Canon Pro90 PowerShot Pro90IS Camera User Guide - Page 76

Shooting Problem Subjects for the Autofocus The autofocus may not work well on the following types of subject. - Subjects with extremely low contrast to the surroundings - Subjects mixing close and far objects - Subjects with extremely bright objects at the center of the composition - Subjects that are moving quickly To shoot these subjects, first aim the camera at an object at a similar distance, lock the focus and recompose the image with the desired subject, or use the manual focus. • When shooting through glass, approach as closely as possible to avoid reflections off the glass. Shooting with Focus Lock Focus Lock Method 1 1 Aim the center of the LCD monitor or viewfinder at an object at a similar distance to the subject you wish to shoot. 2 Press the shutter button halfway to lock the focus. • The AE setting will also lock when you do this. The exposure may occasionally be incorrect if the difference between the two items is too great. Use method 2 or the AE lock procedure when this happens. 3 Keep it pressed while you recompose and press the shutter button all the way to shoot the image. Focus Lock Method 2 1 Aim the center of the LCD monitor or viewfinder at an object at a similar distance to the subject you wish to shoot. 2 Press the shutter button halfway to lock the focus. Keep it pressed and press the button. • The icon will appear in the display panel, and the icon in the LCD monitor or viewfinder. • The focus setting will lock even if the shutter button and MF button are released. • The manual focus setting will cancel if the MF button is pressed again. 74 Shooting - Selecting Particular Effects