Binocular Field Of View Calculator

Learn what field of view means how it works in binoculars or scopes.

Binocular field of view calculator.

The larger the value is the wider the viewfield available. With binoculars spotting scopes and other optical devices the field of view is measured at 1000m so the hypotenuse is also 1000m. Apparent field of view iso 14132 1 2002 standard convert angular fov in degrees to apparent fov in degrees. The higher the angle the wider the field of view and the angular fov remains the same at any given distance.

Athlon optics midas 8 42 ed binocular. Now do i divide the second figure into the first after converting both to yards 1000 122so would that work out roughly to 8 degrees fov thanks in advance glen. Just multiply the angular field by 52 5. Then we calculate the value of cathetus a adjacent to angle γ using equation below pythagorean theorem.

For example binoculars with a wider field of view are advantageous for locating fast moving wild birds within the viewfield. Angular field of view can be used to calculate the linear field of view. For example binoculars with a 5 8 degree angular field of view might be advertised as having a linear field of view of 102 mm per meter. 2 x arctangent magnification x tan angular fov 2.

Remember when the power increases field of view becomes narrower. For example if the angular field of a particular binocular is 8 then the linear field at 1000 yds will be 420 ft 8 x 52 5. Binocular s field of view primarily depends on eyepiece design exit pupil not on the size of the binocular. 60 is considered wide angle.

To calculate angular to linear fov is easy. Field of view calculator test different telescope camera eyepiece combinations. It also depends on the magnification power. For magnification 20x field of view is around 3 3 degrees 199yds 1000 ft.

Lower powered binocular always has wider field of view. I have a pair of 10 x 50 binoculars. In general a greater magnification yields a smaller field. As long as the fov is less than about 10 degrees or so the following approximation formulas allow one to convert between linear and angular field of view.

If you need a powerful binocular with a reasonably wide field of view magnification 15x is the ideal choice which has around a field of view around 4 2 degrees. Smaller binocular can have wider field of view than a big binocular. Multiply the angle by 52 5 to get the linear feet fov. Binocular field of view calculation posted in binoculars.

Visual mode imaging mode binocular mode choose. Field of view is related to magnification. Real field of view is the angle of the visible field seen without moving the binoculars measured from the central point of the objective lens.