15
B.
Iris Diaphragm suggested openings:
•
4x objective-iris open 1/8,
•
10xobjective-iris open 1/8 to ¼,
•
40x objective, iris open ¼ to ½,
•
100xobjective-iris open ½ to ¾
XI. Changing magnification is accomplished by rotating by rotating objective turret until different
objective lens is moved into optical path. Always turn turret until you hear the “click”, indicating
that lens is properly indexed. Otherwise, you will not be able to see anything when looking through
the microscope. A slight adjustment of focus and diaphragm openings will be needed to sharpen
the image when changing objective magnification.
A. Models supplied with 100x oil immersion lens. To obtain the maximum resolution of the 100x
oil immersion lens it is necessary to apply immersion oil between cover glass of slide and front
lens of objective. Use a very small amount of immersion oil. Air bubbles must be removed from
between lens and slide by gently moving nosepiece back and forth.
B. Each time immersion oil is used on the 100x it is essential that you clean front of lens after use.