Canon 40D vs G7X
The Canon EOS 40D and the Canon PowerShot G7 X are two digital cameras that were officially introduced, respectively, in August 2007 and September 2014. The 40D is a DSLR, while the G7X is a fixed lens compact. The cameras are based on an APS-C (40D) and an one-inch (G7X) sensor. The 40D has a resolution of 10.1 megapixels, whereas the G7X provides 20 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Canon 40D||Canon G7 X|
|Digital single lens reflex||Fixed lens compact camera|
|Canon EF mount lenses||24-100mm f/1.8-2.8|
|10.1 MP, APS-C Sensor||20 MP, 1" Sensor|
|no Video||1080/60p Video|
|ISO 100-1600 (100-3200)||ISO 125-12800|
|Optical viewfinder||No viewfinder, LCD framing|
|3.0" LCD, 230k dots||3.0" LCD, 1040k dots|
|Fixed screen (not touch-sensitive)||Tilting touchscreen|
|6.5 shutter flaps per second||6.5 shutter flaps per second|
|750 shots per battery charge||210 shots per battery charge|
|146 x 108 x 74 mm, 822 g||103 x 60 x 40 mm, 304 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 40D and the Canon PowerShot G7 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 40D and the Canon G7 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 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 G7 X is considerably smaller (61 percent) than the Canon 40D. In this context, it is worth noting that neither the 40D nor the G7X are weather-sealed.
The above size and weight comparisons are to some extent incomplete and possibly misleading, as the G7X has a lens built in, whereas the 40D 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 40D and their specifications in the Canon EF Lens Catalog.
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, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.
|Canon 40D»||5.7 in||4.3 in||2.9 in||29.0 oz||750||n||Aug 2007||1,299||Canon 40D|
|Canon G7 X«||4.1 in||2.4 in||1.6 in||10.7 oz||210||n||Sep 2014||699||Canon G7 X|
|Canon G7 X Mark II« »||4.2 in||2.4 in||1.7 in||11.3 oz||265||n||Feb 2016||699||Canon G7 X Mark II|
|Canon G5 X« »||4.4 in||3.0 in||1.7 in||12.5 oz||210||n||Oct 2015||799||Canon G5 X|
|Canon G9 X« »||3.9 in||2.3 in||1.2 in||7.4 oz||220||n||Oct 2015||529||Canon G9 X|
|Canon M3« »||4.4 in||2.7 in||1.7 in||12.9 oz||250||n||Feb 2015||679||Canon M3|
|Canon T3« »||5.1 in||3.9 in||3.1 in||17.5 oz||700||n||Feb 2011||449||Canon T3|
|Canon 60D« »||5.7 in||4.2 in||3.1 in||26.6 oz||1100||Y||Aug 2010||1,399||Canon 60D|
|Canon 50D« »||5.7 in||4.3 in||2.9 in||29.0 oz||800||Y||Aug 2008||1,299||Canon 50D|
|Canon XS« »||5.0 in||3.9 in||2.6 in||17.7 oz||500||n||Jun 2008||449||Canon XS|
|Canon XSi« »||5.1 in||3.9 in||2.4 in||18.5 oz||500||n||Jan 2008||799||Canon XSi|
|Canon 30D« »||5.7 in||4.2 in||2.9 in||27.7 oz||750||n||Feb 2006||1,399||Canon 30D|
|Canon XTi« »||5.0 in||3.3 in||2.6 in||19.6 oz||370||n||Aug 2006||799||Canon XTi|
|Canon 20D« »||5.7 in||4.2 in||2.8 in||27.2 oz||700||n||Aug 2004||1,499||Canon 20D|
|Canon 10D« »||5.9 in||4.2 in||3.0 in||30.0 oz||500||n||Feb 2003||1,999||Canon 10D|
|Nikon D90« »||5.2 in||4.1 in||3.0 in||24.8 oz||850||n||Aug 2008||1,299||Nikon D90|
|Sony RX100 II« »||4.0 in||2.3 in||1.5 in||9.9 oz||350||n||Jun 2013||749||Sony RX100 II|
|Note: Measurements and pricing do not include easily detachable parts, such as 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 G7X was launched at a lower price than the 40D, despite having a lens built in. 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 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. 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 more expensive and lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Canon 40D features an APS-C sensor and the Canon G7 X an one-inch sensor. The sensor area in the G7X 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.
Technology-wise, the G7X uses a more advanced image processing engine (DIGIC 6) than the 40D (DIGIC 3), with benefits for noise reduction, color accuracy, and processing speed.
Despite having a smaller sensor, the G7X offers a higher resolution of 20 megapixels, compared with 10.1 MP of the 40D. 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 5.73μm for the 40D). However, it should be noted that the G7X is much more recent (by 7 years) than the 40D, 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 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the G7X for good quality output (200 dots per inch) amounts to 27.4 x 18.2 inch or 69.5 x 46.3 cm, for very good quality (250 dpi) 21.9 x 14.6 inch or 55.6 x 37.1 cm, and for excellent quality (300 dpi) 18.2 x 12.2 inch or 46.3 x 30.9 cm. The corresponding values for the Canon 40D are 19.4 x 13 inch or 49.4 x 32.9 cm for good quality, 15.6 x 10.4 inch or 39.5 x 26.3 cm for very good quality, and 13 x 8.6 inch or 32.9 x 21.9 cm for excellent quality prints.
The Canon EOS 40D has a native sensitivity range from ISO 100 to ISO 1600, which can be extended to ISO 100-3200. The corresponding ISO settings for the Canon PowerShot G7 X are ISO 125 to ISO 12800 (no boost).
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. Of the two cameras under consideration, the G7X has a markedly higher DXO score than the 40D (overall score 7 points higher), which will translate into better image quality. The advantage is based on 0.9 bits higher color depth, 1.4 EV in additional dynamic range, and 0.3 stops of reduced low light sensitivity. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
|Canon 40D||APS-C||10.1||3888||2592||none||22.1||11.3||703||64||Canon 40D|
|Canon G7 X||1-inch||20.0||5472||3648||1080/60p||23.0||12.7||556||71||Canon G7 X|
|Canon G7 X Mark II||1-inch||20.0||5472||3648||1080/60p||..||..||..||..||Canon G7 X Mark II|
|Canon G5 X||1-inch||20.0||5472||3648||1080/60p||..||..||..||..||Canon G5 X|
|Canon G9 X||1-inch||20.0||5472||3648||1080/60p||21.5||12.3||495||63||Canon G9 X|
|Canon M3||APS-C||24.0||6000||4000||1080/30p||22.8||11.8||1169||72||Canon M3|
|Canon T3||APS-C||12.2||4272||2848||720/30p||21.9||11.0||755||62||Canon T3|
|Canon 60D||APS-C||17.9||5184||3456||1080/30p||22.2||11.5||813||66||Canon 60D|
|Canon 50D||APS-C||15.1||4752||3168||none||21.8||11.4||696||63||Canon 50D|
|Canon XS||APS-C||10.1||3888||2592||none||..||..||..||..||Canon XS|
|Canon XSi||APS-C||12.2||4272||2848||none||21.9||10.8||692||61||Canon XSi|
|Canon 30D||APS-C||8.2||3504||2336||none||21.5||10.8||736||59||Canon 30D|
|Canon XTi||APS-C||10.1||3888||2592||none||22.1||11.0||664||62||Canon XTi|
|Canon 20D||APS-C||8.2||3504||2336||none||21.9||11.0||721||62||Canon 20D|
|Canon 10D||APS-C||6.3||3072||2048||none||21.1||10.9||571||57||Canon 10D|
|Nikon D90||APS-C||12.2||4288||2848||720/24p||22.7||12.5||977||73||Nikon D90|
|Sony RX100 II||1-inch||20.0||5472||3648||1080/60p||22.5||12.4||483||67||Sony RX100 II|
Many modern cameras cannot only take still pictures, but also record videos. The G7X indeed provides for movie recording, while the 40D does not. The highest resolution format that the G7X can use is 1080/60p.
Apart from body and sensor, cameras can and do differ across a range of features. For example, the 40D has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the G7X relies on live view and the rear LCD for framing. The table below summarizes some of the other core capabilities of the Canon 40D and Canon G7 X in connection with corresponding information for a sample of similar cameras.
|Canon 40D||optical||Y||3.0||230||fixed||n||1/8000s||6.5||Y||n||Canon 40D|
|Canon G7 X||none||n||3.0||1040||tilting||Y||1/2000s||6.5||Y||Y||Canon G7 X|
|Canon G7 X Mark II||none||n||3.0||1040||tilting||Y||1/2000s||8.0||Y||Y||Canon G7 X Mark II|
|Canon G5 X||2360||n||3.0||1040||swivel||Y||1/2000s||5.9||Y||Y||Canon G5 X|
|Canon G9 X||none||n||3.0||1040||fixed||Y||1/2000s||6.0||Y||Y||Canon G9 X|
|Canon M3||optional||n||3.0||1040||tilting||Y||1/4000s||4.2||Y||n||Canon M3|
|Canon T3||optical||n||2.7||230||fixed||n||1/4000s||3.0||Y||n||Canon T3|
|Canon 60D||optical||Y||3.0||1040||swivel||n||1/8000s||5.3||Y||n||Canon 60D|
|Canon 50D||optical||Y||3.0||920||fixed||n||1/8000s||6.3||Y||n||Canon 50D|
|Canon XS||optical||n||2.5||230||fixed||n||1/4000s||3.0||Y||n||Canon XS|
|Canon XSi||optical||n||3.0||230||fixed||n||1/4000s||3.5||Y||n||Canon XSi|
|Canon 30D||optical||Y||2.5||230||fixed||n||1/8000s||5.0||Y||n||Canon 30D|
|Canon XTi||optical||n||2.5||230||fixed||n||1/4000s||3.0||Y||n||Canon XTi|
|Canon 20D||optical||Y||1.8||118||fixed||n||1/8000s||5.0||Y||n||Canon 20D|
|Canon 10D||optical||Y||1.8||118||fixed||n||1/4000s||3.0||Y||n||Canon 10D|
|Nikon D90||optical||Y||3.0||920||fixed||n||1/4000s||4.5||Y||n||Nikon D90|
|Sony RX100 II||optional||n||3.0||1229||tilting||n||1/2000s||10.0||Y||Y||Sony RX100 II|
One feature that is present on the 40D, but is missing on the G7X 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 G7X 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 40D does not have a selfie-screen.
The Canon G7 X 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 40D writes its imaging data to Compact Flash cards, while the G7X 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 40D and Canon PowerShot G7 X and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Canon 40D||Y||none||none||-||-||none||2.0||-||-||-||Canon 40D|
|Canon G7 X||-||stereo||mono||-||-||micro||2.0||Y||Y||-||Canon G7 X|
|Canon G7 X Mark II||-||stereo||mono||-||-||micro||2.0||Y||Y||-||Canon G7 X Mark II|
|Canon G5 X||Y||stereo||mono||-||-||mini||2.0||Y||Y||-||Canon G5 X|
|Canon G9 X||-||stereo||mono||-||-||micro||2.0||Y||Y||-||Canon G9 X|
|Canon M3||Y||stereo||mono||Y||-||mini||2.0||Y||Y||-||Canon M3|
|Canon T3||Y||stereo||mono||-||-||mini||2.0||-||-||-||Canon T3|
|Canon 60D||Y||mono||mono||Y||-||mini||2.0||-||-||-||Canon 60D|
|Canon 50D||Y||none||none||-||-||mini||2.0||-||-||-||Canon 50D|
|Canon XS||Y||none||none||-||-||none||2.0||-||-||-||Canon XS|
|Canon XSi||Y||none||none||-||-||mini||2.0||-||-||-||Canon XSi|
|Canon 30D||Y||none||none||-||-||none||2.0||-||-||-||Canon 30D|
|Canon XTi||Y||none||none||-||-||none||2.0||-||-||-||Canon XTi|
|Canon 20D||Y||none||none||-||-||none||1.1||-||-||-||Canon 20D|
|Canon 10D||Y||none||none||-||-||none||1.1||-||-||-||Canon 10D|
|Nikon D90||Y||mono||mono||-||-||mini||2.0||-||-||-||Nikon D90|
|Sony RX100 II||Y||stereo||mono||-||-||micro||2.0||Y||Y||-||Sony RX100 II|
It is notable that the 40D has a hotshoe, while the G7X does not. This socket makes it possible to easily attach optional accessories, such as an external flash gun.
Studio photographers will appreciate that the Canon 40D (unlike the G7X) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the 40D and the G7X have been discontinued, but can regularly be found used on eBay. The 40D was replaced by the Canon 50D, while the G7X was followed by the Canon G7 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 website.
So what conclusions can be drawn? Is the Canon 40D better than the Canon G7 X or vice versa? The listing below highlights the relative strengths of the two models.
Advantages of the Canon EOS 40D:
- Better low-light sensitivity: Requires less light for good images (0.3 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.
- More flexible: Can take a variety of interchangeable lenses, including specialty optics.
- Longer lasting: Can take more shots (750 versus 210) on a single battery charge.
- Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
- 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 August 2007).
Reasons to prefer the Canon PowerShot G7 X:
- More detail: Has more megapixels (20 vs 10.1MP), which boosts linear resolution by 41%.
- Better image quality: Scores markedly higher (7 points) in the DXO overall evaluation.
- More dynamic range: Captures a broader range of light and dark details (1.4 EV of extra DR).
- Better jpgs: Has a more modern image processing engine (DIGIC 6 vs DIGIC 3).
- Broader imaging potential: Can capture not only stills but also 1080/60p video.
- 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: Has a touchscreen to facilitate handling and shooting adjustments.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- Ready to shoot: Comes with an integrated lens, while the 40D requires a separate lens.
- More compact: Is smaller (103x60mm vs 146x108mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight even though it has a lens built in (unlike the 40D).
- 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 7 years of technical progress since the 40D launch.
If the number of relative strengths (bullet points above) is taken as a guide, the G7X is the clear winner of the contest (18 : 9 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 40D and the Canon G7 X place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Travel-Zoom 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 40D or the G7X 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 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.
The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. It should also be noted that some of the review sites have over time altered the way they render their verdicts.
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 40D vs Fujifilm X-T100
- Canon 40D vs Panasonic GF3
- Canon 500D vs Canon G7 X Mark II
- Canon G7 X Mark II vs Sony A58
- Canon G7 X Mark III vs Canon G9 X Mark II
- Canon G7 X Mark III vs Canon M5
- Canon G7 X Mark III vs Nikon D850
- Canon G7 X Mark III vs Panasonic FZ300
- Canon G7 X Mark III vs Panasonic L1
- Canon G7 X vs Fujifilm X-Pro2
- Canon G7 X vs Samsung NX1
- Canon G7 X vs Sony HX400V
Specifications: Canon 40D vs Canon G7 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 40D||Canon G7 X|
|Camera Type||Digital single lens reflex||Fixed lens compact camera|
|Camera Lens||Canon EF mount lenses||24-100mm f/1.8-2.8|
|Launch Date||August 2007||September 2014|
|Launch Price||USD 1299||USD 699|
|Sensor Specs||Canon 40D||Canon G7 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||10.1 Megapixels||20 Megapixels|
|Image Resolution||3888 x 2592 pixels||5472 x 3648 pixels|
|Pixel Pitch||5.73 μm||2.41 μm|
|Pixel Density||3.03 MP/cm2||17.18 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||no Video||1080/60p Video|
|ISO Setting||100-1600 ISO||125-12800 ISO|
|ISO Boost||100-3200 ISO||no Enhancement|
|Image Processor||DIGIC 3||DIGIC 6|
|DXO Sensor Quality (score)||64||71|
|DXO Color Depth (bits)||22.1||23.0|
|DXO Dynamic Range (EV)||11.3||12.7|
|DXO Low Light (ISO)||703||556|
|Screen Specs||Canon 40D||Canon G7 X|
|Viewfinder Type||Optical viewfinder||No viewfinder|
|Viewfinder Field of View||95%|
|Top-Level Screen||Control Panel||no Top Display|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0 inch||3.0 inch|
|LCD Resolution||230k dots||1040k dots|
|LCD Attachment||Fixed screen||Tilting screen|
|Touch Input||no Touchscreen||Touchscreen|
|Shooting Specs||Canon 40D||Canon G7 X|
|Autofocus System||Phase-detect AF||Contrast-detect AF|
|Manual Focusing Aid||No Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/8000/s||1/2000/s|
|Continuous Shooting||6.5 shutter flaps/s||6.5 shutter flaps/s|
|Time-Lapse Photography||no Intervalometer||Intervalometer built-in|
|Fill Flash||Build-in Flash||Build-in Flash|
|Storage Medium||CF cards||SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|Connectivity Specs||Canon 40D||Canon G7 X|
|External Flash||Hotshoe||no Hotshoe|
|Studio Flash||PC Sync socket||no PC Sync|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||no HDMI||micro HDMI|
|Wifi Support||no Wifi||Wifi built-in|
|Near-Field Communication||no NFC||NFC built-in|
|Body Specs||Canon 40D||Canon G7 X|
|Battery Life (CIPA)||750 shots per charge||210 shots per charge|
146 x 108 x 74 mm
(5.7 x 4.3 x 2.9 in)
103 x 60 x 40 mm
(4.1 x 2.4 x 1.6 in)
|Camera Weight||822 g (29.0 oz)||304 g (10.7 oz)|
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