Sony has announced the FE 135mm f1.8 GM telephoto prime lens will ship in late April 2019 for around US$1900.
The premium G Master lens has an optical design with two XA (extreme aspherical) and Super ED (Extra-low Dispersion) glass elements in the front group to suppress common telephoto aberrations. The Super ED elements and ED glass element are positioned to compensate axial chromatic aberration, minimise colour fringing, and maximise resolution.
The prime lens also has an XA element, refined with what Sony’s calling ‘bokeh simulation technologies’, to control spherical aberration and, well, provide ‘exquisite bokeh’.
It also has an 11-bladed circular aperture mechanism, which additionally contributes towards natural background defocus.
Dual autofocus groups in a floating focus arrangement improve close-up shooting, providing minimum focus distance of .7 meters and a maximum magnification of .25x.
Four proprietary XD linear motors have been added, two for each group, to achieve a fast and reliable AF tracking and performance. A control algorithm also helps control response and quiet, low-vibration AF.
Sony has applied the Nano AR Coating to reduce flare and ghosting that can occur when shooting backlit portraits.
The mighty new prime lens also features dual-autofocus groups in a floating focus arrangement for improved close-up capability, allowing a minimum focus distance of just 0.7 meters and a maximum magnification of 0.25x.
The lens exterior includes an aperture ring, a focus ring with Linear Response MF, a focus range limiter switch, two customisable focus hold buttons, and a focus-mode switch to quickly select auto or manual focus.
The lens weighs 950 grams, which Sony says is ‘lightweight’.