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Chapter 6 Maintenance
6
6-5
Testing the iris and zoom functions
1 Set the zoom to automatic zoom mode and check that the power
zoom operates correctly.
2 Set the zoom to manual zoom mode and check the zoom functions
manually.
3 Set the iris switch on the lens to AUTO and point the camera at
objects of different brightness. Check that the automatic iris
adjustment operates correctly.
4 Set the iris switch on the lens to MANUAL and check that turning
the iris ring manually adjusts the iris correctly.
5 Hold down the instant automatic iris button on the lens and point the
camera at objects of different brightness.
Check that the iris ring turns as the instant automatic adjustment is
made.
6 Set the iris switch on the lens back to AUTO and check the
following points when the GAIN selector is moved from L to M to
H.
• For objects of the same brightness, the iris is adjusted to
correspond to the change in setting.
• The gain indicator on the viewfinder screen changes to correspond
to the change in setting.
7 If an extender mechanism is incorporated in your lens, put it into the
operative position and check the effect.