Frangeback Adjustment; Video Signal Type Lens Adjustment - Hitachi HV-D25 Operation Manual

Flangeback adjustment
If focus cannot be adjusted after replacing the lens or at the telephoto and wide angle extremes of a zoom lens,
the flangeback can be adjusted. Open the lens iris and adjust as described below.
Fixed focus lens
Set the lens focus ring to infinity and pickup an image more than 20 meters distant. While observing the
picture, adjust the focus by turning the flangeback ring in the F or N direction.
Zoom lens
1) Set the lens to telephoto and pickup an image more than 3 meters distant. Turn the focus ring to adjust
the focus.
2) Set the lens to wide angle and while using care not to disturb the focus ring, turn the flangeback ring to
adjust the focus.
Repeat the above steps until focus is obtained at both the telephoto and wide angle ends.

Video signal type lens adjustment

Adjustment is required after replacing the lens or if using the camera for the first time.
1) Preparation
(1) Release the AGC mode (set the main menu Gain to Normal, High or Max).
(2) If the light source has a flicker component (e.g., fluorescent or mercury lighting), change the
electronic shutter mode (Sub-menu 1 Shutter or Variable) to reduce the flicker.
(3) Adjust the white balance.
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