I tig weld in a shipyard shop for 8-10 hours a day. I had been using a cheap Amazon lens and by the middle of the day my eyes were watery, stinging, burning, red, and tired. Decided I would finally upgrade and stumbled upon this lens. I've loved it so far and even the older guys that have been welding for 20+ years are impressed with the clarity. My only complaint is that straight out of the package it did have some minor scratches which was a disappointment because there's nothing more satisfying than seeing that brand new, unscathed lens. Maybe next time. Great lens and I would recommend to anyone that's going to be welding for long periods of time. It really can't be beat.