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The Nikon Type B3 Clear Matte IIa Focusing Screen is an interchangeable focusing screen compatible with the Nikon FM3A camera. This Matte/Fresnel screen features a 3mm circular clear rangefinder spot and a 12mm reference circle. Ideal for general use, and especially with lenses having small apertures.
In the Box
Nikon B3 Focusing Screen for FM3A - Clear Matte IIa