I have a fairly uncommon Pentax Helicoid extension tube for K mount. It is a variable extension tube to permit different levels of magnification. It can go up to life size with a 55mm lens. Fully manual. Includes original case.
I used it mostly with a 50mm lens though also with a 28mm. Now that I have a dedicated macro, it's not really useful to me, perhaps to someone else. Also a very fine collector's item in collector's condition.
$100CAD + s/h. Open to offers.
Last edited by jslifoaw; 09-29-2007 at 10:40 AM.