Canon CN20x50 Series Руководство по эксплуатации - Страница 23

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5 OPERATION

5-3-2. Manual Iris Operation

Iris Ring

Instant Auto-Iris Switch

This adjustment can be performed on the information display. Refer to the "Information Display Manual".

5-4. EXTENDER OPERATION

The lens is equipped with a built-in 1.5x extender. The focal length of the lens can be extended to 1.5

times by operating the extender. Note, however, that using the extender lowers the T number by an

amount equivalent to the change in focal length, depending on the iris compensation setting.

Extender

Switching

Lever

Slide the iris operation mode change-over switch to the "M"

position. The iris operation is performed by turning the iris ring on

the lens body.

Open

When the instant auto-iris switch is pressed during manual iris

operation, the iris changes to automatic operation mode while the

switch is held down.

* The automatic iris operation may not be performed depending on

the types of cameras.

Operation

The extender is operated by moving the extender switching

lever at the rear of the lens. When the extender switching lever

is on the 1.5x index side, the state of the lens is equivalent to

having a 1.5x extender mounted.

Note that moving the extender switching lever to the 1x index

side removes the 1.5x extender and returns to lens to the

master lens state.

NOTE

The iris operation mode change-over switch must be set to

the "M" position before performing manual iris operations.

The lens may be damaged if manual iris operations are

forcibly performed with the knob at the "A" position.

E16