RE: [Leica] Tri-Elmar and Depth of Field marks

["B. D. Colen" <bdcolen@earthlink.net>]

Turn the infinity mark on your lens to the right hand mark corresponding to
the f stop you're using...then look to see what distance matches up with the
left hand f stop mark...you are "in focus" from the left hand mark to the
right....
> -----Original Message-----
> From: owner-leica-users@mejac.palo-alto.ca.us
> [mailto:owner-leica-users@mejac.palo-alto.ca.us]On Behalf Of John Hudson
> Sent: Monday, June 14, 1999 10:43 AM
> To: leica-users@mejac.palo-alto.ca.us
> Subject: Re: [Leica] Tri-Elmar and Depth of Field marks
>
>
>
> -----Original Message-----
> From: Richard J. Wyble <rwyble@erols.com>
> To: leica-users@mejac.palo-alto.ca.us <leica-users@mejac.palo-alto.ca.us>
> Date: Monday, June 14, 1999 7:22 AM
> Subject: Re: [Leica] Tri-Elmar and Depth of Field marks
>
>
> >Excerpts from leica: 14-Jun-99 Re: [Leica] Tri-Elmar and D.. Martin
> >Howard@ikp.liu.se (657*)
> >
> >
> >> "Hyperfocal" means the point at which as much as possible will be in
> >> focus (i.e., maximum depth-of-field).  Since a great deal lies at
> >> infinity (and beyond ;) the hyperfocal distance is the distance which
> >> covers "infinity" and as much infront of "infinity" as possible.
> >
> >This I understand. My question therefore seems to be how does one
> >calculate or even estimate just what that "as much infront of 'infinity'
> >as possible" might really be?
>
> Shouldn't the question be posed as "how far in front of me does infinity
> start for any given aperture?" For example, using my 50mm Summilux, at f16
> the maximum depth of field is from 8 feet to infinity. At f11,
> maximum depth
> of field is from 12 feet to infinity. Judging this kind of short
> distance is
> relatively easy.
>
> jh
>
>
>
> >  rwyble@erols.com
> >  Richard J. Wyble
> >
> >
>
>