A. To attach an auxiliary objective, the auxiliary objective must be a screw mount type to ensure a
secure mount.
1. To mount the auxiliary objective to the microscope, first remove the protective glass from
the optical tube by unscrewing it in a counter-clockwise direction.
2. Screw on the appropriate auxiliary objective by turning the objective [threads facing up]
clockwise to secure the objective in the optical tube. There is no need to replace the
protective glass.
3. Adjust the working distance according to the magnification and properties of the objective
in use by turning the coarse focus either clockwise or counter-clockwise until the sample is
in focus. Refer to figure 3 for the corresponding working distances of specific objectives.
If the image appears out of focus or slanted when viewed after installing an auxiliary objective, it
is possible the objective may be mounted incorrectly. Remove the objective and refasten with care
to ensure proper alignment.
Fig.3: Auxiliary Objectives
Auxiliary Objectives
Standard Objective
0.3X 0.5X 0.75X 1.5X 2X
113mm 343mm
200mm
130mm
54mm
34.5mm
Fig. 3: Working Distances of Auxiliary Objectives
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