Re: Macro Extension Tubes

[Joseph Tainter]

"I have the Vivitar AF set which supports ALL functions necessary for 
automatic aperture control and autofocus just like the "A" lenses."

Christian, could you clarify which Vivitar set you have, and how one 
finds them? The only Pentax AF extension tubes I am aware of are the 
Kenko Teleplus extenders in 12 and 25 mm. lengths.

Oh...weren't there some Vivitar tubes that also contained glass? Do you 
have these?

Thanks,
Joe