Sony Carl Zeiss Planar T* 50mm F1.4 ZA Lens for Digital SLT and NEX Cameras

Key Features

• Quiet and smooth AF: Autofocusing is smooth and quiet, courtesy of a Super Sonic wave Motor. Excellent focusing performance includes a focus hold button, a focus ring that doesn't rotate during AF operation, a Direct Manual Focus function, and a rear-focus system that maintains the same length during autofocusing.
• Dust and drip resistant design: The main drive unit is sealed with rubber packing, etc., to realize ample dust and drip resistance as a system when mounted on a camera to withstand tough usage in harsh environments.
• High-grade metal body: The high-grade lens body is constructed of aluminum that offers both high rigidity and an attractive finish that contributes to pride of ownership.
• Carl Zeiss Planar Lens: The Carl Zeiss Planar lens first became synonymous with high-performance lenses by realizing a large aperture, flat reproduction characteristics, and the successful removal of astigmatism.
• Carl Zeiss T* Coating: Coated optics were pioneered by Carl Zeiss -- and this superb lens features T* (T-Star) coating that virtually eliminates the lens flare, internal reflection and light scattering that can otherwise occur at glass-to-air surfaces.
• Superior Large-Aperture Performance: Like other large-aperture Carl Zeiss lens designs, this f1.4 lens is simply magnificent in its ability to capture brilliant high-resolution images in low-light conditions requiring fully open aperture.
• SSM (Super Sonic wave Motor): Designed for fast, smooth, silent automatic focusing, this unique technology achieves high torque at low speed with rapid start/stop response. It operates through the ability of a piezoelectric device to reshape itself quickly when voltage is applied.
• Glass-Molded Aspherical Lens Elements: These precision lens elements correct distortion for sharper, more visually accurate images.
• ED (Extra-low Dispersion) Glass: Because light of different wavelength (or color) bends at different angles when it passes through a lens, ED (Extra-low Dispersion) Glass is used in Carl Zeiss lenses to eliminate chromatic aberration by correcting certain wavelengths of light