This is the one I use. It has what's called an "X-Mode". It picks up the electro magenetic field created through the ground cable and goes dark. You can cover all the light sensors up and it will still go dark in X-Mode. I know it sounds like a bunch of bullshit but it works. More money than a Speedglass but it's been worth every penny.
LOL!!! Unfortunately, something similar has already been done:
http://www.nytimes.com/2007/08/07/world/asia/07cnd-thai.html
http:///www.youtube.com/L0KI619
I'm pretty sure that's as old as the first time 3 cave men went out hunting and one of them threw the spear with the pointy end facing the wrong way.
It could be worse. It could be a 3M shield.
I'd be tempted to wear it just to get back to using Speedglass again.
Lol, I won't even use a Speedglass anymore. I've switched to Miller Elite Digital Series. I kept getting flashed when TIG welding with the Speedglass.
Speedglass does have a very slight delay even with it turned all the way down. Plus, you can't adjust where the sensor is so it can easily be blocked.
But is still beats this ninja turtle looking piece of shit
Ya that's terrible.
This is the one I use. It has what's called an "X-Mode". It picks up the electro magenetic field created through the ground cable and goes dark. You can cover all the light sensors up and it will still go dark in X-Mode. I know it sounds like a bunch of bullshit but it works. More money than a Speedglass but it's been worth every penny.