Kasai Trading GSO Erecting Japanese Direct Sales 90° Prism, 31.7mm Diameter, 1.25-inch (Official Product)

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Erecting prism equipped with Amichi prism that can obtain an erect image at the same 90° viewing direction as the zenith prism and mirror Since the required optical path length is relatively short, it is also suitable for use with telescopes and binocular devices that do not have sufficient back focus. Front and rear caps included / Optical path length 78mm, aperture diameter φ21mm, weight 100g / Sleeve and barrel material: Aluminum / Housing material: Hard ABS resin This erecting prism features an Amichi prism that produces an erect image at the same 90° viewing angle as a zenith prism and mirror. Because it maintains higher accuracy than the 45° type, it is suitable for use not only on the ground but also for astronomical observations at relatively high magnifications. Because the required optical path length is relatively short, it is ideal for use with telescopes or binoculars that do not have sufficient back focus. The barrel tip is equipped with a filter thread. Amber coated. Optical path length: 78mm. Aperture diameter: φ21mm. Weight: 100g.