Convert the pitch into a frequency
A 5 µm pitch is 0.005 mm. Along a sensor row, the sampling frequency is 200 samples/mm and the Nyquist frequency is 100 lp/mm. Find 100 lp/mm on the horizontal axis of an image-space MTF chart.
Choose the curve before reading the value
Match aperture, field point, orientation, focus and spectral conditions to the application. A sagittal trace and a tangential trace may differ off axis. Report the chosen conditions alongside the contrast value.
Connect the lens to the camera
A point on the lens curve describes optical contrast under the stated conditions. Pixel integration and subsequent processing also affect the camera result. Try 4 µm in the calculator and locate the new 125 lp/mm sampling limit on the same plot.