Canon T7i versus Sony A7 II
The Canon EOS Rebel T7i (called Canon 800D in some regions) and the Sony Alpha A7 II are two digital cameras that were revealed to the public, respectively, in February 2017 and November 2014. The T7i is a DSLR, while the A7 II is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (T7i) and a full frame sensor. Both cameras offer a resolution of 24 megapixel.
The physical size and weight of the Canon T7i and the Sony A7 II are illustrated in the side-by-side display below. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth dimensions are rounded to the nearest millimeter. If you prefer, you can also use the toggle button to switch to a comparison in percentage terms (in this case, the camera on the left side – the T7i – represents the basis for the calculations across all the size and weight measures).
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7 II is notably smaller (7 percent) than the Canon T7i. However, the A7 II is markedly heavier (13 percent) than the T7i. It is noteworthy in this context that the A7 II is splash and dust-proof, while the T7i does not feature any corresponding weather-sealing.
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. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can find an overview of optics for the two cameras in the Canon EF Lens Catalog (T7i) and the Sony FE Lens Catalog (A7 II). Mirrorless cameras, such as the A7 II, have moreover the advantage that they can use many lenses from other systems via adapters, as they have a relatively short flange to focal plane distance.
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, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible comparisons there.
|Camera Body Specifications
|Canon T7i (⇒ rgt)||131 mm||100 mm||76 mm||532 g||600||no||2017||749||latest||check|
|Sony A7 II (⇒ lft)||127 mm||96 mm||60 mm||599 g||350||YES||2014||1,999||discont.||check|
|Canon T7 (⇒ lft | rgt)||129 mm||101 mm||78 mm||475 g||500||no||2018||449||latest||check|
|Canon 77D (⇒ lft | rgt)||131 mm||100 mm||76 mm||540 g||600||no||2017||899||latest||check|
|Canon M6 (⇒ lft | rgt)||112 mm||68 mm||45 mm||390 g||295||no||2017||779||latest||check|
|Canon SL2 (⇒ lft | rgt)||122 mm||93 mm||70 mm||453 g||650||no||2017||549||latest||check|
|Canon T6 (⇒ lft | rgt)||129 mm||101 mm||78 mm||485 g||500||no||2016||449||discont.||check|
|Canon G7 X Mark II (⇒ lft | rgt)||106 mm||61 mm||42 mm||319 g||265||no||2016||699||latest||check|
|Canon T6i (⇒ lft | rgt)||132 mm||101 mm||78 mm||555 g||440||no||2015||749||discont.||check|
|Canon T6s (⇒ lft | rgt)||132 mm||101 mm||78 mm||565 g||440||no||2015||849||discont.||check|
|Canon T5i (⇒ lft | rgt)||133 mm||100 mm||79 mm||580 g||440||no||2013||649||discont.||check|
|Nikon D5600 (⇒ lft | rgt)||124 mm||97 mm||70 mm||465 g||970||no||2016||699||latest||check|
|Olympus E-M1 II (⇒ lft | rgt)||134 mm||91 mm||67 mm||574 g||440||YES||2016||1,999||latest||check|
|Sony A7 III (⇒ lft | rgt)||127 mm||96 mm||74 mm||650 g||610||YES||2018||1,999||latest||check|
|Sony A7R II (⇒ lft | rgt)||127 mm||96 mm||60 mm||625 g||290||YES||2015||3,199||discont.||check|
|Sony A7 (⇒ lft | rgt)||127 mm||94 mm||48 mm||474 g||340||YES||2013||1,699||discont.||check|
|Sony A7R (⇒ lft | rgt)||127 mm||94 mm||48 mm||465 g||340||YES||2013||2,299||discont.||check|
The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The T7i was launched at a markedly lower price (by 63 percent) than the A7 II, 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.
The size of the imaging sensor is a crucial determinant of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color depth than smaller pixels 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.
Of the two cameras under consideration, the Canon T7i features an APS-C sensor and the Sony A7 II a full frame sensor. The sensor area in the A7 II is 158 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.6 and 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
Even though the A7 II has a larger sensor, both cameras offer the same resolution of 24 megapixel. This implies that the A7 II has a lower pixel density and larger individual pixels (with a pixel pitch of 5.97μm versus 3.72μm for the T7i), which gives it a potential advantage in terms of light gathering capacity. It should, however, be noted that the T7i is much more recent (by 2 years and 2 months) than the A7 II, and its sensor will have benefitted from technological advances during this time that at least partly compensate for the smaller pixel size.
Consistent information on actual sensor performance is available from DXO Mark for most cameras. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
|Canon T7i (⇒ rgt)||APS-C||24.0||6000||4000||1080/60p||..||..||..||..|
|Sony A7 II (⇒ lft)||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90|
|Canon T7 (⇒ lft | rgt)||APS-C||24.0||6000||4000||1080/30p||..||..||..||..|
|Canon 77D (⇒ lft | rgt)||APS-C||24.0||6000||4000||1080/60p||..||..||..||..|
|Canon M6 (⇒ lft | rgt)||APS-C||24.0||6000||4000||1080/60p||..||..||..||..|
|Canon SL2 (⇒ lft | rgt)||APS-C||24.0||6000||4000||1080/60p||23.6||13.4||1041||79|
|Canon T6 (⇒ lft | rgt)||APS-C||17.9||5184||3456||1080/30p||-||-||-||-|
|Canon G7 X Mark II (⇒ lft | rgt)||1-inch||20.0||5472||3648||1080/60p||-||-||-||-|
|Canon T6i (⇒ lft | rgt)||APS-C||24.0||6000||4000||1080/60p||22.7||12.0||919||71|
|Canon T6s (⇒ lft | rgt)||APS-C||24.0||6000||4000||1080/30p||22.6||12.0||915||70|
|Canon T5i (⇒ lft | rgt)||APS-C||17.9||5184||3456||1080/30p||21.7||11.2||681||61|
|Nikon D5600 (⇒ lft | rgt)||APS-C||24.0||6000||4000||1080/60p||24.1||14.0||1306||84|
|Olympus E-M1 II (⇒ lft | rgt)||Four Thirds||20.2||5184||3888||4K/30p||23.7||12.8||1312||80|
|Sony A7 III (⇒ lft | rgt)||Full Frame||24.0||6000||4000||4K/30p||..||..||..||..|
|Sony A7R II (⇒ lft | rgt)||Full Frame||42.2||7952||5304||4K/30p||26.0||13.9||3434||98|
|Sony A7 (⇒ lft | rgt)||Full Frame||24.0||6000||4000||1080/60p||24.8||14.2||2248||90|
|Sony A7R (⇒ lft | rgt)||Full Frame||36.2||7360||4912||1080/60p||25.6||14.1||2746||95|
Many modern cameras are not only capable of taking still images, but can also record movies. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, and both provide the same movie specifications (1080/60p).
Beyond body and sensor, cameras can and do differ across a range of features. For example, the A7 II has an electronic viewfinder (2400k dots), while the T7i 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 adjacent table lists some of the other core features of the Canon T7i and Sony A7 II along with similar information for a selection of comparators. The full specs-sheets can be found in the camera manual or, for example, in the dpreview camera hub.
|Canon T7i (⇒ rgt)||optical||no||3.0||1040||swivel||YES||4000||6.0||12||no|
|Sony A7 II (⇒ lft)||2400||no||3.0||1230||tilting||no||8000||5.0||no||YES|
|Canon T7 (⇒ lft | rgt)||optical||no||3.0||920||fixed||no||4000||3.0||9.2||no|
|Canon 77D (⇒ lft | rgt)||optical||YES||3.0||1040||swivel||YES||4000||6.0||12||no|
|Canon M6 (⇒ lft | rgt)||no||no||3.0||1040||tilting||YES||4000||9.0||5||no|
|Canon SL2 (⇒ lft | rgt)||optical||no||3.0||1040||swivel||YES||4000||5.0||9.8||no|
|Canon T6 (⇒ lft | rgt)||optical||no||3.0||920||fixed||no||4000||3.0||9.2||no|
|Canon G7 X Mark II (⇒ lft | rgt)||no||no||3.0||1040||tilting||YES||2000||8.0||7||YES|
|Canon T6i (⇒ lft | rgt)||optical||no||3.0||1040||swivel||YES||4000||5.0||12||no|
|Canon T6s (⇒ lft | rgt)||optical||YES||3.0||1040||swivel||YES||4000||5.0||12||no|
|Canon T5i (⇒ lft | rgt)||optical||no||3.0||1040||swivel||YES||4000||5.0||13||no|
|Nikon D5600 (⇒ lft | rgt)||optical||no||3.2||1037||swivel||YES||4000||5.0||12||no|
|Olympus E-M1 II (⇒ lft | rgt)||2360||no||3.0||1037||swivel||YES||8000||18.0||no||YES|
|Sony A7 III (⇒ lft | rgt)||2359||no||3.0||922||tilting||YES||8000||10||no||YES|
|Sony A7R II (⇒ lft | rgt)||2400||no||3.0||1229||tilting||no||8000||5.0||no||YES|
|Sony A7 (⇒ lft | rgt)||2400||no||3.0||1230||tilting||no||8000||5.0||no||no|
|Sony A7R (⇒ lft | rgt)||2400||no||3.0||1230||tilting||no||8000||4.0||no||no|
The T7i is a current model that online retailers, such as amazon, will have in stock. In contrast, the A7 II has been discontinued (but it can be found pre-owned on ebay). As a replacement in the same line of cameras, the A7 II was succeeded by the Sony A7 III.
So what conclusions can be drawn? Is the Canon T7i better than the Sony A7 II or vice versa? A synthesis of the relative strong points of each of the models is listed below.
Advantages of the Canon EOS Rebel T7i:
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- More flexible LCD: Has swivel screen for odd-angle shots in portrait or landscape orientation.
- Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
- Faster burst: Shoots at higher frequency (6 vs 5 flaps/sec) to capture the decisive moment.
- Less heavy: Is lighter (by 67g or 11 percent) and hence easier to carry around.
- Longer lasting: Can take more shots (600 versus 350) on a single battery charge.
- Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
- More affordable: Was introduced into a lower priced category (63 percent cheaper at launch).
- More modern: Reflects 2 years and 2 months of technical progress since the A7 II launch.
Arguments in favor of the Sony Alpha A7 II:
- Better low-light imaging: Features bigger pixels on a larger sensor for better high-ISO images.
- More framing info: Has an electronic viewfinder that displays shooting data.
- More detailed LCD: Has a higher resolution rear screen (1230k vs 1040k dots).
- Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- More legacy lens friendly: Can use many non-native lenses via adapters.
- Sharper images: Has stabilization technology build-in to reduce the impact of hand-shake.
- More heavily discounted: Has been around for much longer (launched in November 2014).
If the count of individual advantages (bullet points above) is taken as a guide, the T7i comes out slightly ahead of the A7 II (9 : 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.
In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains incomplete and does no justice, for example, to the way the T7i or the A7 II handle or perform in practice. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased. This is why expert reviews are important. The following table reports the overall rankings of the cameras as published by some of the major camera review sites. The detailed reviews can be accessed, respectively, on the websites of cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.
|Canon T7i (⇒ rgt)||..||80/100 Gold||4.5/5||..||4/5||2017||749||latest||check|
|Sony A7 II (⇒ lft)||Rec||82/100 Silver||4.5/5||5/5||5/5||2014||1,999||discont.||check|
|Canon T7 (⇒ lft | rgt)||..||..||..||..||..||2018||449||latest||check|
|Canon 77D (⇒ lft | rgt)||..||82/100 Silver||4.5/5||..||4/5||2017||899||latest||check|
|Canon M6 (⇒ lft | rgt)||-||80/100 Silver||4/5||4.5/5||4/5||2017||779||latest||check|
|Canon SL2 (⇒ lft | rgt)||HiRec||78/100 Silver||4.5/5||-||4.5/5||2017||549||latest||check|
|Canon T6 (⇒ lft | rgt)||reviewed||73/100||4/5||3.5/5||4/5||2016||449||discont.||check|
|Canon G7 X Mark II (⇒ lft | rgt)||HiRec||81/100 Silver||4.5/5||4/5||4.5/5||2016||699||latest||check|
|Canon T6i (⇒ lft | rgt)||-||75/100||4.5/5||4.5/5||4.5/5||2015||749||discont.||check|
|Canon T6s (⇒ lft | rgt)||Rec||77/100 Silver||4.5/5||4.5/5||4.5/5||2015||849||discont.||check|
|Canon T5i (⇒ lft | rgt)||-||76/100 Silver||4.5/5||4.5/5||4.5/5||2013||649||discont.||check|
|Nikon D5600 (⇒ lft | rgt)||-||79/100 Silver||4.5/5||4.5/5||4/5||2016||699||latest||check|
|Olympus E-M1 II (⇒ lft | rgt)||HiRec||85/100 Gold||4.5/5||5/5||4.5/5||2016||1,999||latest||check|
|Sony A7 III (⇒ lft | rgt)||HiRec||..||..||..||..||2018||1,999||latest||check|
|Sony A7R II (⇒ lft | rgt)||HiRec||90/100 Gold||5/5||4.5/5||5/5||2015||3,199||discont.||check|
|Sony A7 (⇒ lft | rgt)||HiRec||80/100 Silver||5/5||4.5/5||5/5||2013||1,699||discont.||check|
|Sony A7R (⇒ lft | rgt)||HiRec||82/100 Gold||4.5/5||5/5||5/5||2013||2,299||discont.||check|
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. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, 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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