Primotech MAT Instruction Manual page 34

5 Polarization and Conoscopy | 5.2 Centering the Objectives
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3 Insert the 0.5 mm hex key into the screws on either side of the objective.
4 Turn the screws to move the object half the way back to the center of the
crosshair.
5 Repeat the steps above until the object no longer moves when the stage is
rotated.
INFO
Each objective needs to be centered individually.
Primotech | Document 430055-9044-008 V.1.0; 03 / 2014