Kasai Trading MC Zenith Prism (31.7mm)

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Special 31.7mm zenith prism for high-quality performance High-precision specifications that maintain sharp images even at high magnifications Broadband multi-coated / Reflectivity over 99% φ28mm aperture diameter prevents vignetting even with ultra-wide-angle eyepieces Equipped with M28.5 filter thread / front and rear caps The advantage of zenith prisms is their "total internal reflection," which allows for higher reflectivity and brighter images than standard zenith mirrors. Furthermore, their flatness is easily maintained, ensuring consistent, high accuracy. Furthermore, the prisms do not deteriorate over time, and the reflective surface remains clean, ensuring consistently clear images. The "cylindrical prism effect" shortens the optical path length consumed compared to standard zenith mirrors, making them ideal for use with accessories with long optical paths, such as binoculars. This product is a high-quality MC31.7mm zenith prism, developed exclusively by Kasai to maximize the inherent benefits of zenith prisms. It features a specially designed right-angle prism polished with high precision and treated with a broadband multi-coating for extremely high transmittance across the entire visible light spectrum. From low to maximum magnification, it produces clear, sharp images without image degradation or light loss. The 31.7mm barrel has a fully ribbed interior with a low-reflection black coating to thoroughly combat internal reflections. Of course, the barrel tip is also equipped with an M28.5 filter thread. The aperture diameter is 28mm, so even when using an ultra-wide field of view and long focal length eyepiece, the field of view will not be vignetted. Try out this specially made 31.7mm Zenith Prism for quality performance. Optical path length: 63mm / Weight: 130g / Front and rear caps included / Barrel material: Brass / Sleeve material: Aluminum / Housing material: Hard ABS resin