Bushnell 10X42 H2O Roof FullsizeR2,248.00
Bushnell 10X42 H2O Roof Fullsize
RECOMMENDED FOR: Wildlife Observation; General Purpose
This full-size binocular weighs 708.5g.
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. Optical consequences of the design are that roof prisms are more expensive to manufacture than porro binoculars of the same quality and require phase distortion coatings to eliminate the reduced contrast and sharpness caused by phase distortion – a roof prism phenomenon. Roof prisms also produce a more photographically normal depth perception than porro prisms because the lens barrels are in line with the eyepieces.
Glass and Prism Quality
Bak-4 Prisms (barium crown glass) are the highest quality, producing no internal light loss.
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 17mm eye relief on this binocular provides superb viewing comfort for both spectacle and non-spectacle wearers.
This binocular has an exit pupil of 4.2mm, for use in shaded or heavy overcast daylight.
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