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sealed to prevent oil contamination, it is a good practice to avoid
dragging these objectives through an oiled slide. The 100XRD oil
immersion lens on Swift microscopes has a spring-loaded end to prevent
cracking the cover slip upon its initial contact. Once this zone of safety
is exceeded by moving the slide further toward the lens, a point can be
reached where damage will occur. Always make a practice of frequently
checking the position of the lens on the slide. Note that a 100XRD
objective requires an iris diaphragm for brightfield oil immersion
microscopy.
HOW TO USE THE POINTMASTER
®
EYEPIECE RETICLE
Swift's patented POINTMASTER® eyepiece reticle, which is installed in
the eyepiece of the microscope, enables the user to easily measure the
size of the specimen.
I. The numbers on the chart indicate the actual size of the
POINTMASTER® scale in millimeters. For example, the length is
1.0mm from the top of the arrow to the bottom; the total length of
the scale is 8.0mm, etc. The thickness of all the horizontal lines is
0.01mm.
2. To obtain the actual physical size of a specimen, divide the
POINTMASTER® scale readings by the magnification of the objective
lens that is in use. Divide the readings by 10 if the 10X objective is
being used, 40 if the 40XRD objective is in use, or 100 if of 100XRD
is in use.
