Joseph wrote:
> PF "(Flourescent)": 77, 112, 145, 150mm
>
> A brownish to magentaish filter to correct for flourescent lighting's
> ugly green cast.
>
> But why in only the larger sizes?
Nope. They are protective filters for the super telephoto lenses. Its a 150mm PF
filter in the front of my 600/4.
BTW Can anyone tell me what an L39 filter is supposed to do? It comes with the 600/4
and is slightly yellow.
Pål
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