Kowa 8x42 BD42 Binoculars
Item#: KOWA092- Roof prism mid-size 8x42 binoculars
- 42mm objective lens diameter
- 8x magnification and multi-coated optics
- Waterproof & nitrogen filled to prevent fogging
- Easy-to-use twist-up eyecups & inner focusing mechanism
Product Highlights
Features
Phase Coating on the Roof Prism
The prism has phase correction coating and a highly reflective aluminum coating to ensure sharp images and accurate color reproduction. Through the use of a Bak4 prism Kowa is able to give you bright, clear images all the way to the edge of the objective lens.
Fully Multi-Coated Optics
All lenses and prisms are manufactured with multilayered coating, ensuring a bright and clear visual range.
Waterproof and Nitrogen Purged
The housing is waterproof and filled with dry nitrogen gas to prevent the lens from fogging. The binoculars can be used in the rain and other harsh weather conditions. (Not intended for underwater use)
Minimum Focusing Distance of 6 feet
With a minimum focusing distance of only 6 feet, this binocular can be used for many purposes.
Easy to Use Twist-Up Eyecup
All of the BD Series binoculars have twist-up eyecups suitable for both eyeglass wearers and non-eyeglass wearers.
Inner Focusing Mechanism
Easy focusing and a smooth turning focus wheel. Through the use of an inner focusing mechanism, the light, compact design of the BD Series binoculars was made possible.
C3 Coating
Kowa's roof prism binoculars use the schmidt-Pechan prism. One surface of the Pechan prism does not provide total reflection, so we have applied a highly reflective multi-coating of dielectrics (C3 Coating). This allows for a much higher reflectivity than with coatings of silver or optically-enhanced aluminum, offering a reflectance of 99% or higher across the entire visible spectrum (400 to 700mm). Not only does this provide bright and sharp images, but accurate color reproduction is also achieved. Furthermore, the roof surface of the Schmidt prism is phase coated (phase correction coated) to prevent the loss of contrast and image resolution.
Additional Specifications
Magnification 8X, Effective Diameter of Objective Lens 42mm, Minimum Focusing Distance 2.0m, Real Field of View 6.3 Degrees, Apparent Field of View 50.4 Degrees, Exit Pupil Diameter 5.20mm, Relative Brightness 27.6, Twilight Factor 18.3, Eye-Relief 18.3mm
Size
Full Size Binoculars , Mid Size Binoculars
Eye Relief
14.2mm , 15mm , 18.3mm
Waterproof
Yes
Features
Waterproof
Magnification
10x , 8x
Brand
Kowa
Objective Lens Diameter
32mm , 42mm
Field of View @ 1000 Yards
330 ft. , 360 ft. , 429 ft. , NA
Exit Pupil
3.2mm , 4.2mm , 4mm , 5.2mm
Focus Type
Center
Close Focusing Distance
4.9 ft. , 7 ft.
Binoculars Series
BD42 Series Full Size Binoculars , Kowa BD42 High Performance Binoculars
Prism Type
Roof Prism Binoculars
Weight (oz)
26.2 oz.
