The Sony SAL 50mm f2.8 Macro is a compact macro lens for Sony Alpha and Minolta Maxxum SLR cameras- it's not compatible with Sony Alpha mirrorless cameras unless you put it on an adapter (not included). But if you have a Sony or Minolta Maxxum SLR, this is a pretty sweet lens: not much larger than a standard 50mm lens, but with life-size magnification built in. In excellent condition, with clean glass and good function.