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IRIS GAIN CONTROL IN A LENS
An iris gain control hole is usually provided in the front
of the lens. Adjustment of the iris gain, with a screwdriv-
er through the hole may be done as follows. (Shape
and location of the hole may vary depending on the
type of lens.)
1. Turn the iris selection switch to Position A (AUTO).
2. Rotate the iris gain control to the maximum gain,
but in a range where no hunting or oscillating of the
iris ring develops.
Iris gain control (G, S)
Automatic iris power zoom lens