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Re: [OM] 90mm macro question

Subject: Re: [OM] 90mm macro question
From: Larry <Halpert@xxxxxxxxxxxxx>
Date: Mon, 07 Jan 2002 18:58:01 -0500
I don't own both lenses, but having borrowed the zuiko, and put it through its
paces, I find it financially much healthier to have much less money in my Tokina
with its 1:1 glass element extender, and super performance. Photodo also finds
it better.

Larry

Olympus wrote:

> Larry, do you have both lenses?  I am a little bit (and pleasently)
> surprised that my Tokina is said to be sharper than the Zuiko.  The Tokina
> 90mm is one of my favorite lenses..  I was always brainwashed that 3rd party
> lenses are not as sharp as OEM's...
>
> Albert.
>
> ----- Original Message -----
> From: "Larry" <Halpert@xxxxxxxxxxxxx>
> To: <olympus@xxxxxxxxxxxxxxx>
> Sent: Monday, January 07, 2002 1:20 AM
> Subject: Re: [OM] 90mm macro question
>
> > Those results corroborate my experience as well.
> >
> > Larry
> >
> > Olympus wrote:
> >
> > > >From the archives, I found this from John Williams...
> > > ~~~~~~~~~~~~~~
> > > At macro resolution (1:2)
> > > Olympus 90mm f2                         Tokina 90mm f2.5
> > >         l/mm /(contrast% 30 l/mm)       l/mm(contrast)
> > > f       center  corner          f       center  corner
> > > 2       40/(30) 36/(25)
> > > 2.8     45/(47) 36/(30)         2.5     64/(55) 57/(49)
> > > 4       45/(69) 36/(43)         4       72/(67) 64/(54)
> > > 5.6     45/(68) 40/(45)         5.6     81/(68) 72/(59)
> > > 8       51/(60) 40/(50)         8       81/(62) 72/(60)
> > > 11      45/(54) 40/(42)         11      64/(62) 57/(55)
> > > 16      40/(48) 36/(40)         16      51/(52) 40/(52)
> > > 22      40/(33) 36/(27)         22      45/(45) 32/(42)
> > > 32      -       -               32      36/(31) 29/(24)
> > >
> > > At 1:4, the Tokina resolution numbers increase even more relative to the
> > > Olympus.
> > > ~~~~~~~~~~~~~~
> > >
> > > Now I have the Tokina 90mm f.25, and I was wondering if someone had
> both,
> > > and can really compare if these numbers are anywhere close?
> > >
> > > Also, a question I've been dying to ask, how do you calculate lines per
> mm??
> > > I mean, take a microscope to the film??
> > >
> > > Albert
> > >
> > > < This message was delivered via the Olympus Mailing List >
> > > < For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
> > > < Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
> >
> >
> > < This message was delivered via the Olympus Mailing List >
> > < For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
> > < Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
> >
> >
>
> < This message was delivered via the Olympus Mailing List >
> < For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
> < Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >


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