Binocular Field Of View Explained

Understanding angle of view.

Binocular field of view explained.

Binoculars or field glasses are two telescopes mounted side by side and aligned to point in the same direction allowing the viewer to use both eyes binocular vision when viewing distant objects most are sized to be held using both hands although sizes vary widely from opera glasses to large pedestal mounted military models. The field of view is the same as the angle of view. The apparent field of view is the magnification of the binoculars multiplied by the field of view shown as an angle. Field of view fov is the measured area of the scene you can see when looking through your optic.

Therefore higher magnification will result in a narrower field of view. It is expressed in two ways. What is important to note is that the field of view is affected by an increase in magnification. Field of view field of view is expressed in feet at a distance of 1 000 yards or meters at 1 000 meters and is the width of the visible area that can be seen without moving the binoculars.

Generally the higher the magnification and smaller the objective the narrower the field of view. First angle of view aov. This raises the question of what does 10 50 mean in binoculars especially in relation to the field of view. When expressed in feet the field is called linear and when expressed in degrees it is called angular.

It gives a wider field of view. The field of view is the area of sky or land seen through your binoculars determined by the design of the instrument s optics. For example humans have a maximum horizontal field of view of approximately 190 degrees with two eyes approximately 120 degrees of which makes up the binocular field of view seen by both eyes flanked by two uniocular fields seen by only one eye of approximately 40 degrees. Most binoculars tend to fall into either the 8x or the 10x magnification ranges because at higher power binoculars often have poorer quality images and smaller fields of view.

To explain the angle of view it is easier to start with the field of view fov of a pair of binoculars which is a measurement that indicates the width of the view you see through the binoculars at a specified distance it is most often represented in feet at 1 000 yards but increasingly common is in meters at 1 000 meters. It is determined by multiple components in the optic that includes the eyepiece thickness of the lenses position in its assembly and magnification. For example a 7x40 pair of binoculars with a 7 field of view would have an apparent field of view of 49. Binoculars which have an apparent field of view greater than 65 are deemed to be wide angle binoculars.

Angle of view walks hand in hand with field of view as they refer to the same thing. We will discuss them separately to avoid confusion and show you how to convert one to the other if needed. Unlike a telescope binoculars give users a three dimensional 3d. The amount of horizontal scenery that is visible when looking through the binoculars.