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<blockquote data-quote="evan447" data-source="post: 140306" data-attributes="member: 13572">[ATTACH]33549[/ATTACH][ATTACH]33550[/ATTACH][ATTACH]33551[/ATTACH][ATTACH]33552[/ATTACH][ATTACH]33553[/ATTACH]i own the 105mm af-d micro nikkor and yes, it does extend when you focus at minimum distance but nowhere near as much as the tamron 90mm.the tamron almost doubles in length! the nikon increases its length by about a quarter.when shooting at more normal distances neither extend.the newer vr version of the 105 nikon is said to suffer more when stopped down than the older af-d. vr is not that effective at macro distances and it is a lot bigger and heavier.both nikons &quot;breath&quot; when close focusing.the newer sigma 105 os if does not extend and equals/betters the nikon but has a similar price tag.another lens worth checking out is the sigma 150mm macro. (the non os version). my fave macro tool, works rather well with the sigma 1.4 tc too.</blockquote>

[QUOTE="evan447, post: 140306, member: 13572"] [ATTACH=CONFIG]33549._xfImport[/ATTACH][ATTACH=CONFIG]33550._xfImport[/ATTACH][ATTACH=CONFIG]33551._xfImport[/ATTACH][ATTACH=CONFIG]33552._xfImport[/ATTACH][ATTACH=CONFIG]33553._xfImport[/ATTACH]i own the 105mm af-d micro nikkor and yes, it does extend when you focus at minimum distance but nowhere near as much as the tamron 90mm. the tamron almost doubles in length! the nikon increases its length by about a quarter. when shooting at more normal distances neither extend. the newer vr version of the 105 nikon is said to suffer more when stopped down than the older af-d. vr is not that effective at macro distances and it is a lot bigger and heavier. both nikons "breath" when close focusing. the newer sigma 105 os if does not extend and equals/betters the nikon but has a similar price tag. another lens worth checking out is the sigma 150mm macro. (the non os version). my fave macro tool, works rather well with the sigma 1.4 tc too. [/QUOTE]

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