Canon 40D vs Nikon D7100
The Canon EOS 40D and the Nikon D7100 are two enthusiast cameras that were announced, respectively, in August 2007 and February 2013. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The Canon has a resolution of 10.1 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 EOS 40D 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.
The side-by-side display below illustrates the physical size and weight of the Canon 40D and the Nikon D7100. 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 measures 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 Nikon D7100 is notably smaller (8 percent) than the Canon 40D. Moreover, the D7100 is markedly lighter (7 percent) than the 40D. It is noteworthy in this context that the D7100 is splash and dust-proof, while the 40D does not feature any corresponding weather-sealing.
The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. Yet, since both cameras are based around an APS-C sensor, their respective lenses will tend to have similar dimensions and heft. You can compare the optics available for the two cameras in the Canon EF Lens Catalog (40D) and the Nikon Lens Catalog (D7100).
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 40D||146 mm||108 mm||74 mm||822 g||750||n||Aug 2007||1,299|
|2.||Nikon D7100||136 mm||107 mm||76 mm||765 g||950||Y||Feb 2013||1,199|
|3.||Canon 70D||139 mm||104 mm||79 mm||755 g||920||Y||Jul 2013||1,199|
|4.||Canon 1100D||130 mm||100 mm||78 mm||495 g||700||n||Feb 2011||449|
|5.||Canon 60D||145 mm||106 mm||79 mm||755 g||1100||Y||Aug 2010||1,399|
|6.||Canon 50D||146 mm||108 mm||74 mm||822 g||800||Y||Aug 2008||1,299|
|7.||Canon 450D||129 mm||98 mm||62 mm||524 g||500||n||Jan 2008||799|
|8.||Canon 30D||144 mm||106 mm||74 mm||785 g||750||n||Feb 2006||1,399|
|9.||Canon 400D||127 mm||84 mm||65 mm||556 g||370||n||Aug 2006||799|
|10.||Canon 20D||144 mm||106 mm||72 mm||770 g||700||n||Aug 2004||1,499|
|11.||Nikon D7500||136 mm||104 mm||73 mm||720 g||950||Y||Apr 2017||1,299|
|12.||Nikon D500||147 mm||115 mm||81 mm||860 g||1240||Y||Jan 2016||1,999|
|13.||Nikon D7200||136 mm||107 mm||76 mm||765 g||1110||Y||Mar 2015||1,199|
|14.||Nikon D7000||132 mm||105 mm||77 mm||780 g||1050||Y||Sep 2010||1,499|
|15.||Nikon D90||132 mm||103 mm||77 mm||703 g||850||n||Aug 2008||1,299|
|16.||Olympus E-30||142 mm||108 mm||75 mm||701 g||750||n||Nov 2008||1,299|
|Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
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. The D7100 was somewhat cheaper (by 8 percent) than the 40D at launch, but both cameras fall into the same price category. 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. 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, but their sensors differ slightly in size. The sensor area in the D7100 is 11 percent bigger. As a result of these sensor size differences, the cameras have format factors, respectively, of 1.6 (40D) 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 40D (10.1MP), but the D7100 has smaller individual pixels (pixel pitch of 3.91μm versus 5.73μm for the 40D). Yet, the D7100 is a much more recent model (by 5 years and 6 months) than the 40D, 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 40D are 19.4 x 13 inches or 49.4 x 32.9 cm for good quality, 15.6 x 10.4 inches or 39.5 x 26.3 cm for very good quality, and 13 x 8.6 inches 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 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 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 D7100 offers substantially better image quality than the 40D (overall score 19 points higher). The advantage is based on 2.1 bits higher color depth, 2.4 EV in additional dynamic range, and 0.8 stops in additional 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.
| DXO |
|16.||Olympus E-30||Four Thirds||12.2||4032||3024||none||21.3||10.4||530||55|
Many modern cameras are not only capable of taking still images, but can also record movies. The D7100 indeed provides for movie recording, while the 40D does not. The highest resolution format that the D7100 can use is 1080/60p.
Apart from body and sensor, cameras can and do differ across a variety of features. The 40D and the D7100 are similar in the sense that both have an optical viewfinder. The latter is useful for getting a clear image for framing even in brightly lit environments. The viewfinder in the D7100 offers a wider field of view (100%) than the one in the 40D (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the D7100 has a higher magnification (0.63x vs 0.59x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Canon 40D, the Nikon D7100, and comparable cameras.
The Nikon D7100 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 D7100 uses SDXC cards. The D7100 features dual card slots, which can be very useful in case a memory card fails. In contrast, the 40D only has one slot.
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 Nikon D7100 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
Studio photographers will appreciate that the Canon 40D (unlike the D7100) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the 40D and the D7100 have been discontinued, but can regularly be found used on eBay. The 40D was replaced by the Canon 50D, while the D7100 was followed by the Nikon D7200. 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 is the bottom line? Is the Canon 40D better than the Nikon D7100 or vice versa? The listing below highlights the relative strengths of the two models.
Reasons to prefer the Canon EOS 40D:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- 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).
Arguments in favor of the Nikon D7100:
- More detail: Has more megapixels (24 vs 10.1MP), which boosts linear resolution by 54%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better image quality: Scores substantially higher (19 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (2.1 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (2.4 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (0.8 stops ISO advantage).
- Broader imaging potential: Can capture not only stills but also 1080/60p video.
- More complete view: Has a viewfinder with a larger field of view (100% vs 95%).
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.63x vs 0.59x).
- 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 230k dots).
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- Longer lasting: Gets more shots (950 versus 750) out of a single battery charge.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
- More modern: Reflects 5 years and 6 months of technical progress since the 40D launch.
If the count of relative strengths (bullet points above) is taken as a measure, the D7100 is the clear winner of the contest (16 : 3 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 40D and the Nikon D7100 place the cameras among the top in their class? Find out in the latest Best DSLR Camera listing 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 40D 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 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 (amateurphotographer [AP], cameralabs [CL], 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 40D||..||+ +||+ +||4.5/5||4.5/5||Aug 2007||1,299|
|2.||Nikon D7100||5/5||+ +||85/100||4.5/5||4.5/5||Feb 2013||1,199|
|3.||Canon 70D||5/5||+ +||83/100||4.5/5||5/5||Jul 2013||1,199|
|4.||Canon 1100D||..||80/100||69/100||4/5||4.5/5||Feb 2011||449|
|5.||Canon 60D||5/5||+||79/100||4/5||4.5/5||Aug 2010||1,399|
|6.||Canon 50D||..||+ +||+ +||4.5/5||4.5/5||Aug 2008||1,299|
|7.||Canon 450D||..||+ +||+ +||4/5||4.5/5||Jan 2008||799|
|8.||Canon 30D||..||+ +||+ +||o||..||Feb 2006||1,399|
|9.||Canon 400D||..||+ +||+ +||o||4/5||Aug 2006||799|
|10.||Canon 20D||..||..||+ +||..||..||Aug 2004||1,499|
|11.||Nikon D7500||4.5/5||+ +||86/100||5/5||4.5/5||Apr 2017||1,299|
|12.||Nikon D500||5/5||+ +||91/100||4.5/5||5/5||Jan 2016||1,999|
|13.||Nikon D7200||4/5||+ +||84/100||4.5/5||4.5/5||Mar 2015||1,199|
|14.||Nikon D7000||4/5||..||80/100||4.5/5||4.5/5||Sep 2010||1,499|
|15.||Nikon D90||..||+ +||+ +||4/5||4.5/5||Aug 2008||1,299|
|16.||Olympus E-30||..||..||71/100||4.5/5||4/5||Nov 2008||1,299|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The review scores listed above should be treated with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Thus, a score needs to be put into the context of the launch date and the launch price 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
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Specifications: Canon 40D 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 40D||Nikon D7100|
|Camera Type||Digital single lens reflex||Digital single lens reflex|
|Camera Lens||Canon EF mount lenses||Nikon F mount lenses|
|Launch Date||August 2007||February 2013|
|Launch Price||USD 1,299||USD 1,199|
|Sensor Specs||Canon 40D||Nikon D7100|
|Sensor Format||APS-C Sensor||APS-C Sensor|
|Sensor Size||22.3 x 14.9 mm||23.5 x 15.6 mm|
|Sensor Area||332.27 mm2||366.6 mm2|
|Sensor Diagonal||26.8 mm||28.2 mm|
|Sensor Resolution||10.1 Megapixels||24 Megapixels|
|Image Resolution||3888 x 2592 pixels||6000 x 4000 pixels|
|Pixel Pitch||5.73 μm||3.91 μm|
|Pixel Density||3.03 MP/cm2||6.55 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||no Video||1080/60p Video|
|ISO Setting||100 - 1,600 ISO||100 - 6,400 ISO|
|ISO Boost||100 - 3,200 ISO||50 - 25,600 ISO|
|Image Processor||DIGIC 3||EXPEED 4|
|DXO Sensor Quality (score)||64||83|
|DXO Color Depth (bits)||22.1||24.2|
|DXO Dynamic Range (EV)||11.3||13.7|
|DXO Low Light (ISO)||703||1256|
|Screen Specs||Canon 40D||Nikon D7100|
|Viewfinder Type||Optical viewfinder||Optical viewfinder|
|Viewfinder Field of View||95%||100%|
|Top-Level Screen||Control Panel||Control Panel|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.2inch|
|LCD Resolution||230k dots||1229k dots|
|LCD Attachment||Fixed screen||Fixed screen|
|Shooting Specs||Canon 40D||Nikon D7100|
|Focus System||Phase-detect AF||Phase-detect AF|
|Continuous Shooting||6.5 shutter flaps/s||6 shutter flaps/s|
|Shutter Life Expectancy||100 000 actuations||150 000 actuations|
|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||Dual card slots|
|Connectivity Specs||Canon 40D||Nikon D7100|
|Studio Flash||PC Sync socket||no PC Sync|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||no HDMI||mini HDMI|
|Microphone Port||no MIC socket||External MIC port|
|Headphone Socket||no Headphone port||Headphone port|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Canon 40D||Nikon D7100|
|Environmental Sealing||not weather sealed||Weathersealed body|
|Battery Life (CIPA)||750 shots per charge||950 shots per charge|
146 x 108 x 74 mm
(5.7 x 4.3 x 2.9 in)
136 x 107 x 76 mm
(5.4 x 4.2 x 3.0 in)
|Camera Weight||822 g (29.0 oz)||765 g (27.0 oz)|
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