Editorial Reviews:
Product Description
PRODUCT FEATURES:Rugged waterproof, shockproof and fogproof tube is nitrogen-filled and O-ring sealed for maximum performance under all field conditionsPrecision ground and polished optical glass is coated with Nikon's exclusive Brightvue for 92% light transmission, super clarity and high resolutionPositive, audible hand-turn 1/4 MOA click windage and elevation adjustments eliminate reticle creep or backlashNikoplex reticle for quick, easy target acquisition under all lighting conditions at all rangesNo-glare, scratch-resistant matte finishSuperior scopes, superior values100% waterproof, fogproof performanceNikon Brightvue anti-reflective multicoating1/4-minute, steel-to-brass, positive click adjustmentsFull-sized scope with large 10mm exit pupil is excellent for timber, brush and low lightLarge field of view at 100 yards for acquisition of running gameExcellent for muzzleloaders and shotguns tooAttractive pricing, excellent valueIncludes the Nikon Fog Eliminator wipe to eliminate EXTERIOR fogging in even the most extreme conditions
Amazon.com Product Description
The Nikon 6400 4 x 40 Buckmasters 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 6460 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 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 6400 features a 4x magnification and a large, 40 millimeter objective lens diameter, giving the scope an exit pupil size of 10 millimeters. A 4x scope makes the image appear four times larger than with the eye alone. In other words, objects at 100 yards appear to be only 25 yards away through a 4x scope. The Nikon 6400 is a full-sized scope with a large exit pupil, making it an excellent choice for timber, brush and low 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 a 10 millimeter exit pupil, the Nikon 6400 4 x 40 Buckmasters matte riflescope is an excellent choice for hunting in low light.
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