When the lens is first attached, adjust the back focus of the lens if the focus is not clear when zoomed to the telephoto or wide angle end.
Adjusting Back Focus
TOPPlace an object 3 m and above away from the camera recorder.
The Siemens Star Chart is most suitable as the subject.
Set the [ZOOM SERVO/MANUAL] switch to “MANUAL”.
Press and hold down the [IRIS] button, and press the [F.f] back focus button until the indicator lamp lights up (approx. 1.5 seconds).
Turn the zoom ring to set the lens to the maximum telephoto position.
Turn the focus ring to adjust the focus of the object.
Turn the zoom ring to set the lens to the maximum wide angle position.
Adjust the back focus using the iris ring to set the focus on the subject.
Repeat steps 
to 
a few times until focus is set on both the telephoto and wide-angle ends.
to a few times until focus is set on both the telephoto and wide-angle ends.Turn the zoom ring and check if the image is blurry at the telephoto end at the 20 mm scale mark.
If blurring occurs, turn the iris ring to adjust the focus. (It is recommended to set the zoom ring near the 40 mm scale mark.)
Press the [F.f] back focus button until the indicator lamp goes off (approx. 0.5 second).
Memo
The iris is fixed at the maximum position. Adjust the lighting, shutter and gain to obtain an appropriate video level.
