Product Description
Kasai Trading 2.3x40mm Starry Sky Binoculars WideBino28
-Brand KASAI
-Color black & silver
-Material rubber, metal
-Focus type Individual focus
-Product weight 255 grams
About this product
"Original" of binoculars for ultra-wide field of view and starry sky viewing / Improved latest version of legendary ultra-long-selling binoculars
28 ° wide field of view where most constellations fit comfortably in one field of view / 1 to 2 grade darker stars can be seen with the naked eye
Special Galilean optical system with 3 groups and 4 lenses / Excellent optical design with less distortion and blurring around the field of view
High transmittance due to full broadband multi-coat / Beautiful star image with high contrast and pinpoint on the entire surface
Can focus to infinity even with strong myopia / Can be used by children with narrow eyes / Ultra-lightweight specification of only 255 g
Detailed information
Brand KASAI
Product model number B-wb28-0
Zoom Magnification (Optical) 2.3
Zoom magnification (including digital) 2.3x
Type Galileo
Attached functions and features Multi-coat
Accessories 2-way carrying case, neck strap
Color black & silver
Effective diameter of lens 40 mm
Real field of view (°) 28
Batteries included No
Packing size 16.7 x 9.1 x 6 cm; 255 g
Effective diameter: 40 mm
Magnification: 2.3 times
Real field of view: 28 °
Maximum dimensions: 123mmx40mmx50mm
Weight: 255g
Focusing mechanism: IF
Applicable eye width: 52mm-73mm
Focusable at infinity Diopter: ＞ -6 Diopter
Standard accessories: neck strap, 2-way carrying case
WideBino28 is a unique opera glass with an amazing wide field of view of 28 °. Most constellations fit in one field of view, and even stars that are 1 to 2 mag darker than the naked eye can be seen clearly, and you can enjoy a unique appearance as if the naked eye was doped. A reprinted and improved version of the legendary product "Wide Vino", which was sold in the 1990s and was praised by many people who love the starry sky as a completely new type of "starry sky observation glass". While maintaining the unique optical design, the optical performance, coating, specifications of each part, etc. have all been updated, and accessories such as the neck strap and 2-way carrying case that are convenient for observation have been further enhanced.
<Optical system> Galilean opera glasses generally have a narrow field of view, and in order to improve this drawback, it is necessary to use an objective lens with an extremely small F value (F2 or less), but with general achromatic lenses The image quality is greatly disturbed by the influence of strong aberration, so it is not very practical. WideBino28 uses a uniquely designed Meniscus objective lens with 2 elements in 2 groups and a cylindrical eyepiece with 2 elements in 1 group to suppress each aberration to an extremely low level and form a good image from the center of the field of view to the periphery. It is an epoch-making ultra-wide-field opera glass that has been successful. Furthermore, in the latest version, the contrast and sharpness are significantly improved compared to the old product by applying broadband multi-coating to the entire surface of the lens to maximize the transmittance and thoroughly treating the inner surface to suppress the occurrence of flare. increase. The color balance in the field of view is also very natural, and there is no field of view coloring found in older products.
<Main body structure & accessories> Most of the parts of the compact and lightweight body with a maximum length of about 12 cm and a weight of 255 g are made of metal. Focusing uses the IF type for the left and right independently. A rubber ring has been added to the eye cup part, which was bare metal in the old product, so that the area around the eyes does not get cold even when used in winter. Front and rear caps are also included to keep the lens surface clean at all times. Furthermore, in the latest version, strap holders are added to both ends of the main body, and a neck strap that is convenient for observation is also included as standard. A 2-way carrying case that allows you to carry a wide vino with a shoulder strap and a belt is also included as standard.
<Comprehensive aptitude> The vast field of view of 28 ° has an overwhelming sense of openness that could never be experienced with conventional opera glasses, and shows the best aptitude for starry sky observation. It is possible to fit one constellation in the field of view, and it is possible to recognize stars that are 1 to 2 mag darker than the limit magnitude with the naked eye. It can be said that it is the only equipment that can do. Especially when you look at the starry area around the Milky Way, the beauty and presence of the image is indescribable, and once you see it, you will be addicted to it. Please experience the unique appearance that has never been seen before, such as "the range you see with the naked eye has come closer as it is".
