Kowa BD42-10x Roof Prism Binocular
Kowa Optimed Inc., is an offspring of the Kowa company ltd. Kowa established during 1980 stands forefront of innovation and has introduced electronics and optics products in line with the taste and preferences of its customers. Its concentration in 3 wide spread market of Asia, Europe and America through sustained and consistent performance have made it achieve a prominence in this industry of optical solutions.

Kowa BD42-10x Realtree Advantage Timber Pattern Binocular has an attractive design of real tree with timber Camo pattern. Most suitable as a belonging for naturalist, bird and wild life observer, water sports and also known for the best terrestrial purposes. It is not suitable for astronomy. The roof prism embedded in this Binocular consists of phase correction coating and a highly reflective aluminium coating which produces sharper and perfect colour images. The prism used is BAK 4 that enhances the brightness and clarity of the images than the normal ones. Apart from this it is known that all the lenses and the prisms are multi coated.
- Kowa BD42-10x Roof Prism Binocular comes in the dimension of 146 mm length, 127 mm width and 51 mm height.
- The weight of this product is 745 grams which makes it handier.
- Has the ability of magnifying 10 times than its original size with an objective lens diameter of 42 mm.
- This full sized binocular makes suitable for watching outdoor activities. This Binocular is fully water proofed as it is filled with dry nitrogen gas. It also suits the extreme weather conditions as it is also fog proofed.
- Structured with the twist up eyecups adds comfort to performance and is perfectly suits anybody be it eye glass wearers or not.
- The focus wheel that is found can be easily tuned and the focus, light is adjusted as required.
- The minimum field of view is 2 metres which is close enough to continue viewing the moving objects like bird watching and sports activities.
- The relative brightness and the eye relief is 17.6 mm. with such an above average eye relief this binocular comforts the eye of spectacle wearers.
- The field of view at 1000 metres is 105 metres. The image is brought as close as 105 metres.
The out of the ordinary C3 coating of Kowa BD42-10x Water Proof Binocular which makes it appealing are
- The prism belongs to Schmidh-Pechan
- High reflective multi coating of dielectrics which is better than the silver coating
- Phase correction coating prevents loss of contrast and resolution.
With these the image produced is just not near to perfect but perfect with brightness, sharpness and accurate colour reproduction. This Kowa waterproof Binocular comes with a warranty for the lifetime.
Kowa BD42-10x Roof Prism, Waterproof Binocular Specification Table
| Manufacturer | Kowa Optimed |
| Model Name | BD42-10x Real tree Advantage Timber Pattern |
| Prism Type | Roof Prism Binocular |
| Magnification | 10x |
| Diameter of Objective Lens | 42mm |
| Dimension (Length x Width) | 146 x 127 mm |
| Eye Relief | 17.6 mm |
| Field of view at 1000 meters | 105 m |
| Optical Coating | Fully multi coated - C3 coating |
| Close focusing distance | 2 m |
| Relative brightness | 17.6 |
| Weight | 745 grams |
| Exit pupil | 4.2 mm |
| Applications | General, nature, wild life and bird watching |
| Warranty | Lifetime |









January 31st, 2009 at 12:32 pm
I am naturalist. This model binocular is very stylish. I like to use it is very compact one. The focus wheel is very good to adjust to reach a bright vision. I am long time user of Binocular but this model is pretty good.