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Canon 70D versus Sony A77 II

The Canon EOS 70D and the Sony Alpha SLT-A77 II are two enthusiast cameras that were revealed to the public, respectively, in July 2013 and May 2014. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The Canon has a resolution of 20 megapixel, whereas the Sony provides 24 MP. Read on to find out how these two cameras compare with respect to their size, their sensors, their features, and their reception by expert reviewers.

Body comparison: Canon 70D vs Sony A77 II

An illustration of the physical size and weight of the Canon 70D and the Sony A77 II is provided in the side-by-side display below. Three consecutive views from the front, the top, and the rear side are shown. All size dimensions are rounded to the nearest millimeter. You can also toggle the display to switch to a percentage comparison if you prefer that the measures are being expressed in relative terms (in this case, the camera on the left side – the 70D – represents the basis for the calculations across all the size and weight measures).

Compare Canon 70D vs Sony A77 II
70D versus A77 II top view
70D and A77 II rear side
Body view (70D on the left)

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A77 II is somewhat larger (3 percent) than the Canon 70D. However, the A77 II is markedly lighter (14 percent) than the 70D. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.

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. Hence, you might want to study the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

Concerning battery life, the 70D gets 920 shots out of its LP-E6 battery, while the A77 II can take 480 images on a single charge of its NP-FM500H 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, 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 camera comparisons there.

Camera Body Specifications
Camera Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(y/n)
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Canon 70D (⇒ rgt) 139 mm 104 mm 79 mm 755 g 920 YES 2013 1,199discont. check
Sony A77 II (⇒ lft) 143 mm 104 mm 81 mm 647 g 480 YES 2014 1,199 latest check
Canon 80D (⇒ lft | rgt) 139 mm 105 mm 79 mm 730 g 960 YES 2016 1,199 latest check
Canon G3 X (⇒ lft | rgt) 123 mm 77 mm 105 mm 733 g 300 YES 2015 999 latest check
Canon 7D II (⇒ lft | rgt) 149 mm 112 mm 78 mm 910 g 670 YES 2014 1,799 latest check
Canon T5i (⇒ lft | rgt) 133 mm 100 mm 79 mm 580 g 440 no 2013 649discont. check
Canon 6D (⇒ lft | rgt) 145 mm 111 mm 71 mm 770 g 1090 YES 2012 2,099discont. check
Canon 60D (⇒ lft | rgt) 145 mm 106 mm 79 mm 755 g 1100 YES 2010 1,399discont. check
Canon 7D (⇒ lft | rgt) 148 mm 111 mm 74 mm 860 g 800 YES 2009 1,699discont. check
Canon 50D (⇒ lft | rgt) 146 mm 108 mm 74 mm 822 g 800 YES 2008 1,299discont. check
Nikon D7200 (⇒ lft | rgt) 136 mm 107 mm 76 mm 765 g 1110 YES 2015 1,199discont. check
Nikon D7100 (⇒ lft | rgt) 136 mm 107 mm 76 mm 765 g 950 YES 2013 1,199discont. check
Panasonic GX8 (⇒ lft | rgt) 133 mm 78 mm 63 mm 487 g 330 YES 2015 1,199discont. check
Sony A9 (⇒ lft | rgt) 127 mm 96 mm 63 mm 673 g 650 YES 2017 4,499 latest check
Sony A7 II (⇒ lft | rgt) 127 mm 96 mm 60 mm 599 g 350 YES 2014 1,999discont. check
Sony RX10 (⇒ lft | rgt) 129 mm 88 mm 102 mm 813 g 420 YES 2013 1,299discont. check
Sony A77 (⇒ lft | rgt) 143 mm 104 mm 81 mm 732 g 470 YES 2011 1,999discont. check

The price is, of course, an important factor in any camera decision. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The two cameras under review were launched at the same price and fall into the same 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.


Sensor comparison: Canon 70D vs Sony A77 II

The size of the sensor inside a digital camera is one of the key determinants 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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its 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 A77 II is 9 percent bigger. As a result of these sensor size differences, the cameras have format factors, respectively, of 1.6 (70D) and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Canon 70D and Sony A77 II sensor measures
Sensor size

With 24MP, the A77 II offers a higher resolution than the 70D (20MP), but the A77 II has smaller individual pixels (pixel pitch of 3.91μm versus 4.11μm for the 70D). Yet, the A77 II is a somewhat more recent model (by 9 months) than the 70D, and its sensor might have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units.

70D versus A77 II MP
Sensor resolution

Consistent information on actual sensor performance is available from DXO Mark for most 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. 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 Sensor
Class
Resolution
(Megapixel)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Canon 70D (⇒ rgt) APS-C 20.0 5472 3648 1080/30p 22.5 11.6 926 68
Sony A77 II (⇒ lft) APS-C 24.0 6000 4000 1080/60p - - - -
Canon 80D (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 23.6 13.2 1135 79
Canon G3 X (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 21.4 12.3 521 63
Canon 7D II (⇒ lft | rgt) APS-C 20.0 5472 3648 1080/60p 22.4 11.8 1082 70
Canon T5i (⇒ lft | rgt) APS-C 17.9 5184 3456 1080/30p 21.7 11.2 681 61
Canon 6D (⇒ lft | rgt) Full Frame 20.0 5472 3648 1080/30p 23.8 12.1 2340 82
Canon 60D (⇒ lft | rgt) APS-C 17.9 5184 3456 1080/30p 22.2 11.5 813 66
Canon 7D (⇒ lft | rgt) APS-C 17.9 5184 3456 1080/30p 22.0 11.7 854 66
Canon 50D (⇒ lft | rgt) APS-C 15.1 4752 3168 no 21.8 11.4 696 63
Nikon D7200 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 24.5 14.6 1333 87
Nikon D7100 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 24.2 13.7 1256 83
Panasonic GX8 (⇒ lft | rgt) Four Thirds 20.2 5184 3888 4K/30p 23.5 12.6 806 75
Sony A9 (⇒ lft | rgt) Full Frame 24.0 6000 4000 4K/30p 24.9 13.3 3517 92
Sony A7 II (⇒ lft | rgt) Full Frame 24.0 6000 4000 1080/60p 24.9 13.6 2449 90
Sony RX10 (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 22.9 12.6 474 69
Sony A77 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 24 13.2 801 78

Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the A77 II provides a faster frame rate than the 70D. It can shoot movie footage at 1080/60p, while the Canon is limited to 1080/30p.

Feature comparison: Canon 70D vs Sony A77 II

Beyond body and sensor, cameras can and do differ across a range of features. For example, the A77 II has an electronic viewfinder (2359k dots), while the 70D 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 70D and Sony A77 II along with similar information for a selection of comparators. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.

Core Features
Camera Viewfinder
(Type or
'000 dots)
Control
Panel
(Y/n)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(Y/n)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec))
Build-in
Flash
(GN)
Build-in
Image
Stab
Canon 70D (⇒ rgt) optical YES 3.0 1040 swivel YES 8000 7.0 12 no
Sony A77 II (⇒ lft) 2359 YES 3.0 1229 full-flex no 8000 12.0 12 YES
Canon 80D (⇒ lft | rgt) optical YES 3.0 1040 swivel YES 8000 7.0 12 no
Canon G3 X (⇒ lft | rgt) no no 3.2 1620 tilting YES 2000 5.9 6.8 YES
Canon 7D II (⇒ lft | rgt) optical YES 3.0 1040 fixed no 8000 10.0 11 no
Canon T5i (⇒ lft | rgt) optical no 3.0 1040 swivel YES 4000 5.0 13 no
Canon 6D (⇒ lft | rgt) optical YES 3.0 1040 fixed no 4000 4.5 no no
Canon 60D (⇒ lft | rgt) optical YES 3.0 1040 swivel no 8000 5.3 13 no
Canon 7D (⇒ lft | rgt) optical YES 3.0 920 fixed no 8000 8.0 12 no
Canon 50D (⇒ lft | rgt) optical YES 3.0 920 fixed no 8000 6.3 13 no
Nikon D7200 (⇒ lft | rgt) optical YES 3.2 1229 fixed no 8000 6.0 12 no
Nikon D7100 (⇒ lft | rgt) optical YES 3.2 1229 fixed no 8000 6.0 12 no
Panasonic GX8 (⇒ lft | rgt) 2360 no 3.0 1040 swivel YES 8000 10.0 no YES
Sony A9 (⇒ lft | rgt) 3686 no 3.0 1440 tilting YES 8000 20.0 no YES
Sony A7 II (⇒ lft | rgt) 2400 no 3.0 1230 tilting no 8000 5.0 no YES
Sony RX10 (⇒ lft | rgt) 1440 YES 3.0 1229 tilting no 3200 10.0 10.2 YES
Sony A77 (⇒ lft | rgt) 2359 YES 3.0 921 full-flex no 8000 12.0 12 YES

The A77 II is a current model that online retailers, such as amazon, will have in stock. In contrast, the 70D has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the 70D was succeeded by the Canon 80D.

Review summary: Canon 70D vs Sony A77 II

So what is the bottom line? Is the Canon 70D better than the Sony A77 II or vice versa? A synthesis of the relative strong points of each of the models is listed below.


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Arguments in favor of the Canon EOS 70D:

  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Longer lasting: Can take more shots (920 versus 480) on a single battery charge.
  • More heavily discounted: Has been on the market for longer (launched in July 2013).

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Advantages of the Sony Alpha SLT-A77 II:

  • More detail: Has more megapixels (24 vs 20MP), which boosts linear resolution by 10%.
  • Better video: Provides higher movie framerates (1080/60p versus 1080/30p).
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • More detailed LCD: Has a higher resolution rear screen (1229k vs 1040k dots).
  • Faster burst: Shoots at higher frequency (12 vs 7 flaps/sec) to capture the decisive moment.
  • Less heavy: Has a lower weight (by 108g or 14 percent) and is thus easier to take along.
  • Sharper images: Has stabilization technology build-in to reduce the impact of hand-shake.
  • More modern: Was introduced somewhat (9 months) more recently.

If the count of individual advantages (bullet points above) is taken as a guide, the A77 II is the clear winner of the contest (8 : 4 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.

70D 04:08 A77 II

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 70D or the A77 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 hands-on reviews by experts are important. The following table reports the overall rankings of the cameras as published by some of the major camera review sites. You can find the full text of the reviews, respectively, at cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.

Review scores
Camera camera
labs
.com
dp
review
.com
ephoto
zine
.com
imaging
resource
.com
photography
blog
.com
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Canon 70D (⇒ rgt) HiRec 83/100 Gold 4.5/5 4.5/5 5/5 2013 1,199discont. check
Sony A77 II (⇒ lft) - 80/100 Silver 4.5/5 4/5 5/5 2014 1,199 latest check
Canon 80D (⇒ lft | rgt) HiRec 84/100 Silver 4.5/5 4.5/5 4.5/5 2016 1,199 latest check
Canon G3 X (⇒ lft | rgt) Rec - 4.5/5 3.5/5 4/5 2015 999 latest check
Canon 7D II (⇒ lft | rgt) Rec 84/100 Silver 4/5 5/5 4.5/5 2014 1,799 latest check
Canon T5i (⇒ lft | rgt) - 76/100 Silver 4.5/5 4.5/5 4.5/5 2013 649discont. check
Canon 6D (⇒ lft | rgt) HiRec 83/100 Silver 4.5/5 4.5/5 4.5/5 2012 2,099discont. check
Canon 60D (⇒ lft | rgt) 87/100 Rec 79/100 Silver 4/5 5/5 4.5/5 2010 1,399discont. check
Canon 7D (⇒ lft | rgt) 93/100 HiRec 84/100 4.5/5 5/5 4.5/5 2009 1,699discont. check
Canon 50D (⇒ lft | rgt) 90/100 HiRec HiRec 4.5/5 5/5 4.5/5 2008 1,299discont. check
Nikon D7200 (⇒ lft | rgt) HiRec 84/100 Silver 4.5/5 4/5 4.5/5 2015 1,199discont. check
Nikon D7100 (⇒ lft | rgt) HiRec 85/100 Gold 4.5/5 5/5 4.5/5 2013 1,199discont. check
Panasonic GX8 (⇒ lft | rgt) Rec 82/100 Silver 4.5/5 5/5 4.5/5 2015 1,199discont. check
Sony A9 (⇒ lft | rgt) HiRec 89/100 Gold 5/5 5/5 5/5 2017 4,499 latest check
Sony A7 II (⇒ lft | rgt) Rec 82/100 Silver 4.5/5 5/5 5/5 2014 1,999discont. check
Sony RX10 (⇒ lft | rgt) Rec 80/100 Gold 4.5/5 4.5/5 4.5/5 2013 1,299discont. check
Sony A77 (⇒ lft | rgt) 91/100 81/100 Silver - 4.5/5 5/5 2011 1,999discont. check

Care should be taken when interpreting the review scores above, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. It should also be noted that some of the review sites have over time altered the way they render their verdicts.


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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting. If the camera you are interested in is not available, please send me an email, and I will try to add information on that model to the database.

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