Canon EOS C70 Instruction Manual - Page 64
Momentary Automatic Aperture - Push Auto Iris, Automatic Aperture, Mode] > [Manual].
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Aperture Momentary Automatic Aperture - Push Auto Iris During manual aperture, you can press the PUSH AUTO IRIS button to have the camera temporarily take control and adjust the aperture automatically for an optimal exposure. 64 This function is not available when slow & fast motion recording is activated. 1 Select > [v Camera Setup] > [Iris Mode] > [Manual]. 2 When using a lens compatible with automatic aperture, set the lens to automatic aperture mode (A 62). 3 Press and hold the PUSH AUTO IRIS button. • The camera will automatically adjust the aperture to obtain optimal exposure as long as you hold the button pressed down, and E will appear on the screen next to the aperture value. • When you release the button the aperture value will be set, automatic aperture mode will end and the E icon will disappear. NOTES • You can use the > [v Camera Setup] > [AE Response] setting to change how quickly the aperture changes during automatic aperture mode. This setting has no effect when using an incompatible lens (A 203). Automatic Aperture When a compatible lens is attached to the camera, you can have the camera automatically adjust the aperture. This function is not available when slow & fast motion recording is activated. 1 Select > [v Camera Setup] > [Iris Mode] > [Automatic]. • The camera will automatically adjust the aperture to obtain optimal exposure. The selected aperture value will appear at the bottom of the screen with an E icon next to it. 2 When using a lens compatible with automatic aperture, set the lens to automatic aperture mode (A 62). NOTES • If you set an assignable button to [Iris Mode] (A 105), you can press the button to toggle between the [Automatic] and [Manual] settings. • The aperture value may change in the following cases. - While using the built-in extender or iris compensation function of an EF Cinema lens, when you switch from automatic aperture to manual aperture. - When the aperture controls on the lens are switched between automatic/manual mode. • When using EF Cinema lenses that let you adjust the aperture gain, if the aperture gain is set too high, the aperture adjustment may not be stable ("aperture hunting"), depending on the shooting conditions. In such case, reset the lens's aperture gain to its initial value.