[APML] Big Filters for Medium Format Tri-color

[Aplanatic@aol.com]

Dear List:

Aside from Wratten filters (with their known transmission problems) 
does anyone know where one can find a tri-color filter set that has 
decent transmission characteristics and where the clear aperture 
of the filters are at least 2.4" square (60 X 60 mm).

Thanks,

Dave Rowe

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