What is eye relief?
A13. Eye relief is the maximum distance your eye can be from the eyepiece and still see the entire field of view. If your eye is farther back than this distance, you will see a reduced field of view. Eye relief is of primary concern for people who wear eyeglasses when they look through a binocular because their glasses prevent their eyes from getting close to the eyepieces.
Eye Relief is the distance, expressed in millimeters, from the ocular (eyepiece) lens to the point where the eye is positioned to view the entire image. Eye relief is affected by magnification, the number of lens elements, and field of view. Spotting Scopes designed with long eye relief are usually preferred by those who wear eyeglasses. Most Spotting Scopes provide 8-13 mm of eye relief. Spotting Scopes with “long eye relief” provide from 14-20 mm (or more) eye relief. 4. What is Field of View (FOV) ? Field of View describes the size of the area that can be seen through the Spotting Scope and expressed as the number of feet per 1000 yards of distance, the higher the magnification the narrower the field of view. A wider field of view is often preferred by hunters who want to scan large areas for game or for viewing sporting events. 5. What does Resolution mean ? It describes how sharp or clear an object appears when viewed. Resolution is primarily determined by the objective lens diame
Eye relief is the distance between the eyepiece and the cornea (surface of the eye) when binoculars are held in viewing position and the full image, the cone of light exiting the eyepieces, can be seen. Eye relief is important because the proper distance can make viewing a pleasure, while improper distance will make using the binoculars a frustrating experience.
