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Bushnell 10X25 Powerview FRP

RECOMMENDED FOR: Hiking/Travelling; General Purpose.

Body

This full-size binocular weighs 242g.

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-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.

Coating Rating

Coatings help improve light transmission, especially in roof prism designs. This binocular is rated as FULLY COATED, meaning that all surfaces have at least one coating.

Special Coatings

None

Eye Relief

The 10mm eye relief on this binocular provides comfortable eye relief for non-spectacle wearers.

Exit Pupil

This binocular has an exit pupil of 2.5mm, suitable for use in bright and light overcast daylight conditions.

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