OPERATION Stereo microscope
ZEISS Transmitted-light illuminators Stemi 508
34 435064-7044-001 01/2015
4.3.2 Transmitted-light unit in
stand K LAB
• Switch transmitted-light illumination ON by
pressing the lower knob (Fig. 21/1).
• With the transmitted light ON, turn this knob to
adjust the illumination intensity.
• Adjust the bright field (BF) by pushing the
sliding knob (Fig. 21/2) into its rear position
(BF).
• Turn the rotary knob / slider (Fig. 21/2) to swing
the clear or diffuse mirror in position or to
adjust the inclination angle.
Clear mirror for high-contrast bright
field, diffuse mirror for homogenous
bright field.
• Change over to dark field illumination (DF) by
pushing the rotary knob / slider (Fig. 21/2) into
its front position.
• Turn the mirror until the specimen structures
are brightly lit against the dark background.