Nikon Camera Parts 2 Nikon F4 Dp-20 Diopter Adjustment Knob PreviousNikon FM2 Plate Accessory Shoe NextNikon DP-1 Eyepiece Lens Nikon F4 Dp-20 Diopter Adjustment Knob Nikon F4 Dp-20 Diopter Adjustment Knob $15.00 New Old StockPart# 1K201-087 Quantity: Add To Cart Facebook0 Twitter Tumblr You Might Also Like Nikon F4 DP-20 Finder Metering Selector Cap $13.00