### Aperture Area Calculator

iOS 8.0 +
16.4 MB
Utilities

Aperture Area Calculator are physic/math calculator to compute the aperture area of a lens fast and easy.

Features:
- Instant calculation
- Result are copy able to other app
- Formula are include as reference
- Support up to 16 decimal place
- Support various unit for each input

Aperture is a hole or an opening through which light travels. The aperture of an optical system is the opening that determines the cone angle of a bundle of rays that come to a focus in the image plane.
The f-number (sometimes called focal ratio, f-ratio, f-stop, or relative aperture) of an optical system is the ratio of the lens’s focal length to the diameter of the entrance pupil.
The focal length of an optical system is a measure of how strongly the system converges or diverges light.
The amount of light captured by a lens is proportional to the area of the aperture.

Aperture Area Equation

n = f / D
A = π (D / 2)²
A = π (f / (2 * n))²

where:
D - aperture diameter
f - focal length
n - f-number
A - aperture area

*This is a universal app that work for both iPhone and iPad.

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