There's a few potential problems:
- The ability to change slows and fades with time.
- You have to be extra careful cleaning your shield, both with what you clean it with (as that could effect the film), and just being careful what you're doing so as not to scratch it.
- The changing process is quicker to darken than to lighten, that's why you see the ads on TV with the disclaimers about "elapsed time". The coating/film doesn't distinguish between sunlight and any other light. I had a friend that had those kind of glasses and he learned not to wear them to the movies because if there was a night scene followed by a bright scene his glasses would darken so much, and so quick, that he had to remove them for a bit to see the screen.
So the problem can be riding at night, when you're going to have oncoming traffic shining their super-bright headlights on you. That film is going to darken, potentially a lot. It won't lighten quickly, hindering your ability to see.
Some states prohibit tinted helmet shields as night, light responsive or not.
Last edited by Majicbringer; 08-29-2007 at 04:42 PM.
| 
Linear Mode
