On Mon, Sep 16, 2013 at 06:10:43PM -0400, Ann Sanfedele wrote: > well I misunderstood that as well (check archives) just thought it > was a matter of semantics...
The hyperfocal distance for a particular focal length and f-stop is the distance to set the focus such that depth of field will allow infinity to be in focus. http://www.dofmaster.com/dofjs.html 35mm f/8 (16MP on an APS), hyperfocal distance is 25.2 feet. Subject distance 25.2 ft Depth of field Near limit 12.6 ft Far limit Infinity Total Infinite In front of subject 12.6 ft Behind subject Infinite Hyperfocal distance 25.2 ft Circle of confusion 0.02 mm Zone focusing would be setting your focus to 10 feet so that anything from 7' to 16' would be in focus: Subject distance 10 ft Depth of field Near limit 7.18 ft Far limit 16.5 ft Total 9.31 ft In front of subject 2.82 ft (30%) Behind subject 6.49 ft (70%) > > and frankly, whatever you call it, I certainly favor checking settings > and making them all manual for shooting from the hip, or out a window > of a moving train or bus. > > I'll skip the "walk toward ... " part of his lesson :-) > > ann > > > > On 9/16/2013 16:38, Larry Colen wrote: > >On Mon, Sep 16, 2013 at 03:38:35PM -0400, John wrote: > >>I kid you not! > >> > >>http://www.thephoblographer.com/2013/09/15/useful-photography-tip-68-using-a-manual-focus-lens-for-street-photography/ > > > >Heh! > > > >>From my experience with Chris, that reads exactly like something he'd write. > >Right down to misunderstanding the difference between hyperfocal distance > >and "zone focusing". > > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- Larry Colen l...@red4est.com http://red4est.com/lrc -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
