Tagged: eye cups


Glossary of Binocular Words

Learn Bino Lingo and be in the know using binoculars Good to know binocular words, terms and definitions APERTURE is defined as theamount of light gathering ability of binocular lens.  It is the size...


What Is Eye Relief

Here’s a helpful 3-minute video from Eagle Optics about eye relief and binoculars. The illustration explains how and why to adjust the eye cups of binoculars for eye relief. The distance between your eyes...