I currently own two micro (or macro) lens: a Macro-Takumar 50 f/4 and a Micro-Nikkor-P, 55 f/3.5. Both of these have small objective lenses, for a 50, and both are recessed so far into the mount that I really don't think I need a lens shade with either one, unless I point it direct AT the sun.

So, here's my question: what demands are made on the optics for the micro/macro lens? I don't find this arrangement on any of my other 50s, and I'm sure there is a very good optical reason for the small, recessed lens (at least it looks small and recessed to me.) So, can anyone tell me what's up? I'm curious.

Thanks to all who reply.

With best regards.