f/4, Sigma 18-50 2.8 macro mounted on Olympus E-510 at 50mm. I believe someone asked what the macro capabilities of the so-called 1:3 "macro" really were. This was just barely not quite at full macro, more like .7ft as opposed to the .62ft minimum, but you get the idea. You could get a tiny bit closer. The flower is about 1.5" in diameter.