This is disclosed from an interview with the senior officials of the Pentax Imaging, at the recently held New York PhotoPlus Expo:-http://enticingthelight.com/2010/11/01/speaking-to-pentax-at-photoplus-expo-in-new-york/Quoted:-DC is a new type of in-lens focusing motor that’s intended for consumer lenses. DA* lenses will incorporate the higher grade SDM focusing.Going forward, all DA lenses
