Originally posted by wwwmorrell Vivitar also sold "A" Extension tubes, 36-20 & 12mm, Model AT-23.
Luckily I picked up a set on eBay some twelve months back.
Be carefull though, they also sold I think the model AT-22 which do not have the A contacts.
Yeah, I just bought some AT-22's, which don't have the A contacts, but are still called "automatic," I guess 'cause they allow stop-down metering (read that on another thread).
I did buy some Kenko AF ones, but they didn't allow me to use live view with SDM lenses (might seem picky, but I wanted to use them with the DA*55), so I thought I'd send those back and go for plain "A" ones... but guess I messed that up too, since now I won't be able to control the aperture on DA/DA* lenses!