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From: bennison@clt.DEC (Victor Bennison - DTN 381-2156)
Newsgroups: net.rec.photo
Subject: Wide angle lens question
Message-ID: <174@decwrl.DEC.COM>
Date: Thu, 26-Dec-85 11:16:27 EST
Article-I.D.: decwrl.174
Posted: Thu Dec 26 11:16:27 1985
Date-Received: Sat, 28-Dec-85 01:20:34 EST
Sender: daemon@decwrl.DEC.COM
Organization: Digital Equipment Corporation
Lines: 25

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Thanks to the several of you who responded to my request for info on
Nikon lenses.  I ordered the 55mm micro and the 28mm f2.8.  I just
received them yesterday.  I'm curious about some things.  All my
Nikon lenses, the above mentioned and my 50mm f1.8 series E, exhibit
noticable pincushion (is that the right term?).  When I look at a long
straight line (counter-top, ceiling line), and try to put the line
exactly along the bottom of the viewfinder, it arches slightly into
viewfinder in the middle.  Is this normal?  I note that my Kiron
28-85 f2.8 when set at the 28mm setting exhibits NO noticable
pincushion.  Should I be really impressed with my Kiron?  I thought
Nikkor lenses were supposed to be great lenses.  Am I confused or 
what?  I do notice that the Nikkor 28mm is brighter then the Kiron at the
28mm setting.  Looking at the same scene at the same aperture setting, 
the Nikkor lets more light through according to my light meter.
Am I correct in assuming that f2.8 refers to the SIZE of the opening
and that the brightness is a function of how much glass is between the
light meter and the subject?  I also notice that the Nikkor 28 focuses
to very short distances.  In fact, with my Vivitar 2X macro teleconverter
and the 28mm Nikkor, I seem to be getting better then 1:1.

    				Vick Bennison
    				...decvax!decwrl!rhea!tools!bennison
    				(603) 881-2156