I saw this lens today for a little over $400 - Minolta AF 100mm f2.8 N macro lens and wonder if it would work with an a-mount adaptor. I'm looking to get a macro lens that isn't very expensive but will get closer shots at more of a distance than my SEL30M35. This is my first camera that's not a Point 'n Shoot; lots to learn. I've read a lot of good information on this forum and would love to get the Sony 100mm but can't really justify that much expense at my current level of skill. Any advice appreciated!