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: red735i at earthlink.net (Frank Filippone)
Date: Sun Mar 18 18:22:07 2007
References: <440b792d0703181112w1bff05c9qcbd7699a79b4b56d@mail.gmail.com> <00b401c769b1$733db420$59b91c60$@net> <8517C8B2-F603-427B-93F3-DA381E4A3FBF@comcast.net> <45FDF287.6020202@san.rr.com>
 
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 glehrer at san.rr.com (Jerry Lehrer) ([Leica] Ir filter and film cameras, take it off)
Reply from msadat at gmail.com (mehrdad) ([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)