Rumors are swirling that Voigtlander will soon release a 20mm f/3.5 lens for the Nikon mount.  Rumored specs are as follows:

• Expected Release Date: February 28, 2009
• Focal length: 20mm
• Angle: 94 degrees
• Relative aperture: 1:3.5
• Minimum aperture 6 of 9 pieces: F22
• Minimum focusing distance: 0.2m
• Number of diaphragm blades: 9 pieces
• Weight: 205g
• Maximum total length × diameter: 63 × 28.8mm
• Filter size: 52mm
• Mounting: Ai-s

[DPR forum via mapcamera.com] I’m questioning the release date, and as a result, the source, a bit.  February 28 is a Saturday.