Kasai Trading MC Zenith Prism (31.7mm)

Platform-Certified Top Store Operated by Japanese Experts

🎴 Why Choose Us? ・Condition: NEW — We handle 100% brand-new and unused items only. Never used, never refurbished. ・Daily New Arrivals: Popular and brand-new items from the Japanese market, added every single day. ・Professional Direct Shipping from Japan: We work with export logistics specialists. Your order is packed with reinforced packaging and delivered safely. ・Premium Quality Guaranteed: We only handle products that meet Japan's strict quality standards. ・Japanese Manuals: The included instruction manual is generally in Japanese only. We recommend a smartphone camera translation app.

📞 PLEASE READ: HOW TO RECEIVE YOUR PARCEL SAFELY Your parcel is sent from Japan. Customs or the delivery company in your country may need to contact YOU directly. If they cannot reach you, the parcel is returned to Japan. This is the most common reason an order is not delivered. Please help us with these 6 points: ・① Correct phone number: Please register a phone number that you use every day, with your country code. A wrong or old number is the number one cause of a returned parcel. ・② Answer unknown calls: Customs and couriers call from local numbers you do not know. Please answer these calls during the delivery period. ・③ Check all messages: Please check SMS, email (including the spam folder), messenger apps, your Joom notifications, and any paper notice in your mailbox. ・④ Answer customs quickly: Customs may ask for your ID, passport or tax number, or a document. For some high-value orders, or for parcels delivered by a courier company, a payment may also be requested. Please reply within the time limit they give you. Many countries hold a parcel only for a few days. ・⑤ Collect it in time: If the parcel waits at a post office or pick-up point, please collect it before the storage period ends. ・⑥ Use your official name: Please write your full name and address exactly as they appear on your official ID. In some countries, customs cannot clear a parcel if the name does not match. ・If your address or phone number changes after you order, please inform Joom Customer Support immediately. Only Joom can update your order information.

🇯🇵 ABOUT JAPANESE PRODUCTS ・The instruction manual, package, labels and product display are generally in Japanese only. In many products the language cannot be changed. ・Electrical products are made for Japan (100V, Type A plug). If the label says "AC 100V" only, a step-down transformer is required in most countries. A plug adapter alone changes only the shape, not the voltage, and can destroy the product. If the label says "AC 100-240V", only a plug adapter is needed. ・Media and electronics may follow Japanese regions and standards (DVD Region 2 / Blu-ray Region A, Japanese TV and radio bands, Japan-only apps and services). ・Sizes follow Japanese standards. Japanese sizes are often smaller than EU or US sizes. Please check the measurements in centimeters, not the size letter. ・For food, cosmetics and similar goods: ingredients and the expiry date are printed in Japanese. Please check your country's import rules before ordering, as some items cannot be imported.

📷 CONDITION AND PHOTOS ・Condition: NEW. Every item is brand-new and unused. ・Photos are for reference. Real color can look slightly different depending on your screen. ・Brand-new items may have very small marks on the outer box from storage or transport. The product itself is checked before shipping.

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🗾Product description 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