Yongnuo YN14mm 14mm F2.8N Ultrawide Angle Prime Lens Auto Focus Metal Mount for Nikon DSLR Camera

Features:

Ultra wide-angle prime is designed for FX-format Nikon F-mount DSLRs, however can also be used with DX models where it provides a 21mm equivalent focal length.
Bright f/2.8 maximum aperture suits working in difficult lighting conditions, benefits astrophotography applications, and also affords greater control over depth of field.
One ultra-low dispersion aspherical element and one anomalous partial dispersion element noticeably reduce color fringing and chromatic aberrations in order to achieve high clarity and accurate color rendering.
Two aspherical elements, including the UD aspherical element, and an ultra-high refractive index element help to minimize distortion and spherical aberrations for greater sharpness and accurate subject rendering.
Individual glass elements are multi-coated to resist flare and ghosting for improved contrast and color fidelity.
A DC motor is used for quick and accurate autofocus performance, and a dedicated switch lets you quickly change from AF to MF control. A focus distance scale is also featured to aid with pre-focusing techniques.
Chrome-plated metal lens mount is durable and accurate for a secure fit with the camera body, and gold-plated contacts help to ensure consistent communication between the lens and camera.
Seven-blade diaphragm contributes to a smooth bokeh quality.
A micro-USB port is located on the barrel of the lens to allow for updating the lens's firmware.