8
2.2.6 Mounting aperture iris
diaphragm attachment
(Fig.8
、
Fig.9)
○
Aperture iris diaphragm attachment
is optional.
1. Use the provided hexagonal driver
to loose the clamping bolt and
remove the binocular viewing head
①
.
2.Mounting the aperture iris
diaphragm attachment
②
to the top
end of the zoom body.
3. Mounting the binocular head into
the aperture iris diaphragm
attachment and tighten the clamping
bolt
③
.
Adjusting aperture iris diaphragm
●
The aperture iris diaphragm adjustment can increase the image contrast and focus depth.
●
The size of aperture iris diaphragm can be adjusted. Switch the lever to left to open the aperture
iris diaphragm; to the right, to close the aperture iris diaphragm. Check the effect during
observation.
★
Do not close the aperture iris diaphragm too much, or it will decrease the resolution and lead to
lack of illumination.
★
Closing the aperture iris diaphragm to the minimum state will result in faintness in field of view.
In this case, adjust the aperture iris diaphragm to the half open state.
★
Closing the aperture iris diaphragm to the minimum state and increase the magnification of the
zoom body will result in lack of illumination around circumference of field of view.
Fig.8
①
②
Fig.9
Aperture iris diaphragm lever
③
