OEM Optical IVS-CCAM3, Руководство по эксплуатации

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21
Back-focus adjustment
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.
WITH A FIXED-FOCUS LENS
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.
2) Loosen the two back-focus screw with a hex wrench,
and turn the lens mount to focus.
3) After adjusting the back-focus, tighten the backfocus
screw.
WITH A ZOOM LENS
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 comparative-
ly dark object so that aperture is fully open.
2) Set the lens to its maximun wide-angle position.
3) Loosen the two back-focus screw with a hex wrench,
and turn the lens mount to focus.
4) After adjusting the back-focus, tighten the backfocus
screw.
5) Repeat step 1) ~ 3) until the difference between focusing
position 1) and 2) becomes smallest.
COLOR CCD CAMERA
DIGIT DIGITAL AL
Back-focus screw
Caution : Do not forcibly turn the back-focus
screw, as it will cause damage to the
camera.
Caution : Do not forcibly turn the back-focus
screw, as it will cause damage to the
camera.