Amazon.com : Kodak Wratten Gelatin Filter 75mm/3x3" Blue Series Color Conversion #80B : Camera Lens Filters : Electronics
Wratten Filter for Slit Lamp
Reflected infrared photography: Filters
Kodak 75 x 75mm CC30R Red Color Compensating Wratten 2 8998023
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Wratten filter specs
Kodak 4 x 12" #47A Light Blue Wratten 2 Filter 8211088 B&H Photo
Wratten Longpass & shortpass Filters | Gelatine optical material