The Nikon WX IF 7×50 and 10×50 binoculars offer individual eyepiece focus and a flat field. Choices available are 7×50 and 10×50. The medium power and 50mm lens offer great low light capability. Eye relief is 15.3 – 17.7mm.
Other key specs include ED glass (triplet) field flattner and high quality fully multi-coated optics. Prisms and phase coated BaK-4. Nitrogen gas filled for a depth of 5m for 10 minutes. A 55mm filter (P=0.75) can be attached to objective lens. Employing eyepieces with superior optical performance, a super-wide field of view (apparent field of view of 66.6° for WX 7×50 IF, 76.4° for WX 10×50 IF) is achieved.
Minimising astigmatism and coma aberration, a sharp and clear image is realised, while the sharpness of the image at the centre of the field is achieved all the way to the periphery of the super-wide field of view. Without perceiving the frame, you can experience a feeling as if you are spacewalking into a starry sky.