Sony 300PF User Manual

Chapter 5

Adjustments and Settings

107

Chapter 5 Adjustments and Settings

RET

M

A

S

M

ZOOM

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

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
position.

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

Move the manual zoom control to the wide angle
position.

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

Repeat steps 

 to 

 until the image stays in focus

from telephoto to wide angle.

After adjustment, tighten the screw of the Ff

adjustment ring.

About 3 m (10 feet)

Flange focal length
adjustment test chart