Focusing Knobs
The focusing knobs (3) are located on both sides of the
microscopes. On each side there are two knobs (A and B). They Both knobs
function by raising or lowering the stage. The outer (bigger) knob moves it
through a greater distance for a small turn and is called the coarse
adjustment knob. The inner (smaller) knob is for fine adjustment.
nVery gently turn knob A both ways and notice the movement of the stage.
Turning in the direction indicated by the arrow should lower the stage. The
opposite movement will raise the stage.
nBe very
careful when raising the stage. A badly aligned objective may be hit by the
stage.
n Turn the fine adjustment knob (B) and note
that the movement of the stage is imperceptible.
A
B
A
B