http://rahrahgear.com/News/pentax-announces-d-fa-645-55mm-f2-8-lens/ In conjunction with its announcement of the 645D medium format camera, Pentax has announced the smc D FA 645 55mm F2.8 AL[IF] SDM AW lens. First in the D FA 645 lens series, this weather-resistant prime lens features a Supersonic Direct-drive Motor (SDM) autofocus drive and Quick-Shift for instant AF/MF switching. It is also the company's first 645 system lens to incorporates a rounded diaphragm.T... Tue, 16 Mar 2010 19:39:37 CDT en