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Sony A99 vs Nikon D40

The Sony Alpha SLT-A99 and the Nikon D40 are two digital cameras that were officially introduced, respectively, in September 2012 and November 2006. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a full frame (A99) and an APS-C (D40) sensor. The Sony has a resolution of 24 megapixels, whereas the Nikon provides 6 MP.

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

Headline Specifications
Sony A99
versus
Nikon D40
Sony A99   Nikon D40
Digital single lens reflex Digital single lens reflex
Sony A mount lenses Nikon F mount lenses
24 MP – Full Frame sensor 6 MP – APS-C sensor
1080/60p Video no Video
ISO 100-25,600 ISO 200-1,600 (200 - 3,200)
Electronic viewfinder (2359k dots) Optical viewfinder
3.0" LCD – 1229k dots 2.5" LCD – 230k dots
Fully flexible screen (no touchscreen) Fixed screen (not touch-sensitive)
6 shutter flaps per second 2.5 shutter flaps per second
In-body stabilizationLens stabilization only
Weathersealed bodynot weather sealed
500 shots per battery charge470 shots per battery charge
147 x 111 x 78 mm, 812 g 124 x 94 x 64 mm, 522 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Sony Alpha SLT-A99 and the Nikon D40? 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 Sony A99 and the Nikon D40 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 Sony A99 vs Nikon D40
Compare A99 versus D40 top
Comparison A99 or D40 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Nikon D40 is notably smaller (29 percent) than the Sony A99. Moreover, the D40 is substantially lighter (36 percent) than the A99. It is worth mentioning in this context that the A99 is splash and dust resistant, 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 A99 gets 500 shots out of its Sony NP-FM500H battery, while the D40 can take 470 images on a single charge of its Nikon EN-EL9 power pack.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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.
 
Sony A99 147 mm 111 mm 78 mm 812 g 500 Y Sep 2012 2,799ebay.com
2.
 
Nikon D40 124 mm 94 mm 64 mm 522 g 470 n Nov 2006 499ebay.com
3.
 
Canon R6 138 mm 98 mm 88 mm 680 g 360 Y Jul 2020 2,499 amazon.com
4.
 
Nikon D3400 124 mm 98 mm 76 mm 445 g 1200 n Aug 2016 499ebay.com
5.
 
Nikon D3300 124 mm 98 mm 76 mm 430 g 700 n Jan 2014 499ebay.com
6.
 
Nikon D3100 124 mm 96 mm 75 mm 505 g 550 n Aug 2010 599ebay.com
7.
 
Nikon D40X 124 mm 94 mm 64 mm 522 g 520 n Mar 2007 729ebay.com
8.
 
Nikon D50 133 mm 102 mm 76 mm 620 g 400 n Apr 2005 749ebay.com
9.
 
Sony A9 II 129 mm 96 mm 76 mm 678 g 690 Y Oct 2019 4,499 amazon.com
10.
 
Sony A7R III 127 mm 96 mm 74 mm 650 g 650 Y Oct 2017 3,199ebay.com
11.
 
Sony A9 127 mm 96 mm 63 mm 673 g 650 Y Apr 2017 4,499ebay.com
12.
 
Sony A99 II 143 mm 104 mm 76 mm 849 g 490 Y Sep 2016 3,199ebay.com
13.
 
Sony A7R II 127 mm 96 mm 60 mm 625 g 290 Y Jun 2015 3,199ebay.com
14.
 
Sony A7S II 127 mm 96 mm 60 mm 627 g 370 Y Sep 2015 2,999ebay.com
15.
 
Sony A77 143 mm 104 mm 81 mm 732 g 470 Y Aug 2011 1,399ebay.com
16.
 
Sony A850 156 mm 117 mm 82 mm 895 g 880 Y Aug 2009 1,999ebay.com
17.
 
Sony A900 156 mm 117 mm 82 mm 895 g 880 Y Sep 2008 2,999ebay.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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The D40 was launched at a markedly lower price (by 82 percent) than the A99, 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 size of the imaging sensor is a crucial determinant 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 Sony A99 features a full frame sensor and the Nikon D40 an APS-C sensor. The sensor area in the D40 is 57 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Sony A99 and Nikon D40 sensor measures

With 24MP, the A99 offers a higher resolution than the D40 (6MP), but the A99 has smaller individual pixels (pixel pitch of 5.96μm versus 7.85μm for the D40). However, the A99 is a much more recent model (by 5 years and 9 months) than the D40, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixels.

The resolution advantage of the Sony A99 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A99 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 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 Sony Alpha SLT-A99 has a native sensitivity range from ISO 100 to ISO 25600, which can be extended to ISO 50-25600. The corresponding ISO settings for the Nikon D40 are ISO 200 to ISO 1600, with the possibility to increase the ISO range to 200-3200.

In terms of underlying technology, the A99 is build around a CMOS sensor, while the D40 uses a CCD 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.

A99 versus D40 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 review, the A99 provides substantially higher image quality than the D40, with an overall score that is 33 points higher. This advantage is based on 4 bits higher color depth, 3 EV in additional dynamic range, and 1.5 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.
 
Sony A99 Full Frame 24.0 6000 40001080/60p25.014.0155589
2.
 
Nikon D40 APS-C 6.0 3008 2000none21.011.056156
3.
 
Canon R6 Full Frame 20.0 5472 36484k/60p24.214.3339490
4.
 
Nikon D3400 APS-C 24.0 6000 40001080/60p24.813.9119286
5.
 
Nikon D3300 APS-C 24.0 6000 40001080/60p24.312.8138582
6.
 
Nikon D3100 APS-C 14.2 4608 30721080/24p22.511.391967
7.
 
Nikon D40X APS-C 10.0 3872 2592none22.411.451663
8.
 
Nikon D50 APS-C 6.0 3008 2000none20.910.856055
9.
 
Sony A9 II Full Frame 24.0 6000 40004K/30p25.014.0343493
10.
 
Sony A7R III Full Frame 42.2 7952 53044K/30p26.014.73523100
11.
 
Sony A9 Full Frame 24.0 6000 40004K/30p24.913.3351792
12.
 
Sony A99 II Full Frame 42.2 7952 53044K/30p25.413.4231792
13.
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
14.
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
15.
 
Sony A77 APS-C 24.0 6000 40001080/60p24.013.280178
16.
 
Sony A850 Full Frame 24.4 6048 4032none23.812.2141579
17.
 
Sony A900 Full Frame 24.4 6048 4032none23.712.3143179
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Many modern cameras are not only capable of taking still images, but can also record movies. The A99 indeed provides movie recording capabilities, while the D40 does not. The highest resolution format that the A99 can use is 1080/60p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the A99 has an electronic viewfinder (2359k 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 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 has a higher magnification (0.71x 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 Sony A99 and Nikon D40 along with similar information for a selection of comparators.

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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.
 
Sony A992359 Y3.0 / 1229 full-flex n 1/8000s 6.0/s n Y
2.
 
Nikon D40optical n2.5 / 230 fixed n 1/4000s 2.5/s Y n
3.
 
Canon R63690 n3.0 / 1620 swivel Y 1/8000s 12.0/s n Y
4.
 
Nikon D3400optical n3.0 / 921 fixed n 1/4000s 5.0/s Y n
5.
 
Nikon D3300optical n3.0 / 921 fixed n 1/4000s 5.0/s Y n
6.
 
Nikon D3100optical n3.0 / 230 fixed n 1/4000s 3.0/s Y n
7.
 
Nikon D40Xoptical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
8.
 
Nikon D50optical n2.0 / 130 fixed n 1/4000s 2.5/s Y n
9.
 
Sony A9 II3686 n3.0 / 1440 tilting Y 1/8000s 20.0/s n Y
10.
 
Sony A7R III3686 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
11.
 
Sony A93686 n3.0 / 1440 tilting Y 1/8000s 20.0/s n Y
12.
 
Sony A99 II2400 Y3.0 / 1229 full-flex n 1/8000s 12.0/s n Y
13.
 
Sony A7R II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
14.
 
Sony A7S II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
15.
 
Sony A772359 Y3.0 / 921 full-flex n 1/8000s 12.0/s Y Y
16.
 
Sony A850optical Y3.0 / 922 fixed n 1/8000s 3.0/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.
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One feature that is present on the A99, but is missing on the D40 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 A99 has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the D40 does not have a selfie-screen.

The A99 writes its imaging data to SDXC or Memory Stick PRO Duo cards, while the D40 uses SDHC cards. The A99 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 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 Sony Alpha SLT-A99 and Nikon D40 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.
 
Sony A99Ystereo / monoYYmini2.0---
2.
 
Nikon D40Y- / ----2.0---
3.
 
Canon R6Ymono / monoYYmicro3.2Y-Y
4.
 
Nikon D3400Ymono / mono--mini2.0--Y
5.
 
Nikon D3300Ymono / monoY-mini2.0---
6.
 
Nikon D3100Ymono / mono--mini2.0---
7.
 
Nikon D40XY- / ----2.0---
8.
 
Nikon D50Y- / ----2.0---
9.
 
Sony A9 IIYstereo / monoYYmicro3.1YYY
10.
 
Sony A7R IIIYstereo / monoYYmicro3.1YYY
11.
 
Sony A9Ystereo / monoYYmicro2.0YYY
12.
 
Sony A99 IIYstereo / monoYYmicro2.0YYY
13.
 
Sony A7R IIYstereo / monoYYmicro2.0YY-
14.
 
Sony A7S IIYstereo / monoYYmicro2.0YY-
15.
 
Sony A77Ystereo / monoY-mini2.0---
16.
 
Sony A850Y- / ---mini2.0---
17.
 
Sony A900Y- / ---mini2.0---
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Studio photographers will appreciate that the Sony A99 (unlike the D40) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Travel and landscape photographers will find it useful that the A99 has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.

Both the A99 and the D40 have been discontinued, but can regularly be found used on ebay. The D40 was replaced by the Nikon D40X, while the A99 was followed by the Sony A99. Further information on the features and operation of the A99 and D40 can be found, respectively, in the Sony A99 Manual (free pdf) or the online Nikon D40 Manual.

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Review summary

So what is the bottom line? Is the Sony A99 better than the Nikon D40 or vice versa? Below is a summary of the relative strengths of each of the two contestants.

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Arguments in favor of the Sony Alpha SLT-A99:

  • More detail: Offers more megapixels (24 vs 6MP) with a 100% higher linear resolution.
  • Better image quality: Scores substantially higher (33 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (4 bits more color depth).
  • More dynamic range: Captures a larger spectrum of light and dark details (3 EV of extra DR).
  • Better low-light sensitivity: Requires less light for good images (1.5 stops ISO advantage).
  • Broader imaging potential: Can record not only still images but also 1080/60p movies.
  • 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 (0.71x vs 0.53x).
  • Easier setting verification: Features an LCD display on top to control 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 (6 vs 2.5 flaps/sec) to capture the decisive moment.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • Sharper images: Has hand-shake reducing image stabilization built-in.
  • Easier geotagging: Features an internal GPS sensor to log localization data.
  • 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 5 years and 9 months of technical progress since the D40 launch.

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Advantages of the Nikon D40:

  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • More compact: Is smaller (124x94mm vs 147x111mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 290g or 36 percent) and is thus easier to take along.
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • More affordable: Was introduced into a lower priced category (82 percent cheaper at launch).
  • More heavily discounted: Has been around for much longer (launched in November 2006).

If the number of relative strengths (bullet points above) is taken as a guide, the A99 is the clear winner of the match-up (23 : 6 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 wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

A99 23:06 D40

How about other alternatives? Do the specifications of the Sony A99 and the Nikon D40 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 A99 or the D40. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is why hands-on reviews by experts are important. 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.
 
Sony A995/5....84/1004.5/54.5/5 Sep 2012 2,799ebay.com
2.
 
Nikon D40..81/100..+ +o4.5/5 Nov 2006 499ebay.com
3.
 
Canon R65/5+ +4/590/1004.5/55/5 Jul 2020 2,499 amazon.com
4.
 
Nikon D34004/5+4/576/1004/54.5/5 Aug 2016 499ebay.com
5.
 
Nikon D33003/5+..77/1004.5/54.5/5 Jan 2014 499ebay.com
6.
 
Nikon D31005/5+ +..72/1004.5/54.5/5 Aug 2010 599ebay.com
7.
 
Nikon D40X..79/100..+ +4/54/5 Mar 2007 729ebay.com
8.
 
Nikon D50..78/100..+ +4/54.5/5 Apr 2005 749ebay.com
9.
 
Sony A9 II....5/590/1005/55/5 Oct 2019 4,499 amazon.com
10.
 
Sony A7R III..+ +4/590/1004.5/55/5 Oct 2017 3,199ebay.com
11.
 
Sony A95/5+ +4.8/589/1005/55/5 Apr 2017 4,499ebay.com
12.
 
Sony A99 II....4.5/585/1004.5/54.5/5 Sep 2016 3,199ebay.com
13.
 
Sony A7R II5/5+ +5/590/1005/55/5 Jun 2015 3,199ebay.com
14.
 
Sony A7S II5/5+....4.5/55/5 Sep 2015 2,999ebay.com
15.
 
Sony A775/591/100..81/100..5/5 Aug 2011 1,399ebay.com
16.
 
Sony A8503/5....75/100..4.5/5 Aug 2009 1,999ebay.com
17.
 
Sony A900..+ +..+ +4.5/55/5 Sep 2008 2,999ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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The above review scores should be interpreted with care, 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 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.

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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. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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    Specifications: Sony A99 vs Nikon D40

    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 Sony A99 Nikon D40
    Camera Type Digital single lens reflex Digital single lens reflex
    Camera Lens Sony A mount lenses Nikon F mount lenses
    Launch Date September 2012 November 2006
    Launch Price USD 2,799 USD 499
    Sensor Specs Sony A99 Nikon D40
    Sensor Technology CMOS CCD
    Sensor Format Full Frame Sensor APS-C Sensor
    Sensor Size 35.8 x 23.8 mm 23.7 x 15.6 mm
    Sensor Area 852.04 mm2 369.72 mm2
    Sensor Diagonal 43 mm 28.4 mm
    Crop Factor 1.0x 1.5x
    Sensor Resolution 24 Megapixels 6 Megapixels
    Image Resolution 6000 x 4000 pixels 3008 x 2000 pixels
    Pixel Pitch 5.96 μm 7.85 μm
    Pixel Density 2.82 MP/cm2 1.63 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 1080/60p Video no Video
    ISO Setting 100 - 25,600 ISO 200 - 1,600 ISO
    ISO Boost 50 - 25,600 ISO 200 - 3,200 ISO
    DXO Sensor Quality (score) 89 56
    DXO Color Depth (bits) 25.0 21.0
    DXO Dynamic Range (EV) 14.0 11.0
    DXO Low Light (ISO) 1555 561
    Screen Specs Sony A99 Nikon D40
    Viewfinder Type Electronic viewfinder Optical viewfinder
    Viewfinder Field of View 100% 95%
    Viewfinder Magnification 0.71x 0.53x
    Viewfinder Resolution 2359k dots
    Top-Level Screen Control Panel no Top Display
    LCD Framing Live View
    Rear LCD Size 3.0inch 2.5inch
    LCD Resolution 1229k dots 230k dots
    LCD Attachment Fully flexible screen Fixed screen
    Shooting Specs Sony A99 Nikon D40
    Focus System Phase-detect AF Phase-detect AF
    Manual Focusing AidFocus Peakingno Peaking Feature
    Continuous Shooting 6 shutter flaps/s 2.5 shutter flaps/s
    Shutter Life Expectancy200 000 actuations50 000 actuations
    Image StabilizationIn-body stabilizationLens stabilization only
    Fill Flash no On-Board Flash Built-in Flash
    Storage Medium MS or SDXC cards SDHC cards
    Single or Dual Card Slots Dual card slots Single card slot
    UHS card support UHS-I no
    Connectivity Specs Sony A99 Nikon D40
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 2.0 USB 2.0
    HDMI Port mini HDMI no HDMI
    Microphone Port External MIC port no MIC socket
    Headphone Socket Headphone port no Headphone port
    Wifi Support no Wifi no Wifi
    Geotagging GPS built-in no internal GPS
    Body Specs Sony A99 Nikon D40
    Environmental SealingWeathersealed bodynot weather sealed
    Battery Type Sony NP-FM500H Nikon EN-EL9
    Battery Life (CIPA)500 shots per charge470 shots per charge
    Body Dimensions 147 x 111 x 78 mm
    (5.8 x 4.4 x 3.1 in)
    124 x 94 x 64 mm
    (4.9 x 3.7 x 2.5 in)
    Camera Weight 812 g (28.6 oz) 522 g (18.4 oz)
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