[RWebb]

also, it might matter if your lens has been "AI'd" by a 3rd party - some of mine have

i.e. converted to an AI lens vs. being made that way by Nikon

I thought nikon.com had the charts...

for sports or wildlife photos, the older lenses suddenly become - and I steal from Sarah Palin here - more telphoto-ey when using a DX body