Binocular Terminology

BINOCULAR TERMINOLGY

When purchasing binoculars its best to familiarize yourself with the common features, specifications and latest innovations in sport optics technology. To help users with selecting binoculars, OUTLOOK uses standard specifications and binocular terminology to make choosing a binocular easier. All binoculars have a set of features and a technical specification chart.

BINOCULAR DESCRIPTIONS

What do the numbers 10x50 stand for on binoculars? The number before the "x" is the magnification or the binoculars power, the number after the "x"is the size of the objective lenses in millimeters

BINOCULAR MAGNIFICATION

The magnification of binoculars is also known as the binoculars power. A 10x42 binocular has a 10x fixed power, this allows the user to view objects 10x closer then they would be able to see with the naked-eye.

LENS COATINGS

To enhance the image quality and brightness of images viewed with the binoculars OUTLOOK coats the lenses. OUTLOOK has five types of coatings from (basic to advanced) coated, fully coated, ruby coated, multi-coating, and fully multi-coated.

OBJECTIVE LENS

The objective lenses of binoculars are the lenses in which the light enters the binoculars. Measured in millimeter, a 10x50 binocular has a pair of 50mm lens. The larger the lens, the heavier the binoculars.

CLOSE FOCUS DISTANCE

A binoculars close focus distance is the minimum distance the user will be able to focus on an object. Low power binoculars typically have a closer close focus distance then high power binoculars. 20-140x Astronomy binocularshave very high magnification for looking at objects very fare away, with that high power the minimum close focus maybe a few yards off.

FIELD OF VIEW OR "FOV"

The the field of view is a measurement of how wide the user will be able to see at a fixed power. Field of view is measured at 1000 feet for binoculars, the wider the view at 1000 feet the more of the image you will be able to see. High power binoculars typically have a narrow field of view. Typically low magnification binoculars such as 7x50 binoculars have a very wide field of view.

BINOCULAR PRISMS

There are 2 types of prism systems, straight roof prisms and the angled porro prism systems. OUTLOOK makes 2 types of prism glass, the standard Bk-7 and the higher quality BAK-4 prism. Additional features such as phase coatings enhance the quality of the viewing experience.

ZOOM BINOCULARS MAGNIFICATION

Zoom binoculars allow the user to increase and decrease the magnification. A 10-30x50 binocular has a minimum magnification of 10x which can be increased to a maximum power of 30x magnification.