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Path: utzoo!utcs!lsuc!pesnta!hplabs!sdcrdcf!darrelj
From: darrelj@sdcrdcf.UUCP (Darrel VanBuer)
Newsgroups: net.rec.photo
Subject: Re: lens for view cameras
Message-ID: <1784@sdcrdcf.UUCP>
Date: Mon, 25-Feb-85 12:09:53 EST
Article-I.D.: sdcrdcf.1784
Posted: Mon Feb 25 12:09:53 1985
Date-Received: Wed, 27-Feb-85 09:58:44 EST
References: <163@rtech.ARPA>
Reply-To: darrelj@sdcrdcf.UUCP (Darrel VanBuer)
Distribution: net
Organization: System Development Corp. R+D, Santa Monica
Lines: 17
Summary: 

Angular resolution is proportional to the diameter of a lens.  Since longer
lenses are farther from the film, you do generally get fewer lines/mm (this
is true for long 35 mm lenses too).  In large format cameras, the loss in
resolution is more than made up for by the larger amount of film used by an
image.  A good 35 mm normal lens give close to 100 lines/mm, an 8x10 lens
maybe 25 to 30 lines for an average lens, so you go from 2500 lines/picture
to 5000 lines/picture.

-- 
Darrel J. Van Buer, PhD
System Development Corp.
2500 Colorado Ave
Santa Monica, CA 90406
(213)820-4111 x5449
...{allegra,burdvax,cbosgd,hplabs,ihnp4,orstcs,sdcsvax,ucla-cs,akgua}
                                                            !sdcrdcf!darrelj
VANBUER@USC-ECL.ARPA