Nikon D40X vs Sony A6100
The Nikon D40X and the Sony Alpha A6100 are two digital cameras that were revealed to the public, respectively, in March 2007 and August 2019. The D40X is a DSLR, while the A6100 is a mirrorless interchangeable lens camera. Both cameras are equipped with an APS-C sensor. The Nikon has a resolution of 10 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 D40X and the Sony Alpha A6100? 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 D40X and the Sony A6100 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 size dimensions are rounded to the nearest millimeter.
The D40X can be obtained in two different colors (black, silver), while the A6100 is available in three color-versions (black, silver, white).
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A6100 is considerably smaller (31 percent) than the Nikon D40X. Moreover, the A6100 is markedly lighter (24 percent) than the D40X. In this context, it is worth noting that neither the D40X nor the A6100 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. 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 (D40X) and the Sony E-Mount Lens Catalog (A6100). Mirrorless cameras, such as the A6100, 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 EN-EL9 battery, while the A6100 can take 420 images on a single charge of its NP-FW50 power pack. The power pack in the A6100 can be charged via the USB port, which can be very convenient when travelling.
The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.
|1.||Nikon D40X||124 mm||94 mm||64 mm||522 g||520||n||Mar 2007||729|
|2.||Sony A6100||120 mm||67 mm||59 mm||396 g||420||n||Aug 2019||749|
|3.||Canon M50||116 mm||88 mm||59 mm||390 g||235||n||Feb 2018||779|
|4.||Canon 450D||129 mm||98 mm||62 mm||524 g||500||n||Jan 2008||799|
|5.||Canon 400D||127 mm||84 mm||65 mm||556 g||370||n||Aug 2006||799|
|6.||Nikon D3100||124 mm||96 mm||75 mm||505 g||550||n||Aug 2010||599|
|7.||Nikon D3000||126 mm||97 mm||64 mm||536 g||500||n||Jul 2009||599|
|8.||Nikon D5000||127 mm||104 mm||80 mm||590 g||510||n||Apr 2009||749|
|9.||Nikon D60||126 mm||94 mm||64 mm||522 g||500||n||Jan 2008||629|
|10.||Nikon D90||132 mm||103 mm||77 mm||703 g||850||n||Aug 2008||1,299|
|11.||Nikon D40||124 mm||94 mm||64 mm||522 g||470||n||Nov 2006||499|
|12.||Olympus E-420||130 mm||91 mm||53 mm||440 g||500||n||Mar 2008||599|
|13.||Panasonic L10||135 mm||96 mm||78 mm||556 g||450||n||Aug 2007||599|
|14.||Sony ZV-E10||115 mm||64 mm||45 mm||343 g||440||n||Jul 2021||699|
|15.||Sony A6400||120 mm||67 mm||50 mm||403 g||410||Y||Jan 2019||899|
|16.||Sony A6000||120 mm||67 mm||45 mm||344 g||360||n||Feb 2014||599|
|17.||Sony A3000||128 mm||91 mm||85 mm||411 g||470||n||Aug 2013||329|
|Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
Any camera decision will naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The D40X was somewhat cheaper (by 3 percent) than the A6100 at launch, but both cameras fall into the same price category. 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.
The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units in a sensor of the same technological generation. 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 A6100 is 2 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 A6100 offers a higher resolution of 24 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 3.91μm versus 6.11μm for the D40X). However, it should be noted that the A6100 is much more recent (by 12 years and 5 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.
The resolution advantage of the Sony A6100 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A6100 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 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 A6100 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 Sony Alpha A6100 are ISO 100 to ISO 32000, with the possibility to increase the ISO range to 100-51200.
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.
|12.||Olympus E-420||Four Thirds||10.0||3648||2736||none||21.5||10.4||527||56|
|13.||Panasonic L10||Four Thirds||10.0||3648||2736||none||21.3||10.8||429||55|
|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 can also record movies. The A6100 indeed provides for movie recording, while the D40X does not. The highest resolution format that the A6100 can use is 4K/30p.
Apart from body and sensor, cameras can and do differ across a variety of features. For example, the A6100 has an electronic viewfinder (1440k 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 A6100 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 A6100 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 adjacent table lists some of the other core features of the Nikon D40X and Sony A6100 along with similar information for a selection of comparators.
|1.||Nikon D40X||optical||n||2.5 / 230||fixed||n||1/4000s||3.0/s||Y||n|
|2.||Sony A6100||1440||n||3.0 / 922||tilting||Y||1/4000s||11.0/s||Y||n|
|3.||Canon M50||2360||n||3.0 / 1040||swivel||Y||1/4000s||10.0/s||Y||n|
|4.||Canon 450D||optical||n||3.0 / 230||fixed||n||1/4000s||3.5/s||Y||n|
|5.||Canon 400D||optical||n||2.5 / 230||fixed||n||1/4000s||3.0/s||Y||n|
|6.||Nikon D3100||optical||n||3.0 / 230||fixed||n||1/4000s||3.0/s||Y||n|
|7.||Nikon D3000||optical||n||3.0 / 230||fixed||n||1/4000s||3.0/s||Y||n|
|8.||Nikon D5000||optical||n||2.7 / 230||full-flex||n||1/4000s||4.0/s||Y||n|
|9.||Nikon D60||optical||n||2.5 / 230||fixed||n||1/4000s||3.0/s||Y||n|
|10.||Nikon D90||optical||Y||3.0 / 920||fixed||n||1/4000s||4.5/s||Y||n|
|11.||Nikon D40||optical||n||2.5 / 230||fixed||n||1/4000s||2.5/s||Y||n|
|12.||Olympus E-420||optical||n||2.7 / 215||fixed||n||1/4000s||3.5/s||Y||n|
|13.||Panasonic L10||optical||n||2.5 / 207||swivel||n||1/4000s||3.0/s||Y||n|
|14.||Sony ZV-E10||none||n||3.0 / 922||swivel||Y||1/4000s||11.0/s||n||n|
|15.||Sony A6400||2359||n||3.0 / 922||tilting||Y||1/4000s||11.0/s||Y||n|
|16.||Sony A6000||1440||n||3.0 / 922||tilting||n||1/4000s||11.0/s||Y||n|
|17.||Sony A3000||202||n||3.0 / 230||fixed||n||1/4000s||2.5/s||Y||n|
|Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.|
One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The A6100 has a touchscreen, while the D40X has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.The A6100 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 D40X 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 A6100 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 Sony A6100 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 A6100 uses SDXC or Memory Stick PRO Duo cards. The A6100 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.
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 Sony Alpha A6100 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Mic / Speaker
|1.||Nikon D40X||Y||- / -||-||-||-||2.0||-||-||-|
|2.||Sony A6100||Y||stereo / mono||Y||-||micro||2.0||Y||Y||Y|
|3.||Canon M50||Y||stereo / mono||Y||-||micro||2.0||Y||-||Y|
|4.||Canon 450D||Y||- / -||-||-||mini||2.0||-||-||-|
|5.||Canon 400D||Y||- / -||-||-||-||2.0||-||-||-|
|6.||Nikon D3100||Y||mono / mono||-||-||mini||2.0||-||-||-|
|7.||Nikon D3000||Y||- / -||-||-||-||2.0||-||-||-|
|8.||Nikon D5000||Y||mono / mono||-||-||mini||2.0||-||-||-|
|9.||Nikon D60||Y||- / -||-||-||-||2.0||-||-||-|
|10.||Nikon D90||Y||mono / mono||-||-||mini||2.0||-||-||-|
|11.||Nikon D40||Y||- / -||-||-||-||2.0||-||-||-|
|12.||Olympus E-420||Y||- / -||-||-||-||2.0||-||-||-|
|13.||Panasonic L10||Y||- / -||-||-||-||2.0||-||-||-|
|14.||Sony ZV-E10||Y||stereo / mono||Y||Y||micro||3.2||Y||Y||Y|
|15.||Sony A6400||Y||stereo / mono||Y||-||micro||2.0||Y||Y||Y|
|16.||Sony A6000||Y||stereo / mono||-||-||micro||2.0||Y||Y||-|
|17.||Sony A3000||Y||stereo / mono||-||-||mini||2.0||-||-||-|
It is notable that the A6100 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.
Both the D40X and the A6100 have been discontinued, but can regularly be found used on eBay. The D40X was replaced by the Nikon D60 , while the A6100 was followed by the Sony A6600. 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? Is there a clear favorite between the Nikon D40X and the Sony A6100? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.
Arguments in favor of the Nikon D40X:
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Longer lasting: Can take more shots (520 versus 420) on a single battery charge.
- More heavily discounted: Has been available for much longer (launched in March 2007).
Advantages of the Sony Alpha A6100:
- More detail: Has more megapixels (24 vs 10MP), which boosts linear resolution by 55%.
- 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 2.5") for image review and settings control.
- More detailed LCD: Has a higher resolution rear screen (922k 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.
- 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.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- More compact: Is smaller (120x67mm vs 124x94mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 126g or 24 percent) and is thus easier to take along.
- Easier travel charging: Can be conveniently charged via its USB port.
- 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.
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
- More modern: Reflects 12 years and 5 months of technical progress since the D40X launch.
If the count of individual advantages (bullet points above) is taken as a guide, the A6100 is the clear winner of the contest (23 : 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 D40X and the Sony A6100 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 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 D40X or the A6100 perform in practice. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.
This is why hands-on reviews by experts are important. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], 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 D40X||..||79/100||..||+ +||4/5||4/5||Mar 2007||729|
|2.||Sony A6100||..||..||4/5||82/100||4/5||5/5||Aug 2019||749|
|3.||Canon M50||..||+||4/5||79/100||..||3.5/5||Feb 2018||779|
|4.||Canon 450D||..||+ +||..||+ +||4/5||4.5/5||Jan 2008||799|
|5.||Canon 400D||..||+ +||..||+ +||o||4/5||Aug 2006||799|
|6.||Nikon D3100||5/5||+ +||..||72/100||4.5/5||4.5/5||Aug 2010||599|
|7.||Nikon D3000||..||+||..||72/100||4/5||4.5/5||Jul 2009||599|
|8.||Nikon D5000||..||+ +||..||75/100||4/5||4.5/5||Apr 2009||749|
|9.||Nikon D60||..||80/100||..||+ +||4/5||4.5/5||Jan 2008||629|
|10.||Nikon D90||..||+ +||..||+ +||4/5||4.5/5||Aug 2008||1,299|
|11.||Nikon D40||..||81/100||..||+ +||o||4.5/5||Nov 2006||499|
|12.||Olympus E-420||..||85/100||..||+ +||4/5||4.5/5||Mar 2008||599|
|13.||Panasonic L10||..||85/100||..||+||3.5/5||4/5||Aug 2007||599|
|14.||Sony ZV-E10||4/5||..||4/5||82/100||4.5/5||4.5/5||Jul 2021||699|
|15.||Sony A6400||4/5||+||4/5||85/100||4.5/5||4/5||Jan 2019||899|
|16.||Sony A6000||5/5||+||4.5/5||80/100||4.5/5||5/5||Feb 2014||599|
|17.||Sony A3000||3/5||+||..||..||4/5||4/5||Aug 2013||329|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.
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. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
- Leica V-LUX 3 vs Sony A6100
- Nikon B700 vs Sony A6100
- Nikon D40X vs Nikon D800
- Nikon D40X vs Olympus E-PM1
- Nikon D40X vs Olympus TG-4
- Nikon D40X vs Panasonic TS7
- Nikon D40X vs Sony RX0 II
- Nikon D40X vs Sony RX10 III
- Nikon Z6 vs Sony A6100
- Olympus E-PM1 vs Sony A6100
- Pentax K-5 vs Sony A6100
- Sony A6100 vs Sony HX90V
Specifications: Nikon D40X vs Sony A6100
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||Sony A6100|
|Camera Type||Digital single lens reflex||Mirrorless system camera|
|Camera Lens||Nikon F mount lenses||Sony E mount lenses|
|Launch Date||March 2007||August 2019|
|Launch Price||USD 729||USD 749|
|Sensor Specs||Nikon D40X||Sony A6100|
|Sensor Format||APS-C Sensor||APS-C Sensor|
|Sensor Size||23.6 x 15.8 mm||23.5 x 15.6 mm|
|Sensor Area||372.88 mm2||366.6 mm2|
|Sensor Diagonal||28.4 mm||28.2 mm|
|Sensor Resolution||10 Megapixels||24 Megapixels|
|Image Resolution||3872 x 2592 pixels||6000 x 4000 pixels|
|Pixel Pitch||6.11 μm||3.91 μm|
|Pixel Density||2.69 MP/cm2||6.55 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||no Video||4K/30p Video|
|ISO Setting||100 - 1,600 ISO||100 - 32,000 ISO|
|ISO Boost||100 - 3,200 ISO||100 - 51,200 ISO|
|Image Processor||EXPEED||BIONZ X|
|DXO Sensor Quality (score)||63||..|
|DXO Color Depth (bits)||22.4||..|
|DXO Dynamic Range (EV)||11.4||..|
|DXO Low Light (ISO)||516||..|
|Screen Specs||Nikon D40X||Sony A6100|
|Viewfinder Type||Optical viewfinder||Electronic viewfinder|
|Viewfinder Field of View||95%||100%|
|Viewfinder Resolution||1440k dots|
|LCD Framing||Live View|
|Rear LCD Size||2.5inch||3.0inch|
|LCD Resolution||230k dots||922k dots|
|LCD Attachment||Fixed screen||Tilting screen|
|Touch Input||no Touchscreen||Touchscreen|
|Shooting Specs||Nikon D40X||Sony A6100|
|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||100 000 actuations|
|Electronic Shutter||no E-Shutter||YES|
|Time-Lapse Photography||no Intervalometer||Intervalometer built-in|
|Fill Flash||Built-in Flash||Built-in Flash|
|Storage Medium||SDHC cards||MS or SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||no||UHS-I|
|Connectivity Specs||Nikon D40X||Sony A6100|
|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|
|Near-Field Communication||no NFC||NFC built-in|
|Bluetooth Support||no Bluetooth||Bluetooth built-in|
|Body Specs||Nikon D40X||Sony A6100|
|Battery Life (CIPA)||520 shots per charge||420 shots per charge|
|In-Camera Charging||no USB charging||USB charging|
124 x 94 x 64 mm
(4.9 x 3.7 x 2.5 in)
120 x 67 x 59 mm
(4.7 x 2.6 x 2.3 in)
|Camera Weight||522 g (18.4 oz)||396 g (14.0 oz)|
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