Description:
Each Nikon eyepiece diopter incorporates a numerical value,
represented by a minus value (nearsighted) or a plus value (farsighted)
number, enabling you to select the appropriate diopter for your vision
and your camera model. The eyepiece's diopter value is, when
combined with the viewfinders minus one value, the end-result value.
Mfr.# 2953