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Canon T3i vs Sony A7R III

The Canon EOS Rebel T3i (called Canon 600D in some regions) and the Sony Alpha A7R III are two digital cameras that were announced, respectively, in February 2011 and October 2017. The T3i is a DSLR, while the A7R III is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (T3i) and a full frame (A7R III) sensor. The Canon has a resolution of 17.9 megapixels, whereas the Sony provides 42.2 MP.

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

Headline Specifications
Canon T3i
versus
Sony A7R III
Canon T3i   Sony A7R III
Digital single lens reflex Mirrorless system camera
Canon EF mount lenses Sony E mount lenses
17.9 MP – APS-C sensor 42.2 MP – Full Frame sensor
1080/30p Video 4K/30p Video
ISO 100-6,400 (100 - 12,800) ISO 100-32,000 (50 - 102,400)
Optical viewfinder Electronic viewfinder (3686k dots)
3.0" LCD – 1040k dots 3.0" LCD – 1440k dots
Swivel 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 charge650 shots per battery charge
133 x 100 x 80 mm, 570 g 127 x 96 x 74 mm, 650 g
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Check T3i offers at
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Check A7R III offers at
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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS Rebel T3i and the Sony Alpha A7R 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.

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Body comparison

The physical size and weight of the Canon T3i and the Sony A7R III are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth measures are rounded to the nearest millimeter.

Size Canon T3i vs Sony A7R III
Compare T3i versus A7R III top
Comparison T3i or A7R III rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7R III is notably smaller (8 percent) than the Canon T3i. However, the A7R III is markedly heavier (14 percent) than the T3i. It is noteworthy in this context that the A7R III is splash and dust-proof, while the T3i 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 (T3i) and the Sony FE Lens Catalog (A7R III). Mirrorless cameras, such as the A7R 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 T3i gets 440 shots out of its Canon LP-E8 battery, while the A7R III can take 650 images on a single charge of its Sony NP-FZ100 power pack. The power pack in the A7R III can be charged via the USB port, which can be very convenient when travelling.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.

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Body Specifications
  empty Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price
Street
Price
1.
 
Canon T3i 133 mm 100 mm 80 mm 570 g 440 n Feb 2011 US$ 599ebay.com
2.
 
Sony A7R III 127 mm 96 mm 74 mm 650 g 650 Y Oct 2017 US$ 3 199ebay.com
3.
 
Canon M 109 mm 66 mm 32 mm 298 g 230 n Jul 2012 US$ 599ebay.com
4.
 
Canon SL1 117 mm 91 mm 69 mm 407 g 380 n Mar 2013 US$ 549ebay.com
5.
 
Canon T1i 129 mm 98 mm 62 mm 520 g 400 n Mar 2009 US$ 799ebay.com
6.
 
Canon T2i 129 mm 98 mm 62 mm 530 g 440 n Feb 2010 US$ 699ebay.com
7.
 
Canon T3 130 mm 100 mm 78 mm 495 g 700 n Feb 2011 US$ 449ebay.com
8.
 
Canon T4i 133 mm 100 mm 79 mm 575 g 440 n Jun 2012 US$ 849ebay.com
9.
 
Canon T5 130 mm 100 mm 78 mm 480 g 500 n Feb 2014 US$ 449ebay.com
10.
 
Canon T5i 133 mm 100 mm 79 mm 580 g 440 n Mar 2013 US$ 649ebay.com
11.
 
Canon T6 129 mm 101 mm 78 mm 485 g 500 n Mar 2016 US$ 449ebay.com
12.
 
Canon T6s 132 mm 101 mm 78 mm 565 g 440 n Feb 2015 US$ 649ebay.com
13.
 
Sony A7R II 127 mm 96 mm 60 mm 625 g 290 Y Jun 2015 US$ 3 199ebay.com
14.
 
Sony A7R IIIA 127 mm 96 mm 74 mm 650 g 650 Y Apr 2021 US$ 3 199 amazon.com
15.
 
Sony A7R IV 129 mm 96 mm 78 mm 665 g 670 Y Jul 2019 US$ 3 499ebay.com
16.
 
Sony A7S II 127 mm 96 mm 60 mm 627 g 370 Y Sep 2015 US$ 2 999ebay.com
17.
 
Sony A9 127 mm 96 mm 63 mm 673 g 650 Y Apr 2017 US$ 4 499ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or 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 T3i was launched at a markedly lower price (by 81 percent) than the A7R III, which puts it into a different market segment. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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

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. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the 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 T3i features an APS-C sensor and the Sony A7R III a full frame sensor. The sensor area in the A7R III is 160 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 T3i and Sony A7R III sensor measures

With 42.2MP, the A7R III offers a higher resolution than the T3i (17.9MP), but the A7R III nevertheless has larger individual pixels (pixel pitch of 4.52μm versus 4.31μm for the T3i) due to its larger sensor. Moreover, the A7R III is a much more recent model (by 6 years and 8 months) than the T3i, 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 A7R III has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Sony A7R III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7R III for good quality output (200 dots per inch) amounts to 39.8 x 26.5 inches or 101 x 67.4 cm, for very good quality (250 dpi) 31.8 x 21.2 inches or 80.8 x 53.9 cm, and for excellent quality (300 dpi) 26.5 x 17.7 inches or 67.3 x 44.9 cm. The corresponding values for the Canon T3i are 25.9 x 17.3 inches or 65.8 x 43.9 cm for good quality, 20.7 x 13.8 inches or 52.7 x 35.1 cm for very good quality, and 17.3 x 11.5 inches or 43.9 x 29.3 cm for excellent quality prints.

The A7R III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

Unlike the T3i, the A7R III has the capacity to capture high quality composite images by combining multiple shots after shifting its sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).

The Canon EOS Rebel T3i 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 A7R III are ISO 100 to ISO 32000, with the possibility to increase the ISO range to 50-102400.

In terms of underlying technology, the T3i is build around a CMOS sensor, while the A7R III uses a BSI-CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

T3i versus A7R III MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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"). Of the two cameras under consideration, the A7R III offers substantially better image quality than the T3i (overall score 35 points higher). The advantage is based on 3.9 bits higher color depth, 3.2 EV in additional dynamic range, and 2.2 stops in additional low light sensitivity. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

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Sensor Characteristics
  empty Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Canon T3i APS-C 17.9 5184 34561080/30p22.111.579365
2.
 
Sony A7R III Full Frame 42.2 7952 53044K/30p26.014.73523100
3.
 
Canon M APS-C 17.9 5184 34561080/30p22.111.282765
4.
 
Canon SL1 APS-C 17.9 5184 34561080/30p21.811.384363
5.
 
Canon T1i APS-C 15.1 4752 31681080/20p21.711.566363
6.
 
Canon T2i APS-C 17.9 5184 34561080/30p22.111.578466
7.
 
Canon T3 APS-C 12.2 4272 2848720/30p21.911.075562
8.
 
Canon T4i APS-C 17.9 5184 34561080/30p21.711.272262
9.
 
Canon T5 APS-C 17.9 5184 34561080/30p21.911.372463
10.
 
Canon T5i APS-C 17.9 5184 34561080/30p21.711.268161
11.
 
Canon T6 APS-C 17.9 5184 34561080/30p22.011.778166
12.
 
Canon T6s APS-C 24.0 6000 40001080/30p22.612.091570
13.
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
14.
 
Sony A7R IIIA Full Frame 42.2 7952 53044K/30p26.014.73523100
15.
 
Sony A7R IV Full Frame 60.2 9504 63364K/30p26.014.8334499
16.
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
17.
 
Sony A9 Full Frame 24.0 6000 40004K/30p24.913.3351792

Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the A7R III provides a better video resolution than the T3i. It can shoot movie footage at 4K/30p, while the Canon is limited to 1080/30p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the A7R III has an electronic viewfinder (3686k dots), while the T3i 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 A7R III offers a wider field of view (100%) than the one in the T3i (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the A7R III has a higher magnification (0.78x vs 0.53x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The table below summarizes some of the other core capabilities of the Canon T3i and Sony A7R III in connection with corresponding information for a sample of similar cameras.

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Core Features
  empty Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Canon T3ioptical n3.0 / 1040 swivel n 1/4000s 3.7/s Y n
2.
 
Sony A7R III3686 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
3.
 
Canon Mnone n3.0 / 1040 fixed Y 1/4000s 4.3/s n n
4.
 
Canon SL1optical n3.0 / 1040 fixed Y 1/4000s 4.9/s Y n
5.
 
Canon T1ioptical n3.0 / 920 fixed n 1/4000s 3.4/s Y n
6.
 
Canon T2ioptical n3.0 / 1040 fixed n 1/4000s 3.7/s Y n
7.
 
Canon T3optical n2.7 / 230 fixed n 1/4000s 3.0/s Y n
8.
 
Canon T4ioptical n3.0 / 1040 swivel Y 1/4000s 5.0/s Y n
9.
 
Canon T5optical n3.0 / 460 fixed n 1/4000s 3.0/s Y n
10.
 
Canon T5ioptical n3.0 / 1040 swivel Y 1/4000s 5.0/s Y n
11.
 
Canon T6optical n3.0 / 920 fixed n 1/4000s 3.0/s Y n
12.
 
Canon T6soptical Y3.0 / 1040 swivel Y 1/4000s 5.0/s Y n
13.
 
Sony A7R II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
14.
 
Sony A7R IIIA3686 n3.0 / 2340 tilting Y 1/8000s 10.0/s n Y
15.
 
Sony A7R IV5760 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
16.
 
Sony A7S II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
17.
 
Sony A93686 n3.0 / 1440 tilting Y 1/8000s 20.0/s n Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One difference between the cameras concerns the presence of an on-board flash. The T3i has one, while the A7R III does not. While the built-in flash of the T3i is not very powerful, it can at times be useful as a fill-in light.

The T3i has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the A7R III does not have a selfie-screen.

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 A7R 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 A7R 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 T3i writes its imaging data to SDXC cards, while the A7R III uses SDXC or Memory Stick PRO Duo cards. The A7R III features dual card slots, which can be very useful in case a memory card fails. In contrast, the T3i only has one slot. The A7R III supports UHS-II cards on its first slot and UHS-I on its second one, while the T3i cannot take advantage of Ultra High Speed SD cards.

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Connectivity comparison

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 Rebel T3i and Sony Alpha A7R III and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
  empty Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Canon T3iYmono / monoY-mini2.0---
2.
 
Sony A7R IIIYstereo / monoYYmicro3.1YYY
3.
 
Canon MYstereo / monoY-mini2.0---
4.
 
Canon SL1Ymono / monoY-mini2.0---
5.
 
Canon T1iYmono / mono--mini2.0---
6.
 
Canon T2iYstereo / -Y-mini2.0---
7.
 
Canon T3Ystereo / mono--mini2.0---
8.
 
Canon T4iYstereo / monoY-mini2.0---
9.
 
Canon T5Ymono / mono--mini2.0---
10.
 
Canon T5iYstereo / monoY-mini2.0---
11.
 
Canon T6Ymono / mono--mini2.0YY-
12.
 
Canon T6sYstereo / monoY-mini2.0YY-
13.
 
Sony A7R IIYstereo / monoYYmicro2.0YY-
14.
 
Sony A7R IIIAYstereo / monoYYmicro3.2YYY
15.
 
Sony A7R IVYstereo / monoYYmicro3.1YYY
16.
 
Sony A7S IIYstereo / monoYYmicro2.0YY-
17.
 
Sony A9Ystereo / monoYYmicro2.0YYY

It is notable that the A7R III offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the T3i does not provide wifi capability.

Studio photographers will appreciate that the Sony A7R III (unlike the T3i) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the T3i and the A7R III have been discontinued, but can regularly be found used on ebay. The T3i was replaced by the Canon T4i, while the A7R III was followed by the Sony A7R IV. Further information on the features and operation of the T3i and A7R III can be found, respectively, in the Canon T3i Manual (free pdf) or the online Sony A7R III Manual.

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Review summary

So what is the bottom line? Is there a clear favorite between the Canon T3i and the Sony A7R III? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

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Advantages of the Canon EOS Rebel T3i:

  • 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 flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Less heavy: Is lighter (by 80g or 12 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 (81 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in February 2011).

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Reasons to prefer the Sony Alpha A7R III:

  • More detail: Has more megapixels (42.2 vs 17.9MP), which boosts linear resolution by 53%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • High quality composites: Can combine several shots after pixel-shifting its sensor.
  • Better image quality: Scores substantially higher (35 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (3.9 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 (2.2 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 0.53x).
  • More detailed LCD: Has a higher resolution rear screen (1440k vs 1040k dots).
  • 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 (650 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.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • 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 6 years and 8 months of technical progress since the T3i launch.

If the count of relative strengths (bullet points above) is taken as a measure, the A7R III is the clear winner of the contest (32 : 8 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. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

T3i 08:32 A7R III

How about other alternatives? Do the specifications of the Canon T3i and the Sony A7R 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 specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the T3i or the A7R III 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.

Expert reviews

This is why hands-on reviews by experts are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). 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.

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Expert Camera Reviews
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price
Street
Price
1.
 
Canon T3i3/5o..77/1004.5/54.5/5 Feb 2011 US$ 599ebay.com
2.
 
Sony A7R III..+ +4/590/1004.5/55/5 Oct 2017 US$ 3 199ebay.com
3.
 
Canon M3/5+....4/54/5 Jul 2012 US$ 599ebay.com
4.
 
Canon SL14/5+..78/1004/54/5 Mar 2013 US$ 549ebay.com
5.
 
Canon T1i..+ +..74/1004.5/54.5/5 Mar 2009 US$ 799ebay.com
6.
 
Canon T2i..+ +..77/1004/54.5/5 Feb 2010 US$ 699ebay.com
7.
 
Canon T3..80/100..69/1004/54.5/5 Feb 2011 US$ 449ebay.com
8.
 
Canon T4i4/5+ +..77/1004.5/54.5/5 Jun 2012 US$ 849ebay.com
9.
 
Canon T53/5+....4/54.5/5 Feb 2014 US$ 449ebay.com
10.
 
Canon T5i......76/1004.5/54.5/5 Mar 2013 US$ 649ebay.com
11.
 
Canon T64/5o4/573/1004/54/5 Mar 2016 US$ 449ebay.com
12.
 
Canon T6s5/5+..77/1004.5/54.5/5 Feb 2015 US$ 649ebay.com
13.
 
Sony A7R II5/5+ +5/590/1005/55/5 Jun 2015 US$ 3 199ebay.com
14.
 
Sony A7R IIIA..+ +4/590/1004.5/55/5 Apr 2021 US$ 3 199 amazon.com
15.
 
Sony A7R IV5/5+4.5/591/1004.5/55/5 Jul 2019 US$ 3 499ebay.com
16.
 
Sony A7S II5/5+....4.5/55/5 Sep 2015 US$ 2 999ebay.com
17.
 
Sony A95/5+ +4.8/589/1005/55/5 Apr 2017 US$ 4 499ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated 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 comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

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Check T3i offers at
ebay.com
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Check A7R III offers at
ebay.com

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. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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    Specifications: Canon T3i vs Sony A7R 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 T3i Sony A7R III
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Canon EF mount lenses Sony E mount lenses
    Launch Date February 2011 October 2017
    Launch Price USD 599 USD 3,199
    Sensor Specs Canon T3i Sony A7R III
    Sensor Technology CMOS BSI-CMOS
    Sensor Format APS-C Sensor Full Frame Sensor
    Sensor Size 22.3 x 14.9 mm 35.9 x 24.0 mm
    Sensor Area 332.27 mm2 861.6 mm2
    Sensor Diagonal 26.8 mm 43.2 mm
    Crop Factor 1.6x 1.0x
    Sensor Resolution 17.9 Megapixels 42.2 Megapixels
    Image Resolution 5184 x 3456 pixels 7952 x 5304 pixels
    Pixel Pitch 4.31 μm 4.52 μm
    Pixel Density 5.39 MP/cm2 4.90 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 1080/30p Video 4K/30p Video
    ISO Setting 100 - 6,400 ISO 100 - 32,000 ISO
    ISO Boost 100 - 12,800 ISO 50 - 102,400 ISO
    Image Processor DIGIC 4 BIONZ X
    DXO Sensor Quality (score) 65 100
    DXO Color Depth (bits) 22.1 26.0
    DXO Dynamic Range (EV) 11.5 14.7
    DXO Low Light (ISO) 793 3523
    Screen Specs Canon T3i Sony A7R III
    Viewfinder Type Optical viewfinder Electronic viewfinder
    Viewfinder Field of View 95% 100%
    Viewfinder Magnification 0.53x 0.78x
    Viewfinder Resolution 3686k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1040k dots 1440k dots
    LCD Attachment Swivel screen Tilting screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Canon T3i Sony A7R III
    Focus System Phase-detect AF On-Sensor Phase-detect
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/8000s
    Continuous Shooting 3.7 shutter flaps/s 10 shutter flaps/s
    Shutter Life Expectancy100 000 actuations500 000 actuations
    Electronic Shutterno E-ShutterYES
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium SDXC cards MS or SDXC cards
    Single or Dual Card Slots Single card slot Dual card slots
    UHS card support no Single UHS-II
    Connectivity Specs Canon T3i Sony A7R III
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    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 T3i Sony A7R III
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Canon LP-E8 Sony NP-FZ100
    Battery Life (CIPA)440 shots per charge650 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 133 x 100 x 80 mm
    (5.2 x 3.9 x 3.1 in)
    127 x 96 x 74 mm
    (5.0 x 3.8 x 2.9 in)
    Camera Weight 570 g (20.1 oz) 650 g (22.9 oz)
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