Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: Notesfiles $Revision: 1.6.2.17 $; site uiucdcs.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!mhuxj!ihnp4!inuxc!pur-ee!uiucdcs!parker
From: parker@uiucdcs.UUCP
Newsgroups: net.rec.photo
Subject: Dingy colors...bad lens?
Message-ID: <20900009@uiucdcs.UUCP>
Date: Wed, 31-Oct-84 01:32:00 EST
Article-I.D.: uiucdcs.20900009
Posted: Wed Oct 31 01:32:00 1984
Date-Received: Thu, 1-Nov-84 04:39:01 EST
Lines: 19
Nf-ID: #N:uiucdcs:20900009:000:883
Nf-From: uiucdcs!parker    Oct 31 00:32:00 1984

I have been having problems with the performance of one of my camera
lenses.  I have a Sigma 28-80mm zoom lens for a Pentax ME Super.  I have
noticed that it consistently yields "dingier" pictures than my other
lenses (Pentax 50mm or Kiron 70-210mm zoom).  By "dingier", I mean that
the overall picture is darker and certain colors do not reproduce well.
For example, a yellow-gold color comes out gold-brown.

I was wondering whether this is a characteristic of the lens (Sigma
brand).  Or could it be that, because of the optics involved, wide
angle zooms respond in that manner?  I have a friend who has a
Vivitar wide angle zoom that yields similar results.

Are there any lenses that do not exhibit this type of problem?

Any info would be appreciated...thanks
 
                                            Paul Parker
                                            parker@uiucdcs