There is no hyperfocal distance scale, or hard infinity stop, which is unusual for a lens like this, which uses no low dispersion glass in its optical design. For still images, keeping a distance equal to the diagonal length of the full image surface is recommended. The full frame sensor of a digital camera is 36 x 24mm and the diagonal length is 43.26mm so any distance close to this number is nearer to the ideal than the currently accepted industry standard of 50mm. The 85mm f/1.4 lens is a classic focal length, long considered the ideal for portraiture, along with landscapes, close up sports and low light photography. Lenses slightly longer than the standard for a format have also traditionally been the pinnacle of optical quality within a range. Samyang have been building an enviable reputation for quality lenses, first in manual focus, more recently moving successfully into AF and now also encompassing the full frame mirrorless Sony cameras. Let's have a closer look, using the 24MP Sony Alpha A7 III body. En situation réelle les résultants obtenus sont très bons, on remarque néanmoins occasionnellement des petits ratés d’Af sur les sujets en mouvements The Samyang AF 85mm f/1.4 FE (also known as the Rokinon AF 85mm f/1.4 in the USA) is a new fast portrait prime lens for full-frame Sony Alpha cameras.

Samyang XP lenses: Samyang also offers a range of ‘Premium Manual Focus’ optics for DSLRs, all of which are full-frame compatible and available in Canon EF-mount. Bearing the ‘XP’ (XPert) name, they currently range from the XP 10mm f/3.5 to the XP 85mm f/1.2. The 14mm lens is also available in Nikon F-mount.The lens’s attractive bokeh, created through precise lens polishing, adds a great feeling of depth and space in your photographs. Also, its aperture mechanism comprises 9 precisely-controlled iris blades, providing natural, circular, out-of-focus highlights at all apertures. With this smooth bokeh, achieved through various optical technologies, you can create images full of character in your portrait or subject photography. 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 focusing ring is pleasingly wide and ridged for easier grip. We’ll work through the chart results by first looking at distortion and vignette. As of yet there isn’t a correction profile available in Lightroom, but you can use the first generation profile without issue since the two lenses are essentially optically identical (with one caveat that I’ll discuss in a moment!) As well as wide-angle, standard and telephoto manual-focus lenses, specialist optics in the range include macro and tilt/shift lenses. Samyang also makes cine lenses but, for now, let’s take a closer look at some of the most popular lenses in the autofocus, premium manual, crop-sensor manual and full-frame manual lines. La qualité de construction du Sigma 85mm F1.4 DG DN Art fait jeu égal avec le Sony FE85mm F1.4 GM et est au dessus des Samyang et Sony FE85mm F1.8

Lateral chromatic aberration is reasonably well controlled at f/1.4 but can be rather noticeable at narrower apertures. It’s rather worse than in most competing 85mm prime lenses. Distortion: 1.16 With the lens set to its maximum aperture of f/1.4, there is significant light fall-off in the corners. Stopping-down to f/5.6 virtually eliminates this. Quand on ferme , dès F2 on voit les 9 lames du diaphragme et dans certaines occasions des franges sur les bords La résistance au flare est juste bonne , on peut en avoir facilement du flare en pointant l’objectif vers le soleil The Samyang AF 85mm f/1.4 FE is comprised of 11 optical elements in 8 groups, including 4 HR (high-resolution) glass elements and 1 ED (extra-low dispersion) glass element. It features a rounded 9 blade diaphragm which creates an attractive blur to out of focus areas of the image.Onboard controls boil down to a single autofocus/manual focus switch and a manual focus ring. The autofocus system itself is based on a Dual LSM (Linear Supersonic Motor), which is fast and virtually silent in operation. However, unlike with an ultrasonic ring-type arrangement, the manual focus ring has an electronic rather than mechanical coupling. The upshot is that the focus ring only works when power is supplied from the camera, for example after a light press of the shutter button. Samyang AF 85mm f/1.4: Performance Why you can trust Digital Camera World Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out how we test.

Chromatic aberrations, typically seen as purple or blue fringes along contrasty edges, were not too much of a problem in our test shots, as shown in the examples below. It's also the latest Samyang lens to feature auto-focusing, incorporating an Ultrasonic Dual Linear stepping motor for smooth and accurate autofocusing. The Samyang AF 85mm f/1.4 FE has a very wide focus ring given the overall size of the lens. There are no hard stops at the ends of the range, making it more difficult to set focus at infinity. Polariser users should be pleased that the 77mm filter thread doesn't rotate on focus.

ADVERTISEMENT

Weighing in at a solid, but not over-heavy 568g this chunky Samyang lens has all the quality of construction that we have come to expect. It inspires confidence from the start that it will give good, long service. It is weather resistant and is claimed to be splashproof and dustproof, a feature that is rapidly becoming virtually essential in our variable climate. Optical construction is 11 elements in 8 groups, including 4 HR (High Refractive Index) and 1 ED (Extra Low Dispersion) elements. UMC coating is Samyang's own version of Ultra Multicoating. There are 9 blades in the diaphragm, to assist in producing smooth bokeh; the quality and gradation of the out of focus areas in an image. The Samyang FE 85mm lens boasts a weather-sealed design and there's a UMC Super multi-layer coating to help reduce flare and ghosting. It has a minimum focusing distance of 0.90m (2.95ft) and a maximum reproduction ratio of 0.11x. Sharpness is good rather than insanely great at f/1.4, while defocused areas look beautifully soft and dreamy (Image credit: Matthew Richards) L’ergonomie est en dessous des Sigma et Sony GM car ceux ci ont une vrai bague d’ouverture avec ou sans clics