Before I bought my 105Micro nikkor (with vr) i read reviews on that class of micro lenses. Although most said the Sigma won out in sharpness even over the Nikkor (at over f/11), I went with the nikon because I had one before using with my F4 & F100 film bodies. I don't remember the specific magazines, but I noted that ONE of them gave the sharpness rating over the Sigma. has anyone here seen the same articles and/ratings ? Seems strange that ALL EXCEPT ONE hailed the Sigma as king over the Nikkor. Wonder why???