Archived posting to the Leica Users Group, 1999/07/09
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I have to disagree. The greater the spherical or chromatic aberration, the larger the acceptable coc, so a greater percieved DOF. Since Leica glass is well corrected in these aspects, it is nothing to worry about. /Peter Jim Brick wrote: > > Every lens, except some zooms and I think the Tri-Elmar, has DOF info, for > that lens, engraved on the lens itself. The instruction booklet or most > photo texts also tell how to read this engraved scale. Aberrations aren't > involved. Lenses of the same focal length and at the same f/stop, at the > same distance, have the same DOF. > > Jim > > At 10:11 AM 7/9/99 -0700, you wrote: > >Mikiro Mori wrote: > >><snip> > >> I am beginning to understand better....@@; > >> So, DOF is calculated on the assumption that the lens has no abberations. > >> That's why we sometimes feel that lenses with the same focal length and f > >> stop (but with different abberations) give apparently different DOFs. > >> > >> Mikiro > >