Nikon D100 vs Sony A6400
The Nikon D100 and the Sony Alpha A6400 are two enthusiast cameras that were revealed to the public, respectively, in February 2002 and January 2019. The D100 is a DSLR, while the A6400 is a mirrorless interchangeable lens camera. Both cameras are equipped with an APS-C sensor. The Nikon has a resolution of 6 megapixels, whereas the Sony 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 Nikon D100 and the Sony Alpha A6400? 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 physical size and weight of the Nikon D100 and the Sony A6400 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 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 Sony A6400 is considerably smaller (52 percent) than the Nikon D100. Moreover, the A6400 is substantially lighter (48 percent) than the D100. It is noteworthy in this context that the A6400 is splash and dust-proof, while the D100 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. Both cameras have similarly sized sensors, but DSLRs have a larger flange-to-focal plane distance than mirrorless cameras, which imposes contraints on the optical engineering process and generally leads to bigger and heavier lenses. You can compare the optics available for the two cameras in the Nikon Lens Catalog (D100) and the Sony E-Mount Lens Catalog (A6400). Mirrorless cameras, such as the A6400, 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 D100 gets 370 shots out of its EN-EL3 battery, while the A6400 can take 410 images on a single charge of its NP-FW50 power pack. The power pack in the A6400 can be charged via the USB port, which can be very convenient when travelling.
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.
|1.||Nikon D100||144 mm||116 mm||81 mm||780 g||370||n||Feb 2002||1,999|
|2.||Sony A6400||120 mm||67 mm||50 mm||403 g||410||Y||Jan 2019||899|
|3.||Canon 10D||150 mm||107 mm||75 mm||850 g||500||n||Feb 2003||1,999|
|4.||Nikon D5300||125 mm||98 mm||76 mm||480 g||600||n||Oct 2013||799|
|5.||Nikon D90||132 mm||103 mm||77 mm||703 g||850||n||Aug 2008||1,299|
|6.||Nikon D300||147 mm||114 mm||74 mm||925 g||1000||Y||Aug 2007||1,799|
|7.||Nikon D40||124 mm||94 mm||64 mm||522 g||470||n||Nov 2006||499|
|8.||Nikon D80||132 mm||103 mm||77 mm||668 g||600||n||Aug 2006||999|
|9.||Nikon D50||133 mm||102 mm||76 mm||620 g||400||n||Apr 2005||749|
|10.||Nikon D70s||140 mm||111 mm||78 mm||679 g||500||n||Apr 2005||899|
|11.||Nikon D200||147 mm||113 mm||74 mm||920 g||400||Y||Nov 2005||1,699|
|12.||Nikon D70||140 mm||111 mm||78 mm||679 g||400||n||Jan 2004||999|
|13.||Nikon D1X||157 mm||153 mm||85 mm||1100 g||1200||Y||Feb 2001||5,999|
|14.||Sony A6100||120 mm||67 mm||59 mm||396 g||420||n||Aug 2019||749|
|15.||Sony A6300||120 mm||67 mm||49 mm||404 g||400||Y||Feb 2016||999|
|16.||Sony A5100||110 mm||63 mm||36 mm||283 g||400||n||Aug 2014||549|
|17.||Sony A6000||120 mm||67 mm||45 mm||344 g||360||n||Feb 2014||599|
|Notes: 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 A6400 was launched at a markedly lower price (by 55 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 size of the imaging sensor is a crucial determinant 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. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to 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 A6400 is 1 percent smaller. They nevertheless have the same format factor of 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
Despite having a slightly smaller sensor, the A6400 offers a higher resolution of 24 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 3.91μm versus 7.85μm for the D100). However, it should be noted that the A6400 is much more recent (by 16 years and 10 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.
The resolution advantage of the Sony A6400 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A6400 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 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 A6400 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
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 Sony Alpha A6400 are ISO 100 to ISO 32000, with the possibility to increase the ISO range to 100-102400.
Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
|Note: DXO values in italics represent estimates based on sensor size and age.|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. The A6400 indeed provides for movie recording, while the D100 does not. The highest resolution format that the A6400 can use is 4K/30p.
Beyond body and sensor, cameras can and do differ across a range of features. For example, the A6400 has an electronic viewfinder (2359k 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 A6400 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 A6400 has a higher magnification (0.70x 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 Nikon D100, the Sony A6400, and comparable cameras.
|1.||Nikon D100||optical||Y||1.8 / 118||fixed||n||1/4000s||3.0||Y||n|
|2.||Sony A6400||2359||n||3.0 / 922||tilting||Y||1/4000s||11.0||Y||n|
|3.||Canon 10D||optical||Y||1.8 / 118||fixed||n||1/4000s||3.0||Y||n|
|4.||Nikon D5300||optical||n||3.2 / 1037||swivel||n||1/4000s||5.0||Y||n|
|5.||Nikon D90||optical||Y||3.0 / 920||fixed||n||1/4000s||4.5||Y||n|
|6.||Nikon D300||optical||Y||3.0 / 922||fixed||n||1/8000s||6.0||Y||n|
|7.||Nikon D40||optical||n||2.5 / 230||fixed||n||1/4000s||2.5||Y||n|
|8.||Nikon D80||optical||n||2.5 / 230||fixed||n||1/4000s||3.0||Y||n|
|9.||Nikon D50||optical||n||2.0 / 130||fixed||n||1/4000s||2.5||Y||n|
|10.||Nikon D70s||optical||n||2.0 / 130||fixed||n||1/8000s||3.0||Y||n|
|11.||Nikon D200||optical||Y||2.5 / 230||fixed||n||1/8000s||5.0||Y||n|
|12.||Nikon D70||optical||n||1.8 / 130||fixed||n||1/8000s||3.0||Y||n|
|13.||Nikon D1X||optical||Y||2.0 / 120||fixed||n||1/16000s||3.0||n||n|
|14.||Sony A6100||1440||n||3.0 / 922||tilting||Y||1/4000s||11.0||Y||n|
|15.||Sony A6300||2359||n||3.0 / 922||tilting||n||1/4000s||11.0||Y||n|
|16.||Sony A5100||none||n||3.0 / 922||tilting||Y||1/4000s||6.0||Y||n|
|17.||Sony A6000||1440||n||3.0 / 922||tilting||n||1/4000s||11.0||Y||n|
One feature that is present on the D100, but is missing on the A6400 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 A6400 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 D100 does not have a selfie-screen.
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 A6400 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 D100 writes its imaging data to Compact Flash cards, while the A6400 uses SDXC or Memory Stick PRO Duo 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 Sony Alpha A6400 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Mic / Speaker
|1.||Nikon D100||Y||- / -||-||-||-||1.1||-||-||-|
|2.||Sony A6400||Y||stereo / mono||Y||-||micro||2.0||Y||Y||Y|
|3.||Canon 10D||Y||- / -||-||-||-||1.1||-||-||-|
|4.||Nikon D5300||Y||stereo / mono||Y||-||mini||2.0||Y||-||-|
|5.||Nikon D90||Y||mono / mono||-||-||mini||2.0||-||-||-|
|6.||Nikon D300||Y||- / -||-||-||mini||2.0||-||-||-|
|7.||Nikon D40||Y||- / -||-||-||-||2.0||-||-||-|
|8.||Nikon D80||Y||- / -||-||-||-||2.0||-||-||-|
|9.||Nikon D50||Y||- / -||-||-||-||2.0||-||-||-|
|10.||Nikon D70s||Y||- / -||-||-||-||2.0||-||-||-|
|11.||Nikon D200||Y||- / -||-||-||-||2.0||-||-||-|
|12.||Nikon D70||Y||- / -||-||-||-||1.0||-||-||-|
|13.||Nikon D1X||Y||- / -||-||-||-||FW||-||-||-|
|14.||Sony A6100||Y||stereo / mono||Y||-||micro||2.0||Y||Y||Y|
|15.||Sony A6300||Y||stereo / mono||Y||-||micro||2.0||Y||Y||-|
|16.||Sony A5100||-||stereo / mono||-||-||micro||2.0||Y||Y||-|
|17.||Sony A6000||Y||stereo / mono||-||-||micro||2.0||Y||Y||-|
It is notable that the A6400 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.
The A6400 is a recent model that features in the current product line-up of Sony. In contrast, the D100 has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the D100 was succeeded by the Nikon D200. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Nikon and Sony websites.
So how do things add up? Which of the two cameras – the Nikon D100 or the Sony A6400 – 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 D100:
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Easier setting verification: Features an LCD display on top to control shooting parameters.
- More heavily discounted: Has been available for much longer (launched in February 2002).
Reasons to prefer the Sony Alpha A6400:
- More detail: Has more megapixels (24 vs 6MP), which boosts linear resolution by 100%.
- Broader imaging potential: Can capture not only stills but also 4K/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 (0.70x 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 (922k 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.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Faster burst: Shoots at higher frequency (11 vs 3 flaps/sec) to capture the decisive moment.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- More compact: Is smaller (120x67mm vs 144x116mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 377g or 48 percent) and is thus easier to take along.
- Longer lasting: Gets more shots (410 versus 370) out of a single battery charge.
- Easier travel charging: Can be conveniently charged via its USB port.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- 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.
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- More affordable: Was introduced into a lower priced category (55 percent cheaper at launch).
- More modern: Reflects 16 years and 10 months of technical progress since the D100 launch.
If the count of individual advantages (bullet points above) is taken as a guide, the A6400 is the clear winner of the contest (25 : 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 Nikon D100 and the Sony A6400 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 D100 or the A6400. 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 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.
|1.||Nikon D100||..||..||..||+ +||o||..||Feb 2002||1,999|
|2.||Sony A6400||4/5||+||4/5||85/100||4.5/5||4/5||Jan 2019||899|
|3.||Canon 10D||..||..||..||+ +||..||..||Feb 2003||1,999|
|4.||Nikon D5300||4/5||+ +||..||79/100||4.5/5||4.5/5||Oct 2013||799|
|5.||Nikon D90||..||+ +||..||+ +||4/5||4.5/5||Aug 2008||1,299|
|6.||Nikon D300||..||+ +||..||+ +||5/5||4.5/5||Aug 2007||1,799|
|7.||Nikon D40||..||81/100||..||+ +||o||4.5/5||Nov 2006||499|
|8.||Nikon D80||..||+||..||+ +||o||4.5/5||Aug 2006||999|
|9.||Nikon D50||..||78/100||..||+ +||4/5||4.5/5||Apr 2005||749|
|10.||Nikon D70s||..||..||..||..||..||5/5||Apr 2005||899|
|11.||Nikon D200||..||+ +||..||+ +||o||..||Nov 2005||1,699|
|12.||Nikon D70||..||..||..||+ +||..||..||Jan 2004||999|
|13.||Nikon D1X||..||..||..||+ +||..||..||Feb 2001||5,999|
|14.||Sony A6100||..||..||4/5||82/100||4/5||5/5||Aug 2019||749|
|15.||Sony A6300||4.5/5||+||..||85/100||5/5||5/5||Feb 2016||999|
|16.||Sony A5100||4.5/5||+||..||..||4.5/5||5/5||Aug 2014||549|
|17.||Sony A6000||5/5||+||4.5/5||80/100||4.5/5||5/5||Feb 2014||599|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
Care should be taken when interpreting the review scores above, 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 rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, please note that some of the review sites have changed their methodology and reporting over time.
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. 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: Nikon D100 vs Sony A6400
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||Sony A6400|
|Camera Type||Digital single lens reflex||Mirrorless system camera|
|Camera Lens||Nikon F mount lenses||Sony E mount lenses|
|Launch Date||February 2002||January 2019|
|Launch Price||USD 1,999||USD 899|
|Sensor Specs||Nikon D100||Sony A6400|
|Sensor Format||APS-C Sensor||APS-C Sensor|
|Sensor Size||23.7 x 15.6 mm||23.5 x 15.6 mm|
|Sensor Area||369.72 mm2||366.6 mm2|
|Sensor Diagonal||28.4 mm||28.2 mm|
|Sensor Resolution||6 Megapixels||24 Megapixels|
|Image Resolution||3008 x 2000 pixels||6000 x 4000 pixels|
|Pixel Pitch||7.85 μm||3.91 μm|
|Pixel Density||1.63 MP/cm2||6.55 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||no Video||4K/30p Video|
|ISO Setting||200 - 800 ISO||100 - 32,000 ISO|
|ISO Boost||200 - 1,600 ISO||100 - 102,400 ISO|
|DXO Sensor Quality (score)||..||83|
|DXO Color Depth (bits)||..||24|
|DXO Dynamic Range (EV)||..||13.6|
|DXO Low Light (ISO)||..||1431|
|Screen Specs||Nikon D100||Sony A6400|
|Viewfinder Type||Optical viewfinder||Electronic viewfinder|
|Viewfinder Field of View||95%||100%|
|Viewfinder Resolution||2359k dots|
|Top-Level Screen||Control Panel||no Top Display|
|LCD Framing||Live View|
|Rear LCD Size||1.8inch||3.0inch|
|LCD Resolution||118k dots||922k dots|
|LCD Attachment||Fixed screen||Tilting screen|
|Touch Input||no Touchscreen||Touchscreen|
|Shooting Specs||Nikon D100||Sony A6400|
|Focus System||Phase-detect AF||On-Sensor Phase-detect|
|Manual Focusing Aid||no Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000s||1/4000s|
|Continuous Shooting||3 shutter flaps/s||11 shutter flaps/s|
|Shutter Life Expectancy||50 000 actuations||200 000 actuations|
|Electronic Shutter||no E-Shutter||YES|
|Fill Flash||Built-in Flash||Built-in Flash|
|Storage Medium||CF cards||MS or SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|Connectivity Specs||Nikon D100||Sony A6400|
|USB Connector||USB 1.1||USB 2.0|
|HDMI Port||no HDMI||micro HDMI|
|Microphone Port||no MIC socket||External MIC port|
|Wifi Support||no Wifi||Wifi built-in|
|Near-Field Communication||no NFC||NFC built-in|
|Bluetooth Support||no Bluetooth||Bluetooth built-in|
|Body Specs||Nikon D100||Sony A6400|
|Environmental Sealing||not weather sealed||Weathersealed body|
|Battery Life (CIPA)||370 shots per charge||410 shots per charge|
|In-Camera Charging||no USB charging||USB charging|
144 x 116 x 81 mm
(5.7 x 4.6 x 3.2 in)
120 x 67 x 50 mm
(4.7 x 2.6 x 2.0 in)
|Camera Weight||780 g (27.5 oz)||403 g (14.2 oz)|
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