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.