The numbers on binoculars show two important things: the magnification power and the size of the objective lenses. For example, "7x" means objects appear seven times closer, and "40" is the diameter of the lenses in millimeters. So, "7x40" binoculars make things look seven times closer and have lenses that gather a good amount of light for clear viewing.

Different coatings applied to binocular lenses serve various purposes, including reducing glare, improving light transmission, and enhancing image contrast and clarity. Anti-reflective coatings, such as fully multi-coated or multi-coated layers, minimize reflections and glare caused by stray light, resulting in brighter and sharper images, especially in bright or backlit conditions.

Additionally, phase-corrected coatings on prism surfaces help eliminate phase shift and maintain image sharpness and colour fidelity. Other coatings, such as hydrophobic and oleophobic coatings, repel water, oil, and dirt, keeping the lenses clean and free from smudges for clearer viewing in challenging outdoor environments.

When selecting binoculars, consider factors such as magnification, objective lens diameter, field of view, and lens coatings.

Magnification refers to the degree of enlargement provided by the binoculars, while objective lens diameter determines the amount of light-gathering capability and low-light performance. A wider field of view allows for easier tracking of moving subjects and better situational awareness.

Additionally, lens coatings, such as anti-reflective coatings, enhance light transmission and image clarity, especially in bright or challenging lighting conditions.

Binoculars with a wider field of view offer several advantages for observing fast-moving subjects, scanning large areas, and enhancing situational awareness. A wider field of view allows users to observe more of the surrounding landscape or scene without having to pan or move the binoculars as frequently. This is particularly useful for birdwatching, wildlife observation, and sports events, where subjects may move quickly or unpredictably.

Additionally, a wider field of view provides better context and spatial awareness, making it easier to locate and track subjects within the viewing area. Overall, binoculars with a wider field of view offer greater versatility and usability for a wide range of outdoor activities and applications.