Adjusting The Flange Focal Length - Sony BVP-550 Operation Manual

3-6 Adjusting the Flange Focal Length

4-3 Delete play
You should adjust the flange focal length
•mounting a lens for the first time;
•changing the lens; or
•the lens does not stay in focus when zooming from
telephoto to wide angle.
To adjust the flange focal length, proceed as follows:
1
Set the iris to manual and open it to the maximum.
2
Position a flange focal length adjustment chart
about 3 m (10 ft) away from the video camera and
illuminate it brightly enough to provide an
appropriate video output level.
3
Loosen the fixing screws on the Ff (flange focal
length) adjustment ring.
4
Use manual or power zoom to set the lens to
telephoto.
5
Point the camera at the chart, and focus on the
chart.
..........................................................................................................................................................................................................
1) Flange focal length
The distance from the plane of the lens mounting flange
to the imaging plane.
3-10
Chapter 3 Setting Up the Video Camera
1)
when:
Note
The location of the controls for adjusting the flange
local length differ according to lens. For details on the
location of the controls, refer to the instruction manual
supplied with the lens being used.
About 3m (10 ft)
Adjusting the flange focal length
6
Zoom to wide angle.
7
Turn the Ff adjustment ring until the chart is in
focus. Be careful not to disturb the focusing ring
at this time.
8
Repeat steps 4 to 7 until the chart stays in focus
while zooming from wide angle to telephoto.
9
Tighten the Ff ring fixing screws.
Letter Ver.3.0 3-810-005-11(1)