Canon G7 X Mark III vs Nikon D40X
The Canon PowerShot G7 X Mark III and the Nikon D40X are two digital cameras that were announced, respectively, in July 2019 and March 2007. The G7X Mark III is a fixed lens compact, while the D40X is a DSLR. The cameras are based on an one-inch (G7X Mark III) and an APS-C (D40X) sensor. The Canon has a resolution of 20 megapixels, whereas the Nikon provides 10 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Canon G7 X Mark III||Nikon D40X|
|Fixed lens compact camera||Digital single lens reflex|
|24-100mm f/1.8-2.8||Nikon F mount lenses|
|20 MP, 1" Sensor||10 MP, APS-C Sensor|
|4K/30p Video||no Video|
|ISO 125-12,800 (125 - 25,600)||ISO 100-1,600 (100 - 3,200)|
|No viewfinder, LCD framing||Optical viewfinder|
|3.0 LCD, 1040k dots||2.5 LCD, 230k dots|
|Tilting touchscreen||Fixed screen (not touch-sensitive)|
|30 shutter flaps per second||3 shutter flaps per second|
|235 shots per battery charge||520 shots per battery charge|
|105 x 61 x 41 mm, 304 g||124 x 94 x 64 mm, 522 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon PowerShot G7 X Mark III and the Nikon D40X? 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 G7 X Mark III and the Nikon D40X is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth measures are rounded to the nearest millimeter.
Both cameras are available in two different colors (black, silver).
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Nikon D40X is considerably larger (82 percent) than the Canon G7 X Mark III. In this context, it is worth noting that neither the G7X Mark III nor the D40X are weather-sealed.
The above size and weight comparisons are to some extent incomplete and possibly misleading, as the G7X Mark III has a lens built in, whereas the D40X 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 D40X and their specifications in the Nikon Lens Catalog.
Concerning battery life, the G7X Mark III gets 235 shots out of its NB-13L battery, while the D40X can take 520 images on a single charge of its EN-EL9 power pack. The power pack in the G7X Mark III can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.
The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you would like to visualize and compare a different camera combination, just use the right or left arrows in the table to switch to the respective camera. Alternatively, you can also navigate to the CAM-parator app and make your selection from the full list of cameras there.
|Canon G7 X Mark III||105 mm||61 mm||41 mm||304 g||235||n||Jul 2019||749|
|Nikon D40X||124 mm||94 mm||64 mm||522 g||520||n||Mar 2007||729|
|Canon G5 X Mark II||111 mm||61 mm||46 mm||340 g||230||n||Jul 2019||899|
|Canon M50||116 mm||88 mm||59 mm||390 g||235||n||Feb 2018||779|
|Canon SX740||110 mm||64 mm||40 mm||299 g||265||n||Jul 2018||399|
|Canon G7 X Mark II||106 mm||61 mm||42 mm||319 g||265||n||Feb 2016||699|
|Canon G5 X||112 mm||76 mm||44 mm||353 g||210||n||Oct 2015||799|
|Canon G7 X||103 mm||60 mm||40 mm||304 g||210||n||Sep 2014||699|
|Fujifilm XF10||113 mm||64 mm||41 mm||279 g||330||n||Jul 2018||499|
|Nikon D3000||126 mm||97 mm||64 mm||536 g||500||n||Jul 2009||599|
|Nikon D5000||127 mm||104 mm||80 mm||590 g||510||n||Apr 2009||749|
|Nikon D60||126 mm||94 mm||64 mm||522 g||500||n||Jan 2008||629|
|Nikon D40||124 mm||94 mm||64 mm||522 g||470||n||Nov 2006||499|
|Panasonic TZ200||111 mm||65 mm||45 mm||340 g||370||n||Feb 2018||799|
|Panasonic L10||135 mm||96 mm||78 mm||556 g||450||n||Aug 2007||599|
|Sony ZV-1||105 mm||60 mm||44 mm||294 g||260||n||May 2020||799|
|Sony RX100 VI||102 mm||58 mm||43 mm||301 g||240||n||Jun 2018||1,199|
Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
(1) Number of images that can be taken on a full battery charge according to the CIPA-standard; (2) Official announcement.
Any camera decision will naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.
The size of the imaging sensor is a crucial determinant of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have 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 tend to be associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Canon G7 X Mark III features an one-inch sensor and the Nikon D40X an APS-C sensor. The sensor area in the D40X is 222 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.
Despite having a smaller sensor, the Canon G7 X Mark III offers a higher resolution of 20 megapixels, compared with 10 MP of the Nikon D40X. 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 6.11μm for the D40X). However, it should be noted that the G7X Mark III is much more recent (by 12 years and 4 months) than the D40X, 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 G7 X Mark III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the G7X Mark III 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 Nikon D40X are 19.4 x 13 inches or 49.2 x 32.9 cm for good quality, 15.5 x 10.4 inches or 39.3 x 26.3 cm for very good quality, and 12.9 x 8.6 inches or 32.8 x 21.9 cm for excellent quality prints.
The Canon PowerShot G7 X Mark III has a native sensitivity range from ISO 125 to ISO 12800, which can be extended to ISO 125-25600. The corresponding ISO settings for the Nikon D40X are ISO 100 to ISO 1600, with the possibility to increase the ISO range to 100-3200.
Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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"). The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
|Canon G7 X Mark III||1-inch||20.0||5472||3648||4K/30p||..||..||..||..|
|Canon G5 X Mark II||1-inch||20.0||5472||3648||4K/30p||..||..||..||..|
|Canon G7 X Mark II||1-inch||20.0||5472||3648||1080/60p||..||..||..||..|
|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|
|Panasonic L10||Four Thirds||10.0||3648||2736||none||21.3||10.8||429||55|
|Sony RX100 VI||1-inch||20.0||5472||3648||4K/30p||..||..||..||..|
Many modern cameras are not only capable of taking still images, but can also record movies. The G7X Mark III indeed provides movie recording capabilities, while the D40X does not. The highest resolution format that the G7X Mark III can use is 4K/30p.
Apart from body and sensor, cameras can and do differ across a range of features. For example, the D40X has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the G7X Mark III relies on live view and the rear LCD for framing. The table below summarizes some of the other core capabilities of the Canon G7 X Mark III and Nikon D40X in connection with corresponding information for a sample of similar cameras.
|Canon G7 X Mark III||none||n||3.0||1040||tilting||Y||1/2000s||30||Y||Y|
|Canon G5 X Mark II||2360||n||3.0||1040||tilting||Y||1/2000s||30||Y||Y|
|Canon G7 X Mark II||none||n||3.0||1040||tilting||Y||1/2000s||8.0||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|
|Sony RX100 VI||2359||n||3.0||1229||tilting||Y||1/2000s||24.0||Y||Y|
One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The G7X Mark III has a touchscreen, while the D40X has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.The G7X Mark III 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 D40X 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 G7X Mark III 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 G7 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 G7X Mark III writes its imaging data to SDXC cards, while the D40X uses SDHC cards. The G7X Mark III supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the D40X cannot take advantage of Ultra High Speed SD 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 PowerShot G7 X Mark III and Nikon D40X and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
|Canon G7 X Mark III||-||stereo||mono||Y||-||micro||3.1||Y||-||Y|
|Canon G5 X Mark II||-||stereo||mono||-||-||micro||3.1||Y||-||Y|
|Canon G7 X Mark II||-||stereo||mono||-||-||micro||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||-|
|Sony RX100 VI||-||stereo||mono||-||-||micro||2.0||Y||Y||Y|
It is notable that the G7X Mark III offers wifi support, while the D40X does not. Wifi can be a very convenient means to transfer image data to an off-camera location.
The G7X Mark III is a recent model that features in the current product line-up of Canon. In contrast, the D40X has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the D40X was succeeded by the Nikon D60 . 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 G7 X Mark III better than the Nikon D40X or vice versa? The listing below highlights the relative strengths of the two models.
Advantages of the Canon PowerShot G7 X Mark III:
- More detail: Offers more megapixels (20 vs 10MP) with a 41% higher linear resolution.
- Broader imaging potential: Can record not only still images but also 4K/30p movies.
- Larger screen: Has a bigger rear LCD (3.0" vs 2.5") for image review and settings control.
- More detailed LCD: Has a higher resolution rear screen (1040k vs 230k dots).
- More flexible LCD: Has a tilting screen for odd-angle shots in 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 (30 vs 3 flaps/sec) to capture the decisive moment.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- Ready to shoot: Comes with a built-in lens, while the D40X requires a separate lens.
- More compact: Is smaller (105x61mm vs 124x94mm) and thus needs less room in the bag.
- Less heavy: Is lighter even though it comes with a built-in lens (unlike the D40X).
- Easier travel charging: Can be conveniently charged via its USB port.
- Sharper images: Has hand-shake reducing image stabilization built-in.
- Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
- More modern: Reflects 12 years and 4 months of technical progress since the D40X launch.
Reasons to prefer the Nikon D40X:
- Easier framing: Has an optical viewfinder for image composition and settings control.
- 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 (520 versus 235) out of a single battery charge.
- Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
- More heavily discounted: Has been around for much longer (launched in March 2007).
If the number of relative strengths (bullet points above) is taken as a guide, the G7X Mark III is the clear winner of the match-up (19 : 6 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 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 G7 X Mark III and the Nikon D40X 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 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 G7X Mark III or the D40X perform in practice. 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 hands-on reviews by experts 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 G7 X Mark III||+ +||81/100||4/5||..||..||Jul 2019||749|
|Nikon D40X||79/100||+ +||4/5||o||4/5||Mar 2007||729|
|Canon G5 X Mark II||+||82/100||..||..||4/5||Jul 2019||899|
|Canon M50||+||79/100||..||4/5||3.5/5||Feb 2018||779|
|Canon SX740||+||..||4/5||..||4/5||Jul 2018||399|
|Canon G7 X Mark II||+ +||81/100||4.5/5||4/5||4.5/5||Feb 2016||699|
|Canon G5 X||+ +||78/100||4.5/5||4/5||4.5/5||Oct 2015||799|
|Canon G7 X||+ +||77/100||4.5/5||3.5/5||4.5/5||Sep 2014||699|
|Fujifilm XF10||..||75/100||4/5||..||4.5/5||Jul 2018||499|
|Nikon D3000||+||72/100||4/5||3.5/5||4.5/5||Jul 2009||599|
|Nikon D5000||+ +||75/100||4/5||5/5||4.5/5||Apr 2009||749|
|Nikon D60||80/100||+ +||4/5||o||4.5/5||Jan 2008||629|
|Nikon D40||81/100||+ +||o||5/5||4.5/5||Nov 2006||499|
|Panasonic TZ200||+ +||81/100||4.5/5||..||4.5/5||Feb 2018||799|
|Panasonic L10||85/100||+||3.5/5||o||4/5||Aug 2007||599|
|Sony ZV-1||..||85/100||4/5||..||4.5/5||May 2020||799|
|Sony RX100 VI||+ +||83/100||4/5||..||4.5/5||Jun 2018||1,199|
|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, 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 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 80D vs Nikon D40X
- Canon G3 X vs Nikon D40X
- Canon G7 X Mark III vs Canon M200
- Canon G7 X Mark III vs Canon M3
- Canon G7 X Mark III vs Fujifilm X70
- Canon G7 X Mark III vs Panasonic G1
- Canon G7 X Mark III vs Panasonic GF5
- Canon SL3 vs Nikon D40X
- Canon XSi vs Nikon D40X
- Fujifilm X-A7 vs Nikon D40X
- Fujifilm X100S vs Nikon D40X
- Nikon D40X vs Panasonic TZ90
Specifications: Canon G7 X Mark III vs Nikon D40X
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 G7 X Mark III||Nikon D40X|
|Camera Type||Fixed lens compact camera||Digital single lens reflex|
|Camera Lens||24-100mm f/1.8-2.8||Nikon F mount lenses|
|Launch Date||July 2019||March 2007|
|Launch Price||USD 749||USD 729|
|Sensor Specs||Canon G7 X Mark III||Nikon D40X|
|Sensor Format||1" Sensor||APS-C Sensor|
|Sensor Size||13.2 x 8.8 mm||23.6 x 15.8 mm|
|Sensor Area||116.16 mm2||372.88 mm2|
|Sensor Diagonal||15.9 mm||28.4 mm|
|Sensor Resolution||20 Megapixels||10 Megapixels|
|Image Resolution||5472 x 3648 pixels||3872 x 2592 pixels|
|Pixel Pitch||2.41 μm||6.11 μm|
|Pixel Density||17.18 MP/cm2||2.69 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||4K/30p Video||no Video|
|ISO Setting||125 - 12,800 ISO||100 - 1,600 ISO|
|ISO Boost||125 - 25,600 ISO||100 - 3,200 ISO|
|Image Processor||DIGIC 8||EXPEED|
|DXO Sensor Quality (score)||..||63|
|DXO Color Depth (bits)||..||22.4|
|DXO Dynamic Range (EV)||..||11.4|
|DXO Low Light (ISO)||..||516|
|Screen Specs||Canon G7 X Mark III||Nikon D40X|
|Viewfinder Type||no viewfinder||Optical viewfinder|
|Viewfinder Field of View||95%|
|LCD Framing||Live View|
|Rear LCD Size||3.0inch||2.5inch|
|LCD Resolution||1040k dots||230k dots|
|LCD Attachment||Tilting screen||Fixed screen|
|Touch Input||Touchscreen||no Touchscreen|
|Shooting Specs||Canon G7 X Mark III||Nikon D40X|
|Focus System||Contrast-detect AF||Phase-detect AF|
|Manual Focusing Aid||Focus Peaking||no Peaking Feature|
|Continuous Shooting||30 shutter flaps/s||3 shutter flaps/s|
|Electronic Shutter||up to 1/25600s||no E-Shutter|
|Time-Lapse Photography||Intervalometer built-in||no Intervalometer|
|Fill Flash||Build-in Flash||Build-in Flash|
|Storage Medium||SDXC cards||SDHC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||UHS-I||no|
|Connectivity Specs||Canon G7 X Mark III||Nikon D40X|
|External Flash||no Hotshoe||Hotshoe|
|USB Connector||USB 3.1||USB 2.0|
|HDMI Port||micro HDMI||no HDMI|
|Microphone Port||External MIC port||no MIC socket|
|Wifi Support||Wifi built-in||no Wifi|
|Bluetooth Support||Bluetooth built-in||no Bluetooth|
|Body Specs||Canon G7 X Mark III||Nikon D40X|
|Battery Life (CIPA)||235 shots per charge||520 shots per charge|
|In-Camera Charging||USB charging||no USB charging|
105 x 61 x 41 mm
(4.1 x 2.4 x 1.6 in)
124 x 94 x 64 mm
(4.9 x 3.7 x 2.5 in)
|Camera Weight||304 g (10.7 oz)||522 g (18.4 oz)|
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