Canon 77D vs Sony A7S
The Canon EOS 77D and the Sony Alpha A7S are two digital cameras that were officially introduced, respectively, in February 2017 and April 2014. The 77D is a DSLR, while the A7S is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (77D) and a full frame (A7S) sensor. The Canon has a resolution of 24 megapixels, whereas the Sony provides 12 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Canon 77D||Sony A7S|
|Digital single lens reflex||Mirrorless system camera|
|Canon EF mount lenses||Sony E mount lenses|
|24 MP, APS-C Sensor||12 MP, Full Frame Sensor|
|1080/60p Video||1080/60p Video|
|ISO 100-25600 (100-51200)||ISO 100-102400 (50-409600)|
|Optical viewfinder||Electronic viewfinder (2400k dots)|
|3.0" LCD, 1040k dots||3.0" LCD, 921k dots|
|Swivel touchscreen||Tilting screen (not touch-sensitive)|
|6 shutter flaps per second||5 shutter flaps per second|
|Not weather sealed||Weathersealed body|
|600 shots per battery charge||380 shots per battery charge|
|131 x 100 x 76 mm, 540 g||127 x 94 x 48 mm, 489 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 77D and the Sony Alpha A7S? 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.
The side-by-side display below illustrates the physical size and weight of the Canon 77D and the Sony A7S. 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.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7S is notably smaller (9 percent) than the Canon 77D. Moreover, the A7S is markedly lighter (9 percent) than the 77D. It is noteworthy in this context that the A7S is splash and dust-proof, while the 77D 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 (77D) and the Sony FE Lens Catalog (A7S). Mirrorless cameras, such as the A7S, 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 77D gets 600 shots out of its LP-E17 battery, while the A7S can take 380 images on a single charge of its NP-FW50 power pack. The power pack in the A7S 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, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.
|Canon 77D»||5.2 in||3.9 in||3.0 in||19.0 oz||600||n||Feb 2017||899||Canon 77D|
|Sony A7S«||5.0 in||3.7 in||1.9 in||17.2 oz||380||Y||Apr 2014||2,499||-||Sony A7S|
|Canon M50« »||4.6 in||3.5 in||2.3 in||13.8 oz||235||n||Feb 2018||779||Canon M50|
|Canon T7« »||5.1 in||4.0 in||3.1 in||16.8 oz||500||n||Feb 2018||449||Canon T7|
|Canon SL2« »||4.8 in||3.7 in||2.8 in||16.0 oz||650||n||Jun 2017||549||-||Canon SL2|
|Canon T7i« »||5.2 in||3.9 in||3.0 in||18.8 oz||600||n||Feb 2017||749||Canon T7i|
|Canon M5« »||4.6 in||3.5 in||2.4 in||15.1 oz||295||n||Sep 2016||979||Canon M5|
|Canon T6« »||5.1 in||4.0 in||3.1 in||17.1 oz||500||n||Mar 2016||449||-||Canon T6|
|Canon T6i« »||5.2 in||4.0 in||3.1 in||19.6 oz||440||n||Feb 2015||749||-||Canon T6i|
|Canon T6s« »||5.2 in||4.0 in||3.1 in||19.9 oz||440||n||Feb 2015||649||-||Canon T6s|
|Canon T4i« »||5.2 in||3.9 in||3.1 in||20.3 oz||440||n||Jun 2012||849||-||Canon T4i|
|Canon T3i« »||5.2 in||3.9 in||3.1 in||20.1 oz||440||n||Feb 2011||599||-||Canon T3i|
|Nikon Df« »||5.7 in||4.3 in||2.6 in||26.8 oz||1400||Y||Nov 2013||2,749||Nikon Df|
|Sony A7S II« »||5.0 in||3.8 in||2.4 in||22.1 oz||370||Y||Sep 2015||2,999||Sony A7S II|
|Sony A7 II« »||5.0 in||3.8 in||2.4 in||21.1 oz||350||Y||Nov 2014||1,999||-||Sony A7 II|
|Sony A7« »||5.0 in||3.7 in||1.9 in||16.7 oz||340||Y||Oct 2013||1,699||-||Sony A7|
|Sony A7R« »||5.0 in||3.7 in||1.9 in||16.4 oz||340||Y||Oct 2013||2,299||-||Sony A7R|
|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 77D was launched at a markedly lower price (by 64 percent) than the A7S, 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.
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. 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 associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Canon 77D features an APS-C sensor and the Sony A7S a full frame sensor. The sensor area in the A7S 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.
Despite having a smaller sensor, the Canon 77D offers a higher resolution of 24 megapixels, compared with 12 MP of the Sony A7S. This megapixels 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 8.45μm for the A7S). However, it should be noted that the 77D is much more recent (by 2 years and 10 months) than the A7S, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.
The resolution advantage of the Canon 77D implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 77D 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 Sony A7S are 21.2 x 14.2 inch or 53.8 x 36 cm for good quality, 17 x 11.3 inch or 43.1 x 28.8 cm for very good quality, and 14.1 x 9.4 inch or 35.9 x 24 cm for excellent quality prints.
The 77D has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
The Canon EOS 77D has a native sensitivity range from ISO 100 to ISO 25600, which can be extended to ISO 100-51200. The corresponding ISO settings for the Sony Alpha A7S are ISO 100 to ISO 102400, with the possibility to increase the ISO range to 50-409600.
For many 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 A7S has a markedly higher DXO score than the 77D (overall score 9 points higher), which will translate into better image quality. The advantage is based on 0.3 bits higher color depth, 0.1 EV of lower dynamic range, and 1.9 stops in additional low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
|Canon 77D»||APS-C||24.0||6000||4000||1080/60p||23.6||13.3||971||78||Canon 77D|
|Sony A7S«||Full Frame||12.0||4240||2832||1080/60p||23.9||13.2||3702||87||Sony A7S|
|Canon M50« »||APS-C||24.0||6000||4000||4K/24p||-||-||-||-||Canon M50|
|Canon T7« »||APS-C||24.0||6000||4000||1080/30p||-||-||-||-||Canon T7|
|Canon SL2« »||APS-C||24.0||6000||4000||1080/60p||23.6||13.4||1041||79||Canon SL2|
|Canon T7i« »||APS-C||24.0||6000||4000||1080/60p||-||-||-||-||Canon T7i|
|Canon M5« »||APS-C||24.0||6000||4000||1080/60p||23.4||12.4||1262||77||Canon M5|
|Canon T6« »||APS-C||17.9||5184||3456||1080/30p||-||-||-||-||Canon T6|
|Canon T6i« »||APS-C||24.0||6000||4000||1080/60p||22.7||12.0||919||71||Canon T6i|
|Canon T6s« »||APS-C||24.0||6000||4000||1080/30p||22.6||12.0||915||70||Canon T6s|
|Canon T4i« »||APS-C||17.9||5184||3456||1080/30p||21.7||11.2||722||62||Canon T4i|
|Canon T3i« »||APS-C||17.9||5184||3456||1080/30p||22.1||11.5||793||65||Canon T3i|
|Nikon Df« »||Full Frame||16.2||4928||3280||-||24.6||13.1||3279||89||Nikon Df|
|Sony A7S II« »||Full Frame||12.0||4240||2832||4K/30p||23.6||13.3||2993||85||Sony A7S II|
|Sony A7 II« »||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90||Sony A7 II|
|Sony A7« »||Full Frame||24.0||6000||4000||1080/60p||24.8||14.2||2248||90||Sony A7|
|Sony A7R« »||Full Frame||36.2||7360||4912||1080/60p||25.6||14.1||2746||95||Sony A7R|
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, and both provide the same movie specifications (1080/60p).
Apart from body and sensor, cameras can and do differ across a variety of features. For example, the A7S has an electronic viewfinder (2400k dots), while the 77D 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 A7S offers a wider field of view (100%) than the one in the 77D (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the A7S has a higher magnification (0.71x vs 0.51x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Canon 77D, the Sony A7S, and comparable cameras.
|Canon 77D»||optical||Y||3.0||1040||swivel||Y||1/4000s||6.0||Y||n||Canon 77D|
|Sony A7S«||2400||n||3.0||921||tilting||n||1/8000s||5.0||n||n||Sony A7S|
|Canon M50« »||2360||n||3.0||1040||swivel||Y||1/4000s||10.0||Y||n||Canon M50|
|Canon T7« »||optical||n||3.0||920||fixed||n||1/4000s||3.0||Y||n||Canon T7|
|Canon SL2« »||optical||n||3.0||1040||swivel||Y||1/4000s||5.0||Y||n||Canon SL2|
|Canon T7i« »||optical||n||3.0||1040||swivel||Y||1/4000s||6.0||Y||n||Canon T7i|
|Canon M5« »||2360||n||3.2||1620||tilting||Y||1/4000s||9.0||Y||n||Canon M5|
|Canon T6« »||optical||n||3.0||920||fixed||n||1/4000s||3.0||Y||n||Canon T6|
|Canon T6i« »||optical||n||3.0||1040||swivel||Y||1/4000s||5.0||Y||n||Canon T6i|
|Canon T6s« »||optical||Y||3.0||1040||swivel||Y||1/4000s||5.0||Y||n||Canon T6s|
|Canon T4i« »||optical||n||3.0||1040||swivel||Y||1/4000s||5.0||Y||n||Canon T4i|
|Canon T3i« »||optical||n||3.0||1040||swivel||n||1/4000s||3.7||Y||n||Canon T3i|
|Nikon Df« »||optical||Y||3.2||921||fixed||n||1/4000s||5.5||n||n||Nikon Df|
|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|
|Sony A7R« »||2400||n||3.0||1230||tilting||n||1/8000s||4.0||n||n||Sony A7R|
One difference between the cameras concerns the presence of an on-board flash. The 77D has one, while the A7S does not. While the built-in flash of the 77D is not very powerful, it can at times be useful as a fill-in light.The 77D 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 A7S 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 A7S 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 Canon 77D 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 77D writes its imaging data to SDXC cards, while the A7S uses SDXC or Memory Stick PRO Duo cards. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.
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 77D and Sony Alpha A7S and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Canon 77D»||Y||stereo||mono||Y||-||mini||2.0||Y||Y||Y||Canon 77D|
|Sony A7S«||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7S|
|Canon M50« »||Y||stereo||mono||Y||-||micro||2.0||Y||Y||Y||Canon M50|
|Canon T7« »||Y||mono||mono||-||-||mini||2.0||Y||Y||-||Canon T7|
|Canon SL2« »||Y||stereo||mono||Y||-||mini||2.0||Y||Y||Y||Canon SL2|
|Canon T7i« »||Y||stereo||mono||Y||-||mini||2.0||Y||Y||Y||Canon T7i|
|Canon M5« »||Y||stereo||mono||Y||-||mini||2.0||Y||Y||Y||Canon M5|
|Canon T6« »||Y||mono||mono||-||-||mini||2.0||Y||Y||-||Canon T6|
|Canon T6i« »||Y||stereo||mono||Y||-||mini||2.0||Y||Y||-||Canon T6i|
|Canon T6s« »||Y||stereo||mono||Y||-||mini||2.0||Y||Y||-||Canon T6s|
|Canon T4i« »||Y||stereo||mono||Y||-||mini||2.0||-||-||-||Canon T4i|
|Canon T3i« »||Y||mono||mono||Y||-||mini||2.0||-||-||-||Canon T3i|
|Nikon Df« »||Y||-||-||-||-||mini||2.0||-||-||-||Nikon Df|
|Sony A7S II« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7S II|
|Sony A7 II« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7 II|
|Sony A7« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7|
|Sony A7R« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7R|
It is notable that the A7S has a headphone jack, which makes it possible to attach external headphones and monitor the quality of sound during the recording process. The 77D lacks such a headphone port.
The 77D is a recent model that features in the current product line-up of Canon. In contrast, the A7S has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the A7S was succeeded by the Sony A7S II. 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.
So how do things add up? Which of the two cameras – the Canon 77D or the Sony A7S – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.
Reasons to prefer the Canon EOS 77D:
- More detail: Offers more megapixels (24 vs 12MP) with a 41% higher linear resolution.
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Easier setting verification: Features an LCD display on top to control shooting parameters.
- More detailed LCD: Has a higher resolution rear screen (1040k vs 921k dots).
- More flexible LCD: Has a 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.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Faster burst: Shoots at higher frequency (6 vs 5 flaps/sec) to capture the decisive moment.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- Longer lasting: Can take more shots (600 versus 380) on a single battery charge.
- Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- More affordable: Was introduced into a lower priced category (64 percent cheaper at launch).
- More modern: Reflects 2 years and 10 months of technical progress since the A7S launch.
Arguments in favor of the Sony Alpha A7S:
- Better image quality: Scores markedly higher (9 points) in the DXO overall evaluation.
- Better low-light sensitivity: Can shoot in dim conditions (1.9 stops ISO advantage).
- 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 (0.71x vs 0.51x).
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- Easier travel charging: Can be conveniently charged via its USB port.
- 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.
- More heavily discounted: Has been around for much longer (launched in April 2014).
If the count of relative strengths (bullet points above) is taken as a measure, the 77D is the clear winner of the match-up (15 : 11 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 wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.
How about other alternatives? Do the specifications of the Canon 77D and the Sony A7S 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 says little about, for example, the shooting experience and imaging performance of the 77D and the A7S in practical situations. 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.
This is where reviews by experts come in. 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.
|Canon 77D»||-||82/100||4.5/5||4.5/5||4/5||Feb 2017||899||Canon 77D|
|Sony A7S«||-||86/100||4.5/5||4.5/5||5/5||Apr 2014||2,499||-||Sony A7S|
|Canon M50« »||+||79/100||-||4/5||3.5/5||Feb 2018||779||Canon M50|
|Canon T7« »||o||-||3.5/5||-||3.5/5||Feb 2018||449||Canon T7|
|Canon SL2« »||+ +||78/100||4.5/5||4.5/5||4.5/5||Jun 2017||549||-||Canon SL2|
|Canon T7i« »||-||80/100||4.5/5||4/5||4/5||Feb 2017||749||Canon T7i|
|Canon M5« »||+||82/100||4/5||4.5/5||4/5||Sep 2016||979||Canon M5|
|Canon T6« »||o||73/100||4/5||3.5/5||4/5||Mar 2016||449||-||Canon T6|
|Canon T6i« »||-||75/100||4.5/5||4.5/5||4.5/5||Feb 2015||749||-||Canon T6i|
|Canon T6s« »||+||77/100||4.5/5||4.5/5||4.5/5||Feb 2015||649||-||Canon T6s|
|Canon T4i« »||+ +||77/100||4.5/5||4.5/5||4.5/5||Jun 2012||849||-||Canon T4i|
|Canon T3i« »||o||77/100||4.5/5||5/5||4.5/5||Feb 2011||599||-||Canon T3i|
|Nikon Df« »||-||81/100||4/5||4/5||4/5||Nov 2013||2,749||Nikon Df|
|Sony A7S II« »||+||-||4.5/5||5/5||5/5||Sep 2015||2,999||Sony A7S II|
|Sony A7 II« »||+||82/100||4.5/5||5/5||5/5||Nov 2014||1,999||-||Sony A7 II|
|Sony A7« »||+ +||80/100||5/5||4.5/5||5/5||Oct 2013||1,699||-||Sony A7|
|Sony A7R« »||+ +||82/100||4.5/5||5/5||5/5||Oct 2013||2,299||-||Sony A7R|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (-) not available.|
The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.
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.
- Canon 1300D vs Sony A7S
- Canon 77D vs Panasonic G85
- Canon 77D vs Sony RX0 II
- Canon T2i vs Sony A7S II
- Fujifilm X-A7 vs Sony A7S II
- Leica C-LUX vs Sony A7S
- Olympus E-510 vs Sony A7S II
- Olympus E-PM2 vs Sony A7S
- Panasonic GM5 vs Sony A7S
- Panasonic S1R vs Sony A7S II
- Pentax K-1 II vs Sony A7S
- Ricoh GR III vs Sony A7S II
Specifications: Canon 77D vs Sony A7S
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 Model||Canon 77D||Sony A7S|
|Camera Type||Digital single lens reflex||Mirrorless system camera|
|Camera Lens||Canon EF mount lenses||Sony E mount lenses|
|Launch Date||February 2017||April 2014|
|Launch Price||USD 899||USD 2499|
|Sensor Specs||Canon 77D||Sony A7S|
|Sensor Format||APS-C Sensor||Full Frame Sensor|
|Sensor Size||22.3 x 14.9 mm||35.8 x 23.9 mm|
|Sensor Area||332.27 mm2||855.62 mm2|
|Sensor Diagonal||26.8 mm||43 mm|
|Sensor Resolution||24 Megapixels||12 Megapixels|
|Image Resolution||6000 x 4000 pixels||4240 x 2832 pixels|
|Pixel Pitch||3.72 μm||8.45 μm|
|Pixel Density||7.22 MP/cm2||1.40 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||1080/60p Video||1080/60p Video|
|ISO Setting||100-25600 ISO||100-102400 ISO|
|ISO Boost||100-51200 ISO||50-409600 ISO|
|Image Processor||DIGIC 7||BIONZ X|
|DXO Sensor Quality (score)||78||87|
|DXO Color Depth (bits)||23.6||23.9|
|DXO Dynamic Range (EV)||13.3||13.2|
|DXO Low Light (ISO)||971||3702|
|Screen Specs||Canon 77D||Sony A7S|
|Viewfinder Type||Optical viewfinder||Electronic viewfinder|
|Viewfinder Field of View||95%||100%|
|Viewfinder Resolution||2400k dots|
|Top-Level Screen||Control Panel||no Top Display|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0 inch||3.0 inch|
|LCD Resolution||1040k dots||921k dots|
|LCD Attachment||Swivel screen||Tilting screen|
|Touch Input||Touchscreen||no Touchscreen|
|Shooting Specs||Canon 77D||Sony A7S|
|Autofocus System||Phase-detect AF||Contrast-detect AF|
|Manual Focusing Aid||No Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000/s||1/8000/s|
|Continuous Shooting||6 shutter flaps/s||5 shutter flaps/s|
|Electronic Shutter||no E-Shutter||YES|
|Time-Lapse Photography||Intervalometer built-in||no Intervalometer|
|Fill Flash||Build-in Flash||no On-Board Flash|
|Storage Medium||SDXC cards||MS or SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||UHS-I||UHS-I|
|Connectivity Specs||Canon 77D||Sony A7S|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||mini HDMI||micro HDMI|
|Microphone Port||External MIC port||External MIC port|
|Headphone Socket||no Headphone port||Headphone port|
|Wifi Support||Wifi built-in||Wifi built-in|
|Near-Field Communication||NFC built-in||NFC built-in|
|Bluetooth Support||Bluetooth built-in||no Bluetooth|
|Body Specs||Canon 77D||Sony A7S|
|Environmental Sealing||Not weather sealed||Weathersealed body|
|Battery Life (CIPA)||600 shots per charge||380 shots per charge|
|In-Camera Charging||no USB charging||USB charging|
131 x 100 x 76 mm
(5.2 x 3.9 x 3.0 in)
127 x 94 x 48 mm
(5.0 x 3.7 x 1.9 in)
|Camera Weight||540 g (19.0 oz)||489 g (17.2 oz)|
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