F nothing more than the ratio of the opening in the
lens to the focal length. You are confusing this with
actual amount of light transmitted by the lens they
are related but not the same F = (Diameter of
opening)/(Focal Length).
--- "Alexandre A. P. Suaide"
<[EMAIL PROTECTED]> wrote:
> Hello
>
> f/.95 ???????
>
> I don't know if I am wrong but sometime ago I think
> I
> read that the f-stop is related to the amount of
> light that is transmitted to the film. f-4 means
> 1/(4*4) of the
> input light is transmitted. So, if we have f-.95 it
> means
> that we "create light" because we have more light
> transmitted
> than the incident one. Is it right?
>
> Alex
>
>
> Peter Alling wrote:
> >
> > That's in their current lineup. I remember
> reading
> > somewhere that Leitz at one time had a f/.95,
> don't
> > remember what the focal lenght was. Must have had
> a
> > huge front element. (Ok it might have been a
> > different manufacturer, you know how it is when
> you're
> > getting old).
> >
> > --- dosk <[EMAIL PROTECTED]> wrote:
> > > I know that Tamron makes lenses to fit k-mount
> ZX
> > > cameras.
> > > But what then does a Tamron k-mount Adaptall do?
> > > Allow me to fit Leica,
> > > Nikon, Minolta lenses onto a k-mount??
> > >
> > > I doubt I could ever afford any Leica lenses.
> > > (Lottery?)
> > > But oh baby, they have a 50mm 1.0!!!!
> > > Say goodbye to flash forever!
> > > (Not that I use it now, mind you.))
> > > Skip
> > >
> > > -
> > > This message is from the Pentax-Discuss Mail
> List.
> > > To unsubscribe,
> > > go to http://www.pdml.net and follow the
> directions.
> > > Don't forget to
> > > visit the Pentax Users' Gallery at
> > > http://pug.komkon.org .
> > >
> >
> > __________________________________________________
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> --
>
-----------------------------------------------------------------------
> Alexandre A. P. Suaide, Ph.D.
> mailto:[EMAIL PROTECTED]
> Physics Department
> University of Sao Paulo - Brazil Phone:
> 1-313-577-5419
> Wayne State University - MI -USA ICQ number:
> 78139605
>
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