Similar to Zavio Mega-Pixel Vari-Focal Lens 3.1mm to 8mm

# M201 When the sunlight changes, the tint changes. Each lens has a variable tint with particles that interact with the light as it hits the lens. The brighter the sun, the darker the tint. As the light dims, the tint fades, providing a clear view. They also block dangerous UV rays and filter Harmfu...