Qu’est-ce que la VLT dans les masques de ski, et quelle teinte de verre vous faut-il ?

You’re standing at the top of the lift, and the forecast lied again. The morning sun is brutal off the fresh snow, but there’s a cloud bank rolling over the ridge that will flatten the light by noon. Your buddy squints through a near-black mirror lens while you dig a second lens out of your […]