This is a Rebel T4i with a better 18-55 kit lens. It's intended as a drop-in replacement for the T4i, which means it's the same fast, compact stills camera with a touchscreen that simplifies configuration, image review, and the EOS learning curve. There are better movie cameras. Motion tracking for video, while a vast improvement over DSLRs before the T4i, falls short of many mirrorless bodies.
I'm reviewing it from the perspective of a working professional, which means I'm at least as concerned about what it's missing as what it has. If you're new to DSLRs, you're likely to find this camera an immense upgrade in many ways.
Buy it over mirrorless systems and the T2i/T3i if you want faster shooting and tracking with stills and the immediacy of an optical viewfinder. Choose the SL1 for the most petite size, the 60D for a quicker interface and a deeper buffer for raw files, or the 7D for even better motion-tracking. The T4i alone or with the 18-135 STM is equally compelling if it costs less. Image quality is the same between all the crop bodies. Low-light performance improves with the full-frame 6D and above.
9-point AF w/ 1 cross-point
11 raw burst
1/4000 max shutter
+ 18 MP
+ 3.7 fps
+ 1080p/30, 720p/60
+ Movie crop zoom, 7X VGA
+ LCD sharper
+ Metering improved
+ Auto-ISO improved
-- 6 raw burst
+ LCD articulates
+ Movie crop zoom, 3X 1080p
+ JPEG adjustments & scene modes
+ 9-point AF w/ 9 cross-points
+ Hybrid AF for video
+ 5 fps
+ Stereo mic
+ Multi-shot noise reduction
+ Automated 3-shot HDR
-- No movie crop zoom
+ 360-degree mode dial
+ JPEG effects in Live View
+ 18-55 kit zoom w/ STM focus
+ 5.3 fps
+ 16 raw burst
+ AF-on button
+ Top-panel LCD
+ Mode dial lock
+ Viewfinder bigger, brighter
+ 1/8000 max shutter
+ Battery life doubled
-- No touchscreen
-- No hybrid AF for video
-- No multi-shot noise reduction
-- No automated HDR
-- Mono mic
-- Non-STM 18-135 kit lens
All Rebels have three handling characteristics: small grips (for a DSLR), an emphasis on buttons over dials, and many functions intended to be used with the camera away from your face.
Those with petite hands may appreciate the small size. I prefer the larger grips of the 60D and above. There's not much practical difference in portability; the T5i, like the 60D, is too large for a pocket or most purses. It is lighter by a quarter, but if you're really sweating the ounces, a mirrorless system or the SL1 is a better choice.
Certain adjustments are less accessible than with the 60D and 7D. For lack of a thumb wheel, this Rebel requires more buttons held in combination to activate basic functions like exposure compensation. There's no top LCD, so a quick check of your settings or changing the white balance requires booting the rear screen. Likewise, there's no joystick or 8-way pad for direct AF point selection. The higher-tier cameras make it easier to rapidly correct settings without taking your eye from the viewfinder and missing the subject or the moment.
The counterpoint is that showing everything on the rear screen with touch control significantly lowers the EOS learning curve. The touchscreen is capacitive and almost as responsive as a modern smartphone. Adjusting functions (e.g., exposure, white balance, focus points; everything) is as simple as tapping what you want. The camera won't be at the ready when you're manipulating the LCD, but thanks in part to an integrated 'feature guide' that explains most options, you probably won't need to pull out the manual on first acquaintance.
Phone gestures (e.g., pinch zoom, swiping) are now part of the picture review system, which makes checking focus vastly quicker and more flexible than on any other non-touch EOS body. Focus itself is touch-enabled in Live View mode, so you can tap to focus on static subjects anywhere in the frame without ever having to manipulate the 9-point AF system.
There's no weather-sealing in the body or the kit lenses. Don't use either in the rain without a cover. You do get a popup flash, though for lack of direct diffusion or bounce, using it as a main light will lead to harsh, high-contrast results. The rear LCD swivels to the side almost parallel to the body and rotates a full 360 degrees, so you can easily frame self-portraits, or turn it in to face the body for protection in storage.
This sensor is functionally identical to those in the T2i/T3i/T4i/60D/7D/SL1. Noise and dynamic range are the same in raw, though noise in JPEG is a tick cleaner with the T4i and T5i. Expect acceptable results up to ISO 3200. Nikon's D5100 is slightly better, Sony's A65 slightly worse. It's about two solid stops better than a typical point-and-shoot.
Unless you're in a JPEG-only shooting mode (e.g., multi-shot NR, HDR), raw gets the most out of this camera. Post-production creates the bulk of the appeal of many photographs (e.g., Instagram) and JPEG often lacks the requisite flexibility. Raw shooting also lets you defer decisions (e.g., white balance, sharpening, noise reduction, color, distortion, tone curves, and even exposure) that distract from catching whatever moment you're after.
HDR combines 3 shots taken in rapid succession. The automated result preserves highlights in a subtle, natural way, but not with greatly more range than a raw file with Highlight Tone Priority enabled. If you want to do your own processing with a program like SNS-HDR, you'll be adjusting exposures manually because Auto Exposure Bracketing (AEB) is limited to 3 shots from -2EV to +2EV.
Multi-Shot NR combines 4 shots to create one with less noise. You can set your own starting ISO, but the effects aren't apparent until ISO 800. At high ISO, it's good for about 1.5 stops. If the camera's already on a tripod or you can lean on an IS lens, you might as well lower the ISO and shoot for longer. A limited auto-alignment feature applies to handheld sequences for this feature and the similar 'Handheld Night Scene' shooting mode.
This camera has the same phase-detect AF unit (9 points, all cross-type) and nearly the same framerate (5 fps vs. 5.3 fps) as the 60D. That bodes well for capturing motion. What doesn't is the raw buffer. If you hold the shutter down in continuous mode, it'll take 6 raw, 4 raw + JPEG, or up to 30 JPEGs before slowing down. That's barely a second of continuous raw shooting, much less than with the 60D's 16 raw frames. The difference matters if you're trying to time a particular moment. That aside, this T5i has a reasonably high hit-rate (50%+) with recent USM lenses in moderate to bright conditions. The next performance tier is the 7D, and after that, the 5D III.
I want to point out: DSLRs suffer when shooting stills from the rear screen. Standard SLR design has a mirror and a prism (or additional mirrors) reflect incoming light into both the viewfinder and the fast phase-detect AF array. If you want a live feed to the rear screen, that mirror has to flip up to expose the sensor, so you can't use that array to focus anymore. You're left with a 'contrast detect' system (or in this particular body, a slightly faster amalgam of contrast and phase-detect) that's much, much slower. Expect to use the viewfinder unless your subject is very still.
AS A POINT-AND-SHOOT:
If you set 'green box' mode and pretend this T5i is an oversized point-and-shoot, what implications?
* It makes more noise than a point-and-shoot. The mirror and shutter are definitely audible. Shutter lag can be much lower. Zoom is manual and effectively instant.
* The ergonomics don't work as well for rear-screen shooting. The camera is heavier and more awkward held in front of you, so blur from hand-shake will be more evident.
* Auto-exposure favors narrower apertures, slower shutter speeds, and lower ISOs than might be optimal. Particularly with lenses faster than f/2.8, it's less likely to choose the widest available aperture. Shooting indoors with a 35/2, for example, you're likely to see f/2.8, ISO 1600, and 1/50 instead of f/2 and 1/100.
* It won't use ISOs above 6400. Not that you'd want to, but some scenes may demand a faster shutter.
* Focus consistency and speed will depend on whether you've got an AF point on contrast. There's no great intelligence to AF-point selection, so it'll probably choose the wrong focus point about half the time. With slow lenses like the kit zooms, the error won't matter for the vast majority of shots.
* High-contrast lighting will produce variable results. The camera can't expose the whole scene correctly, so it'll guess what you want. Sometimes it'll guess wrong.
There are other full-auto modes on dial to deal with specific situations. They're useful in a pinch, but less predictable than what you can achieve with the semi-auto modes and the various metering controls.
T5i video is smoother, cleaner, and less contrasty than that of point-and-shoot cameras. As with stills, the right lenses can give you creamy backgrounds and professional-looking subject isolation. The corollary, though, is that focus actually matters. Your first impression reviewing footage is likely to be, "Why is everything always so blurry?"
Fortunately, autofocus in video mode was a major upgrade in the T4i and T5i. Canon DSLRs before the T4i had horribly slow contrast-detect AF that couldn't handle any subject motion at all. Canon's never bothered with manual focusing aids, so custom firmware or trial-and-error with the rear LCD were the only alternatives. Thanks to 'Hybrid AF,' this camera is not totally inept with movement. It doesn't work quickly or precisely with non-STM lenses, it tends to hunt (bringing the scene in and out of focus) with all lenses, it doesn't work well outside of the frame center (where it's assisted by phase-detect sensors) or in low light, and it's incapable of tracking anything faster than a caffeinated sloth. But it's not manual focus.
Realistically, if you want to film your kid playing soccer or running across the kitchen with DSLR quality, you've three options: prefocus, stop the lens down to get more depth-of-field, and try to stay perpendicular to the action; manually focus and accept that things won't be pin-sharp; or choose a mirrorless camera that can keep up.
Canon video is MOV format with H.264 compression. The implementation is inefficient and processing-intensive. You'll want a serious computer (quad-core), lots of space (350 MB/min at 1080p/30), and a decent video editor (e.g., Apple iMovie, Sony Vegas, Adobe Premiere Elements). Results improve with correct white balance and a custom tone curve with low contrast, color, and sharpening.
Beware camera shake. Anything over 50mm that isn't stabilized will challenge your ability to record smooth footage. You can fix that later by transcoding to an editable format and using the anti-shake facilities of Premiere, Vegas, or Virtual Dub with Deshaker, but that's a pain and they all crop the frame. This won't be issue until you start moving to primes; the two kit lenses are both stabilized. They're also STM, which means they focus by stepper motors that are (often) quieter and capable of smaller incremental movements than USM.
Certain full-frame stabilized lenses are audible on the audio track, as are the focusing mechanisms of non-STM lenses. You'll also have to contend with dial clicks, finger movement, and wind noise, which obscure what would be fairly mediocre sound quality in the best case. The T5i records CD-quality 48 KHz 16-bit stereo tracks; the fault is with the lack of isolation and baffling with the integrated stereo mic. The simplest, most portable alternative is to attach an external battery-powered mic in a shock mount to the flash hotshoe. The two most popular are around $250 from Rode. Zoom's H1 stereo recorder costs less and can also be camera-mounted.
Both kit lenses excel. The 18-135/3.5-5.6 STM in particular is the best consumer-class kit lens Canon has ever produced. If you upgrade, it'll be for more speed, a different range, or perhaps more contrast, not because it isn't sharp enough.
Some thoughts on future additions:
* Primes are lighter, smaller, cheaper, often available in wider apertures, often optically better, and have less manufacturing variation. They're less convenient, less versatile, updated with new technologies (e.g., stabilization, better lens coatings, weight reductions, faster or more accurate AF) less often, and can cause you to miss shots in fast-paced shooting environments.
* There are different requirements for movie lenses and still lenses. Some lenses are more optimal than others (e.g., less focus breathing, more parfocal, less distortion, smoother operation, distance scale). Primes often fare better.
* An f/2 lens on this body is just fast enough for most indoor use without flash. You'll want a flash for anything slower. A flash can provide more even, pleasing pictures, at the expense of a bulkier, attention-attracting rig.
* Kits with more than three primary lenses can become unwieldy in use. Two is preferable. My walkaround crop kit is a 10-22/3.5-4.5, a 50/1.4, and an 18-135-3.5-5.6 STM.
* Third-party lenses tend to have less upfront cost, better warranties, and more aggressive designs. AF and optical performance is often (but not always) inferior to OEM lenses, quality control is less consistent, and resale values are lower. Value varies by lens model. Some are better than the OEM equivalents (e.g., Tamron 70-300 VC). Some fill holes in the OEM lineup (e.g., Sigma 50-150/2.8 OS, Sigma 30/1.4). And some are lesser substitutes, but still competitive (e.g., Sigma 10-20/4-5.6). Third-party lenses that duplicate the OEM with similar performance may not always be preferable to used copies of the OEM model.
The most economical leap in image quality and subject isolation is the 50/1.8. But beware: this lens will lighten your pockets when you start seeking other lenses with the same effect.
For video, buy SD cards 32 GB or larger. My pair of 16 GB cards have been inadequate for even a one-day event. For stills, two or three 8 GB cards is plenty.
Interface responsiveness isn't much affected by card speed. Faster cards have three advantages: they can shoot longer bursts at 5 FPS, clear the picture buffer more quickly, and record video at the highest quality without risking a speed warning. Buffer depth is 30 JPEG files with a UHS-1 ('Ultra High Speed') SD and 22 with a conventional card, or 6 raw with any card. Buffer cycling times are much lower with UHS-1. In one-shot mode, this difference is invisible; very fast cards would only make sense if you were time-limited on card-to-computer transfers with a USB 3.0, SATA, or Firewire card reader.
If you buy protection filters for your lenses, try Hoya's "DMC PRO1 Clear Protector Digital" line. They have very high light transmission and cause no visible flare. Digital sensors filter UV natively, there's no reason to pay more for that feature. I've written reviews on the relevant Hoya product pages with more details and why you might (or might not) want a filter.
You gain continuous shooting speed, better AF for stills, and a touchscreen. The AF system will be faster and more accurate with wide-aperture lenses, particularly with off-center subjects. The hybrid-AF system is actually usable in slow video scenes, more than could be said for contrast-detect functionality in the T2i and T3i.
It's the same camera save for previewing image effects in Live View. The 18-55 kit lens is now STM. The 18-135 is the same; if the T4i with the 18-135 costs less, I'd choose that.
Of the 60D's many improvements, the hardest to work around is the raw buffer. You get one second at 5fps with the T5i. You get over three with the 60D. The T5i simply isn't a sports camera in raw unless you're judicious with your bursts. Shoot JPEG and it'll keep the pace all day. And shoot movies where anything moves at all and it'll leave the 60D behind in focusing performance.
Interface speed significantly favors the 60D if you're willing to learn the button assignments. Because it requires less button-pressing and the camera rarely needs to come off your face, it's faster than the T5i except for detailed picture review and choosing focus areas in Live View. The 60D actually costs less new, but don't choose the 18-135 kit. That's a non-STM lens much less sharp than the version the T5i includes.
I'm of two minds about this T5i. On the one hand, it's another fine evolution of small DSLRs (or rather, non-evolution; that sentence works if we pretend it's still called T4i). On the other, the question is whether you want a DSLR at all. Many people would fare better with mirrorless (e.g., Sony NEX, Panasonic G/GH) than a Rebel-class DSLR. They're smaller, lighter, and less clunky than the strange amalgam of 'Live View' and traditional mirror shooting that defines most current DSLRs. Focus is unerringly accurate with static subjects and vastly quicker in the movie modes. To their credit, DSLRs like this one have a broader array of narrow-purpose lenses (e.g., macro, tilt-shift, supertelephoto, superfast), far better motion tracking for stills, more subject isolation, faster and better physical controls, and if you spring for full-frame, superior noise performance.
If your priorities favor DSLRs, this isn't a bad one to choose. There's almost no photographic endeavor it can't handle. Higher-spec bodies get you better noise, speed, AF tracking, durability, and so on, but technology has advanced so quickly that if you're even vaguely methodical in shooting style, you're not likely to feel limited by this T5i. Look hard at the T4i and 60D before springing for it, though.
Please leave a comment if you intend to downvote so I can correct the inaccuracy.
on March 13, 2014
HISTORY_This is my first SLR camera of any kind. My first was a 1960s Brownie Kodak that used 110 film, then it was a 1980s Canon 35mm point n shoot, someone gave me a 1990s Fujifilm 2mp camera to get in the age of digital, the 2000s got more efficient with a Kodak P880 8mp semi-pro camera which was an awesome camera(they still sell for $100), and then Amazon forced me to get a Canon T5i. OK, not quite at gun point, but the deal was ridiculously good. After watching a YouTube review of the T3i vs. T5i, it was NO contest.
1st THOUGHTS_Canon almost got me on a 60x point n shoot at Costco, but I payed the bigger bucks, and am not sorry. I thought my Kodak pics with the nice S&K lens were great, but these are WOW. The only pictures that don't turn out and look great are the ones I have been setting up on manual, which produces wonderful results with a little more trial and error.
PICTURES_I got it with only the stock 18-55mm lens and some of the Macro shots of spring blossoms fill an HDTV space with jaw dropping colorific pics. I just ordered the $10 macro reversing ring to play around with some superduper close-ups without having to spend $3-400 on the real macro stuff. Just about everything set on auto that I've taken turns out sharp and clear, and seemed dud-proof. My friends are not the SLR owning crowd and have been very praising of the few shots I have shared.
CAMERA BODY_I'm a big guy, the camera is surprisingly light, and is not a problem to wander around with this hanging about your neck or in a side bag. Construction seems to be of strong gauge plastic with not much metal visible. Strap is very comfy too. There is NO(?) connector string for the lens cap. Spinning and flipout color screen is very useful. I have already used it for taking pics at goofy angles which make using the eye piece impossible. Controls, buttons, and switches are layed out nicely, The on-off switch and selector wheels literally feel like a Fisher-Price Toy they are so solidly built, and seem like they may last a while. Nothing on the camera feels flimsy. The battery is doubled locked in it's compartment, which I thought was an impressive touch. One drop and most batteries will barge their way out of a camera and damage the door.
WHAT'S INSIDE_Having read many reviews before purchasing this unit, I really liked the difference between the Canon and Nikon, and the ones that put me over to Canon, fast action photography and ease of controls use. Watch any sporting event and the only lenses you see on the sidelines are white Canon lenses for fast action play. The reviews appear to be correct. I read the manual on my Kindle, computer, and the book for the first week. I tried to get up to speed, and the software and controls on the camera were very simple to follow. The camera actually gives you multiple ways to accomplish a software change with wheels, direction buttons, and a super nice touch screen display. Touch screen is one of the best parts of the camera. I tell people to read directions, do they listen, no. I do, and it makes difference no matter what the electronics. Go to YouTube and watch videos, it helps a lot.
The battery charges fully in 1-2 hours. Having had the Kodak P880 before this did help ease into learning how to operate the camera. Read the directions and take pictures of anything as you go and see what they look like. I poked my head out the front door and took a handheld 3 second night exposure of streaky car traffic lights. A little unfocused but I learned how to do it when I have tripod in hand. I went back through some initial pics and post effected them with grainy BW or amped colors for some very nice artsy visuals. The software also defaults to save your original pic. The software discs that comes in the box provide manuals, and very good picture editing tools. They call them professional, but it isn't Adobe, I know that much, and does all I need it to do.
HD VIDEO_I may add to this later. The STM lens focusing system is a must for video. I watched a YouTube video and the focusing is silent compared to lenses of the past. Even the USM lenses were adding noise to the video, just like my old Kodak did. I have turned it on, and the STM focusing is as advertised, quiet! The T5i is STM approved. T3i...NOT.
FINAL NOTES_Even if you just use the no-brainer settings, the camera is well worth it. With IS(image stabilization), new STM(works on a sliding principle) lens focusing, and other Canon technology, the T5i will make your memories foolproof. There are pros doing reviews here on more technical items and I will not try to offer that level of reflection. I know how to build a great computer, but have no where near mastered what this T5i is capable of. Many reviews say this is a good starter $700 camera, and I believe them now, but like the computers I build, you need to do more than check mail. AND read the directions!! Professional photographers are spending thousands on just the body of a camera. I'm not there yet, or maybe never. Right now, the T5i, looks pro enough.
UPDATE 2015-06-24: I still really like my T5i!! After a year and a half of use and several thousand clicks to boot, I know what it can and can't do well. I have even started doing some research into the 70D, but not the LCD tiltless 7D, which is the top of the line APS-C. I'm going to update some pictures here also. The T5i pictures are always downloaded to my computer and HDTV. These are ridiculously awesome viewed on a big screen. My friend has a very nice iMac Apple computer and they do not measure up to the HDTV at 46 inches or larger.
I just returned form Yosemite, Kings Canyon, Lassen volcano, and several zoos, with picture you can only stare at in amazement. Vacation photos and video never looked so good. The T5i has a 4 second video snapshot feature that stiches all the clips together for one movie. Your friends will love you, because they don't need to watch home movies lasting more than a few minutes. At zoos, this is a huge bonus. The T5i is not the pinnacle of cameras but it can make you look like a pro to your non techie friends, and easily. One more tip on video, and this is fun. Load the supplied software, connect your camera to the PC, convert some of your favorite music to WAV(only), download the WAV files to your SD card via the usb cable, and voila, you hear your music instead of the low quality sound picked up by the in-camera mike. Turn off the mike so that it is silent. Also, turn on the audio wind filter if you want that sound. I listen to my videos with the new Sherlock Holmes BBC soundtrack, goes with everything.
I really thought the versatile LCD screen would be really nice for photo taking, but is just useful for some video and video viewing. The eye piece viewer is still the best for picture taking. One thing I just learned, I have always left the image stabilizer on. I have started using the camera without it and have had some revelating(new word) results. The image stabilizer holds the camera back from doing instant focus. Getting a picture of a bee has been impossible with the IS on, but off, the T5i will focus instantly, instead of hunting for AF, and then it is too late. This is also the dilemma for video on the T5i, and has tendency to hunt for focus. If you do the 4 second clip video, sometimes half the clip is horribly blurred before snapping into clarity.
Look at a guy like Ansel Adams(genius), the guy could out shoot 99.9 percent of the waking camera public with a shoe box pinhole camera. His favorite 'til the day he died was not a very a fancy camera in the least. It will always boil down to how good and persistent you are with whatever tool you have in the box.
The t4i and t5i in the hands of real pros can produce stunning pictures, but again, one is older than the other. The main reason Canon dumped the t4i, and you won't get them to admit it, was too much zinc in the rubber grip handles. This produced several episodes of allergic skin reactions/discoloration of the grip itself, and corporations run away from potential lawsuits with track shoes laced up. Since the t4i was dumped hurriedly, Canon decided to add a few new great wrinkles to the mix, mainly the STM lens line up, and the battery will get you another 100 shots per charge(big plus). I think those two and no lawsuits are winners.
The 70d and 7d(top o' line of APS-C) are just above this T5i in one and two position. Canon's 6D is the entry level full frame(non APS-C) but suffers the same video problems as the t5i, or so I hear. The HD video performance on the 7's is outstandingly better than the t5i which sometimes has a tendency to hunt for focus with the image stabilizer on. 70d is another $300 more than the t5i and has better specs. 70d is $1,100 with two lenses, plus extras. It even has the new dual AF, which really helps on the video end. I purchased the 55-250mm and it has been the biggest boost to my picture abilities. Only until a recent camping trip did I long for a 400mm, when I got some decent pics of an Osprey across the river and high on a branch. My best nature shot so far. Generally, the 250mm range gets you almost everything, and nicely, I will do a separate review of that lens. Some reviewers claim it is in L glass class, and I believe it, but have not used L myself.
The T5i with two lenses, and extras sells for $800, which is an unbelievable deal. The 70D is $1,100-1,200 and sports better specs than the T5i, with two lenses and extras. For $300-400 more, if the piggy bank allows, buy the 70D, with the new dual AF system, wifi, and more. So much for this update.
Does the Canon Rebel T5i work as a compromise "not wicked expensive" digital SLR? And is it better than previous versions? There are some advantages over the T3i and T4i. If you're shopping for an entry-level Canon DSLR, there is a short summary at the end of this review if you want to jump to the chase.
I chose another Canon because I'm familiar with the Rebel setup. If you are looking for more professional gear, you should investigate full frame cameras and higher end versions of DSLR's as they have technical advantages (Eliminating the through-the-lens cropping and noise, to name a few.) I'm a vacation hobby photographer so I don't need to spend bucks on more power than I need. I ended up with the T5i after a lot of agonizing, and I'm VERY happy with it. It worked flawlessly, right out of the box and I instantly enjoyed the upgraded, touch LCD and improved focus screen, the textured coating for good grip, and the improved resolution and speed. I'm very happy with my choice. But--will you be? And how can you save money on buying a DSLR?
A Little Background
I needed upgrade my Canon EOS DS6041 which is one of the oldest Rebels. Canon Rebel DSLR's are "entry level DSLR" or digital single lens reflex cameras, a step up from the point-and-shoot because they have interchangeable lenses and you are not bound to the optics provided on your camera body. One thing to understand (this took me a while!) --many DSLRs do not take a picture with the full frame. Your old film SLR took a picture 24mm x 36mm. On a Digital SLR, the sensor is sized to crop the picture, as if you were cutting off the outside edges. If a sensor is 24mm x 36mm, then there is no crop factor, since it covers the same area as 35mm film. The Rebel sensor is equivalent to one of those compact APC-S cameras, so the field is 1.6x smaller than a 35mm film frame, or about 22.2mm x 14.8mm compared to the 24mm x 36mm. If you want full-frame, you have to move up to a different line of DSLR (and spend more.)
The entry-level DSLR field is crowded with models and this is not helped by Canon issuing new models on the heels of older ones and selling them simultaneously. The good news is that the older models are not obsolete, and their prices have dropped, so the buyer has a lot of choice, even if it's confusing. I struggled so much with choosing an upgrade, it took me months to figure out what I needed. I ended up with the T5i and I'm quite happy about it. Depending on your needs, this may be "the one." But you could choose other models and spend less, or spend more depending on your own needs. Maybe my experience can help you narrow it down.
WHAT ARE THE FEATURES?
The general feature set is:
Resolution 18 megapixels
3X Optical zoom
Optical sensor size 14.9 x 22.3mm
CMOS Optical sensor
Optical Image stabilizer
Flip screen-fold out screen LCD with touch screen
Speed ("film" speed) range: ISO 100 - ISO 12800/ 25600
Video Specs: H.264 QuickTime MOV 1080/30p/ 25p/24p; 720/60p/ 50p Video Snapshot Mode included
Autofocus: 9-pt AF all cross-type; center cross to f2.8
Release date: April 2013
THINGS IT DOES NOT HAVE
Wifi (but you can add an SD card that does this; you have upgrade to a 70D to get this onboard.)
No Time-Lapse setting
No Multiple Exposure setting
The camera body is covered with a textured rubberized coating. My old Rebel (DS6041, 10yrs old) had an aluminum body with a rubberized grip area. Over time, the rubber coating rubbed off where finger oils accumulated. Seems Canon may have issues with coatings because there is a rumor that the T5i came out to replace the T4i so soon (barely half a year) due to reports that some people had an allergic reaction to the T4i coating. I can't tell you if this is true. I didn't even want to go there to find out. It was one reason I chose the T5i over the T4i even though they are practically the same.
The wheel control on top has been changed from the T4i to put some night exposure features and backlight settings under "SCM" rather than all on the wheel. Not sure I like this: don't care about night shooting being more work to access, but backlighting is something I get concerned about on the fly and I needed practice to get set up quickly. It's well to work through your most common settings so you can be ready and not have to stumble through when out shooting in the field.
NEW 18-55mm LENS, LCD CHANGES
Another reason to choose the T5i was the 18-55 lens has been upgraded with better, faster focus motor EF-S 18-55mm f/3.5-5.6 IS STM versus the older USM. I use a standard 18-55mm even though much of the time, I'm shooting with a 70-250mm or 70-300mm zoom. Depending on what I'm doing, I don't like to change lenses, so I do use the standard lens. If you do too, this is a good reason to choose a T5i over older models. If you do NOT use this lens and buy your lenses separately to choose your preferred lens, then either the body alone or an older body version would do just fine.
The LCD screen has been giving a stronger coating for more durability.
The live-view in video is 60fps, not 30fps. I didn't care, as I mainly do still shots. If you do video more often, you might care as you can review your video real-time and see a better rendition of it.
This camera is a lot lighter than my old DSLR and so is the lens. (Helps with handholding--less shaking if it's lighter to hold.) The textured surface is nice and grippy. The BIG improvement other than the much higher resolution is the LCD touch screen--larger, easier to use. The addition of video is handy, though I'd still possibly carry my tiny old FlipVideo because if you run a lot of video, you run down the battery. A spare battery, fully charged, is a must to keep with you, and a travel plug for the charger because it's wide-ranging 110-220v, if you go outside the US.
The better resolution (6.3mp to 18mp) is obviously a huge step-up for me. I can enlarge photos digitally with less noise. The improvement in low light speed is also a big deal. I like night photography; it was practically impossible with my old DSLR.
SUMMARY & COMPARISON
This is the best digital camera I've ever used. The ease of the touch screen that swings out lets me do manual shots as well as videos with perfect ease. I have done everything from night shots to action to video and I can't believe how much I enjoy using this camera.
Comparisons and how to save money:
T5i vs T4i: Better standard lens (if you get a lens plus body), 60FPS live view for video, new coating (rumored) on body
T5i vs T3i: Many differences (many on T4i as well) Autofocus is Center Cross on T3i, Continuous AF-All cross-type on T5i. Continuous shooting speed 3.7 FPS on T3i vs 5 FPS on T5i. "Film" speed range ISO 100 - ISO 6400 / 12800 on T3i vs ISO 100 - ISO 12,800 / 25600 on the T5i. TOUCH screen is new on the T4i-T5i; the T3i doesn't have this.
If you are new to Digital SLR's and moving up from Point & Shoot you can save quite a bit of money on the popular T3i and never miss a beat. If you are more experienced with DSLR's, the choice between T3i, T4i, and T5i would lean towards T5i expecially if you shop around because you can find some good deals. I bought my T5i directly from Canon as a refurb on a special sale and it saved 30% of the price. There are sales and special rebate offers constantly, so it pays to shop around.
If you are verging on the professional and find limitations (noise, speed, other issues) with entry-level SLR's and price is not an issue, the 70D may be a better choice or going with a full frame DSLR.