Canon G9 X vs Nikon D7100
The Canon PowerShot G9 X and the Nikon D7100 are two digital cameras that were officially introduced, respectively, in October 2015 and February 2013. The G9X is a fixed lens compact, while the D7100 is a DSLR. The cameras are based on an one-inch (G9X) and an APS-C (D7100) sensor. The Canon has a resolution of 20 megapixels, whereas the Nikon provides 24 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 PowerShot G9 X and the Nikon D7100? 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.
An illustration of the physical size and weight of the Canon G9 X and the Nikon D7100 is provided 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 dimensions are rounded to the nearest millimeter.
The G9X can be obtained in two different colors (black, silver), while the D7100 is only available in black.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Nikon D7100 is considerably larger (156 percent) than the Canon G9 X. It is noteworthy in this context that the D7100 is splash and dust-proof, while the G9X does not feature any corresponding weather-sealing.
The above size and weight comparisons are to some extent incomplete and possibly misleading, as the G9X has a lens built in, whereas the D7100 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 D7100 and their specifications in the Nikon Lens Catalog.
Concerning battery life, the G9X gets 220 shots out of its NB-13L battery, while the D7100 can take 950 images on a single charge of its EN-EL15 power pack. The power pack in the G9X can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.
The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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.
|Canon G9 X||98 mm||58 mm||31 mm||209 g||220||n||Oct 2015||529|
|Nikon D7100||136 mm||107 mm||76 mm||765 g||950||Y||Feb 2013||1,199|
|Canon G9 X Mark II||98 mm||58 mm||31 mm||206 g||235||n||Jan 2017||529|
|Canon SX620||97 mm||57 mm||28 mm||182 g||295||n||May 2016||279|
|Canon G3 X||123 mm||77 mm||105 mm||733 g||300||Y||Jun 2015||999|
|Canon G5 X||112 mm||76 mm||44 mm||353 g||210||n||Oct 2015||799|
|Canon M10||108 mm||67 mm||35 mm||301 g||255||n||Oct 2015||499|
|Canon SX610||105 mm||61 mm||27 mm||191 g||270||n||Jan 2015||249|
|Canon 1200D||130 mm||100 mm||78 mm||480 g||500||n||Feb 2014||449|
|Canon G7 X||103 mm||60 mm||40 mm||304 g||210||n||Sep 2014||699|
|Canon 70D||139 mm||104 mm||79 mm||755 g||920||Y||Jul 2013||1,199|
|Canon S120||100 mm||59 mm||29 mm||217 g||230||n||Aug 2013||449|
|Nikon D7500||136 mm||104 mm||73 mm||720 g||950||Y||Apr 2017||1,299|
|Nikon D500||147 mm||115 mm||81 mm||860 g||1240||Y||Jan 2016||1,999|
|Nikon D7200||136 mm||107 mm||76 mm||765 g||1110||Y||Mar 2015||1,199|
|Nikon 1 J4||100 mm||60 mm||29 mm||232 g||300||n||Apr 2014||549|
|Nikon D7000||132 mm||105 mm||77 mm||780 g||1050||Y||Sep 2010||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. The G9X was launched at a lower price than the D7100, 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 imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Canon G9 X features an one-inch sensor and the Nikon D7100 an APS-C sensor. The sensor area in the D7100 is 216 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.7 and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
With 24MP, the D7100 offers a higher resolution than the G9X (20MP), but the D7100 nevertheless has larger individual pixels (pixel pitch of 3.91μm versus 2.41μm for the G9X) due to its larger sensor. However, the G9X is a much more recent model (by 2 years and 7 months) than the D7100, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the D7100 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Nikon D7100 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the D7100 for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 x 33.9 cm. The corresponding values for the Canon G9 X are 27.4 x 18.2 inches or 69.5 x 46.3 cm for good quality, 21.9 x 14.6 inches or 55.6 x 37.1 cm for very good quality, and 18.2 x 12.2 inches or 46.3 x 30.9 cm for excellent quality prints.
The Canon PowerShot G9 X has a native sensitivity range from ISO 125 to ISO 12800. The corresponding ISO settings for the Nikon D7100 are ISO 100 to ISO 6400, with the possibility to increase the ISO range to 50-25600.
Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 D7100 offers substantially better image quality than the G9X (overall score 20 points higher). The advantage is based on 2.7 bits higher color depth, 1.4 EV in additional dynamic range, and 1.3 stops in additional low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
| DXO |
|Canon G9 X||1-inch||20.0||5472||3648||1080/60p||21.5||12.3||495||63|
|Canon G9 X Mark II||1-inch||20.0||5472||3648||1080/60p||21.9||12.5||522||65|
|Canon G3 X||1-inch||20.0||5472||3648||1080/60p||21.4||12.3||521||63|
|Canon G5 X||1-inch||20.0||5472||3648||1080/60p||..||..||..||..|
|Canon G7 X||1-inch||20.0||5472||3648||1080/60p||23.0||12.7||556||71|
|Nikon 1 J4||1-inch||18.2||5232||3488||1080/60p||20.8||10.7||426||53|
Many modern cameras cannot only take still pictures, but also record videos. 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).
Beyond body and sensor, cameras can and do differ across a range of features. For example, the D7100 has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the G9X relies on live view and the rear LCD for framing. The adjacent table lists some of the other core features of the Canon G9 X and Nikon D7100 along with similar information for a selection of comparators.
|Canon G9 X||none||n||3.0||1040||fixed||Y||1/2000s||6.0||Y||Y|
|Canon G9 X Mark II||none||n||3.0||1040||fixed||Y||1/2000s||8.2||Y||Y|
|Canon G3 X||optional||n||3.2||1620||tilting||Y||1/2000s||5.9||Y||Y|
|Canon G5 X||2360||n||3.0||1040||swivel||Y||1/2000s||5.9||Y||Y|
|Canon G7 X||none||n||3.0||1040||tilting||Y||1/2000s||6.5||Y||Y|
|Nikon 1 J4||none||n||3.0||1037||Fixed||Y||1/4000s||60.0||Y||n|
One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The G9X has a touchscreen, while the D7100 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.
The Canon G9 X and the Nikon D7100 both have 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 G9X and the D7100 write their files to SDXC cards. The D7100 features dual card slots, which can be very useful in case a memory card fails. In contrast, the G9X only has one slot. 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 G9 X and Nikon D7100 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
|Canon G9 X||-||stereo||mono||-||-||micro||2.0||Y||Y||-|
|Canon G9 X Mark II||-||stereo||mono||-||-||micro||2.0||Y||Y||Y|
|Canon G3 X||Y||stereo||mono||Y||Y||mini||2.0||Y||Y||-|
|Canon G5 X||Y||stereo||mono||-||-||mini||2.0||Y||Y||-|
|Canon G7 X||-||stereo||mono||-||-||micro||2.0||Y||Y||-|
|Nikon 1 J4||-||stereo||mono||-||-||mini||2.0||Y||-||-|
It is notable that the G9X offers wifi support, while the D7100 does not. Wifi can be a very convenient means to transfer image data to an off-camera location.
Both the G9X and the D7100 have been discontinued, but can regularly be found used on eBay. The D7100 was replaced by the Nikon D7200, while the G9X was followed by the Canon G9 X 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 and Nikon websites.
So what conclusions can be drawn? Is the Canon G9 X better than the Nikon D7100 or vice versa? A synthesis of the relative strong points of each of the models is listed below.
Arguments in favor of the Canon PowerShot G9 X:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
- Ready to shoot: Comes with a built-in lens, while the D7100 requires a separate lens.
- More compact: Is smaller (98x58mm vs 136x107mm) and thus needs less room in the bag.
- Less heavy: Is lighter even though it comes with a built-in lens (unlike the D7100).
- Easier travel charging: Can be conveniently charged via its USB port.
- Sharper images: Has hand-shake reducing image stabilization built-in.
- 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 2 years and 7 months of technical progress since the D7100 launch.
Advantages of the Nikon D7100:
- More detail: Has more megapixels (24 vs 20MP), which boosts linear resolution by 10%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better image quality: Scores substantially higher (20 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (2.7 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (1.4 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (1.3 stops ISO advantage).
- Better sound: Can connect to an external microphone for higher quality sound recording.
- Better sound control: Has a headphone port that enables audio monitoring while recording.
- Easier framing: Has an optical viewfinder for image composition and settings control.
- Easier setting verification: Features a control panel on top to check shooting parameters.
- 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 (1229k vs 1040k dots).
- Faster shutter: Has higher mechanical shutter speed (1/8000s 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 (950 versus 220) out of a single battery charge.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
- Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
- More heavily discounted: Has been around for much longer (launched in February 2013).
If the count of relative strengths (bullet points above) is taken as a measure, the D7100 is the clear winner of the contest (19 : 11 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 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.
How about other alternatives? Do the specifications of the Canon G9 X and the Nikon D7100 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 G9X or the D7100. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.
This is why expert reviews are important. The following table reports the overall ratings of the cameras as published by some of the major 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 G9 X||+ +||..||4.5/5||4/5||4.5/5||Oct 2015||529|
|Nikon D7100||+ +||85/100||4.5/5||5/5||4.5/5||Feb 2013||1,199|
|Canon G9 X Mark II||..||75/100||4.5/5||4.5/5||4.5/5||Jan 2017||529|
|Canon SX620||..||..||..||..||4/5||May 2016||279|
|Canon G3 X||+||..||4.5/5||3.5/5||4/5||Jun 2015||999|
|Canon G5 X||+ +||78/100||4.5/5||4/5||4.5/5||Oct 2015||799|
|Canon M10||..||..||..||o||4/5||Oct 2015||499|
|Canon SX610||..||..||4/5||..||4/5||Jan 2015||249|
|Canon 1200D||+||..||4/5||4/5||4.5/5||Feb 2014||449|
|Canon G7 X||+ +||77/100||4.5/5||3.5/5||4.5/5||Sep 2014||699|
|Canon 70D||+ +||83/100||4.5/5||4.5/5||5/5||Jul 2013||1,199|
|Canon S120||+ +||..||4.5/5||o||4.5/5||Aug 2013||449|
|Nikon D7500||+ +||86/100||5/5||4.5/5||4.5/5||Apr 2017||1,299|
|Nikon D500||+ +||91/100||4.5/5||5/5||5/5||Jan 2016||1,999|
|Nikon D7200||+ +||84/100||4.5/5||4/5||4.5/5||Mar 2015||1,199|
|Nikon 1 J4||..||..||4.5/5||..||4/5||Apr 2014||549|
|Nikon D7000||..||80/100||4.5/5||5/5||4.5/5||Sep 2010||1,499|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
Care should be taken when interpreting the review scores above, 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 comparisons of ratings among very different cameras or across long time periods 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? 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 G9 X vs Nikon D7100
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 G9 X||Nikon D7100|
|Camera Type||Fixed lens compact camera||Digital single lens reflex|
|Camera Lens||28-84mm f/2.0-4.9||Nikon F mount lenses|
|Launch Date||October 2015||February 2013|
|Launch Price||USD 529||USD 1,199|
|Sensor Specs||Canon G9 X||Nikon D7100|
|Sensor Format||1" Sensor||APS-C Sensor|
|Sensor Size||13.2 x 8.8 mm||23.5 x 15.6 mm|
|Sensor Area||116.16 mm2||366.6 mm2|
|Sensor Diagonal||15.9 mm||28.2 mm|
|Sensor Resolution||20 Megapixels||24 Megapixels|
|Image Resolution||5472 x 3648 pixels||6000 x 4000 pixels|
|Pixel Pitch||2.41 μm||3.91 μm|
|Pixel Density||17.18 MP/cm2||6.55 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||1080/60p Video||1080/60p Video|
|ISO Setting||125 - 12,800 ISO||100 - 6,400 ISO|
|ISO Boost||no Enhancement||50 - 25,600 ISO|
|Image Processor||DIGIC 6||EXPEED 4|
|DXO Sensor Quality (score)||63||83|
|DXO Color Depth (bits)||21.5||24.2|
|DXO Dynamic Range (EV)||12.3||13.7|
|DXO Low Light (ISO)||495||1256|
|Screen Specs||Canon G9 X||Nikon D7100|
|Viewfinder Type||no viewfinder||Optical viewfinder|
|Viewfinder Field of View||100%|
|Top-Level Screen||no Top Display||Control Panel|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.2inch|
|LCD Resolution||1040k dots||1229k dots|
|LCD Attachment||Fixed screen||Fixed screen|
|Touch Input||Touchscreen||no Touchscreen|
|Shooting Specs||Canon G9 X||Nikon D7100|
|Focus System||Contrast-detect AF||Phase-detect AF|
|Manual Focusing Aid||Focus Peaking||no Peaking Feature|
|Continuous Shooting||6 shutter flaps/s||6 shutter flaps/s|
|Time-Lapse Photography||Intervalometer built-in||Intervalometer built-in|
|Fill Flash||Build-in Flash||Build-in Flash|
|Storage Medium||SDXC cards||SDXC cards|
|Second Storage Option||Single card slot||Dual card slots|
|UHS card support||UHS-I||UHS-I|
|Connectivity Specs||Canon G9 X||Nikon D7100|
|External Flash||no Hotshoe||Hotshoe|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||micro HDMI||mini HDMI|
|Microphone Port||no MIC socket||External MIC port|
|Headphone Socket||no Headphone port||Headphone port|
|Wifi Support||Wifi built-in||no Wifi|
|Near-Field Communication||NFC built-in||no NFC|
|Body Specs||Canon G9 X||Nikon D7100|
|Environmental Sealing||not weather sealed||Weathersealed body|
|Battery Life (CIPA)||220 shots per charge||950 shots per charge|
|In-Camera Charging||USB charging||no USB charging|
98 x 58 x 31 mm
(3.9 x 2.3 x 1.2 in)
136 x 107 x 76 mm
(5.4 x 4.2 x 3.0 in)
|Camera Weight||209 g (7.4 oz)||765 g (27.0 oz)|
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