Nikon ECLIPSE 80i Talimatlar Kılavuzu - Sayfa 25

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Selecting a Condenser

Objective

Achromatic/aplanat

magnification

condenser

10x to 100x

Note 1:

Depending on the type of objective, the indicated numerical aperture of the objective may not be

achieved.

For example, when an objective with an N.A. of 1.4 is used, the maximum aperture of the Abbe

condenser will be only about 65% of the objective's N.A., even when the condenser aperture

diaphragm is wide open.

Refer to the condenser operating manual for more information on universal and phase contrast

condensers.

The field diaphragm controls the amount of

illumination falling on the area of the specimen

being viewed. Turning the field diaphragm knob

changes the size of the field diaphragm. For normal

observations, the size of the diaphragm should be

slightly wider than the boundary of the field of

view. Illuminating a broader area than necessary

will result in stray light entering the field of view,

generating flare and reducing image contrast.

Appropriate field diaphragm settings are

particularly important for photomicrography. In

general, good results will be obtained by stopping

down the field diaphragm to settings slightly wider

than the area to be reproduced within the photo

frame or monitor display.

Individual Operations

13 Selecting a Condenser

Condenser ( : Optimum,

Achromat

condenser

Note 1

The entire field of view may not be covered if a UW eyepiece is attached.

: Suitable, x: Not suitable)

Abbe condenser

Note 1

1-100x condenser

Field diaphragm knob