I guess the oldest goes to Redfield but for the money, nothing beats the current Nikon ProStaff. It has everything you need: Clarity, Great light capture (from dawn til dusk), and can take a beating that the big guns give out and not lose zero. It also has parallax correction out to 100 yards. It gives you all this at $150.00. Nothing as good even comes close until you hit the $275 Leupolds.