Flip-up solution with a big (17 x 10 cm) curved, proective visor, increasing your peripherial vision.
Speedglas welding filter 9100V (45x93 mm): variable dark shade 5, 8, 9-13 for most types of arc welding
Possible to lock-in any shade, e.g. in the light state 3 when grinding. Delay function to set the dark-to-light opening time.