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Nikon Buckmaster 4.5-14×40 Riflescope

Product Description
Some models available with BDC reticle (bullet drop compensating) Guaranteed waterprooof, fogproof and shockproof.Amazon.com Product Description
The Nikon 6469 4.5 to 14 x 40 Buckmasters side-focus Mildot matte riflescope is a rugged, waterproof, shockproof and fogproof scope. Put through an advanced vacuum process that removes virtually all air and water molecules, the scope's tube is then filled with nitrogen and O-ring sealed. This process ensures that the Nikon 6469 will perform under the most stringent of field conditions without suffering any effects of fogging or condensation.

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 scope features Nikon's specially designed side-focus parallax adjustment for even greater targeting ease. Just set the adjustment at the distance you will be shooting from and your targeting will be clear and accurate.

The Nikon 6469 features an adjustable 4.5x to 14x magnification and a large, 40 millimeter objective lens diameter, giving the scope an exit pupil size of 8.9 to 2.9 millimeters, depending on magnification. A 4.5x magnification setting on this scope makes the image appear four and a half times larger than with the eye alone with an exit pupil of 8.9 millimeters. In other words, objects at 100 yards appear to be only 22 yards away through a 4.5x scope and the Nikon 6469 would work well at this magnification in almost any light. At the 14x magnification setting, the exit pupil would be reduced to 2.9 millimeters. The Nikon 6469 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 full 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 diameter of your eye pupil at the light level you will be using the scope. If you're working in low light, your exit pupil size will be of greater importance. With an adjustable 8.9 to 2.9 millimeter exit pupil, the Nikon 6469 4.5-14 x 40 Buckmasters side-focus Mildot matte riflescope is an excellent choice for hunting in low light or long distance hunting in full light.