The Sony 50mm f/1.4 Carl Zeiss Planar T* ZA Lens is a
normal-length prime lens that is compatible with both full-frame and
APS-C-sized image sensors. This lens' construction integrates two
glass-molded aspherical elements within its design to provide high image
quality while reducing distortions and aberrations. The Carl Zeiss
optics work to produce a rich image quality, and its planar design helps
to improve overall image sharpness due to its flat reproduction
characteristics with minimal field curvature. Additionally, extra-low
dispersion (ED) glass is used throughout to further minimize chromatic
aberration and aid in producing even sharpness across the image plane. A
Carl Zeiss T* coating is applied to lens elements, too, to help reduce
lens flare and surface reflections on individual elements.
In regard to focusing and handling performance, this lens utilizes an
SSM (Super Sonic wave Motor) to produce quiet and smooth focusing that
is ideal when working with video applications. A focus hold button and
DMF (Direct Manual Focus) functions aid to this lens' manual focusing
abilities, while the rear-focusing design and incorporation of a focus
ring that does not rotate while in AF mode are specifically engineered
for more efficient AF usage.
The optical design of the lens is housed within a metal lens barrel that
offers both durability and rigidity while also providing drip- and
dust-resistance for use in inclement conditions.