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Canon 20D versus Canon T6i

The Canon EOS 20D and the Canon EOS Rebel T6i (labelled Canon 750D in some countries) are two digital cameras that were revealed to the public, respectively, in August 2004 and February 2015. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The 20D has a resolution of 8.2 megapixel, whereas the T6i 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 20D vs Canon T6i

The side-by-side display below illustrates the physical size and weight of the Canon 20D and the Canon T6i. 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. You can also use the toggle button 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 – the 20D – represents the basis or 100 percent across all the size and weight measures).

Compare Canon 20D vs Canon T6i
20D versus T6i top view
20D and T6i rear side
Body view (20D on the left)

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon T6i is notably smaller (13 percent) than the Canon 20D. Moreover, the T6i is markedly lighter (28 percent) than the 20D. In this context, it is worth noting that neither the 20D nor the T6i 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 find an overview of suitable optics in the Canon EF Lens Catalog.

Concerning battery life, the 20D gets 700 shots out of its BP-511A battery, while the T6i can take 440 images on a single charge of its LP-E17 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 20D (⇒ rgt) 144 mm 106 mm 72 mm 770 g 700 no 2004 1,499discont. check
Canon T6i (⇒ lft) 132 mm 101 mm 78 mm 555 g 440 no 2015 749discont. check
Canon T7i (⇒ lft | rgt) 131 mm 100 mm 76 mm 532 g 600 no 2017 749 latest check
Canon M3 (⇒ lft | rgt) 111 mm 68 mm 44 mm 366 g 250 no 2015 679discont. check
Canon T6s (⇒ lft | rgt) 132 mm 101 mm 78 mm 565 g 440 no 2015 849discont. check
Canon 7D II (⇒ lft | rgt) 149 mm 112 mm 78 mm 910 g 670 YES 2014 1,799 latest check
Canon G7 X (⇒ lft | rgt) 103 mm 60 mm 40 mm 304 g 210 no 2014 699discont. check
Canon T5i (⇒ lft | rgt) 133 mm 100 mm 79 mm 580 g 440 no 2013 649discont. 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
Canon 40D (⇒ lft | rgt) 146 mm 108 mm 74 mm 822 g 750 no 2007 1,299discont. check
Canon 30D (⇒ lft | rgt) 144 mm 106 mm 74 mm 785 g 750 no 2006 1,399discont. check
Canon 350D (⇒ lft | rgt) 127 mm 94 mm 64 mm 540 g 400 no 2005 899discont. check
Canon 10D (⇒ lft | rgt) 150 mm 107 mm 75 mm 850 g 500 no 2003 1,999discont. check
Canon 300D (⇒ lft | rgt) 142 mm 99 mm 72 mm 649 g 400 no 2003 899discont. check
Nikon D200 (⇒ lft | rgt) 147 mm 113 mm 74 mm 920 g 400 YES 2005 1,699discont. 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 T6i was launched at a markedly lower price (by 50 percent) than the 20D, 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.


Sensor comparison: Canon 20D vs Canon T6i

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. 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 are more costly to manufacture and tend to 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 T6i is 2 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.

Canon 20D and Canon T6i sensor measures
Sensor size

Despite having a slightly smaller sensor, the T6i offers a higher resolution of 24 megapixel, compared with 8.2 MP of the 20D. This megapixel advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.72μm versus 6.42μm for the 20D). However, it should be noted that the T6i is much more recent (by 10 years and 5 months) than the 20D, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.

20D versus T6i MP
Sensor resolution

For most cameras, data on sensor performance has been reported by DXO Mark. 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 T6i has a markedly higher DXO score than the 20D (overall score 9 points higher), which will translate into better image quality. The advantage is based on 0.8 bits higher color depth, 1 EV in additional dynamic range, and 0.4 stops in additional low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

Sensor Characteristics
Camera Sensor
Class
Resolution
(Megapixel)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Canon 20D (⇒ rgt) APS-C 8.2 3504 2336 no 21.9 11.0 721 62
Canon T6i (⇒ lft) APS-C 24.0 6000 4000 1080/60p 22.7 12.0 919 71
Canon T7i (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p .. .. .. ..
Canon M3 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/30p 22.8 11.8 1169 72
Canon T6s (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/30p 22.6 12.0 915 70
Canon 7D II (⇒ lft | rgt) APS-C 20.0 5472 3648 1080/60p 22.4 11.8 1082 70
Canon G7 X (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 23.0 12.7 556 71
Canon T5i (⇒ lft | rgt) APS-C 17.9 5184 3456 1080/30p 21.7 11.2 681 61
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
Canon 40D (⇒ lft | rgt) APS-C 10.1 3888 2592 no 22.1 11.3 703 64
Canon 30D (⇒ lft | rgt) APS-C 8.2 3504 2336 no 21.5 10.8 736 59
Canon 350D (⇒ lft | rgt) APS-C 8.0 3456 2304 no 21.8 10.8 637 60
Canon 10D (⇒ lft | rgt) APS-C 6.3 3072 2048 no 21.1 10.9 571 57
Canon 300D (⇒ lft | rgt) APS-C 6.3 3072 2048 no 21.0 10.8 544 55
Nikon D200 (⇒ lft | rgt) APS-C 10.0 3872 2592 no 22.3 11.5 583 64

Many modern cameras are not only capable of taking still images, but can also record movies. The T6i indeed provides for movie recording, while the 20D does not. The highest resolution format that the T6i can use is 1080/60p.

Feature comparison: Canon 20D vs Canon T6i

Apart from body and sensor, cameras can and do differ across a variety of features. The 20D and the T6i 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 following table reports on some other key feature differences and similarities of the Canon 20D, the Canon T6i, and comparable cameras. If you need more detail on the specs, you can find comprehensive listings, for example, in the dpreview camera hub.

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 20D (⇒ rgt) optical YES 1.8 118 fixed no 8000 5.0 13 no
Canon T6i (⇒ lft) optical no 3.0 1040 swivel YES 4000 5.0 12 no
Canon T7i (⇒ lft | rgt) optical no 3.0 1040 swivel YES 4000 6.0 12 no
Canon M3 (⇒ lft | rgt) no no 3.0 1040 tilting YES 4000 4.2 5 no
Canon T6s (⇒ lft | rgt) optical YES 3.0 1040 swivel YES 4000 5.0 12 no
Canon 7D II (⇒ lft | rgt) optical YES 3.0 1040 fixed no 8000 10.0 11 no
Canon G7 X (⇒ lft | rgt) no no 3.0 1040 tilting YES 2000 6.5 7 YES
Canon T5i (⇒ lft | rgt) optical no 3.0 1040 swivel YES 4000 5.0 13 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
Canon 40D (⇒ lft | rgt) optical YES 3.0 230 fixed no 8000 6.5 12 no
Canon 30D (⇒ lft | rgt) optical YES 2.5 230 fixed no 8000 5.0 13 no
Canon 350D (⇒ lft | rgt) optical no 1.8 115 fixed no 4000 3.0 YES no
Canon 10D (⇒ lft | rgt) optical YES 1.8 118 fixed no 4000 3.0 13 no
Canon 300D (⇒ lft | rgt) optical no 1.8 118 fixed no 4000 2.5 YES no
Nikon D200 (⇒ lft | rgt) optical YES 2.5 230 fixed no 8000 5.0 12 no

Both the 20D and the T6i have been discontinued, but can regularly be found used on eBay. The 20D was replaced by the Canon 30D, while the T6i was followed by the Canon T7i.

Review summary: Canon 20D vs Canon T6i

So what conclusions can be drawn? Is there a clear favorite between the Canon 20D and the Canon T6i? A synthesis of the relative strong points of each of the models is listed below.


Arguments in favor of the Canon EOS 20D:

  • Easier setting verification: Has an LCD display on top to control shooting parameters.
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
  • Longer lasting: Can take more shots (700 versus 440) on a single battery charge.
  • More heavily discounted: Has been available for much longer (launched in August 2004).

Reasons to prefer the Canon EOS Rebel T6i:

  • More detail: Has more megapixels (24 vs 8.2MP), which boosts linear resolution by 71%.
  • Better image quality: Scores markedly higher (9 points) in the DXO overall evaluation.
  • More dynamic range: Captures a broader range of light and dark details (1 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (0.4 stops ISO advantage).
  • Broader imaging potential: Can capture not only stills but also 1080/60p 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 swivel screen for odd-angle shots in portrait or landscape orientation.
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • More compact: Is smaller (132x101mm vs 144x106mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 215g or 28 percent) and is thus easier to take along.
  • More affordable: Was introduced into a lower priced category (50 percent cheaper at launch).
  • More modern: Reflects 10 years and 5 months of technical progress since the 20D launch.

If the number of relative strengths (bullet points above) is taken as a guide, the T6i is the clear winner of the contest (13 : 4 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.

20D 04:13 T6i

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains partial and cannot reveal, for example, the handling experience and imaging performance when actually working with the 20D or the T6i. 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. This is where reviews by experts come in. 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.

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 20D (⇒ rgt) - HiRec - reviewed - 2004 1,499discont. check
Canon T6i (⇒ lft) - 75/100 4.5/5 4.5/5 4.5/5 2015 749discont. check
Canon T7i (⇒ lft | rgt) .. 80/100 Gold 4.5/5 4/5 4/5 2017 749 latest check
Canon M3 (⇒ lft | rgt) reviewed 75/100 4.5/5 4.5/5 4/5 2015 679discont. check
Canon T6s (⇒ lft | rgt) Rec 77/100 Silver 4.5/5 4.5/5 4.5/5 2015 849discont. check
Canon 7D II (⇒ lft | rgt) Rec 84/100 Silver 4/5 5/5 4.5/5 2014 1,799 latest check
Canon G7 X (⇒ lft | rgt) HiRec 77/100 Silver 4.5/5 3.5/5 4.5/5 2014 699discont. check
Canon T5i (⇒ lft | rgt) - 76/100 Silver 4.5/5 4.5/5 4.5/5 2013 649discont. 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
Canon 40D (⇒ lft | rgt) 90/100 HiRec HiRec 4.5/5 reviewed 4.5/5 2007 1,299discont. check
Canon 30D (⇒ lft | rgt) 87/100 HiRec HiRec reviewed reviewed - 2006 1,399discont. check
Canon 350D (⇒ lft | rgt) 80/100 HiRec reviewed reviewed - 2005 899discont. check
Canon 10D (⇒ lft | rgt) - HiRec - reviewed - 2003 1,999discont. check
Canon 300D (⇒ lft | rgt) - HiRec - reviewed - 2003 899discont. check
Nikon D200 (⇒ lft | rgt) 91/100 HiRec HiRec reviewed 5/5 - 2005 1,699discont. check

The above review scores should be interpreted with care, though. The ratings are only valid when refering to cameras in the same category and of the same age. Hence, a score should always be seen in the context of the camera's market launch date and its price, 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.


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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting. If you cannot find the camera you are interested in, kindly get in touch, and I will try to add information on that model to the database.

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