It is auto darkening. It has an adjustment knob that goes from 9 - 13, but it doesn't seem to do anything. And a switch that has two positions, normal and fast. That one does change how fast it goes dark, but not how dark it goes.
I have a pack of replacement lenses and use them. Before it goes dark I can see fine through it. It just goes too dark, to where I really can't see my welds or where I'm putting them. And it's always been like that. I'm just finally tired enough of it to get something better.
- DAA