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Thread: Autofocus motors in cameras and lenses

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    Member super duper's Avatar
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    Autofocus motors in cameras and lenses

    I have a D3000. As I understand it, this camera doesn't have an autofocus motor and I must buy lenses with AF-S in the tittle (the "S" meaning the lens has an autofocus motor).

    I am noticing there is a massive price difference between AF lenses and AF-S lenses.

    I am assuming the fastest autofocas would be if you have a motor in both the lens and the camera?

    Is this true, and is there anything else I am not taking into account?
    Last edited by I @ M; 13-01-2011 at 3:27pm. Reason: Fixed typo in thread title.

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    Moderately Underexposed I @ M's Avatar
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    In point form.

    The D3000 must have AF-S lenses in order for autofocus to work. The camera will work perfectly fine with manual focus lenses that have a CPU chip also. The camera will not acheive autofocus with AF-D lenses.

    The price differences have factors other than just the difference between AF and AF-S. There are some very expensive AF lenses and some very inexpensive AF-S lenses.

    Only one type of focus is working at any one time. A camera body with an inbuilt focus motor will only operate an AF-S lens by the motor built into the lens.

    There are a few things that you are not taking into account and you will probably need to d a little study initially to get it clear in your own mind as to which lens is which and does what but there are a few people on here that will happily help you with your queries.
    Andrew
    Nikon, Fuji, Nikkor, Sigma, Tamron, Tokina and too many other bits and pieces to list.



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