checking the obvious
As long as I was sitting in front of a 3D topo map with my DA 18-55, I figured I would see its 'best' supercloseup shot. In this case 'best' is still hand-held and focused manually, so not exactly a fair test - but the same rules applied to the Sigma 50 Macro that I put on after that. No surprise, no contest, and especially at the edges. The 18-55 is a versatile lens, and going to 0.3x is very convenient, but so is this small Sigma. Whatever lens I expect to be shooting, this mini macro lens is going to come along on my travels - a lot.