MTF Chart
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 center of lens (mm)
[3] At 20 mm / Max. aperture [4] At 20 mm / F8 aperture
[5]At 70 mm / Max. aperture [6]At 70 mm / F8 aperture
[7]Spatial frequency [8] 10 lines pairs / mm [9] 30 line pairs / mm
[10] Radial values [11] Tangential values