On 09/05/2005, at 6:13 AM, Fernando Gonzalez Gentile wrote:
>
> Just picked up at the flea-market a BW filter marked:
> 'B+W 49 ES KR 1,5 1,1x'
> hoping it would be equivalent to a 81a filter. Now it looks more
> lika e 81b.
> Could anybody help me out of my ignorance?
>
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
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