Đánh giá samyang 14mm f2.8 for sony

Sony shooters are spoiled for choice when it comes to ultra-wide lenses right now. This video from Chris Brockhurst takes an in-depth look at the 14mm f/2.8 FE, an autofocus prime lens from Rokinon/Samyang which stands out for its price and focal length.

Rokinon/Samyang has a reputation for producing lightweight, affordable autofocus glass for Sony full frame cameras without massively compromising quality. The AF 14mm f/2.8 FE is definitely in the same category, and while it’s not one of Samyang’s lightest lenses, it’s still not that hefty at only 1.11 lb (505 g).

I recently had the pleasure of reviewing Samyang’s new 75mm f/1.8, an everyday compact portrait lens that has proven to be incredibly convenient and a lot of fun — not to mention a bargain at just $399. Brockhurst mentions that the 14mm lens isn’t quite as sharp as other heavier, more expensive lenses, and the same is true of the 75mm. That’s not to say that it’s soft, per se; it’s just not as crisp as some pixel-peepers will demand. However, as an affordable, fast, ultra-wide prime, it seems to be a solid option, especially given how impressed Brockhurst is with the autofocus performance.

Are you a real-estate videographer pondering a new ultra-wide prime? Let us know your thoughts in the comments below.

Andy Day is a British photographer and writer living in France. He began photographing parkour in 2003 and has been doing weird things in the city and elsewhere ever since. He's addicted to climbing and owns a fairly useless dog. He has an MA in Sociology & Photography which often makes him ponder what all of this really means.

The Samyang AF 14mm f/2.8 FE is a new ultra-wide-angle prime lens for full-frame Sony Alpha cameras. The Samyang AF 14mm f/2.8 FE is comprised of 14 elements in 10 groups including 3 aspherical glass elements and an iris diaphragm with seven rounded aperture blades. It's the second ever Samyang lens to feature auto-focusing, incorporating a stepping motor for smooth and accurate autofocusing. On a full-frame camera body, the Samyang AF 14/2.8 FE lens offers an angle of view of 113.9 degrees, making it the widest rectilinear lens designed for Sony E-mount cameras. The lens has a minimum focusing distance of 20cm/0.656ft and a maximum reproduction ratio of 0.20x. The Samyang AF 14mm f/2.8 FE lens retails for £599 in the UK and €699 in Europe.

Ease of Use

Weighing in at 505 grams and measuring 9.75cm in length, the Samyang AF 14mm f/2.8 FE is quite a big lens given its focal length. As seen in the photos below, it rather dwarves the full-frame Sony A7R II camera, especially as the lens hood cannot be removed.

The Samyang AF 14mm f/2.8 FE lens mounted on a Sony A7R II

The Samyang AF 14mm f/2.8 FE lens mounted on a Sony A7R II

The Samyang AF 14mm f/2.8 FE lens mounted on a Sony A7R II

The Samyang AF 14mm f/2.8 FE lens alongside a Sony A7R II

Build quality is excellent. The lens has a metal housing and a metal mount too. The optical elements are made of high-grade glass and aspherical lenses have been included to minimise aberration and unnecessary light dispersion. The focus ring is pleasingly wide and ridged for easier grip.

Side of the Samyang AF 14mm f/2.8 FE lens

Front of the Samyang AF 14mm f/2.8 FE lens

Rear of the Samyang AF 14mm f/2.8 FE lens

Focusing is usefully internal and manual focusing is possible when set on the camera body. Full-time manual focus override is not available, and there's no distance and/or depth of field scale either.

Side of the Samyang AF 14mm f/2.8 FE lens

Side of the Samyang AF 14mm f/2.8 FE lens

The Samyang AF 14mm f/2.8 FE ships with a soft drawstring bag and a large plastic petal-shaped lens hood. It doesn't accept filters due to the fixed lens hood.

The Samyang AF 14mm f/2.8 FE lens in-hand

Focal Range

At the 14mm focal length the angle of view is 113.9 degrees.

14mm

Focusing

The Samyang AF 14mm f/2.8 FE lens has a wide focus ring. There are no hard stops at the ends of the range, making it more difficult to set focus at infinity.

When it comes to auto-focusing, the Samyang AF 14mm f/2.8 FE is a fairly quick performer, taking about 0.25 seconds to lock onto the subject when mounted on the Sony A7R II that we tested it with.

We didn't experience too much "hunting", either in good or bad light, with the lens accurately focusing almost all of the time. It has a pretty quiet focusing mechanism, too, which makes this lens well-suited to video recording.

Chromatic Aberrations

Chromatic aberrations, typically seen as purple or blue fringes along contrasty edges, were quite prevalent in our test shots, as shown in the examples below.

Light Fall-off

With the lens set to its maximum aperture of f/2.8, there is significant light fall-off in the corners. Stopping-down to f/8 virtually eliminates this.

Light fall-off at 14mm

Macro

The Samyang AF 14mm f/2.8 FE isn't claimed to be a macro lens, with a minimum focusing distance of 20cm/0.656ft and a magnification reproduction ratio of 0.12x. The following example demonstrates how close you can get to your subject, in this case a Compact Flash memory card.

Close-up performance

Bokeh

Bokeh is a word used for the out-of-focus areas of a photograph, and is usually described in qualitative terms, such as smooth / creamy / harsh etc. In the Samyang AF 14mm f/2.8 FE lens, Samyang employed an iris diaphragm with 7 rounded blades, which has resulted in quite nice bokeh in our view. We do realise, however, that bokeh evaluation is subjective, so we've included several 100% crops for your perusal.