I’ve bought a sec­ond­hand Nikon 70-300mm f/4-5.6G for my D5100 but it won’t aut­o­fo­cus. Which bod­ies work with this lens? Niall Boyle, via email

NPhoto - - Nikopedia -

Jason says… Nikon ‘AF’ rather than ‘AF-S’ lenses don’t have built-in aut­o­fo­cus mo­tors. In­stead, they rely on a mo­tor built into the cam­era body to drive the aut­o­fo­cus mech­a­nism, via a screw in the lens mount. All FX (full-frame) Nikon DSLRs fea­ture a built-in AF mo­tor, as do higher-end DX (APS-C for­mat) DSLRs. His­tor­i­cally, these in­clude the D70, D90, and all D7XXX cam­eras.

Bod­ies that don’t have a built-in AF mo­tor in­clude the D40, D40x, D60 and all cam­eras in both the D3XXX and D5XXX se­ries. Un­less you’re plan­ning on buy­ing ad­di­tional lenses that rely on cam­era-driven AF, you’re bet­ter off re­selling your sec­ond­hand 70-300mm lens and up­grad­ing to the bril­liant 70-300mm VR (£430/$500), dis­cussed in the pre­vi­ous Q&A, which also in­cludes the bonus of Vi­bra­tion Re­duc­tion.

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