Archived posting to the Leica Users Group, 2007/05/22

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Subject: [Leica] Leica IR Filter vs. B&W 486 IR Filter
From: robert.rose at mac.com (Robert Rose)
Date: Tue May 22 22:37:17 2007
 
My 46mm IR filter came today from Leica.  They did not ship the 60mm  
for the Noctilux, however.

I already have another 46mm B&W 486 filter, so I was able to make  
some very interesting observations:

1.  The Leica filter is much "paler" than the B&W; that is to say  
that the "hot mirror" red effect is much less evident on the Leica  
filter.
2.  The B&W filter has a thinner frame.  This is not a slim version  
(which is thinner still).
3.  The Customs declaration states that the filter is made in JAPAN.
4.  The camera does not seem to correct the cyan vignette unless it  
has a coded lens.

So, it is evident that the Leica filter is different from the B&W  
filters.  I don't have any information on how this affects the  
images, if at all.

Bob Rose
Replies: Reply from len-1 at comcast.net (Leonard Taupier) ([Leica] Leica IR Filter vs. B&W 486 IR Filter)