Canon G1 X Mark III vs Sony A77 II
The Canon PowerShot G1 X Mark III and the Sony Alpha SLT-A77 II are two enthusiast cameras that were revealed to the public, respectively, in October 2017 and May 2014. The G1X Mark III is a fixed lens compact, while the A77 II is a DSLR. Both cameras are equipped with an APS-C sensor. Both cameras offer a resolution of 24 megapixels.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon PowerShot G1 X Mark III and the Sony Alpha SLT-A77 II? 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 G1 X Mark III and the Sony A77 II. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All size dimensions 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 A77 II is considerably larger (66 percent) than the Canon G1 X Mark III. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.
The above size and weight comparisons are to some extent incomplete and possibly misleading, as the G1X Mark III has a lens built in, whereas the A77 II is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup.
The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. 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.
|1.||Canon G1 X Mark III||115 mm||78 mm||51 mm||399 g||200||Y||Oct 2017||1,299||amazon.com|
|2.||Sony A77 II||143 mm||104 mm||81 mm||647 g||480||Y||May 2014||1,199||ebay.com|
|3.||Canon 6D Mark II||144 mm||111 mm||75 mm||765 g||1200||Y||Jun 2017||1,999||amazon.com|
|4.||Canon 80D||139 mm||105 mm||79 mm||730 g||960||Y||Feb 2016||1,199||ebay.com|
|5.||Canon SX540||120 mm||82 mm||92 mm||442 g||205||n||Jan 2016||399||ebay.com|
|6.||Fujifilm X100V||128 mm||75 mm||53 mm||478 g||420||Y||Feb 2020||1,399||amazon.com|
|7.||Fujifilm X-T3||133 mm||93 mm||59 mm||539 g||390||Y||Sep 2018||1,499||ebay.com|
|8.||Fujifilm X100F||127 mm||75 mm||52 mm||469 g||390||n||Jan 2017||1,299||ebay.com|
|9.||Nikon D7500||136 mm||104 mm||73 mm||720 g||950||Y||Apr 2017||1,299||amazon.com|
|10.||Nikon D7200||136 mm||107 mm||76 mm||765 g||1110||Y||Mar 2015||1,199||ebay.com|
|11.||Nikon D7100||136 mm||107 mm||76 mm||765 g||950||Y||Feb 2013||1,199||ebay.com|
|12.||Sony A6300||120 mm||67 mm||49 mm||404 g||400||Y||Feb 2016||999||ebay.com|
|13.||Sony A6500||120 mm||67 mm||53 mm||453 g||350||Y||Oct 2016||1,399||ebay.com|
|14.||Sony RX10 III||133 mm||94 mm||127 mm||1051 g||420||Y||Mar 2016||1,499||ebay.com|
|15.||Sony A68||143 mm||104 mm||81 mm||610 g||540||n||Nov 2015||699||ebay.com|
|16.||Sony A7 II||127 mm||96 mm||60 mm||599 g||350||Y||Nov 2014||1,999||ebay.com|
|17.||Sony A77||143 mm||104 mm||81 mm||732 g||470||Y||Aug 2011||1,399||ebay.com|
|Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
The price is, of course, an important factor in any camera decision. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. 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.
The size of the sensor inside a digital camera is one of the key determinants 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. 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.
Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the A77 II is 11 percent bigger. They nevertheless have the same format factor of 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
Even though the A77 II has a larger sensor, both cameras offer the same resolution of 24 megapixels. This implies that the A77 II has a lower pixel density and larger individual pixels (with a pixel pitch of 3.91μm versus 3.72μm for the G1X Mark III), which gives it a potential advantage in terms of light gathering capacity. It should, however, be noted that the G1X Mark III is much more recent (by 3 years and 5 months) than the A77 II, and its sensor will have benefitted from technological advances during this time that at least partly compensate for the smaller pixel size.
The G1X Mark III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
The Canon PowerShot G1 X Mark III has a native sensitivity range from ISO 100 to ISO 25600. The corresponding ISO settings for the Sony Alpha SLT-A77 II are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-51200.
Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.
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"). The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
|1.||Canon G1 X Mark III||APS-C||24.0||6000||4000||1080/60p||23.8||13.2||1649||81|
|2.||Sony A77 II||APS-C||24.0||6000||4000||1080/60p||23.5||12.7||1442||77|
|3.||Canon 6D Mark II||Full Frame||26.0||6240||4160||1080/60p||24.4||11.9||2862||85|
|14.||Sony RX10 III||1-inch||20.0||5472||3648||4K/30p||23.1||12.6||472||70|
|16.||Sony A7 II||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90|
|Note: DXO values in italics represent estimates based on sensor size and age.|
Many modern cameras cannot only take still pictures, but also record videos. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture 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. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the G1X Mark III offers a slightly higher resolution than the one in the A77 II (2360k vs 2359k dots). The adjacent table lists some of the other core features of the Canon G1 X Mark III and Sony A77 II along with similar information for a selection of comparators.
|1.||Canon G1 X Mark III||2360||n||3.0 / 1040||swivel||Y||1/2000s||9.0/s||Y||Y|
|2.||Sony A77 II||2359||Y||3.0 / 1229||full-flex||n||1/8000s||12.0/s||Y||Y|
|3.||Canon 6D Mark II||optical||Y||3.0 / 1040||swivel||Y||1/4000s||6.5/s||n||n|
|4.||Canon 80D||optical||Y||3.0 / 1040||swivel||Y||1/8000s||7.0/s||Y||n|
|5.||Canon SX540||none||n||3.0 / 461||fixed||n||1/2000s||5.9/s||Y||Y|
|6.||Fujifilm X100V||3690||n||3.0 / 1620||tilting||Y||1/4000s||11.0/s||Y||n|
|7.||Fujifilm X-T3||3690||n||3.0 / 1040||full-flex||Y||1/8000s||11.0/s||n||n|
|8.||Fujifilm X100F||2360||n||3.0 / 1040||fixed||n||1/4000s||8.0/s||Y||n|
|9.||Nikon D7500||optical||Y||3.2 / 922||tilting||Y||1/8000s||8.0/s||Y||n|
|10.||Nikon D7200||optical||Y||3.2 / 1229||fixed||n||1/8000s||6.0/s||Y||n|
|11.||Nikon D7100||optical||Y||3.2 / 1229||fixed||n||1/8000s||6.0/s||Y||n|
|12.||Sony A6300||2359||n||3.0 / 922||tilting||n||1/4000s||11.0/s||Y||n|
|13.||Sony A6500||2359||n||3.0 / 922||tilting||Y||1/4000s||11.0/s||Y||Y|
|14.||Sony RX10 III||2359||Y||3.0 / 1229||tilting||n||1/2000s||14.0/s||Y||Y|
|15.||Sony A68||1440||Y||2.7 / 460||tilting||n||1/4000s||8.0/s||Y||Y|
|16.||Sony A7 II||2400||n||3.0 / 1230||tilting||n||1/8000s||5.0/s||n||Y|
|17.||Sony A77||2359||Y||3.0 / 921||full-flex||n||1/8000s||12.0/s||Y||Y|
|Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.|
One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The G1X Mark III has a touchscreen, while the A77 II has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.Both cameras have an articulated rear screen that can be turned to be front-facing. This feature will be particularly appreciated by vloggers and photographers who are interested in taking selfies.
The Canon G1 X Mark 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 G1X Mark III writes its imaging data to SDXC cards, while the A77 II 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 PowerShot G1 X Mark III and Sony Alpha SLT-A77 II and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Mic / Speaker
|1.||Canon G1 X Mark III||Y||stereo / mono||-||-||micro||2.0||Y||Y||Y|
|2.||Sony A77 II||Y||stereo / mono||Y||-||mini||2.0||Y||Y||-|
|3.||Canon 6D Mark II||Y||stereo / mono||Y||-||mini||2.0||Y||Y||Y|
|4.||Canon 80D||Y||stereo / mono||Y||Y||mini||2.0||Y||Y||-|
|5.||Canon SX540||-||stereo / mono||-||-||mini||2.0||Y||Y||-|
|6.||Fujifilm X100V||Y||stereo / mono||Y||-||micro||3.1||Y||-||Y|
|7.||Fujifilm X-T3||Y||stereo / mono||Y||Y||micro||3.1||Y||-||Y|
|8.||Fujifilm X100F||Y||stereo / mono||Y||-||micro||2.0||Y||-||-|
|9.||Nikon D7500||Y||stereo / mono||Y||Y||mini||2.0||Y||-||Y|
|10.||Nikon D7200||Y||stereo / mono||Y||Y||mini||2.0||Y||Y||-|
|11.||Nikon D7100||Y||stereo / mono||Y||Y||mini||2.0||-||-||-|
|12.||Sony A6300||Y||stereo / mono||Y||-||micro||2.0||Y||Y||-|
|13.||Sony A6500||Y||stereo / mono||Y||-||micro||2.0||Y||Y||-|
|14.||Sony RX10 III||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
|15.||Sony A68||Y||stereo / mono||Y||-||micro||2.0||-||-||-|
|16.||Sony A7 II||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
|17.||Sony A77||Y||stereo / mono||Y||-||mini||2.0||-||-||-|
It is notable that the A77 II has a microphone port, which can help to improve the quality of audio recordings by attaching an external microphone. The G1X Mark III does not feature such a mic input.
Studio photographers will appreciate that the Sony A77 II (unlike the G1X Mark III) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
The G1X Mark III is a recent model that features in the current product line-up of Canon. In contrast, the A77 II has been discontinued (but can be found pre-owned on ebay). There has not been a direct replacement model for the A77 II from Sony. Further information on the features and operation of the G1X Mark III and A77 II can be found, respectively, in the Canon G1 X Mark III Manual (free pdf) or the online Sony A77 II Manual.
So what is the bottom line? Is the Canon G1 X Mark III better than the Sony A77 II or vice versa? The listing below highlights the relative strengths of the two models.
Advantages of the Canon PowerShot G1 X Mark III:
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- Ready to shoot: Comes with a built-in lens, while the A77 II requires a separate lens.
- More compact: Is smaller (115x78mm vs 143x104mm) and thus needs less room in the bag.
- Less heavy: Is lighter even though it comes with a built-in lens (unlike the A77 II).
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- More modern: Reflects 3 years and 5 months of technical progress since the A77 II launch.
Arguments in favor of the Sony Alpha SLT-A77 II:
- Better sound: Can connect to an external microphone for higher quality sound recording.
- Easier setting verification: Features a control panel on top to check shooting parameters.
- More detailed LCD: Has a higher resolution rear screen (1229k vs 1040k dots).
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/2000s) to freeze action.
- Faster burst: Shoots at higher frequency (12 vs 9 flaps/sec) to capture the decisive moment.
- More flexible: Makes it possible to change lenses and thus to use specialty optics.
- Longer lasting: Gets more shots (480 versus 200) out of a single battery charge.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- More heavily discounted: Has been around for much longer (launched in May 2014).
If the count of relative strengths (bullet points above) is taken as a measure, the A77 II comes out slightly ahead of the G1X Mark III (9 : 8 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.
How about other alternatives? Do the specifications of the Canon G1 X Mark III and the Sony A77 II place the cameras among the top in their class? Find out in the latest Best Travel-Zoom Camera and Best DSLR Camera listings whether the two cameras rank among the cream of the crop.
In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it says little about, for example, the shooting experience and imaging performance of the G1X Mark III and the A77 II in practical situations. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.
This is why expert reviews 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.
|1.||Canon G1 X Mark III||5/5||+||4/5||79/100||4.5/5||4.5/5||Oct 2017||1,299||amazon.com|
|2.||Sony A77 II||4/5||..||..||80/100||4.5/5||5/5||May 2014||1,199||ebay.com|
|3.||Canon 6D Mark II||4/5||+||4/5||80/100||4.5/5||4/5||Jun 2017||1,999||amazon.com|
|4.||Canon 80D||4/5||+ +||4.5/5||84/100||4.5/5||4.5/5||Feb 2016||1,199||ebay.com|
|5.||Canon SX540||..||..||..||..||..||..||Jan 2016||399||ebay.com|
|6.||Fujifilm X100V||5/5||+ +||4.5/5||86/100||5/5||4.5/5||Feb 2020||1,399||amazon.com|
|7.||Fujifilm X-T3||5/5||+ +||4.5/5||88/100||5/5||5/5||Sep 2018||1,499||ebay.com|
|8.||Fujifilm X100F||5/5||+||3.9/5||83/100||4.5/5||4.5/5||Jan 2017||1,299||ebay.com|
|9.||Nikon D7500||4.5/5||+ +||4.5/5||86/100||5/5||4.5/5||Apr 2017||1,299||amazon.com|
|10.||Nikon D7200||4/5||+ +||..||84/100||4.5/5||4.5/5||Mar 2015||1,199||ebay.com|
|11.||Nikon D7100||5/5||+ +||..||85/100||4.5/5||4.5/5||Feb 2013||1,199||ebay.com|
|12.||Sony A6300||4.5/5||+||..||85/100||5/5||5/5||Feb 2016||999||ebay.com|
|13.||Sony A6500||5/5||+ +||3.5/5||85/100||4.5/5||4.5/5||Oct 2016||1,399||ebay.com|
|14.||Sony RX10 III||5/5||+||..||84/100||4.5/5||4.5/5||Mar 2016||1,499||ebay.com|
|15.||Sony A68||3/5||..||..||..||4/5||4/5||Nov 2015||699||ebay.com|
|16.||Sony A7 II||5/5||+||4/5||82/100||4.5/5||5/5||Nov 2014||1,999||ebay.com|
|17.||Sony A77||5/5||91/100||..||81/100||..||5/5||Aug 2011||1,399||ebay.com|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
Care should be taken when interpreting the review scores above, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, 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 use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
- Canon D60 vs Sony A77 II
- Canon G1 X Mark III vs Canon M50
- Canon G1 X Mark III vs Leica M Typ 262
- Canon G1 X Mark III vs Leica M10
- Canon G1 X Mark III vs Nikon Z7 II
- Canon G1 X Mark III vs Olympus E-M10 IV
- Canon G1 X Mark III vs Olympus XZ-1
- Canon SX70 vs Sony A77 II
- Fujifilm GFX 50S vs Sony A77 II
- Nikon D5500 vs Sony A77 II
- Nikon Z9 vs Sony A77 II
- Panasonic G80 vs Sony A77 II
Specifications: Canon G1 X Mark III vs Sony A77 II
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 G1 X Mark III||Sony A77 II|
|Camera Type||Fixed lens compact camera||Digital single lens reflex|
|Camera Lens||24-72mm f/2.8-5.6||Sony A mount lenses|
|Launch Date||October 2017||May 2014|
|Launch Price||USD 1,299||USD 1,199|
|Sensor Specs||Canon G1 X Mark III||Sony A77 II|
|Sensor Format||APS-C Sensor||APS-C Sensor|
|Sensor Size||22.3 x 14.9 mm||23.5 x 15.6 mm|
|Sensor Area||332.27 mm2||366.6 mm2|
|Sensor Diagonal||26.8 mm||28.2 mm|
|Sensor Resolution||24 Megapixels||24 Megapixels|
|Image Resolution||6000 x 4000 pixels||6000 x 4000 pixels|
|Pixel Pitch||3.72 μm||3.91 μm|
|Pixel Density||7.22 MP/cm2||6.55 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||1080/60p Video||1080/60p Video|
|ISO Setting||100 - 25,600 ISO||100 - 25,600 ISO|
|ISO Boost||no Enhancement||50 - 51,200 ISO|
|Image Processor||DIGIC 7||BIONZ X|
|Screen Specs||Canon G1 X Mark III||Sony A77 II|
|Viewfinder Type||Electronic viewfinder||Electronic viewfinder|
|Viewfinder Field of View||100%||100%|
|Viewfinder Resolution||2360k dots||2359k dots|
|Top-Level Screen||no Top Display||Control Panel|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||1040k dots||1229k dots|
|LCD Attachment||Swivel screen||Fully flexible screen|
|Touch Input||Touchscreen||no Touchscreen|
|Shooting Specs||Canon G1 X Mark III||Sony A77 II|
|Focus System||On-Sensor Phase-detect||Phase-detect AF|
|Manual Focusing Aid||Focus Peaking||Focus Peaking|
|Max Shutter Speed (mechanical)||1/2000s||1/8000s|
|Continuous Shooting||9 shutter flaps/s||12 shutter flaps/s|
|Time-Lapse Photography||Intervalometer built-in||no Intervalometer|
|Image Stabilization||Lens-based stabilization||In-body stabilization|
|Fill Flash||Built-in Flash||Built-in 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 G1 X Mark III||Sony A77 II|
|Studio Flash||no PC Sync||PC Sync socket|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||micro HDMI||mini HDMI|
|Microphone Port||no MIC socket||External MIC 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 G1 X Mark III||Sony A77 II|
|Environmental Sealing||Weathersealed body||Weathersealed body|
|Battery Life (CIPA)||200 shots per charge||480 shots per charge|
115 x 78 x 51 mm
(4.5 x 3.1 x 2.0 in)
143 x 104 x 81 mm
(5.6 x 4.1 x 3.2 in)
|Camera Weight||399 g (14.1 oz)||647 g (22.8 oz)|
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