The F6 camera features interchangeable focusing screens. The type "M" interchangeable focusing screen shows crosshair and millimeter scales, on a matte/Fresnel field, with AF marks, and a 12mm microprism collar. Ideal for high-magnification close-ups and astrophotography.
Reviews Nikon Type M Focusing Screen for F6 - Matte with Double Crosshairs & mm Scales, AF Marks & 12mm Center Circle