[Gremlin]

I’ve just re-read your post Taddy and I’d missed the bit where you said your lenses fit your sons DSLR.
In that case I agree with gpick that an adapter will not be needed.
Some lens have built in auto focus and others rely on motors in the body.
That’s the case with Nikon’s. All lenses fit all bodies but not all auto focus on older cameras.
They still work in manual mode though.