The Zeiss Distagon T* 21mm f/2.8 ZF.2 is a super wide-angle manual focus lens for Nikon F-Mount cameras.
The Carl Zeiss T* anti-reflection coating ensures the exceptional
colour control Zeiss lenses are known for, and its wide aperture is
suited to working in low-light, while offering precise focus control. It
uses an F bayonet (Nikon) lens mount, and is ideal for landscape,
architecture, portrait, group, and commercial photography.
The new ZF.2 lenses are an enhanced version of ZF lenses. They
feature an electronic interface (CPU) that enables support of all
important camera operating modes such as shutter priority, aperture
priority and programmed auto exposure or manual exposure settings.
Photographers no longer have to set the parameters in the camera menu
as the lens now transmits standard data such as focal length, speed and
the aperture setting to the camera. This data can then be viewed in
the EXIF data of each picture. The ZF.2 lenses also have a mechanical
lock on the aperture ring to lock the aperture ring at the lowest
setting and prevent unintentional adjustment while taking pictures.