Just purchased this lens for $5.00 at a local estate sale - perfect condition. It is a 28-70 Kalimar Zoom Macro lens 3.9-4.8 for the MD/MC mount. Nice and compact lens. Anyone have any experience with this lens? Oh, by the way there was also a Minolta 50 1.7 also for $5.00 but I have that already as well as the 50mm 1.4. Wife was starting to growl so I put it back. I'll pop up some photos as I test it out.