Calibration Micrometer SlideCalibration Micrometer Slide When there is a need to make measurements with an eyepiece reticle, there is also a need to make certain that the microscope is properly calibrated. A stage micrometer is the best way to check the divisions and measurements on the eyepiece reticule and achieve this calibration. This Omano Stage Micrometer features 5 different calibration targets, including: 1. 5mm Dot 0. 6mm Dot 1. 0mm Cross Line with 0. 01mm divisions 0.