Leica DM4500P Operation For lockable immersion objectives, For objectives with corrective mounts

8. Operation

For lockable immersion objectives:

•Lock these by pushing the front part upwards until it stops (approx. 2 mm).

•Then, after a gentle turning motion to the right, the objective is locked (Fig. 63).

For objectives with corrective mounts:

•Turn the knurled ring to adjust the objective to the thickness of the cover glass.

Objective centering * (DM4500 P)

!Caution:

When changing the objective, the centering key must no longer be in the corresponding open- ings.

When centering the objectives (Fig. 64, 65), use two hexagon wrenches to move the objectives so that the optical axis of the objective (and, therefore, the center of the image) is aligned with the axis of rotation of the objective stage. If the objectives are centered correctly, a pro- grammed specimen position will not drift out of the field of vision when the stage is turned. Therefore, a specimen point located inside the center of the cross-hairs does not change its position when the stage is rotated a full turn. When centering objectives, it is best to use a detailed, high-contrast specimen.

Fig. 63a Immersion objective, released Fig. 63b Immersion objective, locked

↔ ↔

56