Binocular Basics

Field of view, exit pupil, ED glass, prism types, how to adjust a pair to your eyes and a checklist for buying.

  • Vortex Crossfire HD 10x42
    Binocular Basics

    Vortex Diamondback HD 10x42 vs 12x50

    Vortex Diamondback HD 10x42 vs 12x50: compare magnification, field of view, weight, low-light use and handling to choose the right binoculars.

  • Bushnell Falcon 10x50
    Binocular Basics

    10x50 vs 7x50 Binoculars: Which Fits You?

    Binoculars 10x50 vs 7x50 compared: magnification, light gathering, steady viewing and weight, so you can pick the pair that fits how and when you look.

  • Vortex Crossfire HD 8x42
    Binocular Basics

    8x42 vs 10x50 Binoculars: Which Should You Buy?

    8x42 vs 10x50 binoculars compared: magnification, exit pupil, field of view and weight, plus which size suits birders, hunters and low-light viewing.

  • Steiner Military-Marine 8x30 Binoculars
    Binocular Basics

    8x30 vs 8x42 Binoculars: Which Size Fits You?

    8x30 vs 8x42 binoculars compared: weight, brightness, field of view and eye relief, with clear picks for hunting, birding and all-day carry.

  • Vortex Crossfire HD 12x50
    Binocular Basics

    What Is Field of View on Binoculars?

    Understand binoculars field of view, how feet at 1,000 yards and degrees describe the view, and how to choose a width for birding or distance viewing.

  • Vortex Triumph HD 10x42
    Binocular Basics

    How to Adjust Binoculars to Fit Your Eyes

    Learn how to adjust binoculars for a clear, comfortable view by setting interpupillary distance, eyecups, focus, and the diopter for your eyes.

  • Vortex Triumph HD 10x42
    Binocular Basics

    Roof Prism vs Porro Prism Binoculars Explained

    Roof prism vs porro prism binoculars differ in shape, size and design. Compare their tradeoffs and choose a style that fits your outings and carry needs.

  • Celestron Nature DX ED 8x42
    Binocular Basics

    What Is ED Glass in Binoculars?

    Learn what ED glass in binoculars does, how it reduces color fringing, what it can't fix, and when it may matter for birding or outdoor viewing.

  • Vortex Diamondback HD 8x42
    Binocular Basics

    What Is the Exit Pupil on Binoculars?

    Learn what exit pupil in binoculars means, how to calculate it, and how to choose a size for birding, travel, and low-light viewing.

  • Vortex Triumph HD 10x42
    Binocular Basics

    What to Look for When Buying Binoculars

    What to look for when buying binoculars: compare magnification, lens size, field of view, eye relief, weather sealing and fit for your outdoor use.