FujiFilm ZA12X4.5B RM/RD specifications Precision Focus Lenses, User Friendly Pf Controller

PRECISION FOCUS LENSES

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.

Focus Lens Group Master Lens Group

Zoom Lens Group

Master Lens
		A
Group for PF
			B
Focus on the nearside (+)			Position equal to the image
			plane of the camera.
	Focus Lens Group
		CCD A for PF		CCD B for PF

Move to infinity side		Contrast
Motor	Drive-unit
Best focus (O)	Position equal to the image
	plane of the camera.
Focus Lens Group
	CCD A for PF	CCD B for PF

Stop	Contrast
Motor	Drive-unit

The image-forming plane of the camera

CCD for Camera

CCD for PF CCD B for PF

CCD A for PF

Position equal to the image plane of the camera.

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.

Focus on the infinity side (-)

Position equal to the image plane of the camera.

Optimum focus

Focus Lens Group

CCD A for PF CCD B for PF

Move to nearside		Contrast
Motor	Drive-unit

Contrast value of CCD A is lower than CCD B.

Focus on the infinity side. Lens focus will move toward the nearside.

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.

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