I've played with a couple USM/AF-S macro's. The only working advantage is that you can leave them in AF mode and override the camera's focusing decisions. Which the D-FA lenses already allow.
-Adam Thibouille wrote: > I think a macro would benefit of it. Usually a macro lens as a long > (sometimes very long) focussing ramp (for obvious reasons). In this > case, if SSM is supposed to be faster, then yes it would benefit a > lot. My SMC 100/3.5 macro which I quite like is difficultto be used as > a "normal" lens because of very slow focussing, simply because the > time it takes to turn the whole focussing thing is huge. > > BTW I find an FA 50/1.4 should benefit of it, it also has quite a long > focussing ramp. > > > Thibault Massart aka Thibouille > ---------------------- > *ist-D,Z1,SuperA,KX,MX, P30t and KR-10x ;) ... > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
