Canon 40D vs Nikon D3100
The Canon EOS 40D and the Nikon D3100 are two digital cameras that were announced, respectively, in August 2007 and August 2010. 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 14.2 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 D3100? 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.
Body comparison
The physical size and weight of the Canon 40D and the Nikon D3100 are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth measures are rounded to the nearest millimeter.
The D3100 can be obtained in two different colors (black, red), while the 40D 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 D3100 is notably smaller (25 percent) than the Canon 40D. Moreover, the D3100 is substantially lighter (39 percent) than the 40D. In this context, it is worth noting that neither the 40D nor the D3100 are weather-sealed.
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 (D3100).
Concerning battery life, the 40D gets 750 shots out of its Canon BP-511A battery, while the D3100 can take 550 images on a single charge of its Nikon EN-EL14 power pack.
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, you can use the CAM-parator app to select your camera combination among a large number of options.
Camera Model |
Camera Width |
Camera Height |
Camera Depth |
Camera Weight |
Battery Life |
Weather Sealing |
Camera Launch |
Launch Price (USD) |
Street Price |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Canon 40D | 146 mm | 108 mm | 74 mm | 822 g | 750 | n | Aug 2007 | 1,299 | ebay.com | |
2. | Nikon D3100 | 124 mm | 96 mm | 75 mm | 505 g | 550 | n | Aug 2010 | 599 | ebay.com | |
3. | Canon 20D | 144 mm | 106 mm | 72 mm | 770 g | 700 | n | Aug 2004 | 1,499 | ebay.com | |
4. | Canon 30D | 144 mm | 106 mm | 74 mm | 785 g | 750 | n | Feb 2006 | 1,399 | ebay.com | |
5. | Canon 50D | 146 mm | 108 mm | 74 mm | 822 g | 800 | Y | Aug 2008 | 1,299 | ebay.com | |
6. | Canon 60D | 145 mm | 106 mm | 79 mm | 755 g | 1100 | Y | Aug 2010 | 1,399 | ebay.com | |
7. | Canon 70D | 139 mm | 104 mm | 79 mm | 755 g | 920 | Y | Jul 2013 | 1,199 | ebay.com | |
8. | Canon 400D | 127 mm | 84 mm | 65 mm | 556 g | 370 | n | Aug 2006 | 799 | ebay.com | |
9. | Canon 450D | 129 mm | 98 mm | 62 mm | 524 g | 500 | n | Jan 2008 | 799 | ebay.com | |
10. | Canon 1000D | 126 mm | 98 mm | 65 mm | 502 g | 500 | n | Jun 2008 | 449 | ebay.com | |
11. | Nikon D40 | 124 mm | 94 mm | 64 mm | 522 g | 470 | n | Nov 2006 | 499 | ebay.com | |
12. | Nikon D90 | 132 mm | 103 mm | 77 mm | 703 g | 850 | n | Aug 2008 | 1,299 | ebay.com | |
13. | Nikon D3000 | 126 mm | 97 mm | 64 mm | 536 g | 500 | n | Jul 2009 | 599 | ebay.com | |
14. | Nikon D3200 | 125 mm | 96 mm | 77 mm | 505 g | 540 | n | Apr 2012 | 599 | ebay.com | |
15. | Nikon D5000 | 127 mm | 104 mm | 80 mm | 590 g | 510 | n | Apr 2009 | 749 | ebay.com | |
16. | Nikon D5100 | 128 mm | 97 mm | 79 mm | 560 g | 660 | n | Apr 2011 | 749 | ebay.com | |
17. | Olympus E-30 | 142 mm | 108 mm | 75 mm | 701 g | 750 | n | Nov 2008 | 1,299 | ebay.com | |
Note: 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 D3100 was launched at a markedly lower price (by 54 percent) than the 40D, which puts it into a different market segment. 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.
Sensor comparison
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 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 D3100 is 7 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 14.2MP, the D3100 offers a higher resolution than the 40D (10.1MP), but the D3100 has smaller individual pixels (pixel pitch of 5.01μm versus 5.73μm for the 40D). Yet, the D3100 is a much more recent model (by 3 years) 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.
The resolution advantage of the Nikon D3100 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the D3100 for good quality output (200 dots per inch) amounts to 23 x 15.4 inches or 58.5 x 39 cm, for very good quality (250 dpi) 18.4 x 12.3 inches or 46.8 x 31.2 cm, and for excellent quality (300 dpi) 15.4 x 10.2 inches or 39 x 26 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 D3100 are ISO 100 to ISO 3200, with the possibility to increase the ISO range to 100-12800.
Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.
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"). The Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar imaging performance. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
Camera Model |
Sensor Class |
Resolution (MP) |
Horiz. Pixels |
Vert. Pixels |
Video Format |
DXO Portrait |
DXO Landscape |
DXO Sports |
DXO Overall |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Canon 40D | APS-C | 10.1 | 3888 | 2592 | none | 22.1 | 11.3 | 703 | 64 | |
2. | Nikon D3100 | APS-C | 14.2 | 4608 | 3072 | 1080/24p | 22.5 | 11.3 | 919 | 67 | |
3. | Canon 20D | APS-C | 8.2 | 3504 | 2336 | none | 21.9 | 11.0 | 721 | 62 | |
4. | Canon 30D | APS-C | 8.2 | 3504 | 2336 | none | 21.5 | 10.8 | 736 | 59 | |
5. | Canon 50D | APS-C | 15.1 | 4752 | 3168 | none | 21.8 | 11.4 | 696 | 63 | |
6. | Canon 60D | APS-C | 17.9 | 5184 | 3456 | 1080/30p | 22.2 | 11.5 | 813 | 66 | |
7. | Canon 70D | APS-C | 20.0 | 5472 | 3648 | 1080/30p | 22.5 | 11.6 | 926 | 68 | |
8. | Canon 400D | APS-C | 10.1 | 3888 | 2592 | none | 22.1 | 11.0 | 664 | 62 | |
9. | Canon 450D | APS-C | 12.2 | 4272 | 2848 | none | 21.9 | 10.8 | 692 | 61 | |
10. | Canon 1000D | APS-C | 10.1 | 3888 | 2592 | none | 22.0 | 10.9 | 719 | 62 | |
11. | Nikon D40 | APS-C | 6.0 | 3008 | 2000 | none | 21.0 | 11.0 | 561 | 56 | |
12. | Nikon D90 | APS-C | 12.2 | 4288 | 2848 | 720/24p | 22.7 | 12.5 | 977 | 73 | |
13. | Nikon D3000 | APS-C | 10.0 | 3872 | 2592 | none | 22.3 | 11.1 | 563 | 62 | |
14. | Nikon D3200 | APS-C | 24.1 | 6016 | 4000 | 1080/30p | 24.1 | 13.2 | 1131 | 81 | |
15. | Nikon D5000 | APS-C | 12.2 | 4288 | 2848 | 720/24p | 22.7 | 12.5 | 868 | 72 | |
16. | Nikon D5100 | APS-C | 16.1 | 4928 | 3264 | 1080/30p | 23.5 | 13.6 | 1183 | 80 | |
17. | 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 also of capturing video footage. The D3100 indeed provides for movie recording, while the 40D does not. The highest resolution format that the D3100 can use is 1080/24p.
Feature comparison
Beyond body and sensor, cameras can and do differ across a range of features. The 40D and the D3100 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 viewfinders of both cameras offer the same field of view (95%), but the viewfinder of the 40D has a higher magnification than the one of the D3100 (0.59x vs 0.53x), 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 D3100, and comparable cameras.
Camera Model |
Viewfinder (Type or 000 dots) |
Control Panel (yes/no) |
LCD Specifications (inch/000 dots) |
LCD Attach- ment |
Touch Screen (yes/no) |
Max Shutter Speed * |
Max Shutter Flaps * |
Built-in Flash (yes/no) |
Built-in Image Stab |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Canon 40D | optical | Y | 3.0 / 230 | fixed | n | 1/8000s | 6.5/s | Y | n | |
2. | Nikon D3100 | optical | n | 3.0 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
3. | Canon 20D | optical | Y | 1.8 / 118 | fixed | n | 1/8000s | 5.0/s | Y | n | |
4. | Canon 30D | optical | Y | 2.5 / 230 | fixed | n | 1/8000s | 5.0/s | Y | n | |
5. | Canon 50D | optical | Y | 3.0 / 920 | fixed | n | 1/8000s | 6.3/s | Y | n | |
6. | Canon 60D | optical | Y | 3.0 / 1040 | swivel | n | 1/8000s | 5.3/s | Y | n | |
7. | Canon 70D | optical | Y | 3.0 / 1040 | swivel | Y | 1/8000s | 7.0/s | Y | n | |
8. | Canon 400D | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
9. | Canon 450D | optical | n | 3.0 / 230 | fixed | n | 1/4000s | 3.5/s | Y | n | |
10. | Canon 1000D | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
11. | Nikon D40 | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 2.5/s | Y | n | |
12. | Nikon D90 | optical | Y | 3.0 / 920 | fixed | n | 1/4000s | 4.5/s | Y | n | |
13. | Nikon D3000 | optical | n | 3.0 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
14. | Nikon D3200 | optical | n | 3.0 / 921 | fixed | n | 1/4000s | 4.0/s | Y | n | |
15. | Nikon D5000 | optical | n | 2.7 / 230 | full-flex | n | 1/4000s | 4.0/s | Y | n | |
16. | Nikon D5100 | optical | n | 3.0 / 921 | swivel | n | 1/4000s | 4.0/s | Y | n | |
17. | Olympus E-30 | optical | Y | 2.7 / 230 | swivel | n | 1/8000s | 5.0/s | Y | Y | |
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. |
One feature that is present on the 40D, but is missing on the D3100 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 40D writes its imaging data to Compact Flash cards, while the D3100 uses SDXC cards.
Connectivity comparison
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 D3100 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Camera Model |
Hotshoe Port |
Internal Mic / Speaker |
Microphone Port |
Headphone Port |
HDMI Port |
USB Port |
WiFi Support |
NFC Support |
Bluetooth Support |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Canon 40D | Y | - / - | - | - | - | 2.0 | - | - | - | |
2. | Nikon D3100 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
3. | Canon 20D | Y | - / - | - | - | - | 1.1 | - | - | - | |
4. | Canon 30D | Y | - / - | - | - | - | 2.0 | - | - | - | |
5. | Canon 50D | Y | - / - | - | - | mini | 2.0 | - | - | - | |
6. | Canon 60D | Y | mono / mono | Y | - | mini | 2.0 | - | - | - | |
7. | Canon 70D | Y | stereo / mono | Y | - | mini | 2.0 | Y | - | - | |
8. | Canon 400D | Y | - / - | - | - | - | 2.0 | - | - | - | |
9. | Canon 450D | Y | - / - | - | - | mini | 2.0 | - | - | - | |
10. | Canon 1000D | Y | - / - | - | - | - | 2.0 | - | - | - | |
11. | Nikon D40 | Y | - / - | - | - | - | 2.0 | - | - | - | |
12. | Nikon D90 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
13. | Nikon D3000 | Y | - / - | - | - | - | 2.0 | - | - | - | |
14. | Nikon D3200 | Y | mono / mono | Y | - | mini | 2.0 | - | - | - | |
15. | Nikon D5000 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
16. | Nikon D5100 | Y | mono / mono | Y | - | mini | 2.0 | - | - | - | |
17. | Olympus E-30 | Y | - / - | - | - | - | 2.0 | - | - | - |
Studio photographers will appreciate that the Canon 40D (unlike the D3100) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the 40D and the D3100 have been discontinued, but can regularly be found used on ebay. The 40D was replaced by the Canon 50D, while the D3100 was followed by the Nikon D3200. Further information on the features and operation of the 40D and D3100 can be found, respectively, in the Canon 40D Manual (free pdf) or the online Nikon D3100 Manual.
Review summary
So what conclusions can be drawn? Is there a clear favorite between the Canon 40D and the Nikon D3100? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.
Reasons to prefer the Canon EOS 40D:
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.59x vs 0.53x).
- Easier setting verification: Features an LCD display on top to control shooting parameters.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Faster burst: Shoots at higher frequency (6.5 vs 3 flaps/sec) to capture the decisive moment.
- Longer lasting: Can take more shots (750 versus 550) 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 August 2007).
Arguments in favor of the Nikon D3100:
- More detail: Has more megapixels (14.2 vs 10.1MP), which boosts linear resolution by 19%.
- Better low-light sensitivity: Can shoot in dim conditions (0.4 stops ISO advantage).
- Broader imaging potential: Can capture not only stills but also 1080/24p video.
- More compact: Is smaller (124x96mm vs 146x108mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 317g or 39 percent) and is thus easier to take along.
- More affordable: Was introduced into a lower priced category (54 percent cheaper at launch).
- More modern: Reflects 3 years of technical progress since the 40D launch.
If the count of relative strengths (bullet points above) is taken as a measure, the match-up finishes in a tie (7 points each). 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 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 40D and the Nikon D3100 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 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 D3100 perform in practice. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.
Expert reviews
This is why hands-on reviews by experts are important. The adjacent summary-table relays the overall verdicts of several of the most popular camera 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.
Camera Model |
AP score |
CL score |
DCW score |
DPR score |
EPZ score |
PB score |
Camera Launch |
Launch Price (USD) |
Street Price |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Canon 40D | .. | + + | .. | + + | 4.5/5 | 4.5/5 | Aug 2007 | 1,299 | ebay.com | |
2. | Nikon D3100 | 5/5 | + + | .. | 72/100 | 4.5/5 | 4.5/5 | Aug 2010 | 599 | ebay.com | |
3. | Canon 20D | .. | .. | .. | + + | .. | .. | Aug 2004 | 1,499 | ebay.com | |
4. | Canon 30D | .. | + + | .. | + + | o | .. | Feb 2006 | 1,399 | ebay.com | |
5. | Canon 50D | .. | + + | .. | + + | 4.5/5 | 4.5/5 | Aug 2008 | 1,299 | ebay.com | |
6. | Canon 60D | 5/5 | + | .. | 79/100 | 4/5 | 4.5/5 | Aug 2010 | 1,399 | ebay.com | |
7. | Canon 70D | 5/5 | + + | .. | 83/100 | 4.5/5 | 5/5 | Jul 2013 | 1,199 | ebay.com | |
8. | Canon 400D | .. | + + | .. | + + | o | 4/5 | Aug 2006 | 799 | ebay.com | |
9. | Canon 450D | .. | + + | .. | + + | 4/5 | 4.5/5 | Jan 2008 | 799 | ebay.com | |
10. | Canon 1000D | .. | 82/100 | .. | + + | 3.5/5 | 4.5/5 | Jun 2008 | 449 | ebay.com | |
11. | Nikon D40 | .. | 81/100 | .. | + + | o | 4.5/5 | Nov 2006 | 499 | ebay.com | |
12. | Nikon D90 | .. | + + | .. | + + | 4/5 | 4.5/5 | Aug 2008 | 1,299 | ebay.com | |
13. | Nikon D3000 | .. | + | .. | 72/100 | 4/5 | 4.5/5 | Jul 2009 | 599 | ebay.com | |
14. | Nikon D3200 | 5/5 | + + | .. | 73/100 | 4.5/5 | 4.5/5 | Apr 2012 | 599 | ebay.com | |
15. | Nikon D5000 | .. | + + | .. | 75/100 | 4/5 | 4.5/5 | Apr 2009 | 749 | ebay.com | |
16. | Nikon D5100 | 5/5 | + + | .. | 76/100 | 4.5/5 | 4.5/5 | Apr 2011 | 749 | ebay.com | |
17. | Olympus E-30 | .. | .. | .. | 71/100 | 4.5/5 | 4/5 | Nov 2008 | 1,299 | ebay.com | |
Note: (+ +) 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 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? In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.
Specifications: Canon 40D vs Nikon D3100
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 D3100 |
---|---|---|
Camera Type | Digital single lens reflex | Digital single lens reflex |
Camera Lens | Canon EF mount lenses | Nikon F mount lenses |
Launch Date | August 2007 | August 2010 |
Launch Price | USD 1,299 | USD 599 |
Sensor Specs | Canon 40D | Nikon D3100 |
Sensor Technology | CMOS | CMOS |
Sensor Format | APS-C Sensor | APS-C Sensor |
Sensor Size | 22.3 x 14.9 mm | 23.1 x 15.4 mm |
Sensor Area | 332.27 mm2 | 355.74 mm2 |
Sensor Diagonal | 26.8 mm | 27.8 mm |
Crop Factor | 1.6x | 1.5x |
Sensor Resolution | 10.1 Megapixels | 14.2 Megapixels |
Image Resolution | 3888 x 2592 pixels | 4608 x 3072 pixels |
Pixel Pitch | 5.73 μm | 5.01 μm |
Pixel Density | 3.03 MP/cm2 | 3.98 MP/cm2 |
Moiré control | Anti-Alias filter | Anti-Alias filter |
Movie Capability | no Video | 1080/24p Video |
ISO Setting | 100 - 1,600 ISO | 100 - 3,200 ISO |
ISO Boost | 100 - 3,200 ISO | 100 - 12,800 ISO |
Image Processor | DIGIC 3 | EXPEED 2 |
DXO Sensor Quality (score) | 64 | 67 |
DXO Color Depth (bits) | 22.1 | 22.5 |
DXO Dynamic Range (EV) | 11.3 | 11.3 |
DXO Low Light (ISO) | 703 | 919 |
Screen Specs | Canon 40D | Nikon D3100 |
Viewfinder Type | Optical viewfinder | Optical viewfinder |
Viewfinder Field of View | 95% | 95% |
Viewfinder Magnification | 0.59x | 0.53x |
Top-Level Screen | Control Panel | no Top Display |
LCD Framing | Live View | Live View |
Rear LCD Size | 3.0inch | 3.0inch |
LCD Resolution | 230k dots | 230k dots |
LCD Attachment | Fixed screen | Fixed screen |
Shooting Specs | Canon 40D | Nikon D3100 |
Focus System | Phase-detect AF | Phase-detect AF |
Continuous Shooting | 6.5 shutter flaps/s | 3 shutter flaps/s |
Shutter Life Expectancy | 100 000 actuations | 100 000 actuations |
Fill Flash | Built-in Flash | Built-in Flash |
Storage Medium | CF cards | SDXC cards |
Single or Dual Card Slots | Single card slot | Single card slot |
Connectivity Specs | Canon 40D | Nikon D3100 |
External Flash | Hotshoe | Hotshoe |
Studio Flash | PC Sync socket | no PC Sync |
USB Connector | USB 2.0 | USB 2.0 |
HDMI Port | no HDMI | mini HDMI |
Wifi Support | no Wifi | no Wifi |
Body Specs | Canon 40D | Nikon D3100 |
Battery Type | Canon BP-511A | Nikon EN-EL14 |
Battery Life (CIPA) | 750 shots per charge | 550 shots per charge |
Body Dimensions |
146 x 108 x 74 mm (5.7 x 4.3 x 2.9 in) |
124 x 96 x 75 mm (4.9 x 3.8 x 3.0 in) |
Camera Weight | 822 g (29.0 oz) | 505 g (17.8 oz) |
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