I spent a few hours at the high school today (spring string concert), and since that is always a rather boring affair unless you are one of the participants, I brought some MF lenses and my D600 along. Low light all day, so I just turned it to auto-iso and fired away:
Starting out, all with the 20mm f3.5, handheld, set to auto-iso and f8
iso 360 f8 1/30s
iso 1100 f8 1/30s
close range - these critters are about 2-3\" tall, second one cropped a bit for framing (these were inside a glass case)