Understanding Binocular Ratings: Magnification and Objective Lens
Quick answer Binocular ratings tell you how much they magnify and how much light they gather. The first number is magnification (e.g., 8x means 8 times closer). The second number is the objective lens diameter in millimeters (e.g., 42mm). Higher magnification brings things closer but can be harder to hold steady. Larger objective lenses let…