Archived posting to the Leica Users Group, 2001/03/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]i have a 50mm2.8 elmar that has some discoloring on the front coating. never had a problem with it though, works great. i know Focal Point will recoat some lenses. chris williams - ----- Original Message ----- From: "Dr H L Lau" <shllau@zdnetonebox.com> To: <leica-users@mejac.palo-alto.ca.us> Sent: Wednesday, March 14, 2001 6:02 PM Subject: [Leica] Re: Lens coating > Hello all, > > Could you please help me on this? > > I have a 50mm Summilux (no. 166xxxx) M-mount, probably made in 1959, which I bought used some time ago. One day when my friend looked at this lens, he said it had something weird about its coating. The > reason he gave is that when you look at the reflected images from the lens surface under a lamp, the series of reflected images are coloured (which is normal) but one of them in the middle of the series is > not coloured (white if you look under a fluorescent lamp, which he said is abnormal and shows a coating problem or re-coating). > > The lens works beautifully, with no flare or ghost images (well, I did not shoot at a light source). > > Is there really a coating problem? Or is it "normal" for a Summilux of this vintage? I've looked into Laney, Bower and Kisselbach and could not find an answer. Is this something I have to look out for when > buying used lenses in future? > > Horace Lau >