MTF

MTF (Modulation Transfer Function) is a contrast characteristic for each spatial frequency that expresses how the repetition of shading on the object’s surface is reproduced on the image side in terms of spatial frequency and contrast ratio. Simply put, MTF expresses the imaging performance of a lens and how faithfully it reproduces the contrast of an object as an image. Contrast performance uses equally spaced black and white test patterns with specific spatial frequencies. The spatial frequency here refers to the degree of repetition of shading within a 1mm width. The MTF can then be determined by the ratio of A and B listed in the figure.

【Video】Resolving power and MTF