Kasai Trading 10cm large binoculars for astronomical objects 20x100W 20x100mm/3.3° wide-angle MS-BINO

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10cm large-diameter binoculars for astronomical observation / 20x, wide-angle specification with a real field of view of 3.3 degrees Exit pupil diameter 5mm, ideal for observing nebulae and star clusters / Eye relief 20mm, comfortable even when wearing glasses High-quality, high-performance optical system with full multi-coating / Adopts BaK4 prism The lightest 10cm binoculars at 3.2kg due to the use of a magnesium alloy body. The main body is fully waterproof with a rubber coating / comes with a tripod mount Effective diameter: 100mm Magnification: 20x Actual field of view: 3.3° Exit pupil diameter: 5mm Eye relief: 20mm Compatible eye width: 55mm-72mm Maximum dimensions: 380mmx245mmx116mm Weight: 3200g Focusing mechanism: IFMS-BINO The 20x100W is a simple and sturdy 10cm FMC binocular that combines rich image quality with a large aperture and robustness that will not budge even when used for rigorous outdoor observation. With an exit pupil diameter of 5mm, which is ideal for stargazing, and a wide-field eyepiece with an apparent field of view of 66 degrees, it is extremely powerful for DEEP-SKY observation. The lightest 10cm binoculars at 3.2kg. You can easily take it anywhere and enjoy dynamic nebula and star cluster observation with a large 10cm aperture. ＜Optical system & body structure＞ High quality binoculars designed and manufactured in accordance with US military standards. Equipped with an objective lens with a large F value to ensure sharpness. The lens design uses a two-element separation type to ensure a good image due to the large aperture. The large eyepiece with an eye lens diameter of φ25mm uses a unique field flattening design that corrects distortion and field curvature. By adopting a large BaK4 prism, it is possible to see even the periphery of the field of view. Ensures clear image quality without dimming. Multi-layer broadband multi-coating is applied to the entire optical system of the objective lens, eyepiece, and prism, guaranteeing a high total system transmittance of over 92%. Of course, it is completely sealed and waterproof. The rubber eyecup can be folded back, and combined with the long 20mm eye relief, even glasses wearers can see the entire field of view. The exterior uses a thick rubber coat that provides good grip and is resistant to impact. The body is made of solid and lightweight magnesium alloy. The 3.2kg body is approximately 30% lighter than conventional products, making it the lightest 10cm large binoculars. A photo tripod mounting bracket, which is essential for astronomical observation, is also included as standard. ＜Overall suitability＞ "Exit pupil diameter 5mm" is the ideal pupil diameter for DEEP-SKY observation. These are large 10cm binoculars, and until now there have been very few products with this pupil diameter. Moreover, this camera has a wide-angle specification with an actual field of view of 3.3°. It is possible to fit large objects such as M31 into one field of view. Enjoy a rich stargazing tour to your heart's content with 10cm large aperture binoculars optimized for observing nebulae and star clusters!