"Kotsinadelis, Peter (Peter)" <[EMAIL PROTECTED]> wrote/replied to:
>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
>*
I have a Hoya 81B skylight filter. So which is stronger, an 81
A or an 81B?
"take every day as a gift,
never get angry at the idiotic mass of humanity,
delight in the craftsmanship of BMW and nature"
Jim Davis, 2002
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