Nikon D100 vs Olympus E-M10 III
The Nikon D100 and the Olympus OM-D E-M10 Mark III are two digital cameras that were officially introduced, respectively, in February 2002 and August 2017. The D100 is a DSLR, while the E-M10 III is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (D100) and a Four Thirds (E-M10 III) sensor. The Nikon has a resolution of 6 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.
Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D100 and the Olympus OM-D E-M10 Mark III? 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 Nikon D100 and the Olympus E-M10 III. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All size dimensions are rounded to the nearest millimeter.
The E-M10 III can be obtained in two different colors (black, silver), while the D100 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 Olympus E-M10 III is considerably smaller (39 percent) than the Nikon D100. Moreover, the E-M10 III is substantially lighter (47 percent) than the D100. In this context, it is worth noting that neither the D100 nor the E-M10 III 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. 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 (D100) and the Micro Four Thirds Lens Catalog (E-M10 III). Mirrorless cameras, such as the E-M10 III, 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.
The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. 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.
|1.||Nikon D100||144 mm||116 mm||81 mm||780 g||370||n||Feb 2002||1,999|
|2.||Olympus E-M10 III||122 mm||84 mm||50 mm||410 g||330||n||Aug 2017||649|
|3.||Canon 10D||150 mm||107 mm||75 mm||850 g||500||n||Feb 2003||1,999|
|4.||Nikon D90||132 mm||103 mm||77 mm||703 g||850||n||Aug 2008||1,299|
|5.||Nikon D300||147 mm||114 mm||74 mm||925 g||1000||Y||Aug 2007||1,799|
|6.||Nikon D40||124 mm||94 mm||64 mm||522 g||470||n||Nov 2006||499|
|7.||Nikon D80||132 mm||103 mm||77 mm||668 g||600||n||Aug 2006||999|
|8.||Nikon D50||133 mm||102 mm||76 mm||620 g||400||n||Apr 2005||749|
|9.||Nikon D70s||140 mm||111 mm||78 mm||679 g||500||n||Apr 2005||899|
|10.||Nikon D200||147 mm||113 mm||74 mm||920 g||400||Y||Nov 2005||1,699|
|11.||Nikon D70||140 mm||111 mm||78 mm||679 g||400||n||Jan 2004||999|
|12.||Nikon D1X||157 mm||153 mm||85 mm||1100 g||1200||Y||Feb 2001||5,999|
|13.||Olympus E-M10 IV||122 mm||84 mm||49 mm||383 g||360||n||Aug 2020||699|
|14.||Olympus E-PL10||117 mm||68 mm||39 mm||380 g||350||n||Oct 2019||599|
|15.||Olympus E-PL9||117 mm||68 mm||39 mm||380 g||350||n||Feb 2018||599|
|16.||Olympus E-PL8||115 mm||67 mm||38 mm||357 g||350||n||Sep 2016||549|
|17.||Olympus E-M10 II||120 mm||83 mm||47 mm||390 g||320||n||Aug 2015||649|
|Notes: 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 manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The E-M10 III was launched at a markedly lower price (by 68 percent) than the D100, 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.
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 generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have richer color-depth than smaller pixels in a sensor of the same technological generation. 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.
Of the two cameras under consideration, the Nikon D100 features an APS-C sensor and the Olympus E-M10 III a Four Thirds sensor. The sensor area in the E-M10 III is 39 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 D100 has a native 3:2 aspect ratio, while the one in the E-M10 III offers a 4:3 aspect.
Despite having a smaller sensor, the E-M10 III offers a higher resolution of 15.9 megapixels, compared with 6 MP of the D100. 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 7.85μm for the D100). However, it should be noted that the E-M10 III is much more recent (by 15 years and 6 months) than the D100, 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-M10 III has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Olympus E-M10 III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the E-M10 III 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 D100 are 15 x 10 inches or 38.2 x 25.4 cm for good quality, 12 x 8 inches or 30.6 x 20.3 cm for very good quality, and 10 x 6.7 inches or 25.5 x 16.9 cm for excellent quality prints.
The Nikon D100 has a native sensitivity range from ISO 200 to ISO 800, which can be extended to ISO 200-1600. The corresponding ISO settings for the Olympus OM-D E-M10 Mark III are ISO 200 to ISO 25600, with the possibility to increase the ISO range to 100-25600.
Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
| DXO |
|2.||Olympus E-M10 III||Four Thirds||15.9||4608||3456||4K/30p||..||..||..||..|
|13.||Olympus E-M10 IV||Four Thirds||20.2||5184||3888||4K/30p||..||..||..||..|
|14.||Olympus E-PL10||Four Thirds||15.9||4608||3456||4K/30p||..||..||..||..|
|15.||Olympus E-PL9||Four Thirds||15.9||4608||3456||4K/30p||..||..||..||..|
|16.||Olympus E-PL8||Four Thirds||15.9||4608||3456||1080/30p||..||..||..||..|
|17.||Olympus E-M10 II||Four Thirds||15.9||4608||3456||1080/60p||23.1||12.5||842||73|
Many modern cameras are not only capable of taking still images, but can also record movies. The E-M10 III indeed provides for movie recording, while the D100 does not. The highest resolution format that the E-M10 III can use is 4K/30p.
Apart from body and sensor, cameras can and do differ across a range of features. For example, the E-M10 III has an electronic viewfinder (2360k dots), while the D100 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-M10 III offers a wider field of view (100%) than the one in the D100 (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the E-M10 III has a higher magnification (0.62x 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 D100 and Olympus E-M10 III along with similar information for a selection of comparators.
|2.||Olympus E-M10 III||2360||n||3.0||1040||tilting||Y||1/4000s||8.6||Y||Y|
|13.||Olympus E-M10 IV||2360||n||3.0||1040||tilting||Y||1/4000s||15.0||Y||Y|
|17.||Olympus E-M10 II||2360||n||3.0||1040||tilting||Y||1/4000s||8.0||Y||Y|
One feature that is present on the D100, but is missing on the E-M10 III 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 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-M10 III is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).
The Olympus E-M10 III has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.
The D100 writes its imaging data to Compact Flash cards, while the E-M10 III 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 Nikon D100 and Olympus OM-D E-M10 Mark III and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
|2.||Olympus E-M10 III||Y||stereo||mono||-||-||micro||2.0||Y||-||-|
|13.||Olympus E-M10 IV||Y||stereo||mono||-||-||micro||2.0||Y||-||Y|
|17.||Olympus E-M10 II||Y||stereo||mono||-||-||micro||2.0||Y||-||-|
It is notable that the E-M10 III offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the D100 does not provide wifi capability.
Both the D100 and the E-M10 III have been discontinued, but can regularly be found used on eBay. The D100 was replaced by the Nikon D200, while the E-M10 III was followed by the Olympus E-M10 IV. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Nikon and Olympus websites.
So how do things add up? Which of the two cameras – the Nikon D100 or the Olympus E-M10 III – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.
Arguments in favor of the Nikon D100:
- 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.
- Easier setting verification: Features an LCD display on top to control shooting parameters.
- Longer lasting: Can take more shots (370 versus 330) on a single battery charge.
- More heavily discounted: Has been available for much longer (launched in February 2002).
Advantages of the Olympus OM-D E-M10 Mark III:
- More detail: Has more megapixels (15.9 vs 6MP), which boosts linear resolution by 59%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Broader imaging potential: Can capture not only stills but also 4K/30p video.
- 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 (0.62x vs 0.53x).
- Larger screen: Has a bigger rear LCD (3.0" vs 1.8") for image review and settings control.
- More detailed LCD: Has a higher resolution rear screen (1040k vs 118k 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 burst: Shoots at higher frequency (8.6 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.
- More compact: Is smaller (122x84mm vs 144x116mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 370g or 47 percent) and is thus easier to take along.
- 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.
- Faster data transfer: Supports a more advanced USB protocol (2.0 vs 1.1).
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- More affordable: Was introduced into a lower priced category (68 percent cheaper at launch).
- More modern: Reflects 15 years and 6 months of technical progress since the D100 launch.
If the number of relative strengths (bullet points above) is taken as a guide, the E-M10 III is the clear winner of the contest (21 : 5 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding on a new camera. A professional wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.
How about other alternatives? Do the specifications of the Nikon D100 and the Olympus E-M10 III 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 comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the D100 or the E-M10 III. 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.
This is why expert reviews are important. The adjacent summary-table relays the overall verdicts of several of the most popular 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.||Nikon D100||..||..||+ +||o||..||Feb 2002||1,999|
|2.||Olympus E-M10 III||..||+||80/100||4.5/5||4.5/5||Aug 2017||649|
|3.||Canon 10D||..||..||+ +||..||..||Feb 2003||1,999|
|4.||Nikon D90||..||+ +||+ +||4/5||4.5/5||Aug 2008||1,299|
|5.||Nikon D300||..||+ +||+ +||5/5||4.5/5||Aug 2007||1,799|
|6.||Nikon D40||..||81/100||+ +||o||4.5/5||Nov 2006||499|
|7.||Nikon D80||..||+||+ +||o||4.5/5||Aug 2006||999|
|8.||Nikon D50||..||78/100||+ +||4/5||4.5/5||Apr 2005||749|
|9.||Nikon D70s||..||..||..||..||5/5||Apr 2005||899|
|10.||Nikon D200||..||+ +||+ +||o||..||Nov 2005||1,699|
|11.||Nikon D70||..||..||+ +||..||..||Jan 2004||999|
|12.||Nikon D1X||..||..||+ +||..||..||Feb 2001||5,999|
|13.||Olympus E-M10 IV||4.5/5||..||..||4.5/5||4.5/5||Aug 2020||699|
|14.||Olympus E-PL10||..||..||77/100||..||4/5||Oct 2019||599|
|15.||Olympus E-PL9||..||+||..||4.5/5||4/5||Feb 2018||599|
|16.||Olympus E-PL8||..||..||..||4.5/5||4/5||Sep 2016||549|
|17.||Olympus E-M10 II||4.5/5||+ +||80/100||5/5||5/5||Aug 2015||649|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
Care should be taken when interpreting the review scores above, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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. Also, please note that some of the review sites have changed their methodology and reporting over time.
Other camera comparisons
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Specifications: Nikon D100 vs Olympus E-M10 III
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 D100||Olympus E-M10 III|
|Camera Type||Digital single lens reflex||Mirrorless system camera|
|Camera Lens||Nikon F mount lenses||Micro Four Thirds lenses|
|Launch Date||February 2002||August 2017|
|Launch Price||USD 1,999||USD 649|
|Sensor Specs||Nikon D100||Olympus E-M10 III|
|Sensor Format||APS-C Sensor||Four Thirds Sensor|
|Sensor Size||23.7 x 15.6 mm||17.3 x 13.0 mm|
|Sensor Area||369.72 mm2||224.9 mm2|
|Sensor Diagonal||28.4 mm||21.6 mm|
|Sensor Resolution||6 Megapixels||15.9 Megapixels|
|Image Resolution||3008 x 2000 pixels||4608 x 3456 pixels|
|Pixel Pitch||7.85 μm||3.76 μm|
|Pixel Density||1.63 MP/cm2||7.08 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||no Video||4K/30p Video|
|ISO Setting||200 - 800 ISO||200 - 25,600 ISO|
|ISO Boost||200 - 1,600 ISO||100 - 25,600 ISO|
|Screen Specs||Nikon D100||Olympus E-M10 III|
|Viewfinder Type||Optical viewfinder||Electronic viewfinder|
|Viewfinder Field of View||95%||100%|
|Viewfinder Resolution||2360k dots|
|Top-Level Screen||Control Panel||no Top Display|
|LCD Framing||Live View|
|Rear LCD Size||1.8inch||3.0inch|
|LCD Resolution||118k dots||1040k dots|
|LCD Attachment||Fixed screen||Tilting screen|
|Touch Input||no Touchscreen||Touchscreen|
|Shooting Specs||Nikon D100||Olympus E-M10 III|
|Focus System||Phase-detect AF||Contrast-detect AF|
|Manual Focusing Aid||no Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000s||1/4000s|
|Continuous Shooting||3 shutter flaps/s||8.6 shutter flaps/s|
|Electronic Shutter||no E-Shutter||up to 1/16000s|
|Time-Lapse Photography||no Intervalometer||Intervalometer built-in|
|Image Stabilization||Lens stabilization only||In-body stabilization|
|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||Nikon D100||Olympus E-M10 III|
|USB Connector||USB 1.1||USB 2.0|
|HDMI Port||no HDMI||micro HDMI|
|Wifi Support||no Wifi||Wifi built-in|
|Body Specs||Nikon D100||Olympus E-M10 III|
|Battery Life (CIPA)||370 shots per charge||330 shots per charge|
144 x 116 x 81 mm
(5.7 x 4.6 x 3.2 in)
122 x 84 x 50 mm
(4.8 x 3.3 x 2.0 in)
|Camera Weight||780 g (27.5 oz)||410 g (14.5 oz)|
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