"Lasse Karlsson" wrote:
> Pål wrote:
> BTW Can anyone tell me what an L39 filter is supposed to do? It
comes with the 600/4 and is slightly yellow.
> ++++++
>
> L39 is a Nikon designation for a UV-filter.
It's not just Nikon. All Pentax UV filters are designated L39. The
original designation was probably assigned by Kodak or some other
early photo company.
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