Canon SD790IS PowerShot SD790 IS / DIGITAL IXUS 90 IS Camera User Guide - Page 97

95 To Cancel the AF Lock Press the / button. z When shooting with the focus lock or AF lock, setting [AF Frame] to [Center] (p. 89) makes shooting easier since the camera focuses using the center AF frame only. z The AF lock is convenient because you can let go of the shutter button to compose the image. Moreover, the AF lock is still effective after the picture is taken, allowing you to capture a second image with the same focus. z The AF frame will not appear in Movie mode. z When shooting through glass, bring your camera as close to the glass as possible and shoot so that there is no reflection from the glass. Various Shooting Methods Locking the Exposure Setting (AE Lock) Available Shooting Modes p. 222 You can set the exposure and focus separately. This is effective when the contrast is too strong between the subject and background or when a subject is backlit. 1 Press the button and select (Flash off). 2 Aim the camera at the subject on which you wish to lock the exposure. 3 Press the shutter button halfway and press the button. • The icon will display. 4 Re-aim the camera to compose the shot as desired and press the shutter button fully. To Cancel the AE Lock Press the button. z In Movie mode, AE lock can also be set/canceled (p. 79). z You can use the FE lock when using the flash.