Carl Zeiss Axiolab A3-6 B 40-015 e 06/99(1) Centering of Objectives (only for Axiolab Pol catalogue No. 450910-0000-000)Fig. 3-4 Centering of objectivesWhen the Pol stage (3-4/3) and uncentered objectives are turned, object details above the center of theeyepiece cross migrate to circular paths (3-4/1 - dashed line). The following procedure is required tocenter the objectives:• Unlock the stage stop by turning screw (3-4/6) by approx. ¼ rotation in counterclockwise direction.• Swing in transmitted-light objective of medium magnification (20× - 50×) via the nosepiece.• Insert SW 1.5 key (3-4/2) in the drilled centering holes on the nosepiece.• Turn the specimen stage and search for the apparent center of rotation (cross (3-4/1)). The center ofrotation is also the center of the stage rotation.• Use the keys to move this center of rotation to the intersecting point of the eyepiece crosslines andtherefore into the optical axis of the microscope.• Repeat the procedure with a distinct, small object detail in the direct proximity of the center of therotary stage.• Carefully remove the key.• Swing in the neighboring objective; search for the center of rotation and the distinct object detailsand perform the adjustment procedure as described above. To retain the centering status, it is absolutely necessary to change the objectives only via theknurled ring of the objective nosepiece.
