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Spatial frequency-contrast characteristic
Frequency, lines/mm Contrast transfer
coefficient (XT)
2.5 0.88
7.5 0.72
15.0 0.50
Field of view cleanness
SPOTS DIAMETER ZONE 1 ZONE 2 ZONE 3
IN MICRONS
Ø5.6MM Ø5.6-Ø14.7MM Ø14.7-Ø17.5MM
> 230 0 0 0
150 - 230 0 1 1
75 - 150 0 1 2