SM-4 Series Stereo Microscope
AmScope Proprietary Page 13 of 37
2.4 Focusing
AmScope‟s SM series microscopes have continuous zoom magnification power
allowing you to change magnification through a range, instead of at fixed stops.
2.4.1 Adjusting the Focusing Rack, Coarsely.
Loosen the lock-screw located
behind the pillar stand.
Move the entire focusing rack
down as far as possible. Move
the rack back up until the
working distance is roughly 4”.
Working Distance is the term
for the distance between the
bottom of the objective lens
and the top of the specimen.
Tighten the focusing rack lock knob to fix the final position.
2.4.2 Adjusting the Focusing Rack, Finely.
When first using the microscope,
remove any Barlow lens.
Adjust the magnification knob to the
lowest setting (0.7X)
Move the microscope‟s focusing knobs
to adjust the height of the unit until at
approximately 4 inches (101mm) away
from the specimen. This should bring
the microscope in focus at 7x.
2.4.3 Parfocal
Under the diopter on the eyetube,
there is a silver ring. The diopter must
be set to just above the ring, so the
image will remain in focus for the
entire magnification range. So, if you
adjust the diopters properly, you will
stay more in focus when you add a
camera or switch objective lenses.
To Next Page
Loading...
