Archived posting to the Leica Users Group, 2008/11/22

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Subject: [Leica] Multi-Coating Development
From: robertmeier at usjet.net (Robert Meier)
Date: Sat Nov 22 09:36:46 2008
References: <25182388.1227320210018.JavaMail.root@elwamui-royal.atl.sa.earthlink.net><20081122034337.1305C13574@barracuda.rutabaga.org><CB430BD7F2FE428F8362EE937ACDA9D1@robertbxucevjs> <793E91D4-FAFE-48C3-9390-A5066513630E@verizon.net>

Len,

Thanks very much for that.   I should have thought of consulting Erwin!

Bob

----- Original Message ----- 
From: "Leonard Taupier" <len-001@verizon.net>
To: "Leica Users Group" <lug@leica-users.org>
Sent: Saturday, November 22, 2008 10:36 AM
Subject: Re: [Leica] Multi-Coating Development


> Bob,
> 
> In Edwin Puts "Leica Lens Compendium" he has a section on Coating and  
> Lens Flare, pages 81 to 83. He states that all current Leica lenses  
> have multi-layer coatings and that all surfaces are coated. He also  
> states that the amount of coating for each element depends on the  
> type of glass used and the desired result from each element. In some  
> instances multi-coating can degrade performance and single coating is  
> much preferred. An example he gave of unacceptable performance due to  
> multi-coating is polarization of the light passing through the element.
> 
> The free, downloadable version of his Compendium is currently not  
> available but will be in the future.
> 
> Len
> 
> 
> On Nov 21, 2008, at 11:25 PM, Robert Meier wrote:
> 
>> Marc,
>>
>> The archives don't answer the question of whether Leica lenses are  
>> multi-coated.   In fact, no one seems to know, as your answer  
>> indicates -- "... I suspect that that would have been when Leitz  
>> began multi-coating its lenses."
>> Perhaps, Ted, this is an academic question, but it's one I've been  
>> curious about for some time, and I thought this would be the place  
>> to ask it.   You seem to want to censor my question, even though it  
>> is a legitimate question about Leica lenses.   Why is that?   Are  
>> only questions that interest you allowed here?
>>
>> Bob
>>
> 
> _______________________________________________
> Leica Users Group.
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In reply to: Message from wildlightphoto at earthlink.net (wildlightphoto@earthlink.net) ([Leica] Are Leica lenses muliticoated?)
Message from marcsmall at comcast.net (Marc James Small) ([Leica] Multi-Coating Development)
Message from robertmeier at usjet.net (Robert Meier) ([Leica] Multi-Coating Development)
Message from len-001 at verizon.net (Leonard Taupier) ([Leica] Multi-Coating Development)