For long range shooters the new Ventus device from Trijicon is a godsend as usually these types are available for military use... "Powered by WindPro™ Technology, the Trijicon Ventus™ provides shooters and hunters with previously unattainable data about their environments to improve long-range accuracy. The Ventus™ is designed with a Doppler LIDAR engine that can measure headwind, tailwind, crosswind and vertical wind components at six different distances in front of the user. In any weather condition.