24
3-2 Focusing unit (Manual frame only)
1
Focusing operation
2
Adjusting the coarse focusing knob tension
The focusing unit is designed to be lowered (approaching the objective
with the specimen) when the coarse focusing knob a or fine focusing
knob b is turned in the direction of the arrow.
The tension of the coarse focusing knob is adjustable. Turn the rotation
tension adjustment ring c in the direction of the arrow to decrease
the knob’s tension and in the opposite direction to increase it.
} If the focusing unit lowers by its own weight or the focus obtained
with the fine focusing knob b is lost soon, the tension is set too
loose. In this case, turn the rotation tension adjustment ring c
clockwise (opposite direction of the arrow) to increase the tension.
} If it is difficult to rotate the rotation tension adjustment ring, insert the
Allen screwdriver provided with the frame into the hole d (either
one of 4 holes) of the adjustment ring and rotate the rotation tension
adjustment ring.
Do not use any tool other than the Allen screwdriver
provided with the frame. Otherwise, the failure may be
caused.
CAUTION
a
b
c
d
