The precision-ground and polished optical glass is coated with Nikon's exclusive Brightvue coating that allows 92 percent light transmission, giving you super clarity and high resolution. Positive, audible, manual 0.25 MOA (Minute of Angle) windage and elevation adjustments eliminate reticle creep or backlash. The Nikon 6430 features Nikon's specially designed Nikoplex reticle that is composed of a thick outer crosshair that steps down to a finer crosshair at the center. This feature leads your eye to the point of focus and allows for quick, easy targeting.

The Nikon 6430 features an adjustable 3x to 9x magnification and a large, 50 millimeter objective lens diameter, giving the scope an exit pupil size of 15.1 to 5.9 millimeters, depending on magnification. A 3x magnification setting on this scope makes the image appear three times larger than with the eye alone with an exit pupil of 15.1 millimeters. At the 9x magnification setting, the exit pupil would be reduced to 5.9 millimeters. The Nikon 6430 is a full-sized scope with an adjustable magnification and exit pupil, making it an excellent choice for low light targeting as well as long distance targeting in fair light.

About Exit Pupil Size
The size of the exit pupil for a riflescope is determined by dividing the objective lens diameter by the magnification rating. The human eye pupil diameter ranges from 2 to 7 millimeters, depending on the amount of light. For proper light gathering potential, the diameter of the scope's exit pupil must be equal to or greater than the diamet