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Canon 550D vs Sony A7 III

The Canon EOS 550D (called Canon T2i in some regions) and the Sony Alpha A7 III are two digital cameras that were officially introduced, respectively, in February 2010 and February 2018. The 550D is a DSLR, while the A7 III is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (550D) and a full frame (A7 III) sensor. The Canon has a resolution of 17.9 megapixels, whereas the Sony provides 24 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Canon 550D   Sony A7 III
Canon 550D Sony A7 III
Digital single lens reflex Mirrorless system camera
Canon EF mount lenses Sony E mount lenses
17.9 MP, APS-C Sensor 24 MP, Full Frame Sensor
1080/30p Video 4K/30p Video
ISO 100-6400 (100-12800) ISO 100-51200 (50-204800)
Optical viewfinder Electronic viewfinder (2359k dots)
3.0" LCD, 1040k dots 3.0" LCD, 922k dots
Fixed screen (not touch-sensitive) Tilting touchscreen
3.7 shutter flaps per second 10 shutter flaps per second
Lens stabilization onlyIn-body stabilization
Not weather sealedWeathersealed body
440 shots per battery charge610 shots per battery charge
129 x 98 x 62 mm, 530 g 127 x 96 x 74 mm, 650 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 550D and the Sony Alpha A7 III? 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: Canon 550D vs Sony A7 III

The physical size and weight of the Canon 550D and the Sony A7 III are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. 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.

Size Canon 550D vs Sony A7 III
Compare 550D versus A7 III top
Comparison 550D or A7 III rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7 III is somewhat smaller (4 percent) than the Canon 550D. However, the A7 III is markedly heavier (23 percent) than the 550D. It is noteworthy in this context that the A7 III is splash and dust-proof, while the 550D 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 compare the optics available for the two cameras in the Canon EF Lens Catalog (550D) and the Sony FE Lens Catalog (A7 III). Mirrorless cameras, such as the A7 III, 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.

Concerning battery life, the 550D gets 440 shots out of its LP-E8 battery, while the A7 III can take 610 images on a single charge of its NP-FZ100 power pack. The power pack in the A7 III can be charged via the USB port, which can be very convenient when travelling.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you would like to visualize and compare a different camera combination, just use the right or left arrows in the table to switch to the respective camera. Alternatively, you can also navigate to the CAM-parator app and make your selection from the full list of cameras there.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Canon 550D» 5.1 in 3.9 in 2.4 in 18.7 oz 440 n Feb 2010 699- i Canon 550D
 
Sony A7 III« 5.0 in 3.8 in 2.9 in 22.9 oz 610 Y Feb 2018 1,999 i i Sony A7 III
 
Canon 4000D« » 5.1 in 4.0 in 3.0 in 15.4 oz 500 n Feb 2018 399 i i Canon 4000D
 
Canon 750D« » 5.2 in 4.0 in 3.1 in 19.6 oz 440 n Feb 2015 749- i Canon 750D
 
Canon 760D« » 5.2 in 4.0 in 3.1 in 19.9 oz 440 n Feb 2015 649- i Canon 760D
 
Canon 1200D« » 5.1 in 3.9 in 3.1 in 16.9 oz 500 n Feb 2014 449- i Canon 1200D
 
Canon 700D« » 5.2 in 3.9 in 3.1 in 20.5 oz 440 n Mar 2013 649- i Canon 700D
 
Canon 650D« » 5.2 in 3.9 in 3.1 in 20.3 oz 440 n Jun 2012 849- i Canon 650D
 
Canon 600D« » 5.2 in 3.9 in 3.1 in 20.1 oz 440 n Feb 2011 599- i Canon 600D
 
Canon 1100D« » 5.1 in 3.9 in 3.1 in 17.5 oz 700 n Feb 2011 449- i Canon 1100D
 
Canon 500D« » 5.1 in 3.9 in 2.4 in 18.3 oz 400 n Mar 2009 799- i Canon 500D
 
Nikon D5100« » 5.0 in 3.8 in 3.1 in 19.8 oz 660 n Apr 2011 749- i Nikon D5100
 
Sony A9« » 5.0 in 3.8 in 2.5 in 23.7 oz 650 Y Apr 2017 4,499 i i Sony A9
 
Sony A7R II« » 5.0 in 3.8 in 2.4 in 22.0 oz 290 Y Jun 2015 3,199- i Sony A7R II
 
Sony A7S II« » 5.0 in 3.8 in 2.4 in 22.1 oz 370 Y Sep 2015 2,999 i i Sony A7S II
 
Sony A7 II« » 5.0 in 3.8 in 2.4 in 21.1 oz 350 Y Nov 2014 1,999- i Sony A7 II
 
Sony A7« » 5.0 in 3.7 in 1.9 in 16.7 oz 340 Y Oct 2013 1,699- i Sony A7
Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.

Any camera decision will obviously take relative prices into account. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The 550D was launched at a markedly lower price (by 65 percent) than the A7 III, 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: Canon 550D vs Sony A7 III

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. 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.

Of the two cameras under consideration, the Canon 550D features an APS-C sensor and the Sony A7 III a full frame sensor. The sensor area in the A7 III is 155 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.

Canon 550D and Sony A7 III sensor measures

With 24MP, the A7 III offers a higher resolution than the 550D (17.9MP), but the A7 III nevertheless has larger individual pixels (pixel pitch of 5.94μm versus 4.31μm for the 550D) due to its larger sensor. Moreover, the A7 III is a much more recent model (by 8 years) than the 550D, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the A7 III has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Sony A7 III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7 III for good quality output (200 dots per inch) amounts to 30 x 20 inch or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inch or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inch or 50.8 x 33.9 cm. The corresponding values for the Canon 550D are 25.9 x 17.3 inch or 65.8 x 43.9 cm for good quality, 20.7 x 13.8 inch or 52.7 x 35.1 cm for very good quality, and 17.3 x 11.5 inch or 43.9 x 29.3 cm for excellent quality prints.

The A7 III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Canon EOS 550D has a native sensitivity range from ISO 100 to ISO 6400, which can be extended to ISO 100-12800. The corresponding ISO settings for the Sony Alpha A7 III are ISO 100 to ISO 51200, with the possibility to increase the ISO range to 50-204800.

550D versus A7 III MP

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 A7 III offers substantially better image quality than the 550D (overall score 30 points higher). The advantage is based on 2.9 bits higher color depth, 3.2 EV in additional dynamic range, and 2.3 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
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
 
Canon 550D» APS-C 17.9 5184 34561080/30p22.111.578466Canon 550D
 
Sony A7 III« Full Frame 24.0 6000 40004K/30p25.014.7373096Sony A7 III
 
Canon 4000D« » APS-C 17.9 5184 34561080/30p21.911.469563Canon 4000D
 
Canon 750D« » APS-C 24.0 6000 40001080/60p22.712.091971Canon 750D
 
Canon 760D« » APS-C 24.0 6000 40001080/30p22.612.091570Canon 760D
 
Canon 1200D« » APS-C 17.9 5184 34561080/30p21.911.372463Canon 1200D
 
Canon 700D« » APS-C 17.9 5184 34561080/30p21.711.268161Canon 700D
 
Canon 650D« » APS-C 17.9 5184 34561080/30p21.711.272262Canon 650D
 
Canon 600D« » APS-C 17.9 5184 34561080/30p22.111.579365Canon 600D
 
Canon 1100D« » APS-C 12.2 4272 2848720/30p21.911.075562Canon 1100D
 
Canon 500D« » APS-C 15.1 4752 31681080/20p21.711.566363Canon 500D
 
Nikon D5100« » APS-C 16.1 4928 32641080/30p23.513.6118380Nikon D5100
 
Sony A9« » Full Frame 24.0 6000 40004K/30p24.913.3351792Sony A9
 
Sony A7R II« » Full Frame 42.2 7952 53044K/30p26.013.9343498Sony A7R II
 
Sony A7S II« » Full Frame 12.0 4240 28324K/30p23.613.3299385Sony A7S II
 
Sony A7 II« » Full Frame 24.0 6000 40001080/60p24.913.6244990Sony A7 II
 
Sony A7« » Full Frame 24.0 6000 40001080/60p24.814.2224890Sony A7

Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the A7 III provides a better video resolution than the 550D. It can shoot movie footage at 4K/30p, while the Canon is limited to 1080/30p.

 

Feature comparison: Canon 550D vs Sony A7 III

Beyond body and sensor, cameras can and do differ across a range of features. For example, the A7 III has an electronic viewfinder (2359k dots), while the 550D 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 viewfinder in the A7 III offers a wider field of view (100%) than the one in the 550D (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the A7 III has a higher magnification (0.78x vs 0.54x), 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 550D and Sony A7 III along with similar information for a selection of comparators.

Core Features
  Camera
Model
Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
Camera
Model
 
Canon 550D»optical n 3.0 1040 fixed n 1/4000s 3.7 Y n Canon 550D
 
Sony A7 III«2359 n 3.0 922 tilting Y 1/8000s 10.0 n Y Sony A7 III
 
Canon 4000D« »optical n 2.7 230 fixed n 1/4000s 3.0 Y n Canon 4000D
 
Canon 750D« »optical n 3.0 1040 swivel Y 1/4000s 5.0 Y n Canon 750D
 
Canon 760D« »optical Y 3.0 1040 swivel Y 1/4000s 5.0 Y n Canon 760D
 
Canon 1200D« »optical n 3.0 460 fixed n 1/4000s 3.0 Y n Canon 1200D
 
Canon 700D« »optical n 3.0 1040 swivel Y 1/4000s 5.0 Y n Canon 700D
 
Canon 650D« »optical n 3.0 1040 swivel Y 1/4000s 5.0 Y n Canon 650D
 
Canon 600D« »optical n 3.0 1040 swivel n 1/4000s 3.7 Y n Canon 600D
 
Canon 1100D« »optical n 2.7 230 fixed n 1/4000s 3.0 Y n Canon 1100D
 
Canon 500D« »optical n 3.0 920 fixed n 1/4000s 3.4 Y n Canon 500D
 
Nikon D5100« »optical n 3.0 921 swivel n 1/4000s 4.0 Y n Nikon D5100
 
Sony A9« »3686 n 3.0 1440 tilting Y 1/8000s 20.0 n Y Sony A9
 
Sony A7R II« »2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y Sony A7R II
 
Sony A7S II« »2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y Sony A7S II
 
Sony A7 II« »2400 n 3.0 1230 tilting n 1/8000s 5.0 n Y Sony A7 II
 
Sony A7« »2400 n 3.0 1230 tilting n 1/8000s 5.0 n n Sony A7

One difference between the cameras concerns the presence of an on-board flash. The 550D has one, while the A7 III does not. While the built-in flash of the 550D is not very powerful, it can at times be useful as a fill-in light.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the A7 III is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The Sony A7 III has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

The 550D writes its imaging data to SDXC cards, while the A7 III uses SDXC or Memory Stick PRO Duo cards. The A7 III features dual card slots, which can be very useful in case a memory card fails. In contrast, the 550D only has one slot. The A7 III supports UHS-II cards on its first slot and UHS-I on its second one, while the 550D cannot take advantage of Ultra High Speed SD cards.

 

Connectivity comparison: Canon 550D vs Sony A7 III

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 550D and Sony Alpha A7 III 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
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
 
Canon 550D»Ystereo-Y-mini2.0---Canon 550D
 
Sony A7 III«YstereomonoYYmicro3.1YYYSony A7 III
 
Canon 4000D« »Ymonomono--mini2.0YY-Canon 4000D
 
Canon 750D« »YstereomonoY-mini2.0YY-Canon 750D
 
Canon 760D« »YstereomonoY-mini2.0YY-Canon 760D
 
Canon 1200D« »Ymonomono--mini2.0---Canon 1200D
 
Canon 700D« »YstereomonoY-mini2.0---Canon 700D
 
Canon 650D« »YstereomonoY-mini2.0---Canon 650D
 
Canon 600D« »YmonomonoY-mini2.0---Canon 600D
 
Canon 1100D« »Ystereomono--mini2.0---Canon 1100D
 
Canon 500D« »Ymonomono--mini2.0---Canon 500D
 
Nikon D5100« »YmonomonoY-mini2.0---Nikon D5100
 
Sony A9« »YstereomonoYYmicro2.0YYYSony A9
 
Sony A7R II« »YstereomonoYYmicro2.0YY-Sony A7R II
 
Sony A7S II« »YstereomonoYYmicro2.0YY-Sony A7S II
 
Sony A7 II« »YstereomonoYYmicro2.0YY-Sony A7 II
 
Sony A7« »YstereomonoYYmicro2.0YY-Sony A7

It is notable that the A7 III offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the 550D does not offer wifi capability.

The A7 III is a recent model that features in the current product line-up of Sony. In contrast, the 550D has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the 550D was succeeded by the Canon 600D. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon and Sony websites.


Review summary: Canon 550D vs Sony A7 III

So how do things add up? Which of the two cameras – the Canon 550D or the Sony A7 III – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.

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Arguments in favor of the Canon EOS 550D:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • More detailed LCD: Has a higher resolution rear screen (1040k vs 922k dots).
  • Less heavy: Is lighter (by 120g or 18 percent) and hence easier to carry around.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More affordable: Was introduced into a lower priced category (65 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in February 2010).

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Advantages of the Sony Alpha A7 III:

  • More detail: Has more megapixels (24 vs 17.9MP), which boosts linear resolution by 16%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores substantially higher (30 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (2.9 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (3.2 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (2.3 stops ISO advantage).
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/30p).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • More complete view: Has a viewfinder with a larger field of view (100% vs 95%).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.54x).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (10 vs 3.7 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • Longer lasting: Gets more shots (610 versus 440) out of a single battery charge.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • Faster buffer clearing: Supports Ultra High Speed (UHS-II and UHS-I) SDXC cards.
  • More modern: Reflects 8 years of technical progress since the 550D launch.

If the number of relative strengths (bullet points above) is taken as a guide, the A7 III is the clear winner of the contest (29 : 7 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 wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

550D 07:29 A7 III

How about other alternatives? Do the specifications of the Canon 550D and the Sony A7 III place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings 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 550D or the A7 III. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.

Expert reviews: Canon 550D vs Sony A7 III

This is why expert reviews are important. The adjacent summary-table relays the overall verdicts of several of the most popular camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Canon 550D»+ +77/1004/55/54.5/5 Feb 2010 699- i Canon 550D
 
Sony A7 III«+ +89/1005/55/55/5 Feb 2018 1,999 i i Sony A7 III
 
Canon 4000D« »o-3.5/5-3.5/5 Feb 2018 399 i i Canon 4000D
 
Canon 750D« »-75/1004.5/54.5/54.5/5 Feb 2015 749- i Canon 750D
 
Canon 760D« »+77/1004.5/54.5/54.5/5 Feb 2015 649- i Canon 760D
 
Canon 1200D« »+-4/54/54.5/5 Feb 2014 449- i Canon 1200D
 
Canon 700D« »-76/1004.5/54.5/54.5/5 Mar 2013 649- i Canon 700D
 
Canon 650D« »+ +77/1004.5/54.5/54.5/5 Jun 2012 849- i Canon 650D
 
Canon 600D« »o77/1004.5/55/54.5/5 Feb 2011 599- i Canon 600D
 
Canon 1100D« »80/10069/1004/54/54.5/5 Feb 2011 449- i Canon 1100D
 
Canon 500D« »+ +74/1004.5/55/54.5/5 Mar 2009 799- i Canon 500D
 
Nikon D5100« »+ +76/1004.5/55/54.5/5 Apr 2011 749- i Nikon D5100
 
Sony A9« »+ +89/1005/55/55/5 Apr 2017 4,499 i i Sony A9
 
Sony A7R II« »+ +90/1005/54.5/55/5 Jun 2015 3,199- i Sony A7R II
 
Sony A7S II« »+-4.5/55/55/5 Sep 2015 2,999 i i Sony A7S II
 
Sony A7 II« »+82/1004.5/55/55/5 Nov 2014 1,999- i Sony A7 II
 
Sony A7« »+ +80/1005/54.5/55/5 Oct 2013 1,699- i Sony A7
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (-) not available.

The review scores listed above should be treated with care, though. The ratings are only valid when referring 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 comparisons of ratings among very different cameras or across long time periods have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

Canon 550D:
Check Ebay offers
Sony A7 III:
Check Amazon price

Other camera comparisons

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    Specifications: Canon 550D vs Sony A7 III

    Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.

    Camera Specifications
    Camera Model Canon 550D Sony A7 III
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Canon EF mount lenses Sony E mount lenses
    Launch Date February 2010 February 2018
    Launch Price USD 699 USD 1999
    Sensor Specs Canon 550D Sony A7 III
    Sensor Technology CMOS BSI-CMOS
    Sensor Format APS-C Sensor Full Frame Sensor
    Sensor Size 22.3 x 14.9 mm 35.6 x 23.8 mm
    Sensor Area 332.27 mm2 847.28 mm2
    Sensor Diagonal 26.8 mm 42.8 mm
    Crop Factor 1.6x 1.0x
    Sensor Resolution 17.9 Megapixels 24 Megapixels
    Image Resolution 5184 x 3456 pixels 6000 x 4000 pixels
    Pixel Pitch 4.31 μm 5.94 μm
    Pixel Density 5.39 MP/cm2 2.83 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 1080/30p Video 4K/30p Video
    ISO Setting 100-6400 ISO 100-51200 ISO
    ISO Boost 100-12800 ISO 50-204800 ISO
    Image Processor DIGIC 4 BIONZ X
    DXO Sensor Quality (score) 66 96
    DXO Color Depth (bits) 22.1 25.0
    DXO Dynamic Range (EV) 11.5 14.7
    DXO Low Light (ISO) 784 3730
    Screen Specs Canon 550D Sony A7 III
    Viewfinder Type Optical viewfinder Electronic viewfinder
    Viewfinder Field of View 95% 100%
    Viewfinder Magnification 0.54x 0.78x
    Viewfinder Resolution 2359k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0 inch 3.0 inch
    LCD Resolution 1040k dots 922k dots
    LCD Attachment Fixed screen Tilting screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Canon 550D Sony A7 III
    Autofocus System Phase-detect AF On-Sensor Phase-detect
    Manual Focusing AidNo Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000/s 1/8000/s
    Continuous Shooting 3.7 shutter flaps/s 10 shutter flaps/s
    Shutter Life Expectancy100 000 actuations200 000 actuations
    Electronic Shutterno E-ShutterYES
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Build-in Flash no On-Board Flash
    Storage Medium SDXC cards MS or SDXC cards
    Second Storage Option Single card slot Dual card slots
    UHS card support no Single UHS-II
    Connectivity Specs Canon 550D Sony A7 III
    External Flash Hotshoe Hotshoe
    USB Connector USB 2.0 USB 3.1
    HDMI Port mini HDMI micro HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket no Headphone port Headphone port
    Wifi Support no Wifi Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Bluetooth Support no Bluetooth Bluetooth built-in
    Body Specs Canon 550D Sony A7 III
    Environmental SealingNot weather sealedWeathersealed body
    Battery Type LP-E8 power pack NP-FZ100 power pack
    Battery Life (CIPA)440 shots per charge610 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 129 x 98 x 62 mm
    (5.1 x 3.9 x 2.4 in)
    127 x 96 x 74 mm
    (5.0 x 3.8 x 2.9 in)
    Camera Weight 530 g (18.7 oz) 650 g (22.9 oz)

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