Archived posting to the Leica Users Group, 2007/03/18

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Subject: [Leica] Ir filter and film cameras, take it off
From: glehrer at san.rr.com (Jerry Lehrer)
Date: Sun Mar 18 18:57:28 2007
References: <440b792d0703181112w1bff05c9qcbd7699a79b4b56d@mail.gmail.com> <00b401c769b1$733db420$59b91c60$@net> <8517C8B2-F603-427B-93F3-DA381E4A3FBF@comcast.net> <45FDF287.6020202@san.rr.com> <00cc01c769cd$1699d160$43cd7420$@net>
 
Frank,

I did it exactly as you suggested.  Read your own words.

    "If you take an IR/UV filter in your hand. Look through it straight 
on. The color

through the filter is quite normal. Then slowly rotate the filter so 
you are looking through it at an angle. The color through the filter 
will turn cyan. The sharper the angle, the more cyan."

Jerry



Frank Filippone wrote:
> Jerry... on what lens?  Or was this an eyeball-only test?
>
> Frank Filippone
> red735i@earthlink.net 
> Len,
>
> I have just finished trying that with eight filters and only observed 
> that effect with one filter, an E60 Leica filter.
>
> Jerry
>
>
> Leonard Taupier wrote:
>   
>> Frank,
>>
>> It has nothing to do with film or the brand of filter. The problem is 
>> the color response of the filter at extreme angles. If you take an 
>> IR/UV filter in your hand. Look through it straight on. The color 
>> through the filter is quite normal. Then slowly rotate the filter so 
>> you are looking through it at an angle. The color through the filter 
>> will turn cyan. The sharper the angle, the more cyan.
>>
>> Len
>>
>>     
>
>
>
>
> _______________________________________________
>
>
Replies: Reply from red735i at earthlink.net (Frank Filippone) ([Leica] Ir filter and film cameras, take it off)
Reply from len-1 at comcast.net (Leonard Taupier) ([Leica] Ir filter and film cameras, take it off)
Reply from lug at steveunsworth.co.uk (Steve Unsworth) ([Leica] Ir filter and film cameras, take it off)
 In reply to: Message from msadat at gmail.com (mehrdad) ([Leica] Ir filter and film cameras, take it off)
Message from red735i at earthlink.net (Frank Filippone) ([Leica] Ir filter and film cameras, take it off)
Message from len-1 at comcast.net (Leonard Taupier) ([Leica] Ir filter and film cameras, take it off)
Message from glehrer at san.rr.com (Jerry Lehrer) ([Leica] Ir filter and film cameras, take it off)
Message from red735i at earthlink.net (Frank Filippone) ([Leica] Ir filter and film cameras, take it off)