| http://www.w3.org/ns/prov#value | - Optically, you are right, however, if you put e.g. a 18-105 DX lens on a D700, most of the picture will show serious (completely black) vignetting, so you will have to crop the picture to arrive at a non-vignetted image, so the effective angle of view is reduced, so the effective focal length is increased.
|