Canon G1 X Mark III vs T7i
The Canon PowerShot G1 X Mark III and the Canon EOS Rebel T7i (labelled Canon 800D in some countries) are two digital cameras that were announced, respectively, in October 2017 and February 2017. The G1X Mark III is a fixed lens compact, while the T7i 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 Canon EOS Rebel T7i? 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 Canon T7i. 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 Canon T7i is considerably larger (46 percent) than the Canon G1 X Mark III. It is worth mentioning in this context that the G1X Mark III is splash and dust resistant, while the T7i does not feature any corresponding weather-sealing.
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 T7i is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can compare the optics available for the T7i and their specifications in the Canon EF Lens Catalog.
The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.
|1.||Canon G1 X Mark III||115 mm||78 mm||51 mm||399 g||200||Y||Oct 2017||1,299|
|2.||Canon T7i||131 mm||100 mm||76 mm||532 g||600||n||Feb 2017||749|
|3.||Canon T8i||131 mm||103 mm||76 mm||515 g||800||n||Feb 2020||749|
|4.||Canon T7||129 mm||101 mm||78 mm||475 g||500||n||Feb 2018||449|
|5.||Canon 6D Mark II||144 mm||111 mm||75 mm||765 g||1200||Y||Jun 2017||1,999|
|6.||Canon 77D||131 mm||100 mm||76 mm||540 g||600||n||Feb 2017||899|
|7.||Canon 80D||139 mm||105 mm||79 mm||730 g||960||Y||Feb 2016||1,199|
|8.||Canon SX540||120 mm||82 mm||92 mm||442 g||205||n||Jan 2016||399|
|9.||Canon T6i||132 mm||101 mm||78 mm||555 g||440||n||Feb 2015||749|
|10.||Canon T5i||133 mm||100 mm||79 mm||580 g||440||n||Mar 2013||649|
|11.||Fujifilm X100V||128 mm||75 mm||53 mm||478 g||420||Y||Feb 2020||1,399|
|12.||Fujifilm X-T3||133 mm||93 mm||59 mm||539 g||390||Y||Sep 2018||1,499|
|13.||Fujifilm X100F||127 mm||75 mm||52 mm||469 g||390||n||Jan 2017||1,299|
|14.||Nikon D7500||136 mm||104 mm||73 mm||720 g||950||Y||Apr 2017||1,299|
|15.||Sony A6300||120 mm||67 mm||49 mm||404 g||400||Y||Feb 2016||999|
|16.||Sony A6500||120 mm||67 mm||53 mm||453 g||350||Y||Oct 2016||1,399|
|17.||Sony RX10 III||133 mm||94 mm||127 mm||1051 g||420||Y||Mar 2016||1,499|
|Notes: 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 tend to be associated with larger, more expensive camera bodies and lenses.
Both cameras under consideration feature an APS-C sensor and have a format factor (sometimes also referred to as "crop factor") of 1.5. Within the spectrum of camera sensors, this places the review cameras among the medium-sized sensor cameras that aim to strike a balance between image quality and portability. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
The two cameras under review do not only share the same sensor size, but also offer an identical resolution of 24 megapixels. This similarity in sensor specs implies that both the G1X Mark III and the T7i have the same pixel density, as well as the same pixel size. It should, however, be noted that the G1X Mark III is a somewhat more recent model (by 7 months) than the T7i, and its sensor might have benefitted from technological advances during this time.
The Canon PowerShot G1 X Mark III has a native sensitivity range from ISO 100 to ISO 25600. The corresponding ISO settings for the Canon EOS Rebel T7i are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 100-51200.
For many cameras, data on sensor performance has been reported by DXO Mark. 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. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
|1.||Canon G1 X Mark III||APS-C||24.0||6000||4000||1080/60p||..||..||..||..|
|5.||Canon 6D Mark II||Full Frame||26.0||6240||4160||1080/60p||24.4||11.9||2862||85|
|17.||Sony RX10 III||1-inch||20.0||5472||3648||4K/30p||23.1||12.6||472||70|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, and both provide the same movie specifications (1080/60p).
Apart from body and sensor, cameras can and do differ across a range of features. For example, the G1X Mark III has an electronic viewfinder (2360k dots), while the T7i 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 table below summarizes some of the other core capabilities of the Canon G1 X Mark III and Canon T7i in connection with corresponding information for a sample of similar cameras.
|1.||Canon G1 X Mark III||2360||n||3.0 / 1040||swivel||Y||1/2000s||9.0||Y||Y|
|2.||Canon T7i||optical||n||3.0 / 1040||swivel||Y||1/4000s||6.0||Y||n|
|3.||Canon T8i||optical||n||3.0 / 1040||swivel||Y||1/4000s||7.5||Y||n|
|4.||Canon T7||optical||n||3.0 / 920||fixed||n||1/4000s||3.0||Y||n|
|5.||Canon 6D Mark II||optical||Y||3.0 / 1040||swivel||Y||1/4000s||6.5||n||n|
|6.||Canon 77D||optical||Y||3.0 / 1040||swivel||Y||1/4000s||6.0||Y||n|
|7.||Canon 80D||optical||Y||3.0 / 1040||swivel||Y||1/8000s||7.0||Y||n|
|8.||Canon SX540||none||n||3.0 / 461||fixed||n||1/2000s||5.9||Y||Y|
|9.||Canon T6i||optical||n||3.0 / 1040||swivel||Y||1/4000s||5.0||Y||n|
|10.||Canon T5i||optical||n||3.0 / 1040||swivel||Y||1/4000s||5.0||Y||n|
|11.||Fujifilm X100V||3690||n||3.0 / 1620||tilting||Y||1/4000s||11.0||Y||n|
|12.||Fujifilm X-T3||3690||n||3.0 / 1040||tilting||Y||1/8000s||11.0||n||n|
|13.||Fujifilm X100F||2360||n||3.0 / 1040||fixed||n||1/4000s||8.0||Y||n|
|14.||Nikon D7500||optical||Y||3.2 / 922||tilting||Y||1/8000s||8.0||Y||n|
|15.||Sony A6300||2359||n||3.0 / 922||tilting||n||1/4000s||11.0||Y||n|
|16.||Sony A6500||2359||n||3.0 / 922||tilting||Y||1/4000s||11.0||Y||Y|
|17.||Sony RX10 III||2359||Y||3.0 / 1229||tilting||n||1/2000s||14.0||Y||Y|
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.
Concerning the storage of imaging data, both the G1X Mark III and the T7i write their files to SDXC 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 Canon EOS Rebel T7i 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.||Canon T7i||Y||stereo / mono||Y||-||mini||2.0||Y||Y||Y|
|3.||Canon T8i||Y||stereo / mono||Y||-||mini||2.0||Y||-||Y|
|4.||Canon T7||Y||mono / mono||-||-||mini||2.0||Y||Y||-|
|5.||Canon 6D Mark II||Y||stereo / mono||Y||-||mini||2.0||Y||Y||Y|
|6.||Canon 77D||Y||stereo / mono||Y||-||mini||2.0||Y||Y||Y|
|7.||Canon 80D||Y||stereo / mono||Y||Y||mini||2.0||Y||Y||-|
|8.||Canon SX540||-||stereo / mono||-||-||mini||2.0||Y||Y||-|
|9.||Canon T6i||Y||stereo / mono||Y||-||mini||2.0||Y||Y||-|
|10.||Canon T5i||Y||stereo / mono||Y||-||mini||2.0||-||-||-|
|11.||Fujifilm X100V||Y||stereo / mono||Y||-||micro||3.1||Y||-||Y|
|12.||Fujifilm X-T3||Y||stereo / mono||Y||Y||micro||3.1||Y||-||Y|
|13.||Fujifilm X100F||Y||stereo / mono||Y||-||micro||2.0||Y||-||-|
|14.||Nikon D7500||Y||stereo / mono||Y||Y||mini||2.0||Y||-||Y|
|15.||Sony A6300||Y||stereo / mono||Y||-||micro||2.0||Y||Y||-|
|16.||Sony A6500||Y||stereo / mono||Y||-||micro||2.0||Y||Y||-|
|17.||Sony RX10 III||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
It is notable that the T7i 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.
The G1X Mark III is a recent model that features in the current product line-up of Canon. In contrast, the T7i has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the T7i was succeeded by the Canon T8i. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon website.
So how do things add up? Is there a clear favorite between the Canon G1 X Mark III and the Canon T7i? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.
Reasons to prefer the Canon PowerShot G1 X Mark III:
- More framing info: Has an electronic viewfinder that displays shooting data.
- Faster burst: Shoots at higher frequency (9 vs 6 flaps/sec) to capture the decisive moment.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- Ready to shoot: Comes with a built-in lens, while the T7i requires a separate lens.
- More compact: Is smaller (115x78mm vs 131x100mm) and thus needs less room in the bag.
- Less heavy: Is lighter even though it comes with a built-in lens (unlike the T7i).
- Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
- Sharper images: Has hand-shake reducing image stabilization built-in.
- More modern: Is somewhat more recent (announced 7 months after the T7i).
Advantages of the Canon EOS Rebel T7i:
- Better sound: Can connect to an external microphone for higher quality sound recording.
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/2000s) to freeze action.
- More flexible: Makes it possible to change lenses and thus to use specialty optics.
- Longer lasting: Gets more shots (600 versus 200) out of a single battery charge.
- More heavily discounted: Has been on the market for longer (launched in February 2017).
If the count of relative strengths (bullet points above) is taken as a measure, the G1X Mark III emerges as the winner of the contest (9 : 6 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 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 Canon T7i 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 specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the G1X Mark III or the T7i. 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 (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|
|2.||Canon T7i||4.5/5||..||3.5/5||80/100||4.5/5||4/5||Feb 2017||749|
|3.||Canon T8i||4.5/5||+||3/5||80/100||4/5||3.5/5||Feb 2020||749|
|4.||Canon T7||..||o||..||..||3.5/5||3.5/5||Feb 2018||449|
|5.||Canon 6D Mark II||4/5||+||4/5||80/100||4.5/5||4/5||Jun 2017||1,999|
|6.||Canon 77D||4.5/5||..||4/5||82/100||4.5/5||4/5||Feb 2017||899|
|7.||Canon 80D||4/5||+ +||4.5/5||84/100||4.5/5||4.5/5||Feb 2016||1,199|
|8.||Canon SX540||..||..||..||..||..||..||Jan 2016||399|
|9.||Canon T6i||5/5||..||..||75/100||4.5/5||4.5/5||Feb 2015||749|
|10.||Canon T5i||..||..||..||76/100||4.5/5||4.5/5||Mar 2013||649|
|11.||Fujifilm X100V||5/5||+ +||4.5/5||86/100||5/5||4.5/5||Feb 2020||1,399|
|12.||Fujifilm X-T3||5/5||+ +||4.5/5||88/100||5/5||5/5||Sep 2018||1,499|
|13.||Fujifilm X100F||5/5||+||3.9/5||83/100||4.5/5||4.5/5||Jan 2017||1,299|
|14.||Nikon D7500||4.5/5||+ +||4.5/5||86/100||5/5||4.5/5||Apr 2017||1,299|
|15.||Sony A6300||4.5/5||+||..||85/100||5/5||5/5||Feb 2016||999|
|16.||Sony A6500||5/5||+ +||3.5/5||85/100||4.5/5||4.5/5||Oct 2016||1,399|
|17.||Sony RX10 III||5/5||+||..||84/100||4.5/5||4.5/5||Mar 2016||1,499|
|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. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. 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 60D vs Canon T7i
- Canon 70D vs Canon G1 X Mark III
- Canon G1 X Mark II vs Canon T7i
- Canon G1 X Mark III vs Fujifilm X-M1
- Canon G1 X Mark III vs Nikon D600
- Canon G1 X Mark III vs Olympus E-510
- Canon G1 X Mark III vs Olympus E-P7
- Canon G1 X Mark III vs Sigma fp
- Canon T4i vs Canon T7i
- Canon T7i vs Leica M10-P
- Canon T7i vs Leica S Typ 006
- Canon T7i vs Sony A9 II
Specifications: Canon G1 X Mark III vs Canon T7i
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||Canon T7i|
|Camera Type||Fixed lens compact camera||Digital single lens reflex|
|Camera Lens||24-72mm f/2.8-5.6||Canon EF mount lenses|
|Launch Date||October 2017||February 2017|
|Launch Price||USD 1,299||USD 749|
|Sensor Specs||Canon G1 X Mark III||Canon T7i|
|Sensor Format||APS-C Sensor||APS-C Sensor|
|Sensor Size||22.3 x 14.9 mm||22.3 x 14.9 mm|
|Sensor Area||332.27 mm2||332.27 mm2|
|Sensor Diagonal||26.8 mm||26.8 mm|
|Sensor Resolution||24 Megapixels||24 Megapixels|
|Image Resolution||6000 x 4000 pixels||6000 x 4000 pixels|
|Pixel Pitch||3.72 μm||3.72 μm|
|Pixel Density||7.22 MP/cm2||7.22 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||100 - 51,200 ISO|
|Image Processor||DIGIC 7||DIGIC 7|
|Screen Specs||Canon G1 X Mark III||Canon T7i|
|Viewfinder Type||Electronic viewfinder||Optical viewfinder|
|Viewfinder Field of View||100%||95%|
|Viewfinder Resolution||2360k dots|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||1040k dots||1040k dots|
|LCD Attachment||Swivel screen||Swivel screen|
|Shooting Specs||Canon G1 X Mark III||Canon T7i|
|Focus System||On-Sensor Phase-detect||Phase-detect AF|
|Manual Focusing Aid||Focus Peaking||no Peaking Feature|
|Continuous Shooting||9 shutter flaps/s||6 shutter flaps/s|
|Time-Lapse Photography||Intervalometer built-in||no Intervalometer|
|Fill Flash||Built-in Flash||Built-in Flash|
|Storage Medium||SDXC cards||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||Canon T7i|
|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||Bluetooth built-in|
|Body Specs||Canon G1 X Mark III||Canon T7i|
|Environmental Sealing||Weathersealed body||not weather sealed|
|Battery Life (CIPA)||200 shots per charge||600 shots per charge|
115 x 78 x 51 mm
(4.5 x 3.1 x 2.0 in)
131 x 100 x 76 mm
(5.2 x 3.9 x 3.0 in)
|Camera Weight||399 g (14.1 oz)||532 g (18.8 oz)|
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