Porro prisms 

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Multicoated optical system High-grade BaK-4 prisms Large aperture, ideal for low light conditions and astronomy Long eye relief, ideal for spectacle wearers Dioptric adjustment to compensate for different levels of visual acuity
Easy to Use Center Zoom Lever BaK4 prisms for crystal clear images. Zooms from 10X to 30X Close focus under 10 feet. Tripod adaptable for high power, long observing sessions.
An ideal choice for beginning astronomy Suitable for nature viewing Sharp and clear views Lightweight and usable on hand (It's recommended to use a tripod for observing celestial objects)
BAK4 Prism Glass Porro Prism Design Fully Multicoated Optics Waterproof Housing Center Focus Wheel Twist-Up Rubber Eyecups 18mm Eye Relief
for astronomers, hunters, birdwatchers and adventurers robust and shock-resistant binoculars nitrogen-filled for use in any weather from the small to the enormous - for nature-watching and astronomy high optical performance. brilliant and sharp images, right out to the edge stable focusing due to individual eyepiece adjustment each pair of binoculars...
$ 71 $ 84 -15%
50x Magnification bright view ability to see clear even in dim light Powerful zoom with different magnifications ideal for all outdoor activities and sporting events Fully coated optics for crisp and sharp images Ruby lens to minimize glare Includes carrying case and neck strap
     High resolution coated optics      Impact resistant and rubber armored-50mm objective lenses-Comes with a soft case, neck strap, and lens caps
Porro Prisms Wide-Angle FOV Multi-Coated Optics Rubber Covered Aluminum Body Water Resistant Rubber Eyecups Ergonomic thumb indents and finger ridges for extra non-slip comfort and ease of use Water resistant Soft carrying case Binocular straps
$ 26
Out of stock
Reverse Porro Design BK7 Prism Glass Multicoated Optics Waterproof Housing Center Focus Wheel Twist-Up Rubber Eyecups 10mm Eye Relief
$ 149
Out of stock
BAK4 Porro Prisms Wide Angle FOV Multicoated Optics Tripod Adaptable Center Focus
Showing 1 - 12 of 52 items