Nikon SMZ25 Instruction Manual page 40

1 Check that the optical path of the tube is 100% to the binocular part.
2 Using coarse control, lower the zooming body to a position near the working distance.
[Working distances of objectives]
0.5x： 71 mm
1x： 60 mm
1.6x： 30 mm
2x： 20 mm
3 Using fine control, precisely focus on the sample.
 Torque of the focus knobs
For the P2-FU Focus Unit and P2-FMDN Focus Mount, the
torque of the coarse control knobs can be changed. To do this,
turn the torque adjustment ring on the base of the left coarse
focus knob using a hex driver (nominal designation, 2:
supplied with the focus unit). When the torque is too low, the
vertical position of the zooming body may slide due to various
loads (such as its own weight or the load of the
counterbalance spring inside the focus unit). Be sure to adjust
the torque to an appropriate level. Note that turning the fine
control knob will cause the coarse control knob to also turn,
changing the torque of the fine control knob.
 Focusing stroke
 P2-FU Focus Unit
Focusing stroke:
Stroke per rotation of the focus knobs
 P2-MFU Motorized Focus Unit
Focusing stroke:
 P2-FMDN Focus Mount
Focusing stroke:
Stroke per rotation of the focus knobs
Useful functions for focusing
When using the P2-MFU Motorized Focus Unit, the remote control enables the following remote operations: changing the
focus speed, setting the limit position, setting retracting, and resetting Z. For details, see Chapter 4, "2.2 P2-MFU
Motorized Focus Unit."
* Also see Chapter 4, "2 Focus Units."
Chapter 3
Specific Operations
100 mm
Coarse control, 18.50 mm per rotation
Fine control, 3.27 mm per rotation
100 mm
65 mm
Coarse control, 18.50 mm per rotation
Fine control, 3.27 mm per rotation
26
Torque increase
Adjusting the torque of the focus knobs
Torque adjustment
ring