Canon 155 A User Manual

Page 23

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Switching the AUTO/MANU. Switch

This switch is used to set the prescribed

apertures coupled with AE flash photo

graphy. There are two aperture settings for

AE flash photography: the red position and

green position. (The MANU. position in

the center of this switch should be set when

you perform manual flash photography.)

Reading the Apertures

The aperture fixed by the AUTO/MANU.

switch is the value below the aperture index

mark of the same color as the switch position.

For example, if the AUTO/MANU. switch is

set at the red position, the aperture below

the red aperture index mark is used for

AE flash photography. The aperture will

change depending on the setting of the ASA

film speed. In the case of ASA 100, the

red position is f/2.8 while the green position

is f/5.6.