focallengthangle

For comparison, the human visual system perceives an angle of view of about 140° by 80°. Focal length (mm), Diagonal (°), Vertical (°), Horizontal (°).

The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power.

The focal length of a lens determines the angle of view, also known as the field of view. In other words, it's how much of a scene the camera's sensor captures.

Learn how to understand focal length and field of view for imaging lenses through calculations, working distance, and examples at Edmund Optics.

The FOV for a 50mm lens would be 39.6 degrees horizontally and 27.0 degrees vertically. Diagonally, the FOV is 46.8 degrees. For a 55mm lens on a APS-C/DX ...

“Angle of view” describes how much of the scene in front of the camera will be captured by the camera's sensor. In slightly more technical terms, it is the ...