By Jim Fisher
The Rokinon 16mm T2.2 Cine DS ($ 599) is only one in Rokinon's line of affordably priced guide focus lenses for SLRs and mirorless cameras. As a part of the Cine DS collection it features a geared design that can be utilized with a spotlight pulling system. It covers a really large subject of view, and opens up all the best way to t/2.2 for low-mild images and videography. It is a sensible choice for APS-C SLR house owners, and occupies a reasonably distinctive place out there—not one of the main SLR techniques supply a comparable autofocus lens for cropped cameras. However in the event you shoot with a mirrorless camera chances are you'll discover it to be a bit cumbersome, as compact choices just like the Olympus M.Zuiko Digital 17mm f1.8, the Samsung 16mm f/2.4, and the Sony 16mm f/2.8 can be found.
Editors' Notice: This review is predicated on checks carried out on the Samyang 16mm F2.0 ED AS UMC CS. Except for the mechanics and branding, the lenses are optically equivalent, and we anticipate comparable efficiency.
The 16mm measures 3.4 by 3.4 inches (HD) and is a bit hefty at 1.3 kilos. Its measurement is not a problem with an SLR, however it might be a bit a lot for mirrorless techniques. It covers a subject of view that is equal to a 24mm prime on a full-body camera, though it does not supply an enormous measurement benefit over the Sigma 24mm F1.4 DG HSM Artwork, which is 3.6 by 3.3 inches and 1.5 kilos.
The barrel is composite plastic, however it's sturdy; the lens does not really feel low cost in any means. Gears adorn the barrel, so the main target may be adjusted with a spotlight pulling system. The space scale, in addition to the aperture scale, are printed on each side of the lens, so the main target operator can sit at both aspect. There isn't any rubber cowl on the main target ring, as there's with the version of the lens designed to be used for nonetheless images, so you might discover it a bit uncomfortable to show by hand. The ring does flip easily, with a one hundred eighty diploma throw to maneuver from the minimal 7.9-inch (0.2-meter) focus distance to infinity. A reversible lens hood is included. The aperture may be adjusted from t/2.2 by means of t/22; there are not any click stops.
Rokinon sells the lens for a number of camera methods. House owners of Canon, Nikon, and Sony SLRs can discover the lens in a local mount, as can mirrorless shooters who use Micro 4 Thirds or Sony cameras. It can be bought because the Samyang 16mm T2.2 VDSLR ED AS UMC CS II. In case you choose a version of the lens that is higher fitted to stll seize, conisder as an alternative the Samyang 16mm F2.0 ED AS UMC CS or Rokinon 16mm F2.0 ED AS UMC CS. Every has similar optics.
Picture High quality and Conclusions
The lens is meant to be used with APS-C (Tremendous 35) and 4 Thirds sensors, however it will probably mount on full-body cameras. I used it with the complete-body Nikon D810. The D810 has a DX (APS-C) in-camera crop mode which makes use of the middle of its 36-megapixel image sensor to seize 15.4-megapixel photographs. However I discovered that, when you're prepared to cope with darkening and softness on the edges of the body, a barely wider swath turns into useable. I pulled some acceptable 20-megapixel crops from the complete-body image, an efficient area of view that is extra like 21mm than 24mm. The image above is an uncropped shot from the D810, displaying what you will see when peering via a full-body viewfinder.
See How We Check Digital Cameras
I used Imatest to examine the sharpness of the lens when paired with the D810 in its APS-C crop mode. At t/2.2 it scores 2,483 strains per picture height on a middle-weighted sharpness check, higher than the 1,800 strains we wish to see in an image. Performance is robust proper to the sting of the body, with solely a slight drop in crispness (2,262 strains) compared with the middle.
There's enchancment as you cease down. At t/2.8 the lens improves to 2,573 strains. It crosses the 2,600-line mark at t/4 and peaks at t/5.6 (2,659 strains) and t/8 (2,686 strains), earlier than dropping barely at t/11 (2,639 strains). Diffraction takes its toll on photographs at t/16 (2,389 strains) and t/22 (2,221 strains).
Barrel distortion is modest, about 1.4 %. In the event you're photographing an image with straight strains or a transparent horizon you will in all probability discover a slight outward curve. There's some dimming on the edges of the body. Anticipate corners to drop about 4 stops in comparison with the middle at t/2.2, and about two stops at t/2.8. Past that you're going to nonetheless need to cope with about -1.5EV loss on the corners, which is noticeable, however not terribly distracting. Software program instruments, like Adobe Lightroom CC, can be utilized to take away distortion and brighten the corners of the body in the event you discover both impact distracting.
For those who do not thoughts—or for those who choose—guide focus, the Rokinon 16mm T2.2 Cine DS is a advantageous selection for an SLR. It is particularly properly fitted to APS-C fashions, capturing sharp pictures from edge to edge, even vast open, when paired with a camera just like the Canon Insurgent or the Nikon DX. However in the event you're a full-body consumer and may cope with the lack of sensor decision that capturing with a cropped space entails, do not rely it out—it will not offer you 16mm protection, however it could possibly crop right down to about 21mm properly. Mirrorless shooters might discover that it's kind of huge to pair with a compact camera, however it can ship the true really feel of a mechanical focus system that the majority digital focusing mirrorless lenses lack, and focusing manually with a magnified view on a rear LCD or digital viewfinder is a extra exact expertise than doing so by way of an optical viewfinder. So if a large-aperture, guide focus lens appeals to you, this 16mm t/2.2 is a wonderful option.
Source : PCMag.com