Sony A7S versus Nikon Df
The Sony Alpha A7S and the Nikon Df are two digital cameras that were officially introduced, respectively, in April 2014 and November 2013. The A7S is a mirrorless interchangeable lens camera, while the Df is a DSLR. Both cameras are equipped with a full frame sensor. The Sony has a resolution of 12 megapixel, whereas the Nikon provides 16.2 MP. Read on to find out how these two cameras compare with respect to their size, their sensors, their features, and their reception by expert reviewers.
Body comparison: Sony A7S vs Nikon Df
The side-by-side display below illustrates the physical size and weight of the Sony A7S and the Nikon Df. Three consecutive perspectives from the front, the top, and the back are presented. All size dimensions are rounded to the nearest millimeter. You can also use the toggle button to switch to a percentage comparison if you prefer that the measures are being expressed in relative terms (in this case, the camera on the left – the A7S – represents the basis or 100 percent across all the size and weight measures).
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Nikon Df is notably larger (33 percent) than the Sony A7S. Moreover, the Df is substantially heavier (55 percent) than the A7S. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.
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. Both cameras have similarly sized sensors, but DSLRs have a larger flange-to-focal plane distance than mirrorless cameras, which imposes contraints on the optical engineering process and generally leads to bigger and heavier lenses. You can find an overview of optics for the two cameras in the Sony FE Lens Catalog (A7S) and the Nikon Lens Catalog (Df). Mirrorless cameras, such as the Sony A7S, have moreover the advantage that they have a relatively short flange to focal plane distance and can thus use many lenses from other systems via adapters.
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 camera comparisons there.
|Camera Body Specifications
|Sony A7S (⇒ rgt)||5.0 in||3.7 in||1.9 in||17.2 oz||380||YES||2014||2,499||discont.||check|
|Nikon Df (⇒ lft)||5.7 in||4.3 in||2.6 in||26.8 oz||1400||YES||2013||2,749||latest||check|
|Nikon D750 (⇒ lft | rgt)||5.6 in||4.4 in||3.1 in||26.5 oz||1230||YES||2014||2,299||latest||check|
|Nikon D810 (⇒ lft | rgt)||5.7 in||4.8 in||3.2 in||34.6 oz||1200||YES||2014||3,299||discont.||check|
|Nikon D4S (⇒ lft | rgt)||6.3 in||6.2 in||3.6 in||47.6 oz||3020||YES||2014||6,499||discont.||check|
|Nikon D4 (⇒ lft | rgt)||6.3 in||6.2 in||3.6 in||47.3 oz||2600||YES||2012||5,999||discont.||check|
|Nikon D800 (⇒ lft | rgt)||5.7 in||4.8 in||3.2 in||35.3 oz||900||YES||2012||2,999||discont.||check|
|Nikon D700 (⇒ lft | rgt)||5.8 in||4.8 in||3.0 in||37.9 oz||1000||YES||2008||2,999||discont.||check|
|Sony A6300 (⇒ lft | rgt)||4.7 in||2.6 in||1.9 in||14.3 oz||400||YES||2016||999||discont.||check|
|Sony A7R II (⇒ lft | rgt)||5.0 in||3.8 in||2.4 in||22.0 oz||290||YES||2015||3,199||discont.||check|
|Sony A7S II (⇒ lft | rgt)||5.0 in||3.8 in||2.4 in||22.1 oz||370||YES||2015||2,999||latest||check|
|Sony A7 II (⇒ lft | rgt)||5.0 in||3.8 in||2.4 in||21.1 oz||350||YES||2014||1,999||discont.||check|
|Sony A7 (⇒ lft | rgt)||5.0 in||3.7 in||1.9 in||16.7 oz||340||YES||2013||1,699||discont.||check|
|Sony A7R (⇒ lft | rgt)||5.0 in||3.7 in||1.9 in||16.4 oz||340||YES||2013||2,299||discont.||check|
|Sony RX1R (⇒ lft | rgt)||4.4 in||2.6 in||2.8 in||17.0 oz||270||no||2013||2,799||discont.||check|
The price is, of course, an important factor in any camera decision. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The A7S was somewhat cheaper (by 9 percent) than the Df at launch, but both cameras fall into the same price category. 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: Sony A7S vs Nikon Df
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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.
Both cameras under consideration feature a full frame sensor, but their sensors differ slightly in size. They nevertheless have the same format factor of 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
With 16.2MP, the Df offers a higher resolution than the A7S (12MP), but the Df has smaller individual pixels (pixel pitch of 7.29μm versus 8.45μm for the A7S). It is noteworthy in this context that the A7S is a somewhat more recent model (by 4 months) than the Df, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units.
Consistent information on actual sensor performance is available from DXO Mark for most cameras. 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. The Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar image quality. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
|Sony A7S (⇒ rgt)||Full Frame||12.0||4240||2832||1080/60p||23.9||13.2||3702||87|
|Nikon Df (⇒ lft)||Full Frame||16.2||4928||3280||no||24.6||13.1||3279||89|
|Nikon D750 (⇒ lft | rgt)||Full Frame||24.2||6016||4016||1080/60p||24.8||14.5||2956||93|
|Nikon D810 (⇒ lft | rgt)||Full Frame||36.2||7360||4912||1080/60p||25.7||14.8||2853||97|
|Nikon D4S (⇒ lft | rgt)||Full Frame||16.2||4928||3280||1080/60p||24.4||13.3||3074||89|
|Nikon D4 (⇒ lft | rgt)||Full Frame||16.2||4928||3280||1080/30p||24.7||13.1||2965||89|
|Nikon D800 (⇒ lft | rgt)||Full Frame||36.2||7360||4912||1080/30p||25.3||14.4||2853||95|
|Nikon D700 (⇒ lft | rgt)||Full Frame||12.1||4256||2832||no||23.5||12.2||2303||80|
|Sony A6300 (⇒ lft | rgt)||APS-C||24.0||6000||4000||4K/30p||24.4||13.7||1437||85|
|Sony A7R II (⇒ lft | rgt)||Full Frame||42.2||7952||5304||4K/30p||26.0||13.9||3434||98|
|Sony A7S II (⇒ lft | rgt)||Full Frame||12.0||4240||2832||4K/30p||23.6||13.3||2993||85|
|Sony A7 II (⇒ lft | rgt)||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90|
|Sony A7 (⇒ lft | rgt)||Full Frame||24.0||6000||4000||1080/60p||24.8||14.2||2248||90|
|Sony A7R (⇒ lft | rgt)||Full Frame||36.2||7360||4912||1080/60p||25.6||14.1||2746||95|
|Sony RX1R (⇒ lft | rgt)||Full Frame||24.0||6000||4000||1080/60p||25.0||13.6||2537||91|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. The A7S indeed provides movie recording capabilities, while the Df does not. The highest resolution format that the A7S can use is 1080/60p.
Feature comparison: Sony A7S vs Nikon Df
Apart from body and sensor, cameras can and do differ across a range of features. For example, the A7S has an electronic viewfinder (2400k dots), while the Df 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 A7S and Nikon Df along with similar information for a selection of comparators. If you need more detail on the specs, you can find comprehensive listings, for example, in the dpreview camera hub.
|Sony A7S (⇒ rgt)||2400||no||3.0||921||tilting||no||8000||5.0||no||no|
|Nikon Df (⇒ lft)||optical||YES||3.2||921||fixed||no||4000||5.5||no||no|
|Nikon D750 (⇒ lft | rgt)||optical||YES||3.2||1229||tilting||no||4000||6.0||12||no|
|Nikon D810 (⇒ lft | rgt)||optical||YES||3.2||1229||fixed||no||4000||5.0||12||no|
|Nikon D4S (⇒ lft | rgt)||optical||YES||3.2||921||fixed||no||8000||11.0||no||no|
|Nikon D4 (⇒ lft | rgt)||optical||YES||3.2||921||fixed||no||8000||11.0||no||no|
|Nikon D800 (⇒ lft | rgt)||optical||YES||3.2||921||fixed||no||8000||4.0||12||no|
|Nikon D700 (⇒ lft | rgt)||optical||YES||3.0||922||fixed||no||8000||8.0||12||no|
|Sony A6300 (⇒ lft | rgt)||2300||no||3.0||922||tilting||no||4000||11.0||6||no|
|Sony A7R II (⇒ lft | rgt)||2400||no||3.0||1229||tilting||no||8000||5.0||no||YES|
|Sony A7S II (⇒ lft | rgt)||2400||no||3.0||1229||tilting||no||8000||5.0||no||YES|
|Sony A7 II (⇒ lft | rgt)||2400||no||3.0||1230||tilting||no||8000||5.0||no||YES|
|Sony A7 (⇒ lft | rgt)||2400||no||3.0||1230||tilting||no||8000||5.0||no||no|
|Sony A7R (⇒ lft | rgt)||2400||no||3.0||1230||tilting||no||8000||4.0||no||no|
|Sony RX1R (⇒ lft | rgt)||no||no||3.0||1229||fixed||no||4000||5.0||6||no|
The Df is a current model that online retailers, such as amazon, will have in stock. In contrast, the A7S has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the A7S was succeeded by the Sony A7S II.
Review summary: Sony A7S vs Nikon Df
So what conclusions can be drawn? Is there a clear favorite between the Sony A7S and the Nikon Df? A synthesis of the relative strong points of each of the models is listed below.
Advantages of the Sony Alpha A7S:
- 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 flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
- More compact: Is smaller (127x94mm vs 144x110mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 271g or 36 percent) and hence easier to carry around.
- More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
- More modern: Is somewhat more recent (announced 4 months after the Df).
Arguments in favor of the Nikon Df:
- More detail: Has more megapixels (16.2 vs 12MP), which boosts linear resolution by 16%.
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Easier setting verification: Has a control panel on top to check shooting parameters.
- Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
- Longer lasting: Gets more shots (1400 versus 380) out of a single battery charge.
- More heavily discounted: Has been on the market for longer (launched in November 2013).
If the count of individual advantages (bullet points above) is taken as a guide, the A7S emerges as the winner of the contest (8 : 6 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 before making a camera decision.
In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the A7S or the Df handle or perform in practice. 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 where reviews by experts come in. The following table reports the overall rankings of the cameras as published by some of the major camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). You can find the full text of the reviews by clicking on the site logo in the table header.
|Sony A7S (⇒ rgt)||-||86/100 Gold||4.5/5||4.5/5||5/5||2014||2,499||discont.||check|
|Nikon Df (⇒ lft)||-||81/100||4/5||4/5||4/5||2013||2,749||latest||check|
|Nikon D750 (⇒ lft | rgt)||HiRec||90/100 Gold||4.5/5||5/5||4.5/5||2014||2,299||latest||check|
|Nikon D810 (⇒ lft | rgt)||-||86/100 Gold||5/5||4.5/5||4.5/5||2014||3,299||discont.||check|
|Nikon D4S (⇒ lft | rgt)||-||-||4.5/5||5/5||4.5/5||2014||6,499||discont.||check|
|Nikon D4 (⇒ lft | rgt)||-||-||4.5/5||-||4.5/5||2012||5,999||discont.||check|
|Nikon D800 (⇒ lft | rgt)||HiRec||82/100 Gold||5/5||5/5||5/5||2012||2,999||discont.||check|
|Nikon D700 (⇒ lft | rgt)||89/100||HiRec||4.5/5||5/5||4.5/5||2008||2,999||discont.||check|
|Sony A6300 (⇒ lft | rgt)||Rec||85/100 Gold||5/5||5/5||5/5||2016||999||discont.||check|
|Sony A7R II (⇒ lft | rgt)||HiRec||90/100 Gold||5/5||4.5/5||5/5||2015||3,199||discont.||check|
|Sony A7S II (⇒ lft | rgt)||Rec||-||4.5/5||5/5||5/5||2015||2,999||latest||check|
|Sony A7 II (⇒ lft | rgt)||Rec||82/100 Silver||4.5/5||5/5||5/5||2014||1,999||discont.||check|
|Sony A7 (⇒ lft | rgt)||HiRec||80/100 Silver||5/5||4.5/5||5/5||2013||1,699||discont.||check|
|Sony A7R (⇒ lft | rgt)||HiRec||82/100 Gold||4.5/5||5/5||5/5||2013||2,299||discont.||check|
|Sony RX1R (⇒ lft | rgt)||-||-||4/5||reviewed||4.5/5||2013||2,799||discont.||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. 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. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.
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