LW Scientific BioVID - Manual (Page 10)

10
Mounting a Lens
Remove the lens mount cap from the camera.
Attach or remove the C-mount adapter depending on
the lens to be used. If the adapter is attached so tightly
that it is difficult to remove, use long-nosed pliers to remove
it. Insert the tips of the pliers into the holes with no threads,
then turn to remove. Or a screwdriver can also be used, as
shown. Insert M3 screws into the holes so that the
screwdriver has something to grip. (Store the C-mount
adapter for possible future use.)
Attach the lens to the lens mount. Secure it so that it does
not become loose.
If the lens has an auto-iris mechanism, connect.
Note: The 5mm spacer ring is not used when mounting a lens to the camera.
2
4
3
1
2
3
1
Back-focus Adjusting When a lens is mounted, adjustment of the back-focus may sometimes be required.
Adjust the lens focus ring when the correct focus cannot be obtained.
Adjusting Auto- Iris Lenses
Set AGC mode to off.
When using a video type lens : Adjust the level on the lens
to produce minimum smear and optimum pictures.
Set AGC mode to on. It is recommended that the AGC be
used in the “ON” mode after adjusting the video level.
With a FIXED FOCUS Lens
2
3
1 Fully open the aperture and set the focus ring to “•‡”
(infinity). In the case of an auto-iris lens only, shoot a
comparatively dark object so that the aperture is fully open.
Loosen the two back-focus screw with a hex wrench, and
turn the lens mount to focus.
After adjusting the back-focus, tighten the backfocus
screw.
With a ZOOM Lens
2
3
4
5
1 Fully open the aperture and set the lens to the maximum
tele-photo position. then turn the focus ring to focus. In
the case of an auto-iris lens only, shoot a comparatively
dark object so that aperture is fully open.
Set the lens to its maximun wide-angle position.
Loosen the two back-focus screw with a hex wrench,
and turn the lens mount to focus.
After adjusting the back-focus, tighten the backfocus
screw.
Repeat step 1) ~ 3) until the difference between
focusing position 1) and 2) becomes smallest.
Make this adjustment after connecting the camera to a power source and
a monitor.
Caution: Do not forcibly turn the back-focus screw,
as it will cause damage to the camera.