The theoretical limit to the sharpness of focus of a lens system is determined by
A)spherical aberration limitations.
B)chromatic aberration limitations.
C)astigmatic limitations.
D)diffraction limitations.
E)the relative smoothness of the lens surface.

Question

Quizplus · Accepted Answer

Diffraction limitations determine the theoretical limit to the sharpness of focus of a lens system. Diffraction is caused by the bending of light as it passes through an aperture or opening, such as the aperture in a camera lens. This bending of light causes the formation of a diffraction pattern, which can limit the sharpness of the image. The size of the diffraction pattern depends on the size of the aperture and the wavelength of light, and it sets a limit on the smallest detail that can be resolved by the lens system. All lenses are subject to diffraction limitations, regardless of their design or construction.

The Theoretical Limit to the Sharpness of Focus of a Lens