[Leica] Re: Should len's infinity marking really be infinity?

[Jim Brick <jim@brick.org>]

You have to be careful about distances. To test your RF for infinity focus,
you should pick a large object, at least a mile away. Such as a radio tower
on a distant hill, or far away water tower. Skyscraper in a distant city.
Infinity, of course, is non existent. But your RF should put your lenses,
on the infinity stop, with very distant objects. A few hundred feet away is
not enough. Test at three thousand feet (1000 meters) or farther.

So how far away was your test subject?

Jim


At 11:11 AM 3/13/99 +0800, you wrote:
>Hello Everyone,
>
>Excuse me for asking such a dump question.
>
>When I set my lens to the infinity mark and look at far away subject, I
>noted that some lens are focused at beyond infinity.  (The split image
>does not match, as if it is focused at a point further than the
>subject.)  Is this normal?
>
>Thanks for your advices.
>
>
>Best regards
>Ben
>