on 9/05/2005 07:32, Andrew Fildes at afildes@xxxxxxxxxxxxxx, wrote:
> That's the equivalent of a Skylight 1A - slight warming and useable
> as a protection filter if you normally shoot in broad daylight. 1.1x
> refers to the filter factor, indicating that you lose just 0.1 of a
> stop. Never sure what the KR means but a KR3 is much 'warmer.' I
> prefer their UV 010 as a protector.
> AndrewF
>
Thanks, Andrew.
Just did a little googling and to my surprise, the KR 1.5 corrects
temperature from 3400 to 3200 K, which would be a Sky 1A equivalent.
But the 81a seems to correct from 3400 to 3200 too !! - as said in:
<http://www.schneideroptics.com/filters/filters_for_still_photography/uv_&_w
arming/more_information/>
Looking at it, it looks quite brownish - and my Hoya Sky 1a looks rather
pink, with green relections due to multicoating.
Looking through it, it seems to warm up much more noticeable than the Hoya.
That's why I thought it was a 81a - but the table at the link above lists KR
filters as different to the 81a & 81b.
Regards,
Fernando.
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