Nikon B00009R8TV Diopter -4.0 Correction Eyepiece

The Nikon -4.0 Correction Eyepiece is a purpose-built optical accessory that attaches to the viewfinder of compatible Nikon SLR cameras, compensating for nearsightedness so photographers can see a sharp, clear viewfinder image without wearing their prescription glasses. It provides a fixed -4.0 diopter correction, extending beyond the limited adjustment range of the camera's built-in diopter dial. This is especially useful for photographers whose vision falls outside that built-in range and who find shooting with glasses uncomfortable or impractical, particularly when pressing their eye to the viewfinder eyecup.

The eyepiece is designed for a specific set of Nikon cameras, including the D50, D70, D70S, D100, D200, N50, N60, N65, N70, N80, N6006, Pronea, and FM10. It threads onto the viewfinder in place of the standard rubber eyecup, creating a secure and flush fit. A rubber coating on the eyepiece helps prevent scratching if it does contact eyeglasses. As a genuine Nikon accessory, it is precision-ground to maintain the optical quality of the viewfinder without introducing distortion or degradation to the image you see through the lens.