Rambler 8x42The Rambler¢â series of compact binoculars are the perfect combination of performance, quality and affordability that provide proven performance for better results where it counts¡¦ in the field! SPECIFICATIONS Lens diameter, mm 42 Magnification, x 8 Eye relief, mm 18 Exit pupil diameter, mm 5.25 Real angle of view, degrees 7.4¡Æ Field of view at 1000 yard distance, yard 141 Focus range, yard 1.2 to inf. Twilight factor 18.3 Diopter adjustment, dptr ¡¾ 4 Operating temperature,¢ªF -22¢ª to +105¢ª Dimensions, in 5.5¡± x 5.0¡± x 1.9¡± Weight (w/out packaging), oz 25 The Rambler¢â series of compact binoculars are the perfect combination of performance, quality and affordability that provide proven performance for better results where it counts¡¦ in the field! Only the highest quality multicoated optics are used in every Rambler binocular, advanced with broadband technology to increase light transmission throughout the visible spectrum, resulting in truer color representation and a brighter image for the user. A wide field of view paired with a long eye relief further enhances the image being viewed while also making it easier to see objects at all distances. The ribbed rubber armor on the Rambler¡¯s body not only ensures a firm gripping area but also acts as a shock absorber against dropping or everyday wear. The large, ribbed focus wheel is easy to use, even while wearing gloves; and the roof prism design makes for a slimmer, easier to handle product. The dual twist-up eyecups easily adjust to each user¡¯s personal eye relief setting and are protected by attachable eyepiece and objective lens covers. The Rambler is exactly what every quality and feature savvy outdoorsman needs! FEATURES Rubber armored body Multicoated lenses BaK-4 roof prisms Central focusing knob Nitrogen filled and O-ring sealed for 100% waterproof / fogproof / dustproof construction