PW

Sony A77 versus Nikon D3400

The Sony Alpha SLT-A77 and the Nikon D3400 are two digital cameras that were announced, respectively, in August 2011 and August 2016. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. Both cameras offer a resolution of 24 megapixel.

Body comparison

The side-by-side display below illustrates the physical size and weight of the Sony A77 and the Nikon D3400. Three successive views from the front, the top, and the rear are shown. All size dimensions are rounded to the nearest millimeter. If you prefer, you can also use the toggle button to switch to a comparison in percentage terms (in this case, the camera on the left – the A77 – represents 100 percent across all the size and weight measures).

Sony A77 vs Nikon D3400 front
A77 versus D3400 top view
A77 and D3400 rear side
Body view (A77 on the left)

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Nikon D3400 is considerably smaller (80 percent) than the Sony A77. Moreover, the D3400 is substantially lighter (39 percent) than the A77. It is worth mentioning in this context that the A77 is splash and dust resistant, 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 the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you want to switch the focus of the display and review another camera pair, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible comparisons there.

Camera Body Specifications
Camera Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(y/n)
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Sony A77 (⇒ rgt) 143 mm 104 mm 81 mm 732 g 470 YES 2011 1,999discont. check
Nikon D3400 (⇒ lft) 124 mm 98 mm 76 mm 445 g 1200 no 2016 499 latest check
Canon SL2 (⇒ lft | rgt) 122 mm 93 mm 70 mm 453 g 650 no 2017 549 latest check
Canon 6D (⇒ lft | rgt) 145 mm 111 mm 71 mm 770 g 1090 YES 2012 2,099discont. check
Nikon D5600 (⇒ lft | rgt) 124 mm 97 mm 70 mm 465 g 970 no 2016 699 latest check
Nikon D5500 (⇒ lft | rgt) 124 mm 97 mm 70 mm 420 g 820 no 2015 899discont. check
Nikon D3300 (⇒ lft | rgt) 124 mm 98 mm 76 mm 430 g 700 no 2014 499discont. check
Nikon D600 (⇒ lft | rgt) 141 mm 113 mm 82 mm 850 g 900 YES 2012 2,099discont. check
Nikon D3200 (⇒ lft | rgt) 125 mm 96 mm 77 mm 505 g 540 no 2012 599discont. check
Olympus E-M1 II (⇒ lft | rgt) 134 mm 91 mm 67 mm 574 g 440 YES 2016 1,999 latest check
Panasonic GH5 (⇒ lft | rgt) 139 mm 98 mm 87 mm 725 g 410 YES 2017 1,999 latest check
Sony A9 (⇒ lft | rgt) 127 mm 96 mm 63 mm 673 g 650 YES 2017 4,499 latest check
Sony A7 II (⇒ lft | rgt) 127 mm 96 mm 60 mm 599 g 350 YES 2014 1,999 latest check
Sony A77 II (⇒ lft | rgt) 143 mm 104 mm 81 mm 647 g 480 YES 2014 1,199 latest check
Sony A7 (⇒ lft | rgt) 127 mm 94 mm 48 mm 474 g 340 YES 2013 1,699discont. check
Sony A99 (⇒ lft | rgt) 147 mm 111 mm 78 mm 812 g 500 YES 2012 2,799discont. check
Sony A850 (⇒ lft | rgt) 156 mm 117 mm 82 mm 895 g 880 YES 2009 1,999discont. check

The listed 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 75 percent) than the A77, 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. 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. 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 are more costly to manufacture and tent to lead to bigger and heavier cameras and lenses.

Both cameras under consideration feature an APS-C sensor and have a format factor (sometimes also referred to as "crop factor") of 1.5. Within the spectrum of camera sensors, this places the review cameras among the medium-sized sensor cameras that aim to strike a balance between image quality and portability. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Sony A77 and Nikon D3400 sensor measures
Sensor size

The two cameras under review do not only share the same sensor size, but also offer an identical resolution of 24 megapixel. This similarity in sensor specs implies that both the A77 and the D3400 have the same pixel density, as well as the same pixel size. It should, however, be noted that the D3400 is much more recent (by 4 years and 11 months) than the A77, and its sensor will have benefitted from technological advances during this time. Coming back to sensor resolution, it should be mentioned that the D3400 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

A77 versus D3400 MP
Sensor resolution

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 D3400 has a markedly higher DXO score than the A77 (overall score 8 points higher), which will translate into better image quality. The advantage is based on 0.8 bits higher color depth, 0.7 EV in additional dynamic range, and 0.6 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.

Sensor Characteristics
Camera Sensor
Class
Resolution
(Megapixel)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Sony A77 (⇒ rgt) APS-C 24.0 6000 4000 1080/60p 24 13.2 801 78
Nikon D3400 (⇒ lft) APS-C 24.0 6000 4000 1080/60p 24.8 13.9 1192 86
Canon SL2 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 23.6 13.4 1041 79
Canon 6D (⇒ lft | rgt) Full Frame 20.0 5472 3648 1080/30p 23.8 12.1 2340 82
Nikon D5600 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 24.1 14.0 1306 84
Nikon D5500 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 24.1 14.0 1438 84
Nikon D3300 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 24.3 12.8 1385 82
Nikon D600 (⇒ lft | rgt) Full Frame 24.2 6016 4016 1080/30p 25.1 14.2 2980 94
Nikon D3200 (⇒ lft | rgt) APS-C 24.1 6016 4000 1080/30p 24.1 13.2 1131 81
Olympus E-M1 II (⇒ lft | rgt) Four Thirds 20.2 5184 3888 4K/30p 23.7 12.8 1312 80
Panasonic GH5 (⇒ lft | rgt) Four Thirds 20.2 5184 3888 4K/60p 23.9 13.0 807 77
Sony A9 (⇒ lft | rgt) Full Frame 24.0 6000 4000 4K/30p 24.9 13.3 3517 92
Sony A7 II (⇒ lft | rgt) Full Frame 24.0 6000 4000 1080/60p 24.9 13.6 2449 90
Sony A77 II (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p - - - -
Sony A7 (⇒ lft | rgt) Full Frame 24.0 6000 4000 1080/60p 24.8 14.2 2248 90
Sony A99 (⇒ lft | rgt) Full Frame 24.0 6000 4000 1080/60p 25.0 14.0 1555 89
Sony A850 (⇒ lft | rgt) Full Frame 24.4 6048 4032 no 23.8 12.2 1415 79

Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, and both provide the same movie specifications (1080/60p).

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the A77 has an electronic viewfinder (2359k 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 adjacent table lists some of the other core features of the Sony A77 and Nikon D3400 along with similar information for a selection of comparators. The full specs-sheets can be found in the camera manual or, for example, in the dpreview camera hub.

Core Features
Camera Viewfinder
(Type or
'000 dots)
Control
Panel
(Y/n)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(Y/n)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec))
Build-in
Flash
(GN)
Build-in
Image
Stab
Sony A77 (⇒ rgt) 2359 YES 3.0 921 full-flex no 8000 12.0 12 YES
Nikon D3400 (⇒ lft) optical no 3.0 921 fixed no 4000 5.0 7 no
Canon SL2 (⇒ lft | rgt) optical no 3.0 1040 swivel YES 4000 5.0 9.8 no
Canon 6D (⇒ lft | rgt) optical YES 3.0 1040 fixed no 4000 4.5 no no
Nikon D5600 (⇒ lft | rgt) optical no 3.2 1037 swivel YES 4000 5.0 12 no
Nikon D5500 (⇒ lft | rgt) optical no 3.2 1037 swivel YES 4000 5.0 12 no
Nikon D3300 (⇒ lft | rgt) optical no 3.0 921 fixed no 4000 5.0 12 no
Nikon D600 (⇒ lft | rgt) optical YES 3.0 921 fixed no 4000 5.5 12 no
Nikon D3200 (⇒ lft | rgt) optical no 3.0 921 fixed no 4000 4.0 12 no
Olympus E-M1 II (⇒ lft | rgt) 2360 no 3.0 1037 swivel YES 8000 18.0 no YES
Panasonic GH5 (⇒ lft | rgt) 3680 no 3.2 1620 swivel YES 8000 12.0 no YES
Sony A9 (⇒ lft | rgt) 3686 no 3.0 1440 tilting YES 8000 20.0 no YES
Sony A7 II (⇒ lft | rgt) 2400 no 3.0 1230 tilting no 8000 5.0 no YES
Sony A77 II (⇒ lft | rgt) 2359 YES 3.0 1229 full-flex no 8000 12.0 12 YES
Sony A7 (⇒ lft | rgt) 2400 no 3.0 1230 tilting no 8000 5.0 no no
Sony A99 (⇒ lft | rgt) 2359 YES 3.0 1229 full-flex no 8000 6.0 no YES
Sony A850 (⇒ lft | rgt) optical YES 3.0 922 fixed no 8000 3.0 no YES

The D3400 is a current model that online retailers, such as amazon, will have in stock. In contrast, the A77 has been discontinued (but it can be found pre-owned on ebay). As a replacement in the same line of cameras, the A77 was succeeded by the Sony A77 II.

Summary

So what is the bottom line? Is the Sony A77 better than the Nikon D3400 or vice versa? The listing below highlights the relative strengths of the two models.


logo checkmark

Reasons to prefer the Sony Alpha SLT-A77:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • Easier setting verification: Has an LCD display on top to control shooting parameters.
  • More flexible LCD: Has full-flex screen for odd-angle shots in portrait or landscape orientation.
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
  • Faster burst: Shoots at higher frequency (12 vs 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 build-in.
  • More heavily discounted: Has been available for much longer (launched in August 2011).

logo checkmark

Arguments in favor of the Nikon D3400:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores markedly higher (8 points) in the DXO overall evaluation.
  • More dynamic range: Captures a broader range of light and dark details (0.7 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (0.6 stops ISO advantage).
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • More compact: Is smaller (124x98mm vs 143x104mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 287g or 39 percent) and is thus easier to take along.
  • Longer lasting: Gets more shots (1200 versus 470) out of a single battery charge.
  • More affordable: Was introduced into a lower priced category (75 percent cheaper at launch).
  • More modern: Reflects 4 years and 11 months of technical progress since the A77 launch.

If the count of relative strengths (bullet points above) is taken as a measure, the D3400 comes out slightly ahead of the A77 (10 : 9 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs.

A77 09:10 D3400

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the handling experience and imaging performance when actually working with the A77 or the D3400. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate. This is why hands-on reviews by experts are important. The following table reports the overall rankings of the cameras as published by some of the major camera review sites. The detailed reviews can be accessed, respectively, on the websites of cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.

Review scores
Camera camera
labs
dp
review
ephoto
zine
imaging
resource
photography
blog
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Sony A77 (⇒ rgt) 91/100 81/100 Silver - 4.5/5 5/5 2011 1,999discont. check
Nikon D3400 (⇒ lft) Rec 76/100 4/5 4.5/5 4.5/5 2016 499 latest check
Canon SL2 (⇒ lft | rgt) HiRec 78/100 Silver 4.5/5 - 4.5/5 2017 549 latest check
Canon 6D (⇒ lft | rgt) HiRec 83/100 Silver 4.5/5 4.5/5 4.5/5 2012 2,099discont. check
Nikon D5600 (⇒ lft | rgt) - 79/100 Silver 4.5/5 4.5/5 4/5 2016 699 latest check
Nikon D5500 (⇒ lft | rgt) Rec 79/100 Silver 4.5/5 5/5 4.5/5 2015 899discont. check
Nikon D3300 (⇒ lft | rgt) Rec 77/100 Silver 4.5/5 4.5/5 4.5/5 2014 499discont. check
Nikon D600 (⇒ lft | rgt) HiRec 87/100 Gold 5/5 4.5/5 4.5/5 2012 2,099discont. check
Nikon D3200 (⇒ lft | rgt) HiRec 73/100 Silver 4.5/5 4.5/5 4.5/5 2012 599discont. check
Olympus E-M1 II (⇒ lft | rgt) HiRec 85/100 Gold 4.5/5 5/5 4.5/5 2016 1,999 latest check
Panasonic GH5 (⇒ lft | rgt) HiRec 85/100 Gold 4.5/5 5/5 5/5 2017 1,999 latest check
Sony A9 (⇒ lft | rgt) .. 89/100 Gold 5/5 5/5 5/5 2017 4,499 latest check
Sony A7 II (⇒ lft | rgt) Rec 82/100 Silver 4.5/5 5/5 5/5 2014 1,999 latest check
Sony A77 II (⇒ lft | rgt) - 80/100 Silver 4.5/5 4/5 5/5 2014 1,199 latest check
Sony A7 (⇒ lft | rgt) HiRec 80/100 Silver 5/5 4.5/5 5/5 2013 1,699discont. check
Sony A99 (⇒ lft | rgt) - 84/100 Gold 4.5/5 reviewed 4.5/5 2012 2,799discont. check
Sony A850 (⇒ lft | rgt) - 75/100 - 4/5 4.5/5 2009 1,999discont. check

The review scores listed above should be treated with care, 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. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

Other comparisons

If you would like to see a different side-by-side camera review, just use the search menu below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting. If the camera you are interested in is not available, please contact me, and I will try to locate and add the respective data to the application.

vs