Lens Aperture-Area Assistant app for iPhone and iPad
This aperture area calculator helps you to compute the aperture area of a lens.
Try the calculator right now, learn about the aperture diameter, f-number, and the aperture area relation.
An aperture is a hole, or an opening, in an optical system through which the light enters. The larger the aperture, the more light can enter. At the same time, the light is less collimated. Smaller aperture results in more collimated light entering at the cost of lower intensity.