Archived posting to the Leica Users Group, 2001/03/14

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Subject: Re: [Leica] Re: Lens coating
From: "onetreehillclw" <>
Date: Wed, 14 Mar 2001 19:12:12 -0600
References: <> <>

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" <>
To: <>
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

In reply to: Message from Dr H L Lau <> ([Leica] Re: Lens coating)