The numerical aperture is a measure of the solid angle covered by an objective. Spatial resolution can be calculated using a small angle approximation. It indicates how the lens can resolve the smallest features of a specimen. Rayleigh's original 1879 paper describes it as:Д®xcerpt from 'Resolving, or Separating, Power of Optical Instruments' The equation is based on the fact that point sources of light in a diffraction limited optical system will produce Airy disks. Calculating these values will help you determine the best imaging lens for your application. At its longest zoom, it has an aperture diameter of 539 mm / 8 67 mm 6.7 cm. Determine the focal length required, angular field of view, object space resolution, and primary magnification of a given imaging application based on the sensor size, pixel size, working distance, and field of view in mm. The Rayleigh Criterion specifies the minimum angular seperation of two point sources of light such that they can be resolved as distinct objects. The so-called flat Earth camera Nikon P1000 has a 4.3-539mm 1:2.88 lens. The FWHM angular size is more appropriate for high-resolution planetary. In particular, this is calculator is useful for remote imaging systems and stopped-down large format cameras. Discussion: The Airy disk can be smaller than the theoretical formula indicates. For a lens stopped down to a large F-number, this is a reasonable estimate, but resolution will be limited by other factors such as spherical aberation in the lens when shooting wide open. This calculator determines the diffraction limited resolution of a camera using the Rayleigh Criterion.

Angular resolution calculator of a lens