Automatic darkening and lightening welding helmet for manual migmag and tig welding the lcd master 11 protective helmet offers optimum protection for manual mig mag and tig welding applications from 10 175 a its filter automatically darkens when the arc is ignited and brightens again when it stops technical specifications classification 1112 light level 3 darkness 11 shutter speed 05 ms opening time automatically field of view 100 x 49 mm power solar weight 470 g light sen