12x42 High Definition Binoculars for Adults with Phone Adapter and Tripod- Super Bright Binoculars with Large View- Lightweight Waterproof Binoculars for Bird Watching Hunting Stargazing Hiking Sports 【16.5mm Big BaK4 Prism HD Binoculars, Super Bright, Crisp View】Collect 32% more light than 12.5mm prism lens (e.g. 10x25, 12x25, 10x21 binoculars), 13.7% of 14.5mm prism lens (e.g. Ordinary 10x42, 12x42 binoculars). 16.5mm Prism lens take 100% advantage of 42mm objective lens, collect more lights, deliver brighter view.
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