Focus motors: In-body vs in-lens

Started Apr 15, 2013 | Discussions thread
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EKB
EKB
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Focus motors: In-body vs in-lens
Apr 15, 2013

Out of ignorant curiosity, what advantages (if any) are there to having a focus motor built into a lens rather than relying on the focus motor in the camera body?

Other than the obvious "will autofocus on entry-level bodies that don't have a focus motor" of course.

It seems obvious that putting a focusing motor in the lens will add to its cost and complexity. (Look at the price difference between Nikon's "D" vs "G" lenses.) Is the actual cost low enough for Nikon and other lens makers to routinely put a motor into all their new designs, just for the sake of "will work on a D5200 and below" - or is there some additional advantage that I'm overlooking?

 EKB's gear list:EKB's gear list
Panasonic Lumix DMC-FZ28 Nikon D90 Nikon AF-S DX Nikkor 18-105mm f/3.5-5.6G ED VR Nikon AF-S DX Nikkor 35mm f/1.8G Nikon AF Nikkor 50mm f/1.8D +1 more
Nikon D5200
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