It may just be cleaning residue on the surface. However, it sounds like a condition I have seen on a few 100mm/4 macros: the front lens elements come unglued at the edge, and the resulting air gap causes a change in appearance when looking at the front of the lens . . .
stan > From: "Brent Hutto" <[EMAIL PROTECTED]> > Reply-To: [EMAIL PROTECTED] > Date: Mon, 17 Dec 2001 18:22:51 -0500 > To: [EMAIL PROTECTED] > Subject: Re: Any Advantage to SMC 24/2.8 over SMC-FA* 24/2? > > On 14 Dec 2001, at 20:19, Brent Hutto wrote: > >> I have a "Bargain" quality SMC 24mm f/2.8 lens on order from KEH. >> It will be my first wide angle lens and I'm a bit surprised at how >> expensive Pentax wide-angle prime lenses seem to be. For nearly >> $200 I'll expect my "Bargain" to be optically perfect. If not, I'm >> prepared to swap it for an "Excellent" condition example of the same >> model. But therein lies my question. > > I received my 24/2.8 today. When I first took it out of the box I > thought they had made a mistake and sent a "LN-" instead of "BGN" > one. It is absolutely immaculate in that you can't tell that its mount > has ever been on a camera and there isn't a single speck of dust > that I can find. > > I finally found the source of the Bargain status. If I look at the front > element at a certain angle with a bright light over my shoulder, there > is a discoloration covering about 1/3 of the element from the center > to nearly the top edge. It looks like the shimmer left behind if you put > too much cleaning solution on a piece of glass and let it air dry. > > Any idea what this is? I can't see it with the lens mounted on the > camera or by looking through the lens with it sitting on my light box. > Maybe I won't be able to tell until I run a roll of film through it. > - > 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 . - 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 .
