Tamron SP 70-210mm f/3.5-4 Adaptall-2 52A I read in other online forum some one says this lens is comparable to Vivitar S1 90-180mm f/4.5 for close-up and up to 1:2 macro. Got me interested, and picked one up for cheap. Here are some test shots taken at a local rose garden. Lens info here http://adaptall-2.org/lenses/52A.html I'd say, get one while they are still inexpensive. But don't expect much for far away shot.