RMM2 ROLLSCOPE MICROSCOPE
UNITRON
®
73 Mall Drive, Commack, NY 11725 • 631-543-2000 • www.unitronusa.com
9
Using the Field Diaphragm
While observing a specimen that has been focused, slowly open and close the field diaphragm using the
lever on the illuminator assembly. The diaphragm is used to eliminate glare by restricting the specimen
illumination to the area actually being observed. Therefore, the diaphragm should be opened only until
the full field of view is seen completely illuminated and no more. Opening the diaphragm more may
cause glare that will produce “washed-out” images.
Visual Observation
The top eye lens of the WF 10x eyepiece has a threaded focusable mount. Before focusing the
specimen, hold the lower part of the eyepiece with one hand and rotate the upper threaded focusable
eye lens with the other hand until the image of the eyepiece reticle is in focus. Rotate the coarse focus
knob to obtain approximate focus of the specimen using the 5x objective. Then rotate the fine focus
knob until the specimen is in sharp focus. A slight adjustment with the fine focus knob may be necessary
when changing objective power.
Changing Objective Magnifications
Total magnification is the product of the eyepiece power multiplied by the power of the objective. The
objectives are parfocal. Therefore, once an image is in sharp focus, only a slight adjustment of the fine
focus control will be needed when rotating the nosepiece from one objective power to another.
Filters
Two filters, green and yellow, are supplied in metal mounts with handles. These fit into the illuminator
filter slot. The filters are used to create contrast in the specimen, minimize reflections and produce
images that are most satisfactory to the observer. The achromatic objectives are designed to give the
highest degree of color correction and maximum image quality when used with green light, the color to
which the human eye is most sensitive. Therefore, the green filter is recommended for most visual
observations.
Measuring Reticle
The crossline reticle is already installed into the eyepiece. The reticle, when magnified and seen through
the microscope, is approximately equal to the ruled value of the reticle divided by the magnification of the
objective.
