On Tue, 04 May 1999 11:09:15 -0700, George M. Anderson wrote:
>Look at the focus ring and the lens flange. The flange has F/#s on it,
>focus ring distances. If you focus on infinity, there will be some
>distance in the foregroud after which objects out to infinity will be in
>focus. Eg: Zuiko 50/1.8: when focussed to infinity with lens aperture
>set at F/8, acceptable focus is from 10m to infinity. But if aperture is
>set to F/16, the close limit moves to 5m. But, look what happens if you
>set the focus to 10m and aper to F/8. Now the flange marks indicate
>acceptable focus from 5m to infinity, same as F/16 above! Very useful
>to use this method for max depthe of field. Method is called
>'hyperfocal.'
Just how accurate are lens markings? I notice that on my 200/5 that
the hyperfocal distance at f16 looks to be 150yds judging by the
lens markings. But according to the hyperfocal calculator at
http://www.frii.com/~mbaltuch/HyperFocal.html, the hyperfocal
distance for f16 should be 83.33 yards. Which should I trust?
BB
-
B.B. Bean - Have horn, will travel
bbbean@xxxxxxxxxxxxxx
Peach Orchard, MO
http://www.beancotton.com/bbbean.shtml
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