Re: [OM] Re: ( OM ) Was megapixel madness

[Winsor Crosby]

> on 9/14/02 2:27 PM, Brian Swale at bj@xxxxxxxxxxxxxxx wrote:
>
> >  Winsor Crosby wrote:, forwarded by Moose
> >
> > >  It is well known that 35mm lenses are sharper than medium format and
> > >  large format lenses.
> >  Hi folks; not necessarily true.  The Zeiss Sonnar 250mm SuperAchromat CFi
> >  lens for Hasslefree is reputed to be the sharpest lens in current 
> > production;
> >  capable of delivering 600 (I think it is, should look it up) lines per (
> >  mm/inch I
> >  need to look up again). This topic came up about 9 months ago when we
> >  talked over the maximum detail that film could record.  Whether it is lines
> >  per
> >  mm or inch, it is still away better than any lens most people have. And it
> >  should be possible to fit it to an OM body.
> I remember that... probably should be 600lp/mm, because 600lp/inch is only
> about 40lp/mm, which isn't all that impressive. I remember seeing somewhere
> that the typical Pen F lens was capable of pretty impressive resolution,
> something like 80lp/mm or more... the supposed need to provide more
> resolution due to the smaller film format resulted in some pretty
> high-quality designs.
> --
>
> Jim Brokaw
> OM-1's, -2's, -4's, (no -3's yet) and no OM-oney...
Unfortunately none of this makes any sense. Since 80 lines per mm is 
generally considered to be superb lens resolution I really doubt that 
Zeiss has discovered some alternative physics that produces 8 times 
the resolution of the best of any other manufacturers product.
There are 25.4mm per inch. 600 lines per inch would convert to 23 
lines per mm which is not really good by anyone's standard.  However 
it would probably put a nice image on large format film.
Maybe you guys need to double check things?  :-)
--
Winsor Crosby
Long Beach, California


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