Panasonic AK-HC910L - Manual (Page 14)

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Flange back adjustment (for zoom lens)
The adjustment is to adjust the focus in all the range from the maximum zoom to the
widest angle of the zoom lens.
1 Shoot a dark object to open the iris.
2 Adjust the distance from the object to 2m at least, then loosen the flange back fixing
knob of the lens.
3 Set the lens to the maximum zoom and adjust the focus by turning the focus ring.
4 Set the lens to the widest angle and adjust the focus by turning the flange back
adjust ring.
5 Repeat adjusting the focus ring and flange back adjust ring until the focus is
adjusted within the zooming range.
After finishing the adjustment, tighten the flange back fixing knob.
How to Adjust
Focus Ring Flange Back Fixing Knob
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Lens iris gain volume adjustment
• Iris gain adjust hole (G or S) is provided at front of the lens housing. Adjust the iris
according to the following procedure by using a screwdriver.
1 Set the iris select switch of the lens to A “AUTO” side.
2 Turn the iris gain adjust volume to maximize the gain in such extent that no hunting
takes place.
* Iris PEAK/AVE of camera menu can also be used for the adjustment.
Flange Back Adjust Ring
Iris Gain Adjust Volume
Auto Iris Power Zoom Lens