Or they could just have the shaft go into a simple sensor that
controlled the USM.
Steve Jolly wrote:
Pål Jensen wrote:
If USM is included it means that it won't AF on older bodies.
Couldn't Pentax use an automatically-disengaging clutch (like they use
for manual focus on most of their newer AF lenses) to couple the
old-style mechanically-coupled AF to a new USM system? That way it
wouldn't slow down the USM system when it wasn't being used.
S
--
Someone handed me a picture and said, "This is a picture of me when I
was younger." Every picture of you is when you were younger. "...Here's
a picture of me when I'm older." Where'd you get that camera man?
- Mitch Hedberg
