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

4,11

2

1

3

About 3 m (10 feet)

9

 

 

 

Flange focal length

 

 

 

 

 

 

 

 

adjustment test chart

 

 

T

A

 

RET

W

M

IRIS

 

 

 

 

 

 

 

 

 

8

6

7

5

ZOOM

SERVO MANU.

Settings and Adjustments 5 Chapter

1 Set the aperture selector to the M position.

2 Turn the aperture ring to f/1.8 (fully open).

3 Place the supplied flange focal length adjustment test chart at a distance of about 3 meters (10 feet), and adjust the lighting so that an appropriate video output level is obtained with the aperture at f/1.8.

4 Loosen the F.B fixing screw.

5 Set the ZOOM selector to the MANU. position.

6 Move the manual zoom control to the telephoto position.

7 Turn the focusing ring so that the test chart is in focus.

8 Move the manual zoom control to the wide angle position.

9 Turn the F.B adjustment ring so that the test chart is in focus. Do not move the focusing ring.

10Repeat steps 6 to 9 until the image stays in focus from telephoto to wide angle.

11After adjustment, tighten the F.B fixing screw.

82

Chapter 5 Adjustments and Settings