My venerable Sigma 150mm f/2.8 EX DG IF HSM  macro (to use its full, slip off the tongue, title) virtually lives on a Nikon D7100 body.  For over a decade, it has seen heavy use and I am continually amazed by the detail I have been able to squeeze out of it.   There really cannot be a better endorsement than that from a confirmed macro fanatic whose search for sharpness is akin to a personal quest for the Holy Grail. I first wrote a paen of praise for this lens…