Sport Optics

Basic Information about Binoculars

Eye relief

Eye relief is the distance from the outer surface of the eyepiece lens to the position where the exit pupil is formed (eyepoint).
Looking through binoculars from the eyepoint, you can obtain the whole field of view without vignetting.
It is recommended for eyeglass wearers to use binoculars with a longer eye relief (high eyepoint).

Eye relief

For eyeglass wearers

Long-eye-relief binoculars
Short-eye-relief binoculars

Sport Optics Guide -Binoculars-


Basic Information about Binoculars


How to Choose Binoculars


How to Use Binoculars


Structure and Optical Technologies


Sport Optics Guide -Fieldscopes-