Nikon D40X vs Olympus E-M1
The Nikon D40X and the Olympus OM-D E-M1 are two digital cameras that were announced, respectively, in March 2007 and September 2013. The D40X is a DSLR, while the E-M1 is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (D40X) and a Four Thirds (E-M1) sensor. The Nikon has a resolution of 10 megapixels, whereas the Olympus provides 15.9 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.

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Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D40X and the Olympus OM-D E-M1? 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 side-by-side display below illustrates the physical size and weight of the Nikon D40X and the Olympus E-M1. 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.
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 Olympus E-M1 is somewhat larger (5 percent) than the Nikon D40X. However, the E-M1 is markedly lighter (5 percent) than the D40X. It is noteworthy in this context that the E-M1 is splash and dust-proof, while the D40X 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. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can compare the optics available for the two cameras in the Nikon Lens Catalog (D40X) and the Micro Four Thirds Lens Catalog (E-M1). Mirrorless cameras, such as the E-M1, have moreover the advantage that they can use many lenses from other systems via adapters, as they have a relatively short flange to focal plane distance.
Concerning battery life, the D40X gets 520 shots out of its Nikon EN-EL9 battery, while the E-M1 can take 350 images on a single charge of its Olympus BLN-1 power pack.
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.

| Camera Model |
Camera Width |
Camera Height |
Camera Depth |
Camera Weight |
Battery Life |
Weather Sealing |
Camera Launch |
Launch Price |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Nikon D40X | 124 mm | 94 mm | 64 mm | 522 g | 520 | n | Mar 2007 | US$ 729 | ebay.com | |
| 2. | Olympus E-M1 | 130 mm | 94 mm | 63 mm | 497 g | 350 | Y | Sep 2013 | US$ 1 399 | ebay.com | |
| 3. | Nikon D40 | 124 mm | 94 mm | 64 mm | 522 g | 470 | n | Nov 2006 | US$ 499 | ebay.com | |
| 4. | Nikon D50 | 133 mm | 102 mm | 76 mm | 620 g | 400 | n | Apr 2005 | US$ 749 | ebay.com | |
| 5. | Nikon D60 | 126 mm | 94 mm | 64 mm | 522 g | 500 | n | Jan 2008 | US$ 629 | ebay.com | |
| 6. | Nikon D80 | 132 mm | 103 mm | 77 mm | 668 g | 600 | n | Aug 2006 | US$ 999 | ebay.com | |
| 7. | Nikon D90 | 132 mm | 103 mm | 77 mm | 703 g | 850 | n | Aug 2008 | US$ 1 299 | ebay.com | |
| 8. | Nikon D3000 | 126 mm | 97 mm | 64 mm | 536 g | 500 | n | Jul 2009 | US$ 599 | ebay.com | |
| 9. | Nikon D3100 | 124 mm | 96 mm | 75 mm | 505 g | 550 | n | Aug 2010 | US$ 599 | ebay.com | |
| 10. | Nikon D5000 | 127 mm | 104 mm | 80 mm | 590 g | 510 | n | Apr 2009 | US$ 749 | ebay.com | |
| 11. | Olympus E-420 | 130 mm | 91 mm | 53 mm | 440 g | 500 | n | Mar 2008 | US$ 599 | ebay.com | |
| 12. | Olympus E-M1 II | 134 mm | 91 mm | 67 mm | 574 g | 440 | Y | Sep 2016 | US$ 1 999 | ebay.com | |
| 13. | Olympus E-M5 | 122 mm | 89 mm | 43 mm | 425 g | 360 | Y | Feb 2012 | US$ 1 299 | ebay.com | |
| 14. | Olympus E-M5 II | 124 mm | 85 mm | 45 mm | 469 g | 310 | Y | Feb 2015 | US$ 1 099 | ebay.com | |
| 15. | Olympus E-P5 | 122 mm | 69 mm | 37 mm | 420 g | 330 | n | May 2013 | US$ 999 | ebay.com | |
| 16. | Olympus PEN-F | 125 mm | 72 mm | 37 mm | 427 g | 330 | n | Jan 2016 | US$ 1 199 | ebay.com | |
| 17. | Panasonic L10 | 135 mm | 96 mm | 78 mm | 556 g | 450 | n | Aug 2007 | US$ 599 | ebay.com | |
| Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders. | |||||||||||
Any camera decision will obviously take relative prices into account. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The D40X was launched at a markedly lower price (by 48 percent) than the E-M1, which puts it into a different market segment. 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.
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 more expensive and lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Nikon D40X features an APS-C sensor and the Olympus E-M1 a Four Thirds sensor. The sensor area in the E-M1 is 40 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 2.0. The sensor in the D40X has a native 3:2 aspect ratio, while the one in the E-M1 offers a 4:3 aspect.

Despite having a smaller sensor, the E-M1 offers a higher resolution of 15.9 megapixels, compared with 10 MP of the 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 3.76μm versus 6.11μm for the D40X). However, it should be noted that the E-M1 is much more recent (by 6 years and 6 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. Coming back to sensor resolution, it should be mentioned that the E-M1 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Olympus E-M1 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the E-M1 for good quality output (200 dots per inch) amounts to 23 x 17.3 inches or 58.5 x 43.9 cm, for very good quality (250 dpi) 18.4 x 13.8 inches or 46.8 x 35.1 cm, and for excellent quality (300 dpi) 15.4 x 11.5 inches or 39 x 29.3 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 E-M1 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
The Nikon D40X 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 Olympus OM-D E-M1 are ISO 200 to ISO 25600, with the possibility to increase the ISO range to 100-25600.
In terms of underlying technology, the D40X is build around a CCD sensor, while the E-M1 uses a CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

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"). Of the two cameras under consideration, the E-M1 has a markedly higher DXO score than the D40X (overall score 10 points higher), which will translate into better image quality. The advantage is based on 0.6 bits higher color depth, 1.3 EV in additional dynamic range, and 0.6 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.

| Camera Model |
Sensor Class |
Resolution (MP) |
Horiz. Pixels |
Vert. Pixels |
Video Format |
DXO Portrait |
DXO Landscape |
DXO Sports |
DXO Overall |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Nikon D40X | APS-C | 10.0 | 3872 | 2592 | none | 22.4 | 11.4 | 516 | 63 | |
| 2. | Olympus E-M1 | Four Thirds | 15.9 | 4608 | 3456 | 1080/30p | 23.0 | 12.7 | 757 | 73 | |
| 3. | Nikon D40 | APS-C | 6.0 | 3008 | 2000 | none | 21.0 | 11.0 | 561 | 56 | |
| 4. | Nikon D50 | APS-C | 6.0 | 3008 | 2000 | none | 20.9 | 10.8 | 560 | 55 | |
| 5. | Nikon D60 | APS-C | 10.0 | 3872 | 2592 | none | 22.5 | 11.4 | 562 | 65 | |
| 6. | Nikon D80 | APS-C | 10.0 | 3872 | 2592 | none | 22.1 | 11.2 | 524 | 61 | |
| 7. | Nikon D90 | APS-C | 12.2 | 4288 | 2848 | 720/24p | 22.7 | 12.5 | 977 | 73 | |
| 8. | Nikon D3000 | APS-C | 10.0 | 3872 | 2592 | none | 22.3 | 11.1 | 563 | 62 | |
| 9. | Nikon D3100 | APS-C | 14.2 | 4608 | 3072 | 1080/24p | 22.5 | 11.3 | 919 | 67 | |
| 10. | Nikon D5000 | APS-C | 12.2 | 4288 | 2848 | 720/24p | 22.7 | 12.5 | 868 | 72 | |
| 11. | Olympus E-420 | Four Thirds | 10.0 | 3648 | 2736 | none | 21.5 | 10.4 | 527 | 56 | |
| 12. | Olympus E-M1 II | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.7 | 12.8 | 1312 | 80 | |
| 13. | Olympus E-M5 | Four Thirds | 15.9 | 4608 | 3456 | 1080/60i | 22.8 | 12.3 | 826 | 71 | |
| 14. | Olympus E-M5 II | Four Thirds | 15.9 | 4608 | 3456 | 1080/60p | 23.0 | 12.5 | 842 | 73 | |
| 15. | Olympus E-P5 | Four Thirds | 15.9 | 4608 | 3456 | 1080/30p | 22.8 | 12.4 | 895 | 72 | |
| 16. | Olympus PEN-F | Four Thirds | 20.2 | 5184 | 3888 | 1080/60p | 23.1 | 12.4 | 894 | 74 | |
| 17. | Panasonic L10 | Four Thirds | 10.0 | 3648 | 2736 | none | 21.3 | 10.8 | 429 | 55 |
Many modern cameras are not only capable of taking still images, but can also record movies. The E-M1 indeed provides for movie recording, while the D40X does not. The highest resolution format that the E-M1 can use is 1080/30p.
Feature comparison
Apart from body and sensor, cameras can and do differ across a variety of features. For example, the E-M1 has an electronic viewfinder (2360k dots), while the D40X has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The viewfinder in the E-M1 offers a wider field of view (100%) than the one in the D40X (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the E-M1 has a higher magnification (0.74x vs 0.53x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Nikon D40X and Olympus E-M1 along with similar information for a selection of comparators.

| 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. | Nikon D40X | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
| 2. | Olympus E-M1 | 2360 | n | 3.0 / 1037 | tilting | Y | 1/8000s | 10.0/s | n | Y | |
| 3. | Nikon D40 | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 2.5/s | Y | n | |
| 4. | Nikon D50 | optical | n | 2.0 / 130 | fixed | n | 1/4000s | 2.5/s | Y | n | |
| 5. | Nikon D60 | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
| 6. | Nikon D80 | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
| 7. | Nikon D90 | optical | Y | 3.0 / 920 | fixed | n | 1/4000s | 4.5/s | Y | n | |
| 8. | Nikon D3000 | optical | n | 3.0 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
| 9. | Nikon D3100 | optical | n | 3.0 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
| 10. | Nikon D5000 | optical | n | 2.7 / 230 | full-flex | n | 1/4000s | 4.0/s | Y | n | |
| 11. | Olympus E-420 | optical | n | 2.7 / 215 | fixed | n | 1/4000s | 3.5/s | Y | n | |
| 12. | Olympus E-M1 II | 2360 | n | 3.0 / 1037 | swivel | Y | 1/8000s | 18.0/s | n | Y | |
| 13. | Olympus E-M5 | 1440 | n | 3.0 / 610 | tilting | Y | 1/4000s | 9.0/s | n | Y | |
| 14. | Olympus E-M5 II | 2360 | n | 3.0 / 1037 | swivel | Y | 1/8000s | 10.0/s | n | Y | |
| 15. | Olympus E-P5 | optional | n | 3.0 / 1037 | tilting | Y | 1/8000s | 9.0/s | Y | Y | |
| 16. | Olympus PEN-F | 2360 | n | 3.0 / 1037 | swivel | Y | 1/8000s | 10.0/s | n | Y | |
| 17. | Panasonic L10 | optical | n | 2.5 / 207 | swivel | n | 1/4000s | 3.0/s | Y | n | |
| Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. | |||||||||||
One difference between the cameras concerns the presence of an on-board flash. The D40X has one, while the E-M1 does not. While the built-in flash of the D40X is not very powerful, it can at times be useful as a fill-in light.
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 E-M1 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 Olympus E-M1 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 D40X writes its imaging data to SDHC cards, while the E-M1 uses SDXC cards. The E-M1 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.
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 Nikon D40X and Olympus OM-D E-M1 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. | Nikon D40X | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 2. | Olympus E-M1 | Y | stereo / mono | Y | - | micro | 2.0 | Y | - | - | |
| 3. | Nikon D40 | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 4. | Nikon D50 | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 5. | Nikon D60 | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 6. | Nikon D80 | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 7. | Nikon D90 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
| 8. | Nikon D3000 | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 9. | Nikon D3100 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
| 10. | Nikon D5000 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
| 11. | Olympus E-420 | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 12. | Olympus E-M1 II | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | - | |
| 13. | Olympus E-M5 | Y | stereo / mono | - | - | mini | 2.0 | - | - | - | |
| 14. | Olympus E-M5 II | Y | stereo / mono | Y | - | micro | 2.0 | Y | - | - | |
| 15. | Olympus E-P5 | Y | stereo / mono | - | - | micro | 2.0 | Y | - | - | |
| 16. | Olympus PEN-F | Y | stereo / mono | - | - | micro | 2.0 | Y | - | - | |
| 17. | Panasonic L10 | Y | - / - | - | - | - | 2.0 | - | - | - |
It is notable that the E-M1 offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the D40X does not provide wifi capability.
Studio photographers will appreciate that the Olympus E-M1 (unlike the D40X) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the D40X and the E-M1 have been discontinued, but can regularly be found used on ebay. The D40X was replaced by the Nikon D60 , while the E-M1 was followed by the Olympus E-M1 II. Further information on the features and operation of the D40X and E-M1 can be found, respectively, in the Nikon D40X Manual (free pdf) or the online Olympus E-M1 Manual.
Review summary
So how do things add up? Which of the two cameras – the Nikon D40X or the Olympus E-M1 – has the upper hand? Is one clearly better than the other? A synthesis of the relative strong points of each of the models is listed below.

Arguments in favor of the Nikon D40X:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Longer lasting: Can take more shots (520 versus 350) on a single battery charge.
- Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
- More affordable: Was introduced into a lower priced category (48 percent cheaper at launch).
- More heavily discounted: Has been available for much longer (launched in March 2007).

Advantages of the Olympus OM-D E-M1:
- More detail: Has more megapixels (15.9 vs 10MP), which boosts linear resolution by 24%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better image quality: Scores markedly higher (10 points) in the DXO overall evaluation.
- More dynamic range: Captures a broader range of light and dark details (1.3 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (0.6 stops ISO advantage).
- Broader imaging potential: Can capture not only stills but also 1080/30p video.
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- More framing info: Has an electronic viewfinder that displays shooting data.
- 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 (0.74x vs 0.53x).
- 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 (1037k 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.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Faster burst: Shoots at higher frequency (10 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.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
- More legacy lens friendly: Can use many non-native lenses via adapters.
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
- More modern: Reflects 6 years and 6 months of technical progress since the D40X launch.
If the count of individual advantages (bullet points above) is taken as a guide, the E-M1 is the clear winner of the contest (25 : 6 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 Nikon D40X and the Olympus E-M1 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens 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 D40X or the E-M1. 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.
Expert reviews
This is where reviews by experts come in. 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 |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Nikon D40X | .. | 79/100 | .. | + + | 4/5 | 4/5 | Mar 2007 | US$ 729 | ebay.com | |
| 2. | Olympus E-M1 | 5/5 | + + | .. | 84/100 | 4.5/5 | 4.5/5 | Sep 2013 | US$ 1 399 | ebay.com | |
| 3. | Nikon D40 | .. | 81/100 | .. | + + | o | 4.5/5 | Nov 2006 | US$ 499 | ebay.com | |
| 4. | Nikon D50 | .. | 78/100 | .. | + + | 4/5 | 4.5/5 | Apr 2005 | US$ 749 | ebay.com | |
| 5. | Nikon D60 | .. | 80/100 | .. | + + | 4/5 | 4.5/5 | Jan 2008 | US$ 629 | ebay.com | |
| 6. | Nikon D80 | .. | + | .. | + + | o | 4.5/5 | Aug 2006 | US$ 999 | ebay.com | |
| 7. | Nikon D90 | .. | + + | .. | + + | 4/5 | 4.5/5 | Aug 2008 | US$ 1 299 | ebay.com | |
| 8. | Nikon D3000 | .. | + | .. | 72/100 | 4/5 | 4.5/5 | Jul 2009 | US$ 599 | ebay.com | |
| 9. | Nikon D3100 | 5/5 | + + | .. | 72/100 | 4.5/5 | 4.5/5 | Aug 2010 | US$ 599 | ebay.com | |
| 10. | Nikon D5000 | .. | + + | .. | 75/100 | 4/5 | 4.5/5 | Apr 2009 | US$ 749 | ebay.com | |
| 11. | Olympus E-420 | .. | 85/100 | .. | + + | 4/5 | 4.5/5 | Mar 2008 | US$ 599 | ebay.com | |
| 12. | Olympus E-M1 II | 5/5 | + + | 5/5 | 85/100 | 4.5/5 | 4.5/5 | Sep 2016 | US$ 1 999 | ebay.com | |
| 13. | Olympus E-M5 | 4/5 | + + | .. | 80/100 | 4.5/5 | 5/5 | Feb 2012 | US$ 1 299 | ebay.com | |
| 14. | Olympus E-M5 II | 5/5 | + + | 4.5/5 | 81/100 | 5/5 | 5/5 | Feb 2015 | US$ 1 099 | ebay.com | |
| 15. | Olympus E-P5 | 5/5 | + + | .. | 78/100 | 4.5/5 | 5/5 | May 2013 | US$ 999 | ebay.com | |
| 16. | Olympus PEN-F | .. | .. | 4/5 | 82/100 | 4.5/5 | 5/5 | Jan 2016 | US$ 1 199 | ebay.com | |
| 17. | Panasonic L10 | .. | 85/100 | .. | + | 3.5/5 | 4/5 | Aug 2007 | US$ 599 | 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. 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.

Check D40X offers at
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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.
- Canon 5DS R vs Nikon D40X
- Canon XS vs Olympus E-M1
- Fujifilm X-S10 vs Nikon D40X
- Fujifilm X-T20 vs Nikon D40X
- Fujifilm X-T50 vs Nikon D40X
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Specifications: Nikon D40X vs Olympus E-M1
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 | Nikon D40X | Olympus E-M1 |
|---|---|---|
| Camera Type | Digital single lens reflex | Mirrorless system camera |
| Camera Lens | Nikon F mount lenses | Micro Four Thirds lenses |
| Launch Date | March 2007 | September 2013 |
| Launch Price | USD 729 | USD 1,399 |
| Sensor Specs | Nikon D40X | Olympus E-M1 |
| Sensor Technology | CCD | CMOS |
| Sensor Format | APS-C Sensor | Four Thirds Sensor |
| Sensor Size | 23.6 x 15.8 mm | 17.3 x 13.0 mm |
| Sensor Area | 372.88 mm2 | 224.9 mm2 |
| Sensor Diagonal | 28.4 mm | 21.6 mm |
| Crop Factor | 1.5x | 2.0x |
| Sensor Resolution | 10 Megapixels | 15.9 Megapixels |
| Image Resolution | 3872 x 2592 pixels | 4608 x 3456 pixels |
| Pixel Pitch | 6.11 μm | 3.76 μm |
| Pixel Density | 2.69 MP/cm2 | 7.08 MP/cm2 |
| Moiré control | Anti-Alias filter | no AA filter |
| Movie Capability | no Video | 1080/30p Video |
| ISO Setting | 100 - 1,600 ISO | 200 - 25,600 ISO |
| ISO Boost | 100 - 3,200 ISO | 100 - 25,600 ISO |
| Image Processor | EXPEED | TruePIC VII |
| DXO Sensor Quality (score) | 63 | 73 |
| DXO Color Depth (bits) | 22.4 | 23.0 |
| DXO Dynamic Range (EV) | 11.4 | 12.7 |
| DXO Low Light (ISO) | 516 | 757 |
| Screen Specs | Nikon D40X | Olympus E-M1 |
| Viewfinder Type | Optical viewfinder | Electronic viewfinder |
| Viewfinder Field of View | 95% | 100% |
| Viewfinder Magnification | 0.53x | 0.74x |
| Viewfinder Resolution | 2360k dots | |
| LCD Framing | Live View | |
| Rear LCD Size | 2.5inch | 3.0inch |
| LCD Resolution | 230k dots | 1037k dots |
| LCD Attachment | Fixed screen | Tilting screen |
| Touch Input | no Touchscreen | Touchscreen |
| Shooting Specs | Nikon D40X | Olympus E-M1 |
| Focus System | Phase-detect AF | On-Sensor Phase-detect |
| Manual Focusing Aid | no Peaking Feature | Focus Peaking |
| Max Shutter Speed (mechanical) | 1/4000s | 1/8000s |
| Continuous Shooting | 3 shutter flaps/s | 10 shutter flaps/s |
| Shutter Life Expectancy | 50 000 actuations | 150 000 actuations |
| Electronic Shutter | no E-Shutter | YES |
| Time-Lapse Photography | no Intervalometer | Intervalometer built-in |
| Image Stabilization | Lens stabilization only | In-body stabilization |
| Fill Flash | Built-in Flash | no On-Board Flash |
| Storage Medium | SDHC cards | SDXC cards |
| Single or Dual Card Slots | Single card slot | Single card slot |
| UHS card support | no | UHS-I |
| Connectivity Specs | Nikon D40X | Olympus E-M1 |
| External Flash | Hotshoe | Hotshoe |
| Studio Flash | no PC Sync | PC Sync socket |
| USB Connector | USB 2.0 | USB 2.0 |
| HDMI Port | no HDMI | micro HDMI |
| Microphone Port | no MIC socket | External MIC port |
| Wifi Support | no Wifi | Wifi built-in |
| Body Specs | Nikon D40X | Olympus E-M1 |
| Environmental Sealing | not weather sealed | Weathersealed body |
| Battery Type | Nikon EN-EL9 | Olympus BLN-1 |
| Battery Life (CIPA) | 520 shots per charge | 350 shots per charge |
| Body Dimensions |
124 x 94 x 64 mm (4.9 x 3.7 x 2.5 in) |
130 x 94 x 63 mm (5.1 x 3.7 x 2.5 in) |
| Camera Weight | 522 g (18.4 oz) | 497 g (17.5 oz) |

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