Vortex Optics Diamondback 8x28 Roof Prism Binocular http://www.amazon.com/gp/product/B002SCWWH2?tag=sukses2015-20 Phase corrected prisms increasing light transmission by 7 deliver sharp greatly contrasted images BaK-4 prisms provide sharp images from one edge of the broad viewing field to the other Fully multi-coated optics increase light transmission for higher image quality in all lighting conditions - enhanced for 2009 Complete waterproof protection keeps dust and water out of the optical system with tight O-ring seals Complete fogproofing of internal lenses with argon-purged optics presents clear views in spite of sudden temperature changes
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