The best I've found are from Costa Del Mar in West Palm Beach Florida. Living in Florida you have to deal with the bright sun constantly. I use the amber glass lens. They enhance color and I've never lost site of my planes in any sky conditions. They are pricey around $150.00 but have a lifetime warranty against breakage. Find them at http://www.costadelmar.com/ They are also great for fishing as they cut all the glare and are 100% UV resistant.