Bushnell 8X42 POWERVIEW 2008, ROOF PRISM, MC
Roof prism designs have straight barrels with the front objective in-line with the eye piece. This design architecture makes it possible to produce more compact binoculars than porro or inverted porro designs.
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Glass and Prism Quality
Bak-7 Prisms (borosilcate crown glass) are lower in quality than Bak-4 and as an isolated factor light transmission is reduced by 10-15%, resulting in a lower brightness image than that produced by Bak-4 prisms.
Coatings help improve light transmission, especially in roof prism designs. This binocular is rated as MULTI-COATED, meaning that at least one surface has more than one coating on it.
The 17.6mm eye relief on this binocular provides superb viewing comfort for both spectacle and non-spectacle wearers.
This binocular has an exit pupil of 5.25mm, for use in dim twilight and dawn light, ideal for hunting, wildlife observation and birding.