For example for Hikvision DS-2CD2622FWD-I(Z)(S) the manufacturer has the following angle range specified: from 35 to 106 degrees. Ordinary lens calculators will give a wrong angle range, most likely: from 24 to 85 degrees.

96 inchesto mm

Built-in camera FOV calculator displays the range of viewing angles for the selected wide angle camera with variofocal lens.

In everyday language the Field of View of Field of Vision, abbreviated as FOV, refers to that area which is visible through any optical instrument, which could be the human eye or a lens. This definition can be applied to the CCTV parlance and FOV can be defined as the width or height of a scene to be monitored by the security camera.  In CCTV Field of View depends on a number of factors such as the sensor format, the focal length of a lens, and the distance from the objects.

48inchtocm

It is very important to use the right lens for desired field of view; otherwise the images on security cameras will not be satisfactory. CCTV security camera lens with fixed focal length are less expensive and give smaller distortions but do not offer flexibility in terms of  field of view choices.

24 inchto mm

An inch is a unit of length or distance in a number of systems of measurement, including in the US Customary Units and British Imperial Units. One inch is defined as 1⁄12 of a foot and is therefore 1⁄36 of a yard. According to the modern definition, one inch is equal to 25.4 mm exactly.

Avoid using commonly available online lens calculators because modern wide-angle cameras have non-standard wide angles (like 110 degrees instead of 85 degrees calculated by outdated Field of View calculators), and only a FOV calculator with a built-in database of camera models can show correct angles and calculate FOV precisely.

0.48into mm

A millimeter (mm) is a decimal fraction of the meter, The international standard unit of length, approximately equivalent to 39.37 inches.

72 Inches inmm

To calculate a inch value to the corresponding value in mm, just multiply the quantity in in by 25.4 (the conversion factor). Here is the formula:

Here is the new 3D Online Lens Calculator with a built-in camera database. As a better alternative you can use IP Video System Design Tool, our professional CCTV design software. With that tool you can load a site map, add multiple cameras and see how modification of any installation parameter can affect the camera coverage.

40 inchesto mm

Camera Field of View on 2D site plan (different colors represent camera zones with different pixel density): Calculating Field of View for cameras on the imported site map or floor plan.

36 inches inmm

Also for a proper lens selection you should consider both camera installation height and object height. Without taking all these parameters in the picture, the calculation error can exceed 30%.

The only way to calculate the horizontal angle or field of view is to use manufacturer’s data and therefore tools with database of camera models, like IP Video System Design Tool show the correct result:

While every effort is made to ensure the accuracy of the information provided on this website, neither this website nor its authors are responsible for any errors or omissions. Therefore, the contents of this site are not suitable for any use involving risk to health, finances or property.

Few years ago most of camera manufactures used camera lenses with normal lens and viewing angles for such lens could be calculated using usual ArcTan() formula.