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Chapter 5 Adjustments and Settings 119
Chapter 5 Adjustments and Settings
RET
IRIS
W
T
M
A
ZOOM
MANU.SERVO
9
4,11 2 1 3
86 57
Adjusting the Lens
Flange Focal Length Adjustment
It is necessary to adjust the flange focal length (the
distance from the lens flange to the plane of the image
along the optical axis) in the following cases.
• When a lens is fitted for the first time
• After changing lenses
• When during zoom operations the focus does not
match properly from telephoto to wide angle
1 Set the IRIS selector to the M position.
2 Turn the iris ring to F/1.8 (fully open).
3 Place the supplied test chart for flange focal length
adjustment at a range of about 3 meters (10 feet),
and adjust the lighting so that an appropriate video
output level is obtained with the iris at F/1.8.
4 Loosen the F.B fixing knob.
5 Set the ZOOM selector to the MANU. position.
6 Turn the zoom ring to the telephoto position.
7 Turn the focus ring so that the test chart is in focus.
8 Turn the zoom ring to the wide angle position.
9 Turn the F.B adjustment ring so that the test chart
is in focus. Do not move the focus ring.
10Repeat steps 6 to 9 until the image stays in focus
from telephoto to wide angle.
11After adjustment, tighten the screw of the F.B
fixing knob.
About 3 m (10 feet)
Test chart for flange
focal length adjustment