Bushnell All Purpose 10x42 Binoculars. Bushnell® designed their All-Purpose™ Binoculars for hunters and shooters who value simplicity, stability, and results. All-Purpose binoculars feature multi-coated lenses and BaK-7 prisms for bright clear viewing. An ergonomic design and center focus wheel get you on target and fine-focused in an instant. Twist-up eye pieces accommodate eyeglass users. All-Purpose Binoculars are nitrogen-purged to resist fogging.