What type of lens will auto-focus on Nikon bodies without a focus motor?

Question

I know my D40 doesn't have a motor in it to auto-focus lenses.

What type of lens has the motor in it? How can I know which lenses will and will not work?

Answer 1

• Nikon with AF-I and AF-S

• Sigma with HSM (and older ones that list as "with motor for Nikon" or the like obviously)

• Tamron with USD (and older ones that list as "with motor for Nikon" or the like obviously)

• Tokina lenses specifically listing "built-in AF motor drive" as a feature

Answer 2

Nikon Lenses with the designation AI, AI-S, AF will not work on your camera. Lens zCodes can be found here:

http://www.dslrgeeks.com/forum/showthread.php?t=4

Answer 3

As you note, the D40 doesn't have an autofocus motor. Nikon's designation for the lenses that have the motor include the AF-I and AF-S lines.