Archived from groups: rec.photo.digital.slr-systems (More info?
paul <email@example.com> writes:
> Michael Benveniste wrote:
> > On Sun, 02 Jan 2005 13:47:30 -0800, paul <firstname.lastname@example.org> wrote:
> >>What does 'IF' stand for on Nikon lenses?
> >>Mine just says ED but I don't see that described elsewhere.
> > Internal Focus. With IF lenses, the front element does not change
> > position while focusing. (The focal length does change, but that's
> > another story).
> Hmm so what difference does this make in the real world?
> I got a Nikon AF 28-200mm f/3.5-5.6G ED but when I google that all I
> see is the same thing with IF added. I didn't get a lense hood is the
> only difference I noticed. The lense does not rotate when I focus, did
> they just forget to print IF on it?
The non rotating while focussing is a complete red herring. It is
solely about whether the lens assembly changes length.