Optika B-380 Serie Manual De Instrucciones página 9

Field Diaphragm (Optional)
1. Unscrew the lens ath the base of the microscope.
(Fig. 9)
• It may take a little bit of force to unscrew the
lens.
2. Fully screw the field diaphragm (M-156).
3. System is ready for the use.
Page 9
Fig. 9