Adjusting The Flange Focal Length - Sony PMW-350K Operating Instructions Manual

lens is firmly locked. It is recommended that
the lens mount securing rubber be put on the
lens locking lever as illustrated above.
4
Connect the lens cable to the LENS
connector.
5
Secure the lens cable with the cable
clamps.
If you have attached an aberration correction
lens
The aberration correction function is activated
automatically. Starting the camcorder with an
aberration correction lens may require more time
than normally because of data loading at start-up.
The lens supplied with the PMW-350K is an
aberration correction lens. Contact a Sony service
representative for information about other
aberration correction lenses.

Adjusting the Flange Focal Length

If the lens does not stay in focus properly as you
zoom from telephoto to wide angle, adjust the
flange focal length (the distance from the plane of
the lens mounting flange to the imaging plane).
Make this adjustment just one time after
mounting or changing the lens.
When carrying out the adjustment, use the
supplied flange focal length adjustment chart as
the subject.
Notes
• If you use a subject with insufficient contrast, or
move the camcorder or subject during
adjustment, this will cause an adjustment error.
• Place the subject (the flange focal length
adjustment chart) so that it appears at the center
of the screen at the telephoto end. Arrange so
that no nearby object (no object closer to the
About 3 m (10 ft)
camera than the chart) enters the screen at the
wide-angle end.
Carrying out the adjustment
When using the auto focus lens
With the lens supplied with the PMW-350K,
zoom and focus operations automatically adjust
the flange focal length.
1
Open the iris, position the supplied
flange focal length adjustment chart
approximately 3 meters (10 ft) away
from the camcorder, and arrange the
lighting to obtain a satisfactory video
output.
2
Set the ZOOM switch to SERVO
(power zoom mode).
3
Hold down the flange focal length
adjustment button for 3 seconds.
The flange focal length adjustment starts.
During adjustment
The message "AUTO FB Adjust
EXECUTING" appears on the viewfinder
screen.
If the adjustment completes correctly
The message on the viewfinder screen
changes to "Auto FB Adjust: OK".
If the flange focal length adjustment does
not complete correctly
Check the subject and lighting conditions,
and repeat the adjustment.
When using a non-auto focus lens
1
Set the iris to manual.
2
Open the iris, position the supplied
flange focal length adjustment chart
approximately 3 meters (10 ft) away
from the camcorder, and arrange the
lighting to obtain a satisfactory video
output.
3
Loosen the fixing screws on the F.f or
F.B ring (flange focal length adjustment
ring).
Mounting and Adjusting the Lens 39