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Message: <blockquote data-quote="evan447" data-source="post: 195249" data-attributes="member: 13572">why not do a bit more research on the nikon, i am sure it also breathes a little at minimum distance. the new sigma 105 os is a cracker by all accounts, rated a little better than the 105vr nikon by most reviewers. using the sigma with the d7100 may require you to manually switch off preview on the lcd after viewing. (a minor system glitch between sigma os lenses and the d7100), but a very fine lens nonetheless.if you are into bugs i would look for a used, non os copy of the 150mm sigma and use the money you save for a sigma 1.4tc. an excellent combination. best used with a monopod though!</blockquote>