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Nikon D40 vs Sony A99 II

The Nikon D40 and the Sony Alpha ALT-A99 II are two digital cameras that were revealed to the public, respectively, in November 2006 and September 2016. Both are DSLR (Digital Single Lens Reflex) cameras that are based on an APS-C (D40) and a full frame (A99 II) sensor. The Nikon has a resolution of 6 megapixels, whereas the Sony provides 42.2 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 A99 II
Nikon D40   Sony A99 II
Digital single lens reflex Digital single lens reflex
Nikon F mount lenses Sony A mount lenses
6 MP – APS-C sensor 42.2 MP – Full Frame sensor
no Video 4K/30p Video
ISO 200-1,600 (200 - 3,200) ISO 100-25,600
Optical viewfinder Electronic viewfinder (2400k dots)
2.5" LCD – 230k dots 3.0" LCD – 1229k dots
Fixed screen (not touch-sensitive) Fully flexible screen (no touchscreen)
2.5 shutter flaps per second 12 shutter flaps per second
Lens stabilization onlyIn-body stabilization
not weather sealedWeathersealed body
470 shots per battery charge490 shots per battery charge
124 x 94 x 64 mm, 522 g 143 x 104 x 76 mm, 849 g
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Check D40 offers at
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Check A99 II offers at
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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 ALT-A99 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

An illustration of the physical size and weight of the Nikon D40 and the Sony A99 II is provided 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 A99 II
Compare D40 versus A99 II top
Comparison D40 or A99 II rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A99 II is notably larger (28 percent) than the Nikon D40. Moreover, the A99 II is substantially heavier (63 percent) than the D40. It is noteworthy in this context that the A99 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. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

Concerning battery life, the D40 gets 470 shots out of its Nikon EN-EL9 battery, while the A99 II can take 490 images on a single charge of its Sony NP-FM500H power pack.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

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Body Specifications
  empty Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price
Street
Price
1.
 
Nikon D40 124 mm 94 mm 64 mm 522 g 470 n Nov 2006 EUR 499ebay.com
2.
 
Sony A99 II 143 mm 104 mm 76 mm 849 g 490 Y Sep 2016 EUR 3 599ebay.com
3.
 
Nikon D40X 124 mm 94 mm 64 mm 522 g 520 n Mar 2007 EUR 699ebay.com
4.
 
Nikon D50 133 mm 102 mm 76 mm 620 g 400 n Apr 2005 EUR 749ebay.com
5.
 
Nikon D70s 140 mm 111 mm 78 mm 679 g 500 n Apr 2005 EUR 949ebay.com
6.
 
Nikon D80 132 mm 103 mm 77 mm 668 g 600 n Aug 2006 EUR 969ebay.com
7.
 
Nikon D3000 126 mm 97 mm 64 mm 536 g 500 n Jul 2009 EUR 539ebay.com
8.
 
Nikon D3100 124 mm 96 mm 75 mm 505 g 550 n Aug 2010 EUR 549ebay.com
9.
 
Nikon D3200 125 mm 96 mm 77 mm 505 g 540 n Apr 2012 EUR 599ebay.com
10.
 
Nikon D3300 124 mm 98 mm 76 mm 430 g 700 n Jan 2014 EUR 499ebay.com
11.
 
Nikon D3400 124 mm 98 mm 76 mm 445 g 1200 n Aug 2016 EUR 499ebay.com
12.
 
Panasonic L10 135 mm 96 mm 78 mm 556 g 450 n Aug 2007 EUR 599ebay.com
13.
 
Sony A7R II 127 mm 96 mm 60 mm 625 g 290 Y Jun 2015 EUR 3 499ebay.com
14.
 
Sony A7R III 127 mm 96 mm 74 mm 650 g 650 Y Oct 2017 EUR 3 499ebay.com
15.
 
Sony A7R IIIA 127 mm 96 mm 74 mm 650 g 650 Y Apr 2021 EUR 3 499 amazon.com
16.
 
Sony A99 147 mm 111 mm 78 mm 812 g 500 Y Sep 2012 EUR 2 799ebay.com
17.
 
Sony A900 156 mm 117 mm 82 mm 895 g 880 Y Sep 2008 EUR 2 799ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.

Any camera decision will naturally be influenced heavily by the price. 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 84 percent) than the A99 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

Sensor comparison

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the 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 D40 features an APS-C sensor and the Sony A99 II a full frame sensor. The sensor area in the A99 II is 133 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 A99 II sensor measures

With 42.2MP, the A99 II offers a higher resolution than the D40 (6MP), but the A99 II has smaller individual pixels (pixel pitch of 4.52μm versus 7.85μm for the D40). Yet, the A99 II is a much more recent model (by 9 years and 10 months) than the D40, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the A99 II has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Sony A99 II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A99 II for good quality output (200 dots per inch) amounts to 39.8 x 26.5 inches or 101 x 67.4 cm, for very good quality (250 dpi) 31.8 x 21.2 inches or 80.8 x 53.9 cm, and for excellent quality (300 dpi) 26.5 x 17.7 inches or 67.3 x 44.9 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 A99 II has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

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 ALT-A99 II are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-25600.

In terms of underlying technology, the D40 is build around a CCD sensor, while the A99 II uses a BSI-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 A99 II MP

For many cameras, data on sensor performance has been reported by DXO Mark. 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 A99 II offers substantially better image quality than the D40 (overall score 36 points higher). The advantage is based on 4.4 bits higher color depth, 2.4 EV in additional dynamic range, and 2 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
  empty 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 A99 II Full Frame 42.2 7952 53044K/30p25.413.4231792
3.
 
Nikon D40X APS-C 10.0 3872 2592none22.411.451663
4.
 
Nikon D50 APS-C 6.0 3008 2000none20.910.856055
5.
 
Nikon D70s APS-C 6.0 3008 2000none20.410.352950
6.
 
Nikon D80 APS-C 10.0 3872 2592none22.111.252461
7.
 
Nikon D3000 APS-C 10.0 3872 2592none22.311.156362
8.
 
Nikon D3100 APS-C 14.2 4608 30721080/24p22.511.391967
9.
 
Nikon D3200 APS-C 24.1 6016 40001080/30p24.113.2113181
10.
 
Nikon D3300 APS-C 24.0 6000 40001080/60p24.312.8138582
11.
 
Nikon D3400 APS-C 24.0 6000 40001080/60p24.813.9119286
12.
 
Panasonic L10 Four Thirds 10.0 3648 2736none21.310.842955
13.
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
14.
 
Sony A7R III Full Frame 42.2 7952 53044K/30p26.014.73523100
15.
 
Sony A7R IIIA Full Frame 42.2 7952 53044K/30p26.014.73523100
16.
 
Sony A99 Full Frame 24.0 6000 40001080/60p25.014.0155589
17.
 
Sony A900 Full Frame 24.4 6048 4032none23.712.3143179

Many modern cameras are not only capable of taking still images, but also of capturing video footage. The A99 II indeed provides for movie recording, while the D40 does not. The highest resolution format that the A99 II can use is 4K/30p.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the A99 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 A99 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 A99 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 A99 II, and comparable cameras.

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Core Features
  empty 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 A99 II2400 Y3.0 / 1229 full-flex n 1/8000s 12.0/s n Y
3.
 
Nikon D40Xoptical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
4.
 
Nikon D50optical n2.0 / 130 fixed n 1/4000s 2.5/s Y n
5.
 
Nikon D70soptical n2.0 / 130 fixed n 1/8000s 3.0/s Y n
6.
 
Nikon D80optical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
7.
 
Nikon D3000optical n3.0 / 230 fixed n 1/4000s 3.0/s Y n
8.
 
Nikon D3100optical n3.0 / 230 fixed n 1/4000s 3.0/s Y n
9.
 
Nikon D3200optical n3.0 / 921 fixed n 1/4000s 4.0/s Y n
10.
 
Nikon D3300optical n3.0 / 921 fixed n 1/4000s 5.0/s Y n
11.
 
Nikon D3400optical n3.0 / 921 fixed n 1/4000s 5.0/s Y n
12.
 
Panasonic L10optical n2.5 / 207 swivel n 1/4000s 3.0/s Y n
13.
 
Sony A7R II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
14.
 
Sony A7R III3686 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
15.
 
Sony A7R IIIA3686 n3.0 / 2340 tilting Y 1/8000s 10.0/s n Y
16.
 
Sony A992359 Y3.0 / 1229 full-flex n 1/8000s 6.0/s n Y
17.
 
Sony A900optical Y3.0 / 922 fixed n 1/8000s 5.0/s n Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One difference between the cameras concerns the presence of an on-board flash. The D40 has one, while the A99 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 A99 II 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 D40 does not have a selfie-screen.

The D40 writes its imaging data to SDHC cards, while the A99 II uses SDXC or Memory Stick PRO Duo cards. The A99 II features dual card slots, which can be very useful in case a memory card fails. In contrast, the D40 only has one slot. The A99 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 ALT-A99 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
  empty 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 A99 IIYstereo / monoYYmicro2.0YYY
3.
 
Nikon D40XY- / ----2.0---
4.
 
Nikon D50Y- / ----2.0---
5.
 
Nikon D70sY- / ----2.0---
6.
 
Nikon D80Y- / ----2.0---
7.
 
Nikon D3000Y- / ----2.0---
8.
 
Nikon D3100Ymono / mono--mini2.0---
9.
 
Nikon D3200Ymono / monoY-mini2.0---
10.
 
Nikon D3300Ymono / monoY-mini2.0---
11.
 
Nikon D3400Ymono / mono--mini2.0--Y
12.
 
Panasonic L10Y- / ----2.0---
13.
 
Sony A7R IIYstereo / monoYYmicro2.0YY-
14.
 
Sony A7R IIIYstereo / monoYYmicro3.1YYY
15.
 
Sony A7R IIIAYstereo / monoYYmicro3.2YYY
16.
 
Sony A99Ystereo / monoYYmini2.0---
17.
 
Sony A900Y- / ---mini2.0---

It is notable that the A99 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.

Studio photographers will appreciate that the Sony A99 II (unlike the D40) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the D40 and the A99 II have been discontinued, but can regularly be found used on ebay. The D40 was replaced by the Nikon D40X, while the A99 II does not have a direct successor. Further information on the features and operation of the D40 and A99 II can be found, respectively, in the Nikon D40 Manual (free pdf) or the online Sony A99 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 A99 II? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

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Arguments in favor of the Nikon D40:

  • 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.
  • More compact: Is smaller (124x94mm vs 143x104mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 327g or 39 percent) and hence easier to carry around.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More affordable: Was introduced into a lower priced category (84 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in November 2006).

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Reasons to prefer the Sony Alpha ALT-A99 II:

  • More detail: Has more megapixels (42.2 vs 6MP), which boosts linear resolution by 165%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores substantially higher (36 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (4.4 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (2.4 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (2 stops ISO advantage).
  • 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 (0.78x vs 0.53x).
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • 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 full-flex screen for odd-angle shots in portrait or landscape orientation.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (12 vs 2.5 flaps/sec) to capture the decisive moment.
  • 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.
  • 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.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
  • More modern: Reflects 9 years and 10 months of technical progress since the D40 launch.

If the number of relative strengths (bullet points above) is taken as a guide, the A99 II is the clear winner of the contest (27 : 7 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision on a new camera. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

D40 07:27 A99 II

How about other alternatives? Do the specifications of the Nikon D40 and the Sony A99 II place the cameras among the top in their class? Find out in the latest Best DSLR Camera listing 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 D40 or the A99 II. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.

Expert reviews

This is 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.

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Expert Camera Reviews
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price
Street
Price
1.
 
Nikon D40..81/100..+ +o4.5/5 Nov 2006 EUR 499ebay.com
2.
 
Sony A99 II....4.5/585/1004.5/54.5/5 Sep 2016 EUR 3 599ebay.com
3.
 
Nikon D40X..79/100..+ +4/54/5 Mar 2007 EUR 699ebay.com
4.
 
Nikon D50..78/100..+ +4/54.5/5 Apr 2005 EUR 749ebay.com
5.
 
Nikon D70s..........5/5 Apr 2005 EUR 949ebay.com
6.
 
Nikon D80..+..+ +o4.5/5 Aug 2006 EUR 969ebay.com
7.
 
Nikon D3000..+..72/1004/54.5/5 Jul 2009 EUR 539ebay.com
8.
 
Nikon D31005/5+ +..72/1004.5/54.5/5 Aug 2010 EUR 549ebay.com
9.
 
Nikon D32005/5+ +..73/1004.5/54.5/5 Apr 2012 EUR 599ebay.com
10.
 
Nikon D33003/5+..77/1004.5/54.5/5 Jan 2014 EUR 499ebay.com
11.
 
Nikon D34004/5+4/576/1004/54.5/5 Aug 2016 EUR 499ebay.com
12.
 
Panasonic L10..85/100..+3.5/54/5 Aug 2007 EUR 599ebay.com
13.
 
Sony A7R II5/5+ +5/590/1005/55/5 Jun 2015 EUR 3 499ebay.com
14.
 
Sony A7R III..+ +4/590/1004.5/55/5 Oct 2017 EUR 3 499ebay.com
15.
 
Sony A7R IIIA..+ +4/590/1004.5/55/5 Apr 2021 EUR 3 499 amazon.com
16.
 
Sony A995/5....84/1004.5/54.5/5 Sep 2012 EUR 2 799ebay.com
17.
 
Sony A900..+ +..+ +4.5/55/5 Sep 2008 EUR 2 799ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, though. The assessments were made in relation to similar cameras of the same technological generation. Hence, a score should always be seen in the context of the camera's market launch date and its price, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

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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 make a corresponding selection in the search boxes below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Nikon D40 vs Sony A99 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 A99 II
    Camera Type Digital single lens reflex Digital single lens reflex
    Camera Lens Nikon F mount lenses Sony A mount lenses
    Launch Date November 2006 September 2016
    Launch Price USD 499 USD 3,199
    Sensor Specs Nikon D40 Sony A99 II
    Sensor Technology CCD BSI-CMOS
    Sensor Format APS-C Sensor Full Frame Sensor
    Sensor Size 23.7 x 15.6 mm 35.9 x 24.0 mm
    Sensor Area 369.72 mm2 861.6 mm2
    Sensor Diagonal 28.4 mm 43.2 mm
    Crop Factor 1.5x 1.0x
    Sensor Resolution 6 Megapixels 42.2 Megapixels
    Image Resolution 3008 x 2000 pixels 7952 x 5304 pixels
    Pixel Pitch 7.85 μm 4.52 μm
    Pixel Density 1.63 MP/cm2 4.90 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability no Video 4K/30p Video
    ISO Setting 200 - 1,600 ISO 100 - 25,600 ISO
    ISO Boost 200 - 3,200 ISO 50 - 25,600 ISO
    DXO Sensor Quality (score) 56 92
    DXO Color Depth (bits) 21.0 25.4
    DXO Dynamic Range (EV) 11.0 13.4
    DXO Low Light (ISO) 561 2317
    Screen Specs Nikon D40 Sony A99 II
    Viewfinder Type Optical viewfinder Electronic viewfinder
    Viewfinder Field of View 95% 100%
    Viewfinder Magnification 0.53x 0.78x
    Viewfinder Resolution 2400k dots
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View
    Rear LCD Size 2.5inch 3.0inch
    LCD Resolution 230k dots 1229k dots
    LCD Attachment Fixed screen Fully flexible screen
    Shooting Specs Nikon D40 Sony A99 II
    Focus System Phase-detect AF Phase-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/8000s
    Continuous Shooting 2.5 shutter flaps/s 12 shutter flaps/s
    Shutter Life Expectancy50 000 actuations300 000 actuations
    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 Dual card slots
    UHS card support no UHS-I
    Connectivity Specs Nikon D40 Sony A99 II
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 2.0
    HDMI Port no HDMI micro HDMI
    Microphone Port no MIC socket External MIC port
    Headphone Socket no Headphone port Headphone 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 D40 Sony A99 II
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Nikon EN-EL9 Sony NP-FM500H
    Battery Life (CIPA)470 shots per charge490 shots per charge
    Body Dimensions 124 x 94 x 64 mm
    (4.9 x 3.7 x 2.5 in)
    143 x 104 x 76 mm
    (5.6 x 4.1 x 3.0 in)
    Camera Weight 522 g (18.4 oz) 849 g (29.9 oz)
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    Check D40 offers at
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    Check A99 II offers at
    ebay.com

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