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Old 10/15/2013, 08:40 AM   #103
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Join Date: Oct 2013
Location: Kansas City, Mo.
Posts: 46
Originally Posted by jhildebrand View Post
Looking at the Tamron 90 for my Nikon 5000 and I'm wondering what advantage is there to the one with the motor??? Some sites don't even list which version they're selling? I'm a DSLR newb and I'm stuck on this one. I thought the camera itself did the autofocus, so why would a lens need a motor?
The camera is just a box to hold film, or in the case of DSLR, a chip. The motors are in the lenses. That's why there are electrical connectors between the lens and camera body.

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