Tokyo's Map Camera this morning is advertising an upcoming compact 20mm lens from Voigtländer. The Color Skopar 20mm ƒ/3.5 SL II Aspherical in Nikon AIS and Pentax KA mount is slated for release on February 28th. It's a little more than an inch long (29mm) and weighs 7 1/4 oz. (205 g). Price TBA.
(Thanks to Oren and Eolake)