Lenses
Lenses
Configuration, MTF, Control
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 centre of lens (mm)
[3] Max. aperture [4] F8 aperture [5] Spatial frequency
[6] 10 lines pairs/mm [7] 30 line pairs/mm
[8] Radial values [9] Tangential values
[1] Contrast (%) [2] Distance from optical centre of lens (mm)
[3] Max. aperture [4] F8 aperture [5] Spatial frequency
[6] 10 lines pairs/mm [7] 30 line pairs/mm
[8] Radial values [9] Tangential values
1. Focusing ring / 2. Aperture ring / 3. Focus Hold button / 4. Aperture Index / 5. Focus Mode Switch / 6. Aperture click switch
Lens Controls
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SEL40F25G