Nikon today announced the AF Nikkor 14mm f/2.8 ED lens which they're aiming at photojournalists using the Nikon D1. Because of the D1's focal length multiplier of 1.55x this lens works out at a nice wide 21.7 mm on the D1. There's also a gelatine filter holder at the rear of the lens.

AF Nikkor 14mm f/2.8 ED lens specifications

Offical Nikon announcement:

Nikon Corporation proudly announces the new AF Nikkor 14mm f/2.8D ED. This high-performance ultra-wideangle lens is ideal for photojournalists - especially useful with Nikon's Professional Digital SLR D1 (the lens' effective coverage will be equivalent to using a 21mm on 35mm [135] film format).

This new lens offers superior optical performance by ED (Extra-low Dispersion) glass and aspherical lens elements and it represents a significant addition to the professional Nikkor lens lineup - offering serious photographers enhanced shooting flexibility for a range of applications.

Features

• 14mm ultra-wideangle lens
  
• Used as 21mm (converted to 135 [35mm] format) lens when attached to the Nikon D1
  
• One ED glass and two aspherical lens elements for superior image quality
  
• High-performance Nikon Super Integrated Coating offers superior colour reproduction and minimises ghost and flare.
  
• A/M switch provided