The Vivitar Aqua Series AV-830 8x 30mm Waterproof and Floating Binocular is a durable yet cost-effective outdoor optic designed for nature enthusiasts. The lightweight housing is nitrogen purged and o-ring sealed for waterproof and fogproof performance. A grooved center focus wheel is ergonomically-placed, making rapid and precise focus adjustments easy even when the operator is wearing gloves. Multicoated optics transmit bright images that are clear and rich with detail. A short minimum focus distance, supple rubber eyecups and compact size make the 8x30 a full-featured binocular for outdoor applications on-the-go.