Samyang's first AF lens for Nikon is an F mount version of the AF 14mm f2.8 ultra-wide prime. As with the Canon EF model, the F mount 14mm f2.8 provides Nikon D-SLR owners with an affordable alternative to the camera branded model, in this case the AF Nikkor 14mm f2.8 ED.
Externally, the barrel construction employs metal tubes with sealing against the intrusion of dust and moisture, including a rubber gasket around the lens mount. On the inside, the optical construction comprises 15 elements in ten groups which includes no fewer than seven special types – two aspherical elements, four made from high-refractive (HR) glass and one with extra-low dispersion (ED) characteriscs. The aspherical types correct for distortion and also optimise the centre-to-corner uniformity of sharpness while the others primarily deal with chromatic and spherical aberrations.
Samyang’s ‘Ultra Multi Coating’ (UMC) anti-reflection coatings are applied to minimise ghosting and flare. Given the angle-of-view of 116.6 degrees (diagonal on a full-35mm sensor), the petal-type hood is built-in and there’s no provision for fitting screwthread filters. The focusing group is internal and enables a minimum focusing distance of 20 centimetres, giving a maximum reproduction ratio of 1:6.6. The diaphragm comprises seven blades to give smoother out-of-focus effects.
The Samyang AF 14mm f2.8 F will be available in Australia in September. Samyang lenses are distributed locally by Maxxum Pty Ltd and for more information visit http://www.maxxum.com.au or http://www.samyanglensglobal.com