Nikon DSLR lenses* which are not DX are FX by default... technically, the 28-70 is never a 42-105, its just that on a DX camera it covers the same angle as a 42-105 lens would... but yes, the 28-70 on FX covers the angle of 28-70 on a film SLR...Does it mean that if I have a non-DX lens like 28-70mm f2.8 on the new FX D700, I will have 28-70mm and not 42-105mm ?
Why Nikon want us to buy FX lens ? I'm very new to Photography. Please advise.
*Nikon F-mount lenses for nit pickers out there...;p