With an auto shooting distance range of 0.5 to 9 m, the Canon Speedlite 188A flash renders appropriate brightness to the subject under focus. Get clear and crisp output with this Canon electronic flash unit that has an aperture range between f/1 to f/16. This Canon flash delivers maximum possible light to pictures with the flash duration ranging from 1/700 sec. to 1/50000 sec. This Canon electronic flash unit comes with a built in special colored diffusion screen which adjusts the color temperature automatically as per daylight. This Canon flash is equipped with a pilot lamp allows the camera to automatically switchover to flash mode and also works as a flash test button when the flash is on. The Canon Speedlite 188A flash comes with an AE-1 program which makes a flash mark that lights up in the camera viewfinder to ensure sufficient illumination for the desired shot.