[Leica] IR/UV filter differences

[len-1 at comcast.net (Leonard Taupier)]

George,

I've done extensive testing with Leica, B+W and Heliopan filters. The  
differences are most pronounced at the extreme wide angle lenses like  
15, 16, 18 and 21mm. The B+W and Heliopans are stronger then the  
Leica's so the M8 under corrects for cyan creep. In the case of the  
21mm a very slight correction in PS is OK. It's a lot more difficult  
with the ultra wides.
At focal lengths above 21mm I don't see a difference.  All my testing  
was with lenses that are 6 bit coded and from 16mm up to and  
including 35mm. My son did the same test with his CV15mm.
I hope this helps.
Len




On Sep 13, 2007, at 7:01 PM, Lottermoser George wrote:

> Have any M8ers out there compared the effects between the B&W and  
> Leica IR/UV cut off filters.
> Any reason to seek one over the other?
> Firmware compatibility?
> Etc.?
>
> Regards,
> George Lottermoser
> george@imagist.com
>
>
>
>
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