14mm is a good size focal length for widefield nightscapes.
The normal choices are 14-24mm Nikon zoom, Samyang 14mm F2.8 and new to the market the expensive $3000 + Zeiss 15mm F2.8.
Surprisingly there seems little incentive to get the Zeiss.
Its more between the Nikon and the Samyang. The Samyang is $400 or so and the Nikon $2000.
http://3d-kraft.de/index.php?option=...enses&Itemid=2
Greg.