The flash coverage angle is automatically set according to the focal length of the lens mounted on the camera and the setting is displayed in the LCD panel. Also when a zoom lens is used, the flash coverage angle automatically changes when the lens is zoomed and the new setting is displayed in the LCD panel
When the 540EZ is used with and EOS camera , you can select whether to have the flash fire as soon as the shutter opens (first curtain sync) or immediately before the shutter closes (second curtain sync) When using a also shutter speed with a moving subject, second-curtain synchronization will provide a more natural effect because the flash exposure occurs at the end of the subject movement rather than at the beginning providing a "trailing blur" effect that emphasized motion.
The SE function automatically turns off the power after 90 seconds of non-operation to prevent unnecessary battery consumption. The LCD panel display also goes off when the SE function activates. The power comes back on when the camera's shutter button is pressed halfway or the test firing button is pressed
not more than 40 continuous flashes 1. Set the camera's shooting mode to aperture-priority AE mode (Av) or manual exposure mode (M) 2. Set the flash mode to manual (M)
