Originally posted by Bunch I shoot a lot of macro, and having a lens that goes 1:1 natively, without using tubes or coupling lenses, has been a lot more enjoyable for me. I will always keep the A 100 to use as a coupler when I want to go beyond 1:1, since the DFA has no aperture ring and can't be coupled effectively. Unless Pentax ever makes a lens like the Canon mp-e, but I doubt that will ever happen. But by itself the DFA out resolves the A100f4. I can't crop down as far and get the sharpness I get with DFA, and the rounded aperture blades make for great bokeh. Plus, ya know, WR. The cost was worth it to me.
I can see the sharpness in that cropped photo of the robber fly. I shoot a lot of macro also, I have a Vivitar 55 2.8 macro that does 1:1 natively, and it's a really nice lens. I also have the M-50 f4, a nice lens but it's 1:2 also. The Vivitar does most of my 1:1 stuff, but the working distance is small. If I need more distance I'll put a 50mm tube on the 100 and get 1:1.