MTF (Modulation Transfer Function) describes how well a lens can reproduce fine details, measured as the degree of contrast achieved between finely spaced lines.
[1] Contrast (%) [2] Distance from optical centre of lens (mm) [3] At 10mm / Max. aperture [4] At 10mm / F8 aperture [5] At 20mm / Max. aperture [6] At 20mm / F8 aperture [7] Spatial frequency [8] 10 line pairs / mm [9] 30 line pairs / mm [10] Radial values [11] Tangential values