Zoltan wrote:
It is interesting. And right now, I'm planning to buy a slim B+W filter.
You suprised me. According to your explanation, the B+W UV filter is a kind
of sky/warming up filter to some extent. I would need a natural one.
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Zoltan,
I am a bit confused by your term natural.
What are you looking to use the filter for? That may help me to better
answer.
And yes, the KR1,5 is a decamired filter as are the Heliopan. It is a
different scheme than the Wratten system which uses 81A, B, etc.
The R1,5 is a red factor which is a slight warming filter. Slightly
stronnger than the Sky1A but not as strong as the 81A. A KR3 has a red
factor of 3 which is between an 81A and B. Decamired filters are designed
to be combined. For example two KR3s would equal one KR6, or for less
warmth combine a KR1,5 with a KR3 and you will have a KR4,5.
WHen you use a warming filter the it will eliminate the cool blue hue to a
degree because it is changing the color temperture and consequently the
coloring in the photo. UV filters do not change the color but simple filters
out the UV light. So you get a natural color without the UV blue cast.
Hope this helps.
Peter K
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