.

If the number of relative strengths (bullet points above) is taken as a guide, the T3i is the clear winner of the contest (15 : 2 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 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 Rebel and the Canon T3i 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 remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the Rebel or the T3i. 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 where reviews by experts come in. The adjacent summary-table relays the overall verdicts of several of the most popular 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	Street Price
1.		Canon Rebel	..	..	..	+ +	..	..	Aug 2003	US$ 899	ebay.com
2.		Canon T3i	3/5	o	..	77/100	4.5/5	4.5/5	Feb 2011	US$ 599	ebay.com
3.		Canon 10D	..	..	..	+ +	..	..	Feb 2003	US$ 1 999	ebay.com
4.		Canon 20D	..	..	..	+ +	..	..	Aug 2004	US$ 1 499	ebay.com
5.		Canon T1i	..	+ +	..	74/100	4.5/5	4.5/5	Mar 2009	US$ 799	ebay.com
6.		Canon T2i	..	+ +	..	77/100	4/5	4.5/5	Feb 2010	US$ 699	ebay.com
7.		Canon T4i	4/5	+ +	..	77/100	4.5/5	4.5/5	Jun 2012	US$ 849	ebay.com
8.		Canon T5i	..	..	..	76/100	4.5/5	4.5/5	Mar 2013	US$ 649	ebay.com
9.		Canon T6	4/5	o	4/5	73/100	4/5	4/5	Mar 2016	US$ 449	ebay.com
10.		Canon T6s	5/5	+	..	77/100	4.5/5	4.5/5	Feb 2015	US$ 649	ebay.com
11.		Canon T7i	4.5/5	..	3.5/5	80/100	4.5/5	4/5	Feb 2017	US$ 749	ebay.com
12.		Canon XT	..	80/100	..	+ +	o	..	Feb 2005	US$ 899	ebay.com
13.		Canon XTi	..	+ +	..	+ +	o	4/5	Aug 2006	US$ 799	ebay.com
14.		Nikon D70	..	..	..	+ +	..	..	Jan 2004	US$ 999	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. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. 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 your choice using the following search menu. 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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