Optical System - Nikon Epiphot 300 Manual

15. Optical System

• Use CF objectives always in combination with CF eyepieces.
• Nikon's 50x or higher magnification objectives (except ELWD) are equipped with a
safety mechanism. However, the top lens of each of these objectives slightly protrudes
beyond the metal rim around it. Carefully rotate the revolving nosepiece to which these
high magnification objectives have been mounted. Do not hit them against the sample or
the like.
• CF PL projection lenses are designed only for use in photomicrography. Do not use them
as eyepieces.
• Eyepieces tend to collect dirt or dust. Both may appear as shadows or impair image
contrast or resolution. Keep eyepieces always clean.
• Leave the analyzer slider, the polarizer slider and the reticle slider in their respective
ports to prevent dust from attaching to the optical system in the microscope base. (Or use
their dust-tight sliders for the same purpose.)
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