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Focus Lens Group
Master Lens
Group for PF
A
B
CCD for Camera
The image-forming
plane of the camera
CCD for PF
CCD A for PF
CCD B for PF
Master Lens Group
Focus on the nearside (+)
Contrast
Motor Drive-unit
Motor Drive-unit
Motor Drive-unit
CCD B for PFCCD A for PF
Focus Lens Group
Focus Lens Group
Focus Lens Group
Move to infinity side
Stop
Move to nearside
Position equal to the image
plane of the camera.
Position equal to the image
plane of the camera.
Position equal to the
image plane of the camera.
Position equal to the image
plane of the camera.
CCD B for PFCCD A for PF
CCD B for PFCCD A for PF
Contrast
Contrast
Best focus (O)
Focus on the infinity side (-)
Zoom Lens Group
A half mirror located behind the iris
directs light to CCD A and CCD B.
The CCD's are spaced optically at
equal distance to the image plane of
the camera and are used to measure
image contrast.
Contrast value of CCD B is lower than
CCD A.
Focus on the nearside.
Lens focus will move toward infinity.
Contrast value of CCD A and CCD B is
equal.
Optimum focus
Contrast value of CCD A is lower than
CCD B.
Focus on the infinity side.
Lens focus will move toward the
nearside.
Fujinon’s exclusive Precision Focus Assist is now in the
fourth generation and features improved focusing
response, lower light loss and reduced size. The PF system
is the only focusing system that can maintain focus at any
zoom position from the narrowest to the widest angle.
USER FRIENDLY
PF CONTROLLER
The new focus controller for
Fujinon’s exclusive Precision
Focus Assist provides operators
with a simple to use yet powerful
tool to maintain precise focus in
the most demanding production
situations. The familiar manual
type focus controller has been
adapted to encompass all of the
precise servo features of the PF
lens.
PRECISION FOCUS LENSES
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