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Sigma 400mm f5.6
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<blockquote data-quote="aroy" data-source="post: 365609" data-attributes="member: 16090"><p>I think it is a non AF-S version, so you need a motor in body for AF. Here is a discussion I found</p><p><a href="http://www.birdforum.net/showthread.php?t=80557" target="_blank">SIGMA 400mm AF f5.6 APO - BirdForum</a></p><p><a href="http://stormpetrel.com/wpblog/?tag=sigma-400mmf5-6-apo-hsm-macro" target="_blank">Sigma 400mm/f5.6 APO HSM Macro | Stormpetrel's blog</a></p><p></p><p>The Nikon 300mm F4 + TC 1.4 achieves the same FL, but has inbuilt motor and is generally better build and IQ.</p></blockquote><p></p>
[QUOTE="aroy, post: 365609, member: 16090"] I think it is a non AF-S version, so you need a motor in body for AF. Here is a discussion I found [URL="http://www.birdforum.net/showthread.php?t=80557"]SIGMA 400mm AF f5.6 APO - BirdForum[/URL] [url=http://stormpetrel.com/wpblog/?tag=sigma-400mmf5-6-apo-hsm-macro]Sigma 400mm/f5.6 APO HSM Macro | Stormpetrel's blog[/url] The Nikon 300mm F4 + TC 1.4 achieves the same FL, but has inbuilt motor and is generally better build and IQ. [/QUOTE]
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