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Nikon D40 vs Sony A7S II

The Nikon D40 and the Sony Alpha 7S II are two digital cameras that were announced, respectively, in November 2006 and September 2015. The D40 is a DSLR, while the A7S II is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (D40) and a full frame (A7S II) sensor. The Nikon has a resolution of 6 megapixels, whereas the Sony provides 12 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Nikon D40
versus
Sony A7S II
Nikon D40   Sony A7S II
Digital single lens reflex Mirrorless system camera
Nikon F mount lenses Sony E mount lenses
6 MP – APS-C sensor 12 MP – Full Frame sensor
no Video 4K/30p Video
ISO 200-1,600 (200 - 3,200) ISO 100-102,400 (50 - 409,600)
Optical viewfinder Electronic viewfinder (2400k dots)
2.5" LCD – 230k dots 3.0" LCD – 1229k dots
Fixed screen (not touch-sensitive) Tilting screen (no touchscreen)
2.5 shutter flaps per second 5 shutter flaps per second
Lens stabilization onlyIn-body stabilization
not weather sealedWeathersealed body
470 shots per battery charge370 shots per battery charge
124 x 94 x 64 mm, 522 g 127 x 96 x 60 mm, 627 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D40 and the Sony Alpha 7S II? 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.

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Body comparison

The physical size and weight of the Nikon D40 and the Sony A7S II are illustrated in the side-by-side display below. 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 width, height and depth dimensions are rounded to the nearest millimeter.

Size Nikon D40 vs Sony A7S II
Compare D40 versus A7S II top
Comparison D40 or A7S II rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7S II is somewhat larger (5 percent) than the Nikon D40. Moreover, the A7S II is markedly heavier (20 percent) than the D40. It is noteworthy in this context that the A7S II is splash and dust-proof, while the D40 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 (D40) and the Sony FE Lens Catalog (A7S II). Mirrorless cameras, such as the A7S II, 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 D40 gets 470 shots out of its Nikon EN-EL9 battery, while the A7S II can take 370 images on a single charge of its Sony NP-FW50 power pack. The power pack in the A7S II 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. 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.

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Body Specifications
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Nikon D40 124 mm 94 mm 64 mm 522 g 470 n Nov 2006 499ebay.com
2.
 
Sony A7S II 127 mm 96 mm 60 mm 627 g 370 Y Sep 2015 2,999ebay.com
3.
 
Nikon D3400 124 mm 98 mm 76 mm 445 g 1200 n Aug 2016 499ebay.com
4.
 
Nikon D3300 124 mm 98 mm 76 mm 430 g 700 n Jan 2014 499ebay.com
5.
 
Nikon D3100 124 mm 96 mm 75 mm 505 g 550 n Aug 2010 599ebay.com
6.
 
Nikon D3000 126 mm 97 mm 64 mm 536 g 500 n Jul 2009 599ebay.com
7.
 
Nikon D60 126 mm 94 mm 64 mm 522 g 500 n Jan 2008 629ebay.com
8.
 
Nikon D40X 124 mm 94 mm 64 mm 522 g 520 n Mar 2007 729ebay.com
9.
 
Nikon D80 132 mm 103 mm 77 mm 668 g 600 n Aug 2006 999ebay.com
10.
 
Nikon D50 133 mm 102 mm 76 mm 620 g 400 n Apr 2005 749ebay.com
11.
 
Nikon D70s 140 mm 111 mm 78 mm 679 g 500 n Apr 2005 899ebay.com
12.
 
Nikon D70 140 mm 111 mm 78 mm 679 g 400 n Jan 2004 999ebay.com
13.
 
Sony A7 IV 131 mm 96 mm 80 mm 659 g 580 Y Oct 2021 2,499 amazon.com
14.
 
Sony A7S III 127 mm 97 mm 81 mm 699 g 600 Y Jul 2020 3,499 amazon.com
15.
 
Sony A7R IV 129 mm 96 mm 78 mm 665 g 670 Y Jul 2019 3,499ebay.com
16.
 
Sony A7R II 127 mm 96 mm 60 mm 625 g 290 Y Jun 2015 3,199ebay.com
17.
 
Sony A7S 127 mm 94 mm 48 mm 489 g 380 Y Apr 2014 2,499ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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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 D40 was launched at a markedly lower price (by 83 percent) than the A7S II, 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 size of the imaging sensor is a crucial determinant 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 more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Nikon D40 features an APS-C sensor and the Sony A7S II a full frame sensor. The sensor area in the A7S II is 129 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Nikon D40 and Sony A7S II sensor measures

With 12MP, the A7S II offers a higher resolution than the D40 (6MP), but the A7S II nevertheless has larger individual pixels (pixel pitch of 8.40μm versus 7.85μm for the D40) due to its larger sensor. Moreover, the A7S II is a much more recent model (by 8 years and 9 months) than the D40, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units.

The resolution advantage of the Sony A7S II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7S II for good quality output (200 dots per inch) amounts to 21.2 x 14.2 inches or 53.8 x 36 cm, for very good quality (250 dpi) 17 x 11.3 inches or 43.1 x 28.8 cm, and for excellent quality (300 dpi) 14.1 x 9.4 inches or 35.9 x 24 cm. The corresponding values for the Nikon D40 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 D40 has a native sensitivity range from ISO 200 to ISO 1600, which can be extended to ISO 200-3200. The corresponding ISO settings for the Sony Alpha 7S II are ISO 100 to ISO 102400, with the possibility to increase the ISO range to 50-409600.

In terms of underlying technology, the D40 is build around a CCD sensor, while the A7S II 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.

D40 versus A7S II MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). Of the two cameras under consideration, the A7S II offers substantially better image quality than the D40 (overall score 29 points higher). The advantage is based on 2.6 bits higher color depth, 2.3 EV in additional dynamic range, and 2.4 stops in additional low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

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Sensor Characteristics
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Nikon D40 APS-C 6.0 3008 2000none21.011.056156
2.
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
3.
 
Nikon D3400 APS-C 24.0 6000 40001080/60p24.813.9119286
4.
 
Nikon D3300 APS-C 24.0 6000 40001080/60p24.312.8138582
5.
 
Nikon D3100 APS-C 14.2 4608 30721080/24p22.511.391967
6.
 
Nikon D3000 APS-C 10.0 3872 2592none22.311.156362
7.
 
Nikon D60 APS-C 10.0 3872 2592none22.511.456265
8.
 
Nikon D40X APS-C 10.0 3872 2592none22.411.451663
9.
 
Nikon D80 APS-C 10.0 3872 2592none22.111.252461
10.
 
Nikon D50 APS-C 6.0 3008 2000none20.910.856055
11.
 
Nikon D70s APS-C 6.0 3008 2000none20.410.352950
12.
 
Nikon D70 APS-C 6.0 3008 2000none20.410.352950
13.
 
Sony A7 IV Full Frame 32.7 7008 46724K/60p25.414.7337997
14.
 
Sony A7S III Full Frame 12.0 4240 28324K/120p23.713.9252086
15.
 
Sony A7R IV Full Frame 60.2 9504 63364K/30p26.014.8334499
16.
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
17.
 
Sony A7S Full Frame 12.0 4240 28321080/60p23.913.2370287
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Many modern cameras are not only capable of taking still images, but can also record movies. The A7S II indeed provides for movie recording, while the D40 does not. The highest resolution format that the A7S II can use is 4K/30p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the A7S II has an electronic viewfinder (2400k dots), while the D40 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 A7S II offers a wider field of view (100%) than the one in the D40 (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the A7S II has a higher magnification (0.78x 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 D40, the Sony A7S II, and comparable cameras.

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Core Features
# image 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 D40optical n2.5 / 230 fixed n 1/4000s 2.5/s Y n
2.
 
Sony A7S II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
3.
 
Nikon D3400optical n3.0 / 921 fixed n 1/4000s 5.0/s Y n
4.
 
Nikon D3300optical n3.0 / 921 fixed n 1/4000s 5.0/s Y n
5.
 
Nikon D3100optical n3.0 / 230 fixed n 1/4000s 3.0/s Y n
6.
 
Nikon D3000optical n3.0 / 230 fixed n 1/4000s 3.0/s Y n
7.
 
Nikon D60optical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
8.
 
Nikon D40Xoptical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
9.
 
Nikon D80optical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
10.
 
Nikon D50optical n2.0 / 130 fixed n 1/4000s 2.5/s Y n
11.
 
Nikon D70soptical n2.0 / 130 fixed n 1/8000s 3.0/s Y n
12.
 
Nikon D70optical n1.8 / 130 fixed n 1/8000s 3.0/s Y n
13.
 
Sony A7 IV3686 n3.0 / 1037 swivel Y 1/8000s 10.0/s n Y
14.
 
Sony A7S III9440 n3.0 / 1440 swivel Y 1/8000s 10.0/s n Y
15.
 
Sony A7R IV5760 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
16.
 
Sony A7R II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
17.
 
Sony A7S2400 n3.0 / 921 tilting n 1/8000s 5.0/s n n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
padding

One difference between the cameras concerns the presence of an on-board flash. The D40 has one, while the A7S II does not. While the built-in flash of the D40 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 A7S II 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 D40 writes its imaging data to SDHC cards, while the A7S II uses SDXC or Memory Stick PRO Duo cards. The A7S II supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the D40 cannot take advantage of Ultra High Speed SD cards.

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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 D40 and Sony Alpha 7S II and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Nikon D40Y- / ----2.0---
2.
 
Sony A7S IIYstereo / monoYYmicro2.0YY-
3.
 
Nikon D3400Ymono / mono--mini2.0--Y
4.
 
Nikon D3300Ymono / monoY-mini2.0---
5.
 
Nikon D3100Ymono / mono--mini2.0---
6.
 
Nikon D3000Y- / ----2.0---
7.
 
Nikon D60Y- / ----2.0---
8.
 
Nikon D40XY- / ----2.0---
9.
 
Nikon D80Y- / ----2.0---
10.
 
Nikon D50Y- / ----2.0---
11.
 
Nikon D70sY- / ----2.0---
12.
 
Nikon D70Y- / ----1.0---
13.
 
Sony A7 IVYstereo / monoYYfull3.2Y-Y
14.
 
Sony A7S IIIYstereo / monoYYfull3.2Y-Y
15.
 
Sony A7R IVYstereo / monoYYmicro3.1YYY
16.
 
Sony A7R IIYstereo / monoYYmicro2.0YY-
17.
 
Sony A7SYstereo / monoYYmicro2.0YY-
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It is notable that the A7S II offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the D40 does not provide wifi capability.

Both the D40 and the A7S II have been discontinued, but can regularly be found used on ebay. The D40 was replaced by the Nikon D40X, while the A7S II was followed by the Sony A7S III. Further information on the features and operation of the D40 and A7S II can be found, respectively, in the Nikon D40 Manual (free pdf) or the online Sony A7S II Manual.

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Review summary

So what is the bottom line? Is there a clear favorite between the Nikon D40 and the Sony A7S II? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

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Reasons to prefer the Nikon D40:

  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Less heavy: Is lighter (by 105g or 17 percent) and hence easier to carry around.
  • Longer lasting: Can take more shots (470 versus 370) 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 (83 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in November 2006).

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Arguments in favor of the Sony Alpha 7S II:

  • More detail: Has more megapixels (12 vs 6MP), which boosts linear resolution by 41%.
  • Better image quality: Scores substantially higher (29 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (2.6 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (2.3 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (2.4 stops ISO advantage).
  • 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 (0.78x 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 (1229k vs 230k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (5 vs 2.5 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • 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.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
  • More modern: Reflects 8 years and 9 months of technical progress since the D40 launch.

If the count of individual advantages (bullet points above) is taken as a guide, the A7S II is the clear winner of the contest (23 : 6 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.

D40 06:23 A7S II

How about other alternatives? Do the specifications of the Nikon D40 and the Sony A7S II 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 says little about, for example, the shooting experience and imaging performance of the D40 and the A7S II in practical situations. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.

Expert reviews

This is where reviews by experts come in. The table below provides a synthesis of the camera assessments of some of the best known photo-gear 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.

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Expert Camera Reviews
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Nikon D40..81/100..+ +o4.5/5 Nov 2006 499ebay.com
2.
 
Sony A7S II5/5+....4.5/55/5 Sep 2015 2,999ebay.com
3.
 
Nikon D34004/5+4/576/1004/54.5/5 Aug 2016 499ebay.com
4.
 
Nikon D33003/5+..77/1004.5/54.5/5 Jan 2014 499ebay.com
5.
 
Nikon D31005/5+ +..72/1004.5/54.5/5 Aug 2010 599ebay.com
6.
 
Nikon D3000..+..72/1004/54.5/5 Jul 2009 599ebay.com
7.
 
Nikon D60..80/100..+ +4/54.5/5 Jan 2008 629ebay.com
8.
 
Nikon D40X..79/100..+ +4/54/5 Mar 2007 729ebay.com
9.
 
Nikon D80..+..+ +o4.5/5 Aug 2006 999ebay.com
10.
 
Nikon D50..78/100..+ +4/54.5/5 Apr 2005 749ebay.com
11.
 
Nikon D70s..........5/5 Apr 2005 899ebay.com
12.
 
Nikon D70......+ +.... Jan 2004 999ebay.com
13.
 
Sony A7 IV5/5+ +4.5/589/1004.5/54.5/5 Oct 2021 2,499 amazon.com
14.
 
Sony A7S III4.5/5+ +5/591/1004.5/55/5 Jul 2020 3,499 amazon.com
15.
 
Sony A7R IV5/5+4.5/591/1004.5/55/5 Jul 2019 3,499ebay.com
16.
 
Sony A7R II5/5+ +5/590/1005/55/5 Jun 2015 3,199ebay.com
17.
 
Sony A7S4/5....86/1004.5/55/5 Apr 2014 2,499ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Nikon D40 vs Sony A7S II

    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 Specifications
    Camera Model Nikon D40 Sony A7S II
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Nikon F mount lenses Sony E mount lenses
    Launch Date November 2006 September 2015
    Launch Price USD 499 USD 2,999
    Sensor Specs Nikon D40 Sony A7S II
    Sensor Technology CCD CMOS
    Sensor Format APS-C Sensor Full Frame Sensor
    Sensor Size 23.7 x 15.6 mm 35.6 x 23.8 mm
    Sensor Area 369.72 mm2 847.28 mm2
    Sensor Diagonal 28.4 mm 42.8 mm
    Crop Factor 1.5x 1.0x
    Sensor Resolution 6 Megapixels 12 Megapixels
    Image Resolution 3008 x 2000 pixels 4240 x 2832 pixels
    Pixel Pitch 7.85 μm 8.40 μm
    Pixel Density 1.63 MP/cm2 1.42 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability no Video 4K/30p Video
    ISO Setting 200 - 1,600 ISO 100 - 102,400 ISO
    ISO Boost 200 - 3,200 ISO 50 - 409,600 ISO
    DXO Sensor Quality (score) 56 85
    DXO Color Depth (bits) 21.0 23.6
    DXO Dynamic Range (EV) 11.0 13.3
    DXO Low Light (ISO) 561 2993
    Screen Specs Nikon D40 Sony A7S II
    Viewfinder Type Optical viewfinder Electronic viewfinder
    Viewfinder Field of View 95% 100%
    Viewfinder Magnification 0.53x 0.78x
    Viewfinder Resolution 2400k dots
    LCD Framing Live View
    Rear LCD Size 2.5inch 3.0inch
    LCD Resolution 230k dots 1229k dots
    LCD Attachment Fixed screen Tilting screen
    Shooting Specs Nikon D40 Sony A7S II
    Focus System Phase-detect AF Contrast-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/8000s
    Continuous Shooting 2.5 shutter flaps/s 5 shutter flaps/s
    Shutter Life Expectancy50 000 actuations200 000 actuations
    Electronic Shutterno E-ShutterYES
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium SDHC cards MS or SDXC cards
    Single or Dual Card Slots Single card slot Single card slot
    UHS card support no UHS-I
    Connectivity Specs Nikon D40 Sony A7S II
    External Flash Hotshoe Hotshoe
    USB Connector USB 2.0 USB 2.0
    HDMI Port no HDMI micro HDMI
    Microphone Port no MIC socket External MIC port
    Headphone Socket no Headphone port Headphone port
    Wifi Support no Wifi Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Body Specs Nikon D40 Sony A7S II
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Nikon EN-EL9 Sony NP-FW50
    Battery Life (CIPA)470 shots per charge370 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 124 x 94 x 64 mm
    (4.9 x 3.7 x 2.5 in)
    127 x 96 x 60 mm
    (5.0 x 3.8 x 2.4 in)
    Camera Weight 522 g (18.4 oz) 627 g (22.1 oz)
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    Check D40 offers at
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    Check A7S II offers at
    ebay.com

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