The KF models are for those users who put priority on mobility, offering a line-up for users ranging from beginners to advanced amateurs. You can always count on Fujinon to deliver the highest quality lens with its award winning coatings on the new KF series binoculars. With the environment in mind Fujinon has incorporated “eco-glass” that makes all glass material free of any toxins. The KF series are available in a precise center focus system. Like all Fujinon Binoculars, the KF Series are Water Proof. The KF series binoculars are backed with Fujifilm Limited Lifetime Warranty (The warranty does not cover rubber, caps or accessories)