16
(Fig.9)
1. Field Diaphragm 2. Field Diaphragm centering handle
(Fig.10-1)
(Fig.10-2)
4.10 Aperture Diaphragm Adjustment
Move the aperture diaphragm adjustment ring; zoom in or out the aperture diaphragm into the
suited position with the objective’s value.
Adjust the suitable size of aperture diaphragm to avoid overexposure, stray light and improve the
contrast.
