40x
Objective
nWith the
10x lens select the area of interest and using the stage movement, bring it
roughly in the centre of the field. Raise the condenser. You may also need to
open the iris diaphragm.
nVery
carefully, rotate the nose piece so that the 40x objective clicks in place. Be
very careful – watch how close the lens is to the slide.
nDo NOT touch the coarse adjustment knob! Use only fine adjustment to get a sharp
image. If you face difficulty in obtaining a sharp image, call a
demonstrator!
nWhen you
are done with the 40x lens return the setting to the 10x or 4x objective. Never take the slide off the
stage with a 40x objective in place.