Leica DM3 XL, Инструкция по эксплуатации

Страница: 36 / 136

34
9. Contrast Methods
For color contrast, the polarizer is inserted so
that the inscription “
λ ” points toward the front.
Note:
Use the “A” prism for 5x and 10x N-Plan objec-
tives.
9.1.5 Dark Field (RL)
• Rotate the special darkfield objective (“BD”)
into position.
• Rotate the “BD” reflector into position.
• Adjust the contrast using the aperture dia -
phragm (Fig. 24.1).
Note:
The darkfield method can only be selected with a
suitable darkfield objective.
9.1.6 Fluorescence
• Insert a suitable specimen and rotate an ap -
propriate objective into place.
• Focus the image initially in transmitted light if
appropriate.
• Switch on the incident light source at the ex -
ternal power unit.
• Select an appropriate fluorescence filter cube.
• Switch magnification changer, if present, to
factor 1x.
• Open the aperture diaphragm.