On Sat, 28 Dec 2002 06:04:04 -0000, "Bhup" wrote:

>My nikon AFn180m F2.8 ED-IF lens focus past inifinity, for years I was led
>to belive there was a fault with my lens.
>Which I have found to be a problem when using a manual focus body (F3). as
>I cannot move the lens to focus on infinity quickly. How ever a AF body
>presents no problems.
>
>Recently I was told by a friend this is to allow the lens to focus correctly
>using IR film and to allow for some sort of lens expansion due to temp can
>anyone confirm this ? or doe their long/short tele lenses do the same.

All Nikkor tele "ED" lenses "focus past infinity"
(a great concept! ;-) to allow for focus shifts
with temperature change...