You're right. Kind of useless for the most part. BUT, I'd like to have them for my A 400, so I could use an extension tube and still get high speed synch. Without lens info, the Sigma 500 can't do high speed synch. Paul
> More sort of aren't, really. The dealer finally got a set in today, and > the outside of the box said "Pentax (AF)". Inside was a note saying "Note: > use manual focus mode". > > The tubes don't have the driveshaft needed for the camera to move the > lens, so autofocus just whirs until it concludes something is wrong. In > manual focus mode, you still get a beep when focus matches. > > I declined to purchase, on the grounds they didn't do anything that a > plain set of K-mount tubes couldn't. OK, you get to have lens info > embedded in the pictures, but that isn't worth the money. > > -- > PDML means I get more e-mail than spam! >
