Depth of Field Preview

Press the depth-of-field preview button to stop down to the current aperture setting. The diaphragm in the lens will be set to the current aperture so you can check the depth of field range of acceptable focus through the viewfinder. In the lt A-DEP gt mode, press the shutter button halfway to focus, then press the depth-of-field preview button while still pressing the shutter button halfway. The exposure is locked AE lock while the Depth-of-Field Preview button is pressed. ' In this mode, you...