Canon EOS 20D EOS DIGITAL Software Instruction Manual (EOS Viewer Utility 1.2. - Page 78

Personal Function Settings Illuminates the LCD panel during bulb exposures O After the bulb exposure starts, press the button to illuminate the LCD panel until the bulb exposure ends. O Convenient when you want to monitor the elapsed bulb exposure time. Taking bulb shots for long periods speeds up battery charge depletion and reduces the number of available shots. Sets the default settings when the CLEAR button is ON O You can use this function to select the default mode selected when you press the CLEAR button (QUALITY+WB). O Convenient when you want to instantly switch to frequently-used settings. Shortened release time lag O Normally, the shutter-release time lag is controlled for stability. This Personal Function eliminates this control. As a result, the shutter-release time lag can be reduced by as much as about 20 percent when the aperture needs to be stopped down by no more than 3 stops. O This is effective when a shorter shutter-release time lag is more important than a stable shutter-release time lag. O This function is compatible with the EOS-1Ds Mark II and EOS-1D Mark II only. Since the difference is in 10-millisecond increments, the time lag may not feel any shorter. W-72