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.
Set the iris selector to the M position.
Turn the iris ring to f/1.4 (fully open).
Place the supplied flange focal length adjustment
test chart 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/1.4.
Loosen the screw of the Ff adjustment ring.
Set the ZOOM selector to the M position.
Move the manual zoom control to the telephoto
• 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
About 3 m (10 feet)
Turn the focusing ring so that the test chart is in
Move the manual zoom control to the wide angle
Turn the Ff adjustment ring so that the test chart is
in focus. Do not move the focusing ring.
Repeat steps 6 to 9 until the image stays in focus
from telephoto to wide angle.
After adjustment, tighten the screw of the Ff
Flange focal length
adjustment test chart
Chapter 5 Adjustments and Settings