Automatic color filter for the welding helmet ADA Filter WM darkens at once at arc striking and clears up when the welding is over. Color filter darkens with speed 1/25000 sec at the time of welding start, time delay of blooming: 0.2-0.5 sec. High-technology electro-optical color filter protects eyes against ultraviolet and infrared rays during the whole process of welding. Usage of solar batteries makes the filter independent from battery. Automatic switching-on.