According to Nikon, the 12x50 SE utilizes the same mechanical and optical performance features of the eight and ten power models in larger objective version particularly adaptable and suited to tripod use.
Nikon's 12x50 SE Porro prism binocular incorporates the same advanced optical design and engineering technology that has made the 10x42 and 8x32 SEs so popular with serious birders.
Prominent on the list of features found on the central focus 12x50 SE is a unique eyepiece design that provides the viewer with a flat, clear image, especially at the edges of the viewing field. In addition, this binocular has very long (17.4mm) eye relief in relation to its power, making it possible for eyeglass wearers to enjoy the five degree angle of view and generous field of view (261 ft.@ 1,000 yds.)
Nikon's click-movement diopter control is utilized in the 12x50 SE, locking the diopter setting in until the viewer wishes to change it and providing total viewing consistency. This control is located on the SE's right eyepiece and is also essential to compensate for common left eye/right eye vision imbalance.
Twelve power magnification coupled with 50mm objective lenses provides a substantial 4.2mm exit pupil. Nikon's exclusive method of coating all lens and prism surfaces with multiple layers of proprietary anti-reflective coatings delivers maximum brightness, high contrast, true color rendition and flare free viewing from dawn to dusk. The Superior E utilizes precision formed BaK4 high index prisms for clear, round images free of vignetting as well.
To reduce weight, Nikon builds the 12x50 chassis from a lightweight, but extremely strong magnesium alloy. Total weight of the 7.2"x 8.0" binocular is only 31.7 ounces. The 12x50 Superior E is ergonomically shaped for proper balance, but is also readily tripod adaptable. Additionally, for an added measure of protection and sure grip, the 12x50 SE features a unique protein rubber external coating.