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Smooth coaxial focusing is achieved by the
wear-resistant ball-bearing mechanism that virtually eliminates backlash
and unwanted lateral shift of the specimen during focusing. One full
revolution of the large knurled knobs corresponds to 6.3mm (coarse) and
0.25mm (fine) of the stage’s vertical movement. The coarse focus has a
travel range of 33mm and the fine – 2.5mm. The graduated micrometer knob
allows vertical measurements accurate to 0.002 mm. |
