Fujinon's 7x28 DIF (CID) Binoculars with Reticle deliver high optical quality and meet military requirements for strength, performance and reliability. For maximum light transmission and image brightness, all optical surfaces are coated with magnesium fluoride. The lenses and BaK-4 prisms are sealed within light alloy housings from which all air, moisture and contaminants have been purged by dry nitrogen. The eye pieces are O-ring sealed. 100% waterproof and impervious to temperature extremes from -40 to 70 degree Celsius, the 7x28 DIF Binoculars are designed for use in harsh environments. Easy-To-Use Features For more comfortable grip as well as added protection against impact, the binocular housing is covered with a strong, durable rubber coating.
The eyepieces provide a focusing adjustment range of +/-4 diopters with 1-diopter calibration markings. Once adjusted for the operator's vision, no further focusing is required until the binocular is used by another operator. For Military and Law Enforcement The 7x28 DIF Binoculars come from Fujinon, an optical company whose products are widely used by U. S. military and law enforcement bodies including the Army, Navy, Coast Guard, DEA, FBI, Border Patrol, Customs, NASA and others.