17
(Fig.11)
1. Aperture diaphragm adjustment ring
4.11 Brightness and Contrast Adjustment
Blue filter is used for increasing color temperature in routine bright field microscopy
Frost filter reduces irregularity in the illumination field, but also reduces the brightness.
To ensure enough brightness and better image quality, remove the frost filter out of light path when
using the high magnification objectives and low reflectivity of sample.
For the best contrast and image quality, adjust the condenser aperture diaphragm ever accordingly
when the objective changed.
4.12 Blub Replacement
Warning
Ensure to shut down the power supply before take off the bulb to avoid electric shock.
Do not touch the lamp during or immediately after period of operation.
Make sure the lamp has cooled sufficiently before attempting to replace the lamp.
a. Fully loosen the slotted head knurled screw on the backside of lamp house, take off the lamp house
cover
(Fig.12-1)
b. Remove the old bulb with a piece of gauze and insert the new bulb’s pins all the way into the pin
holes on the lamp socket. (Fig.12-2)
