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- Bushnell Powerview...Walmart$90.98
- Fujifilm Fujinon Mariner...Amazon.com$229.95
- Nikon Monarch M7 8X42 ...Amazon.com$486.95
- Simmons Optics Prosport...Walmart$32.92
- Pentax 8X40 SP Series ...Adorama Camera$79.00
- Olympus 8X40 Explorer S ...B&H Photo-Video-Pro A$109.99
- Bushnell Powerview 2 ...Bass Pro Shopping$69.99
- Nikon Aculon A211 10X42 ...DICK'S Sporting Goods$99.99$119.99
- Vortex Vanquish 8x26mm ...Optics Planet$129.99
- Nikon 8X42 ACULON A211 ...Adorama Camera$89.99
- Rothco 8-24x50mm Porro ...Optics Planet$114.99
- Nikon Monarch HG 8X42 ...Amazon.com$986.95
- Bushnell Powerview WA...Optics Planet$102.79
- Nikon Prostaff P3 ...L.L.Bean$139.95
- Swarovski EL Binoculars...Bass Pro Shopping$1,999.00$3,299.00
- Bushnell H2O Binoculars, ...Amazon T$55.00
- Bushnell Powerview 2 ...Cabela's$69.99
- Bushnell 132050 Powerview...Kohl's$125.49
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Traditionally binoculars used a double Porro prism design, which resulted in a distinctive offset, zig-zag shape. Roof prism designs allow a simpler exterior, and are now common but they are more expensive to produce.
Porro prism and Perger prism binoculars and roof prism binoculars using the Abbe–Koenig roof prism configuration do not use mirror coatings because these prisms reflect with 100% reflectivity using total internal reflection in the prism rather than requiring a (metallic) mirror coating.
A Perger prism or Perger–Porro prism system is a prism, that is used to invert (rotate by 180°) an image. The special feature of this prism is that, like a traditional double Porro prism system, it manages this with only four beam deflections and has neither a roof edge with the accompanying phase correction problems, a mirrored surface or ...
A Porro–Abbe prism (sometimes called a Abbe–Porro prism ), named for Ignazio Porro and Ernst Abbe, is a type of reflection prism used in some optical instruments to alter the orientation of an image. It is a variant of the more common double Porro prism configuration.
In this way, since the 1990s, roof prism binoculars have also achieved resolution values that were previously only achievable with porro prisms. [6] The presence of a phase-correction coating can be checked on unopened binoculars using two polarization filters.
A Schmidt–Pechan prism is a type of optical prism used to rotate an image by 180°. These prisms are commonly used in binoculars as an image erecting system. The Schmidt–Pechan prism makes use of a roof prism section (from the German: "Dachkante", lit. roof edge ).