The DA 15 is a very capable lens up close and a stopped down shot will still look very good in distances closer than the official minimum. Adjustments for FF/BF shouldn't change the minimum focus distance of the lens. The DA 15 has great DOF. I know that nobody else has ever done this
but I once forgot my camera was set on MF and just walked around at a party taking pictures and not really noticing that my AF was not working. Lucky for me, I had the DA 15 on the camera and almost all my shots were keepers.