Canon 7D vs G3X
The Canon EOS 7D and the Canon PowerShot G3 X are two digital cameras that were revealed to the public, respectively, in September 2009 and June 2015. The 7D is a DSLR, while the G3X is a fixed lens compact. The cameras are based on an APS-C (7D) and an one-inch (G3X) sensor. The 7D has a resolution of 17.9 megapixels, whereas the G3X provides 20 MP.
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 EOS 7D and the Canon PowerShot G3 X? 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 7D and the Canon G3 X. 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 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 G3 X is considerably smaller (42 percent) than the Canon 7D. 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 G3X has a lens built in, whereas the 7D 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 7D and their specifications in the Canon EF Lens Catalog.
The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.
|1.||Canon 7D||148 mm||111 mm||74 mm||860 g||800||Y||Sep 2009||1,699|
|2.||Canon G3 X||123 mm||77 mm||105 mm||733 g||300||Y||Jun 2015||999|
|3.||Canon 80D||139 mm||105 mm||79 mm||730 g||960||Y||Feb 2016||1,199|
|4.||Canon G9 X||98 mm||58 mm||31 mm||209 g||220||n||Oct 2015||529|
|5.||Canon 7D II||149 mm||112 mm||78 mm||910 g||670||Y||Sep 2014||1,799|
|6.||Canon G7 X||103 mm||60 mm||40 mm||304 g||210||n||Sep 2014||699|
|7.||Canon 70D||139 mm||104 mm||79 mm||755 g||920||Y||Jul 2013||1,199|
|8.||Canon 60D||145 mm||106 mm||79 mm||755 g||1100||Y||Aug 2010||1,399|
|9.||Canon T2i||129 mm||98 mm||62 mm||530 g||440||n||Feb 2010||699|
|10.||Canon T1i||129 mm||98 mm||62 mm||520 g||400||n||Mar 2009||799|
|11.||Canon 5D Mark II||152 mm||114 mm||75 mm||850 g||850||Y||Sep 2008||3,499|
|12.||Canon 50D||146 mm||108 mm||74 mm||822 g||800||Y||Aug 2008||1,299|
|13.||Canon 30D||144 mm||106 mm||74 mm||785 g||750||n||Feb 2006||1,399|
|14.||Canon 20D||144 mm||106 mm||72 mm||770 g||700||n||Aug 2004||1,499|
|15.||Nikon D7000||132 mm||105 mm||77 mm||780 g||1050||Y||Sep 2010||1,499|
|16.||Panasonic FZ1000||137 mm||99 mm||131 mm||831 g||360||n||Jun 2014||899|
|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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The G3X was launched at a lower price than the 7D, despite having a lens built in. 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 size of the sensor inside a digital camera is one of the key determinants 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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors tend to be associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Canon 7D features an APS-C sensor and the Canon G3 X an one-inch sensor. The sensor area in the G3X is 65 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.6 and 2.7. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
Despite having a smaller sensor, the G3X offers a higher resolution of 20 megapixels, compared with 17.9 MP of the 7D. 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 2.41μm versus 4.31μm for the 7D). However, it should be noted that the G3X is much more recent (by 5 years and 9 months) than the 7D, 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 G3 X implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the G3X for good quality output (200 dots per inch) amounts to 27.4 x 18.2 inches or 69.5 x 46.3 cm, for very good quality (250 dpi) 21.9 x 14.6 inches or 55.6 x 37.1 cm, and for excellent quality (300 dpi) 18.2 x 12.2 inches or 46.3 x 30.9 cm. The corresponding values for the Canon 7D 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 Canon EOS 7D 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 Canon PowerShot G3 X are ISO 125 to ISO 12800, with the possibility to increase the ISO range to 125-25600.
Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. The Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar imaging performance. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
|2.||Canon G3 X||1-inch||20.0||5472||3648||1080/60p||21.4||12.3||521||63|
|4.||Canon G9 X||1-inch||20.0||5472||3648||1080/60p||21.5||12.3||495||63|
|5.||Canon 7D II||APS-C||20.0||5472||3648||1080/60p||22.4||11.8||1082||70|
|6.||Canon G7 X||1-inch||20.0||5472||3648||1080/60p||23.0||12.7||556||71|
|11.||Canon 5D Mark II||Full Frame||21.0||5616||3744||1080/30p||23.7||11.9||1815||79|
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, but the G3X provides a faster frame rate than the 7D. It can shoot movie footage at 1080/60p, while the 7D is limited to 1080/30p.
Apart from body and sensor, cameras can and do differ across a range of features. For example, the 7D has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the G3X relies on live view and the rear LCD for framing. That said, the G3X can be equipped with an optional viewfinder – the EVF-DC1. The following table reports on some other key feature differences and similarities of the Canon 7D, the Canon G3 X, and comparable cameras.
|1.||Canon 7D||optical||Y||3.0 / 920||fixed||n||1/8000s||8.0||Y||n|
|2.||Canon G3 X||optional||n||3.2 / 1620||tilting||Y||1/2000s||5.9||Y||Y|
|3.||Canon 80D||optical||Y||3.0 / 1040||swivel||Y||1/8000s||7.0||Y||n|
|4.||Canon G9 X||none||n||3.0 / 1040||fixed||Y||1/2000s||6.0||Y||Y|
|5.||Canon 7D II||optical||Y||3.0 / 1040||fixed||n||1/8000s||10.0||Y||n|
|6.||Canon G7 X||none||n||3.0 / 1040||tilting||Y||1/2000s||6.5||Y||Y|
|7.||Canon 70D||optical||Y||3.0 / 1040||swivel||Y||1/8000s||7.0||Y||n|
|8.||Canon 60D||optical||Y||3.0 / 1040||swivel||n||1/8000s||5.3||Y||n|
|9.||Canon T2i||optical||n||3.0 / 1040||fixed||n||1/4000s||3.7||Y||n|
|10.||Canon T1i||optical||n||3.0 / 920||fixed||n||1/4000s||3.4||Y||n|
|11.||Canon 5D Mark II||optical||Y||3.0 / 920||fixed||n||1/8000s||3.9||n||n|
|12.||Canon 50D||optical||Y||3.0 / 920||fixed||n||1/8000s||6.3||Y||n|
|13.||Canon 30D||optical||Y||2.5 / 230||fixed||n||1/8000s||5.0||Y||n|
|14.||Canon 20D||optical||Y||1.8 / 118||fixed||n||1/8000s||5.0||Y||n|
|15.||Nikon D7000||optical||Y||3.0 / 921||fixed||n||1/8000s||6.0||Y||n|
|16.||Panasonic FZ1000||2359||n||3.0 / 921||swivel||n||1/4000s||12.0||Y||Y|
One feature that is present on the 7D, but is missing on the G3X is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.The G3X has an articulated screen that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in taking selfies. In contrast, the 7D does not have a selfie-screen.
The 7D writes its imaging data to Compact Flash cards, while the G3X uses SDXC cards.
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 7D and Canon PowerShot G3 X and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Mic / Speaker
|1.||Canon 7D||Y||mono / -||Y||-||mini||2.0||-||-||-|
|2.||Canon G3 X||Y||stereo / mono||Y||Y||mini||2.0||Y||Y||-|
|3.||Canon 80D||Y||stereo / mono||Y||Y||mini||2.0||Y||Y||-|
|4.||Canon G9 X||-||stereo / mono||-||-||micro||2.0||Y||Y||-|
|5.||Canon 7D II||Y||stereo / mono||Y||Y||mini||3.0||-||-||-|
|6.||Canon G7 X||-||stereo / mono||-||-||micro||2.0||Y||Y||-|
|7.||Canon 70D||Y||stereo / mono||Y||-||mini||2.0||Y||-||-|
|8.||Canon 60D||Y||mono / mono||Y||-||mini||2.0||-||-||-|
|9.||Canon T2i||Y||stereo / -||Y||-||mini||2.0||-||-||-|
|10.||Canon T1i||Y||mono / mono||-||-||mini||2.0||-||-||-|
|11.||Canon 5D Mark II||Y||mono / mono||Y||-||mini||2.0||-||-||-|
|12.||Canon 50D||Y||- / -||-||-||mini||2.0||-||-||-|
|13.||Canon 30D||Y||- / -||-||-||-||2.0||-||-||-|
|14.||Canon 20D||Y||- / -||-||-||-||1.1||-||-||-|
|15.||Nikon D7000||Y||mono / mono||Y||-||mini||2.0||-||-||-|
|16.||Panasonic FZ1000||Y||stereo / mono||Y||-||micro||2.0||Y||Y||-|
It is notable that the G3X offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the 7D does not provide wifi capability.
Studio photographers will appreciate that the Canon 7D (unlike the G3X) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
The G3X is a recent model that features in the current product line-up of Canon. In contrast, the 7D has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the 7D was succeeded by the Canon 7D Mark II. 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 what is the bottom line? Is there a clear favorite between the Canon 7D and the Canon G3 X? Which camera is better? The listing below highlights the relative strengths of the two models.
Arguments in favor of the Canon EOS 7D:
- Better low-light sensitivity: Requires less light for good images (0.7 stops ISO advantage).
- Easier framing: Has an optical viewfinder for image composition and settings control.
- Easier setting verification: Features an LCD display on top to control shooting parameters.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/2000s) to freeze action.
- Faster burst: Shoots at higher frequency (8 vs 5.9 flaps/sec) to capture the decisive moment.
- More flexible: Can take a variety of interchangeable lenses, including specialty optics.
- Longer lasting: Can take more shots (800 versus 300) on a single battery charge.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- More heavily discounted: Has been available for much longer (launched in September 2009).
Reasons to prefer the Canon PowerShot G3 X:
- More detail: Has more megapixels (20 vs 17.9MP), which boosts linear resolution by 6%.
- More dynamic range: Captures a broader range of light and dark details (0.6 EV of extra DR).
- Better video: Provides higher movie framerates (1080/60p versus 1080/30p).
- Better sound control: Has a headphone port that enables audio monitoring while recording.
- Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
- More detailed LCD: Has a higher resolution rear screen (1620k vs 920k dots).
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Ready to shoot: Comes with an integrated lens, while the 7D requires a separate lens.
- More compact: Is smaller (123x77mm vs 148x111mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight even though it has a lens built in (unlike the 7D).
- Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
- 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.
- More affordable: Was introduced at a lower price, despite coming with a built-in lens.
- More modern: Reflects 5 years and 9 months of technical progress since the 7D launch.
If the count of individual advantages (bullet points above) is taken as a guide, the G3X is the clear winner of the contest (17 : 9 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding on a new camera. 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 7D and the Canon G3 X place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Superzoom Camera listings whether the two cameras rank among the cream of the crop.
In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the 7D or the G3X 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.
This is where reviews by experts come in. 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 7D||5/5||+ +||..||84/100||4.5/5||4.5/5||Sep 2009||1,699|
|2.||Canon G3 X||3.5/5||+||..||..||4.5/5||4/5||Jun 2015||999|
|3.||Canon 80D||4/5||+ +||4.5/5||84/100||4.5/5||4.5/5||Feb 2016||1,199|
|4.||Canon G9 X||3.5/5||+ +||..||..||4.5/5||4.5/5||Oct 2015||529|
|5.||Canon 7D II||4.5/5||+||3.5/5||84/100||4/5||4.5/5||Sep 2014||1,799|
|6.||Canon G7 X||4/5||+ +||..||77/100||4.5/5||4.5/5||Sep 2014||699|
|7.||Canon 70D||5/5||+ +||..||83/100||4.5/5||5/5||Jul 2013||1,199|
|8.||Canon 60D||5/5||+||..||79/100||4/5||4.5/5||Aug 2010||1,399|
|9.||Canon T2i||..||+ +||..||77/100||4/5||4.5/5||Feb 2010||699|
|10.||Canon T1i||..||+ +||..||74/100||4.5/5||4.5/5||Mar 2009||799|
|11.||Canon 5D Mark II||4/5||91/100||..||79/100||4/5||..||Sep 2008||3,499|
|12.||Canon 50D||..||+ +||..||+ +||4.5/5||4.5/5||Aug 2008||1,299|
|13.||Canon 30D||..||+ +||..||+ +||o||..||Feb 2006||1,399|
|14.||Canon 20D||..||..||..||+ +||..||..||Aug 2004||1,499|
|15.||Nikon D7000||4/5||..||..||80/100||4.5/5||4.5/5||Sep 2010||1,499|
|16.||Panasonic FZ1000||4/5||+ +||..||82/100||4.5/5||4.5/5||Jun 2014||899|
|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. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. 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? In case you are interested in seeing how other cameras pair up, just make a corresponding selection in the search boxes below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
Specifications: Canon 7D vs Canon G3 X
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 7D||Canon G3 X|
|Camera Type||Digital single lens reflex||Fixed lens compact camera|
|Camera Lens||Canon EF mount lenses||24-600mm f/2.8-5.6|
|Launch Date||September 2009||June 2015|
|Launch Price||USD 1,699||USD 999|
|Sensor Specs||Canon 7D||Canon G3 X|
|Sensor Format||APS-C Sensor||1" Sensor|
|Sensor Size||22.3 x 14.9 mm||13.2 x 8.8 mm|
|Sensor Area||332.27 mm2||116.16 mm2|
|Sensor Diagonal||26.8 mm||15.9 mm|
|Sensor Resolution||17.9 Megapixels||20 Megapixels|
|Image Resolution||5184 x 3456 pixels||5472 x 3648 pixels|
|Pixel Pitch||4.31 μm||2.41 μm|
|Pixel Density||5.39 MP/cm2||17.18 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||1080/30p Video||1080/60p Video|
|ISO Setting||100 - 6,400 ISO||125 - 12,800 ISO|
|ISO Boost||100 - 12,800 ISO||125 - 25,600 ISO|
|Image Processor||DIGIC 4 (Dual)||DIGIC 6|
|DXO Sensor Quality (score)||66||63|
|DXO Color Depth (bits)||22.0||21.4|
|DXO Dynamic Range (EV)||11.7||12.3|
|DXO Low Light (ISO)||854||521|
|Screen Specs||Canon 7D||Canon G3 X|
|Viewfinder Type||Optical viewfinder||Viewfinder optional|
|Viewfinder Field of View||100%|
|Top-Level Screen||Control Panel||no Top Display|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.2inch|
|LCD Resolution||920k dots||1620k dots|
|LCD Attachment||Fixed screen||Tilting screen|
|Touch Input||no Touchscreen||Touchscreen|
|Shooting Specs||Canon 7D||Canon G3 X|
|Focus System||Phase-detect AF||Contrast-detect AF|
|Manual Focusing Aid||no Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/8000s||1/2000s|
|Continuous Shooting||8 shutter flaps/s||5.9 shutter flaps/s|
|Fill Flash||Built-in Flash||Built-in Flash|
|Storage Medium||CF cards||SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|Connectivity Specs||Canon 7D||Canon G3 X|
|Studio Flash||PC Sync socket||no PC Sync|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||mini HDMI||mini 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|
|Body Specs||Canon 7D||Canon G3 X|
|Environmental Sealing||Weathersealed body||Weathersealed body|
|Battery Life (CIPA)||800 shots per charge||300 shots per charge|
148 x 111 x 74 mm
(5.8 x 4.4 x 2.9 in)
123 x 77 x 105 mm
(4.8 x 3.0 x 4.1 in)
|Camera Weight||860 g (30.3 oz)||733 g (25.9 oz)|
Did you notice an error on this page? If so, please get in touch, so that we can correct the information.