Telescope Bak4 Prism Zoom,Hunting Bird Watching,10-30X50 Binoculars,Astronomical Telescope,High-Definition Night Vision

2: Central focusing wheel, when viewing the target, it will turn back and forth until the target is clear and stop the adjustment. You need to repeat this operation to see different distances.1:50MM large objective lens, coated with multi-layer broadband blue-purple film, large amount of light, high-definition and bright images, true color reproduction, giving a fresh and comfortable horizon.3: Multiplier adjustment gear, freely