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Originally Posted by jammie*dodger
So do Nikon ensure that older Sigma, Tamron, Tokina, etc (NAF) lenses work on their newer bodies then? If so I could be tempted to defect next time I wnat to upgrade my camera body.
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Why should it be up to Nikon or any camera manufacturer to ensure third party lenses work? The thrid-party companies have a responsibility too.
All NAF designated lenses will physically fit onto a Nikon/Fuji body (and work to some extent, even very old manual lenses)... but there's more to it than that with advanced metering systems using the lenses, as well as various AF issues. So not all the modern advanced functions of a camera will work with all lenses.
Lenses are no longer simply bits of metal and glass, they are complicated electronic devices in their own right.
cheers,
Andy