I bought a set of Pentax Automatic K mount tubes from a vendor on Ebay last year. NOS ... in box with case and all papers they were $65 or so. Automatic means that they operate the auto-diaphragm mechanism ... no electronic connection so all lenses operate as manual K-mount lenses do.

Godfrey

On Jan 24, 2006, at 9:58 AM, [EMAIL PROTECTED] wrote:

Anyone got some K-mount extension tubes for sale?  Cheap?
Uncoupled is fine.
I've got an experiment in mind.

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