Originally Posted by Matjazz 
TTL flashes work on DS with auto lens. I've tested it with AF220T and soligor 42 DA
Originally Posted by Ole You had a lucky day. The Ds does not have the extra light meter sensor which is a necessity for TTL flash support.
Yup...
According to page 153 of the manual, the external flash attempts TTL with M and K lenses. Incorrect exposure may occur near min/max aperture values.
Since the camera itself has no TTL sensor, the built-in flash is useless on M and K lenses (unless you're lucky)!
Despite all this techncal talk, some combinations may still work
