Nikon eclipse E200, Instructions Manual

Page: 68 / 88

Chapter 5 Miscellaneous Operations
6 ND Filter for the Objective
66
●
TV Relay Lenses
For the C-mount CCTV camera, 0.6x, 0.45x and 0.35x relay lenses are available. Select the
magnification of the relay lens according to the size of the photographic element. When a
3CCD TV camera is used with some relay lenses, the colors of the video image may blur. For
details, ask your nearest Nikon representative.
●
Color Tone
The color tone of the light from the lamp varies with the position of the brightness control
dial. If the dial is turned clockwise and the voltage is increased, the light has a bluish tone. If
the voltage is reduced, the light has a reddish tone.
Attach the provided blue filter to the bottom of the condenser and check the color tone of the
specimen.
●
Uneven Viewfield Brightness
When a 4x objective is used for the photomicrographic equipment or digital still camera, the
viewfield may look partially dark. Make the brightness of the viewfield uniform using one of
the following methods.
• Lower the condenser.
Slightly lower the condenser to take more space between the specimen and the condenser.
If the microscope is equipped with a field diaphragm, the field diaphragm image may blur
slightly.
• Use a phase-contrast condenser and diffuser slider (both optional).
Attach the phase-contrast condenser and the diffuser to the microscope. When the diffuser
is inserted into the optical path, the amount of light will drop to about 60% of its initial
value. Also, you will not be able to see the field diaphragm in the viewfield.
6 ND Filter for the Objective
When observing the specimen with 10x and 40x objectives in turns, placing an ND3 filter
(specially designed for objectives; optional) to the rear end of the 10x objective will facilitate
the observation. With the ND filter attached, you will have the same brightness and color
tones for both 10x and 40x objectives without adjusting the brightness control dial.