Nikon has a complete line of optics The Nikon ProStaff 1000 Rangefinder has an effective range from 6-1,000 yards and a magnification of 6x. Tru-Target Technology allows you to switch between Distant Target Priority mode and First Target Priority mode depending on conditions. Distant Target Priority mode is useful in wooded or grassy areas where the target may be partly obscured by undergrowth. First Target Priority mode measures the distance of the closest subject when theres an overlapping background. Hold the power button down and get continuous measurement readings for up to 8 seconds. The Nikon ProStaff 1000 Rangefinder utilizes multi-layer lens coatings to give you bright clear images. The unit also offers IPX4 rainproof protection. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Rangefinders.