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Nikon D3400 vs Sony A99 II

The Nikon D3400 and the Sony Alpha ALT-A99 II are two digital cameras that were revealed to the public, respectively, in August 2016 and September 2016. Both are DSLR (Digital Single Lens Reflex) cameras that are based on an APS-C (D3400) and a full frame (A99 II) sensor. The Nikon has a resolution of 24 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 D3400
versus
Sony A99 II
Nikon D3400   Sony A99 II
Digital single lens reflex Digital single lens reflex
Nikon F mount lenses Sony A mount lenses
24 MP – APS-C sensor 42.2 MP – Full Frame sensor
1080/60p Video 4K/30p Video
ISO 100-25,600 ISO 100-25,600
Optical viewfinder Electronic viewfinder (2400k dots)
3.0" LCD – 921k dots 3.0" LCD – 1229k dots
Fixed screen (not touch-sensitive) Fully flexible screen (no touchscreen)
5 shutter flaps per second 12 shutter flaps per second
Lens stabilization onlyIn-body stabilization
not weather sealedWeathersealed body
1200 shots per battery charge490 shots per battery charge
124 x 98 x 76 mm, 445 g 143 x 104 x 76 mm, 849 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D3400 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 D3400 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 measures are rounded to the nearest millimeter.

The D3400 can be obtained in two different colors (black, red), while the A99 II is only available in black.

Size Nikon D3400 vs Sony A99 II
Compare D3400 versus A99 II top
Comparison D3400 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 (22 percent) than the Nikon D3400. Moreover, the A99 II is substantially heavier (91 percent) than the D3400. It is noteworthy in this context that the A99 II is splash and dust-proof, while the D3400 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 D3400 gets 1200 shots out of its Nikon EN-EL14a battery, while the A99 II can take 490 images on a single charge of its Sony NP-FM500H power pack.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras 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 (USD)
Street
Price
1.
 
Nikon D3400 124 mm 98 mm 76 mm 445 g 1200 n Aug 2016 499ebay.com
2.
 
Sony A99 II 143 mm 104 mm 76 mm 849 g 490 Y Sep 2016 3,199ebay.com
3.
 
Canon 5DS R 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699ebay.com
4.
 
Canon SL2 122 mm 93 mm 70 mm 453 g 650 n Jun 2017 549ebay.com
5.
 
Nikon D500 147 mm 115 mm 81 mm 860 g 1240 Y Jan 2016 1,999ebay.com
6.
 
Nikon D850 146 mm 124 mm 79 mm 1005 g 1840 Y Jul 2017 3,299 amazon.com
7.
 
Nikon D3200 125 mm 96 mm 77 mm 505 g 540 n Apr 2012 599ebay.com
8.
 
Nikon D3300 124 mm 98 mm 76 mm 430 g 700 n Jan 2014 499ebay.com
9.
 
Nikon D3500 124 mm 97 mm 70 mm 415 g 1550 n Aug 2018 429ebay.com
10.
 
Nikon D5200 129 mm 98 mm 78 mm 555 g 500 n Nov 2012 749ebay.com
11.
 
Nikon D5300 125 mm 98 mm 76 mm 480 g 600 n Oct 2013 799ebay.com
12.
 
Nikon D5500 124 mm 97 mm 70 mm 470 g 820 n Jan 2015 899ebay.com
13.
 
Nikon D5600 124 mm 97 mm 70 mm 465 g 970 n Nov 2016 699ebay.com
14.
 
Nikon D7200 136 mm 107 mm 76 mm 765 g 1110 Y Mar 2015 1,199ebay.com
15.
 
Sony A7R II 127 mm 96 mm 60 mm 625 g 290 Y Jun 2015 3,199ebay.com
16.
 
Sony A7R IIIA 127 mm 96 mm 74 mm 650 g 650 Y Apr 2021 3,199 amazon.com
17.
 
Sony A7S II 127 mm 96 mm 60 mm 627 g 370 Y Sep 2015 2,999ebay.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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The D3400 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.

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. 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.

Of the two cameras under consideration, the Nikon D3400 features an APS-C sensor and the Sony A99 II a full frame sensor. The sensor area in the A99 II is 135 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 D3400 and Sony A99 II sensor measures

With 42.2MP, the A99 II offers a higher resolution than the D3400 (24MP), but the A99 II nevertheless has larger individual pixels (pixel pitch of 4.52μm versus 3.91μm for the D3400) due to its larger sensor. It is noteworthy in this context that the two cameras were released in close succession, so that their sensors are from the same technological generation. Coming back to sensor resolution, it should be mentioned that neither of the two cameras has an anti-alias filter installed, so they are able to capture all the detail the 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 D3400 are 30 x 20 inches or 76.2 x 50.8 cm for good quality, 24 x 16 inches or 61 x 40.6 cm for very good quality, and 20 x 13.3 inches or 50.8 x 33.9 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 D3400 has a native sensitivity range from ISO 100 to ISO 25600. 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 D3400 is build around a CMOS 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.

D3400 versus A99 II MP

For many cameras, data on sensor performance has been reported by DXO Mark. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. Of the two cameras under consideration, the A99 II has a markedly higher DXO score than the D3400 (overall score 6 points higher), which will translate into better image quality. The advantage is based on 0.6 bits higher color depth, 0.5 EV of lower dynamic range, and 1 stops in additional low light sensitivity. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

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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 D3400 APS-C 24.0 6000 40001080/60p24.813.9119286
2.
 
Sony A99 II Full Frame 42.2 7952 53044K/30p25.413.4231792
3.
 
Canon 5DS R Full Frame 50.3 8688 57921080/30p24.612.4230886
4.
 
Canon SL2 APS-C 24.0 6000 40001080/60p23.613.4104179
5.
 
Nikon D500 APS-C 20.7 5568 37124K/30p24.014.0132483
6.
 
Nikon D850 Full Frame 45.4 8256 55044K/30p26.414.82660100
7.
 
Nikon D3200 APS-C 24.1 6016 40001080/30p24.113.2113181
8.
 
Nikon D3300 APS-C 24.0 6000 40001080/60p24.312.8138582
9.
 
Nikon D3500 APS-C 24.0 6000 40001080/60p24.013.4185183
10.
 
Nikon D5200 APS-C 24.0 6000 40001080/60i24.213.9128484
11.
 
Nikon D5300 APS-C 24.0 6000 40001080/60p24.013.9133883
12.
 
Nikon D5500 APS-C 24.0 6000 40001080/60p24.114.0143884
13.
 
Nikon D5600 APS-C 24.0 6000 40001080/60p24.114.0130684
14.
 
Nikon D7200 APS-C 24.0 6000 40001080/60p24.514.6133387
15.
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
16.
 
Sony A7R IIIA Full Frame 42.2 7952 53044K/30p26.014.73523100
17.
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
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. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the A99 II provides a better video resolution than the D3400. It can shoot movie footage at 4K/30p, while the Nikon is limited to 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 II has an electronic viewfinder (2400k dots), while the D3400 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 D3400 (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 0.57x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The table below summarizes some of the other core capabilities of the Nikon D3400 and Sony A99 II in connection with corresponding information for a sample of similar 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 D3400optical n3.0 / 921 fixed n 1/4000s 5.0/s Y n
2.
 
Sony A99 II2400 Y3.0 / 1229 full-flex n 1/8000s 12.0/s n Y
3.
 
Canon 5DS Roptical Y3.2 / 1040 fixed n 1/8000s 5.0/s n n
4.
 
Canon SL2optical n3.0 / 1040 swivel Y 1/4000s 5.0/s Y n
5.
 
Nikon D500optical Y3.2 / 2359 tilting Y 1/8000s 10.0/s n n
6.
 
Nikon D850optical Y3.2 / 2359 tilting Y 1/8000s 9.0/s n n
7.
 
Nikon D3200optical n3.0 / 921 fixed n 1/4000s 4.0/s Y n
8.
 
Nikon D3300optical n3.0 / 921 fixed n 1/4000s 5.0/s Y n
9.
 
Nikon D3500optical n3.0 / 921 fixed n 1/4000s 5.0/s Y n
10.
 
Nikon D5200optical n3.0 / 921 swivel n 1/4000s 5.0/s Y n
11.
 
Nikon D5300optical n3.2 / 1037 swivel n 1/4000s 5.0/s Y n
12.
 
Nikon D5500optical n3.2 / 1037 swivel Y 1/4000s 5.0/s Y n
13.
 
Nikon D5600optical n3.2 / 1037 swivel Y 1/4000s 5.0/s Y n
14.
 
Nikon D7200optical Y3.2 / 1229 fixed n 1/8000s 6.0/s Y n
15.
 
Sony A7R II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
16.
 
Sony A7R IIIA3686 n3.0 / 2340 tilting Y 1/8000s 10.0/s n Y
17.
 
Sony A7S II2400 n3.0 / 1229 tilting 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 D3400 has one, while the A99 II does not. While the built-in flash of the D3400 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 D3400 does not have a selfie-screen.

The D3400 writes its imaging data to SDXC 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 D3400 only has one slot. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.

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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 D3400 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 D3400Ymono / mono--mini2.0--Y
2.
 
Sony A99 IIYstereo / monoYYmicro2.0YYY
3.
 
Canon 5DS RYmono / monoY-mini3.0---
4.
 
Canon SL2Ystereo / monoY-mini2.0YYY
5.
 
Nikon D500Ystereo / monoYYmini3.0YYY
6.
 
Nikon D850Ystereo / monoYYmini3.0YYY
7.
 
Nikon D3200Ymono / monoY-mini2.0---
8.
 
Nikon D3300Ymono / monoY-mini2.0---
9.
 
Nikon D3500Ymono / mono--mini2.0--Y
10.
 
Nikon D5200Ystereo / monoY-mini2.0---
11.
 
Nikon D5300Ystereo / monoY-mini2.0Y--
12.
 
Nikon D5500Ystereo / monoY-mini2.0Y--
13.
 
Nikon D5600Ystereo / monoY-mini2.0YYY
14.
 
Nikon D7200Ystereo / monoYYmini2.0YY-
15.
 
Sony A7R IIYstereo / monoYYmicro2.0YY-
16.
 
Sony A7R IIIAYstereo / monoYYmicro3.2YYY
17.
 
Sony A7S IIYstereo / monoYYmicro2.0YY-

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 D3400 does not provide wifi capability.

Studio photographers will appreciate that the Sony A99 II (unlike the D3400) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the D3400 and the A99 II have been discontinued, but can regularly be found used on ebay. The D3400 was replaced by the Nikon D3500, while the A99 II does not have a direct successor. Further information on the features and operation of the D3400 and A99 II can be found, respectively, in the Nikon D3400 Manual (free pdf) or the online Sony A99 II Manual.

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Review summary

So what is the bottom line? Which of the two cameras – the Nikon D3400 or the Sony A99 II – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.

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Reasons to prefer the Nikon D3400:

  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • More compact: Is smaller (124x98mm vs 143x104mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 404g or 48 percent) and hence easier to carry around.
  • Longer lasting: Can take more shots (1200 versus 490) 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 (84 percent cheaper at launch).

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Advantages of the Sony Alpha ALT-A99 II:

  • More detail: Has more megapixels (42.2 vs 24MP), which boosts linear resolution by 33%.
  • Better image quality: Scores markedly higher (6 points) in the DXO overall evaluation.
  • Better low-light sensitivity: Can shoot in dim conditions (1 stops ISO advantage).
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • Better sound: Can connect to an external microphone for higher quality sound recording.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • 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 0.57x).
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • More detailed LCD: Has a higher resolution rear screen (1229k vs 921k 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 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.
  • 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.

If the count of relative strengths (bullet points above) is taken as a measure, the A99 II is the clear winner of the contest (22 : 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 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.

D3400 06:22 A99 II

How about other alternatives? Do the specifications of the Nikon D3400 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 says little about, for example, the shooting experience and imaging performance of the D3400 and the A99 II in practical situations. 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 expert reviews 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 (USD)
Street
Price
1.
 
Nikon D34004/5+4/576/1004/54.5/5 Aug 2016 499ebay.com
2.
 
Sony A99 II....4.5/585/1004.5/54.5/5 Sep 2016 3,199ebay.com
3.
 
Canon 5DS R5/5+..83/1005/54.5/5 Feb 2015 3,699ebay.com
4.
 
Canon SL24/5+ +4/578/1004.5/54.5/5 Jun 2017 549ebay.com
5.
 
Nikon D5005/5+ +4.7/591/1004.5/55/5 Jan 2016 1,999ebay.com
6.
 
Nikon D8504.5/5+ +5/589/1004.5/55/5 Jul 2017 3,299 amazon.com
7.
 
Nikon D32005/5+ +..73/1004.5/54.5/5 Apr 2012 599ebay.com
8.
 
Nikon D33003/5+..77/1004.5/54.5/5 Jan 2014 499ebay.com
9.
 
Nikon D35004/5..4/575/1004/54.5/5 Aug 2018 429ebay.com
10.
 
Nikon D52004/5+ +..79/1004.5/54.5/5 Nov 2012 749ebay.com
11.
 
Nikon D53004/5+ +..79/1004.5/54.5/5 Oct 2013 799ebay.com
12.
 
Nikon D55005/5+..79/1004.5/54.5/5 Jan 2015 899ebay.com
13.
 
Nikon D56004/5..4/579/1004.5/54/5 Nov 2016 699ebay.com
14.
 
Nikon D72004/5+ +..84/1004.5/54.5/5 Mar 2015 1,199ebay.com
15.
 
Sony A7R II5/5+ +5/590/1005/55/5 Jun 2015 3,199ebay.com
16.
 
Sony A7R IIIA..+ +4/590/1004.5/55/5 Apr 2021 3,199 amazon.com
17.
 
Sony A7S II5/5+....4.5/55/5 Sep 2015 2,999ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, please note that some of the review sites have changed their methodology and reporting over time.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. 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: Nikon D3400 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 D3400 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 August 2016 September 2016
    Launch Price USD 499 USD 3,199
    Sensor Specs Nikon D3400 Sony A99 II
    Sensor Technology CMOS BSI-CMOS
    Sensor Format APS-C Sensor Full Frame Sensor
    Sensor Size 23.5 x 15.6 mm 35.9 x 24.0 mm
    Sensor Area 366.6 mm2 861.6 mm2
    Sensor Diagonal 28.2 mm 43.2 mm
    Crop Factor 1.5x 1.0x
    Sensor Resolution 24 Megapixels 42.2 Megapixels
    Image Resolution 6000 x 4000 pixels 7952 x 5304 pixels
    Pixel Pitch 3.91 μm 4.52 μm
    Pixel Density 6.55 MP/cm2 4.90 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability 1080/60p Video 4K/30p Video
    ISO Setting 100 - 25,600 ISO 100 - 25,600 ISO
    ISO Boost no Enhancement 50 - 25,600 ISO
    Image Processor EXPEED 4 BIONZ X
    DXO Sensor Quality (score) 86 92
    DXO Color Depth (bits) 24.8 25.4
    DXO Dynamic Range (EV) 13.9 13.4
    DXO Low Light (ISO) 1192 2317
    Screen Specs Nikon D3400 Sony A99 II
    Viewfinder Type Optical viewfinder Electronic viewfinder
    Viewfinder Field of View 95% 100%
    Viewfinder Magnification 0.57x 0.78x
    Viewfinder Resolution 2400k dots
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 921k dots 1229k dots
    LCD Attachment Fixed screen Fully flexible screen
    Shooting Specs Nikon D3400 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 5 shutter flaps/s 12 shutter flaps/s
    Shutter Life Expectancy100 000 actuations300 000 actuations
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium SDXC cards MS or SDXC cards
    Single or Dual Card Slots Single card slot Dual card slots
    UHS card support UHS-I UHS-I
    Connectivity Specs Nikon D3400 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 mini 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 Bluetooth built-in Bluetooth built-in
    Body Specs Nikon D3400 Sony A99 II
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Nikon EN-EL14a Sony NP-FM500H
    Battery Life (CIPA)1200 shots per charge490 shots per charge
    Body Dimensions 124 x 98 x 76 mm
    (4.9 x 3.9 x 3.0 in)
    143 x 104 x 76 mm
    (5.6 x 4.1 x 3.0 in)
    Camera Weight 445 g (15.7 oz) 849 g (29.9 oz)
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    Check D3400 offers at
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    Check A99 II offers at
    ebay.com

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