--- product_id: 268754893 title: "Eisco Labs Optical Glass Lens, Double Concave, 75mm Diameter, 20cm Focal Length" brand: "eisco" price: "13413 som" currency: KGS in_stock: true reviews_count: 5 category: "Eisco" url: https://www.desertcart.kg/products/268754893-eisco-labs-optical-glass-lens-double-concave-75mm-diameter-20cm store_origin: KG region: Kyrgyzstan --- # 200mm focal length for exact divergence Optically polished, beveled edges 75mm precision diameter Eisco Labs Optical Glass Lens, Double Concave, 75mm Diameter, 20cm Focal Length **Brand:** eisco **Price:** 13413 som **Availability:** ✅ In Stock ## Summary > 🔬 Elevate your optics game — see science in a new light! ## Quick Answers - **What is this?** Eisco Labs Optical Glass Lens, Double Concave, 75mm Diameter, 20cm Focal Length by eisco - **How much does it cost?** 13413 som with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/268754893-eisco-labs-optical-glass-lens-double-concave-75mm-diameter-20cm) ## Best For - eisco enthusiasts ## Why This Product - Trusted eisco brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Manufactured under strict quality controls with durable, high-grade materials. - • **Classroom & Beyond:** Ideal for physics demos and top spinning enthusiasts craving precision and style. - • **Crystal-Clear Optics:** Experience flawless light refraction with premium optically worked glass. - • **Diverging Powerhouse:** 200mm focal length designed to perfectly demonstrate double concave lens properties. - • **Precision Engineering:** 75mm diameter and 12mm thickness crafted for consistent, reliable results. ## Overview The Eisco Labs Double Concave Optical Glass Lens features a 75mm diameter and a 200mm focal length, crafted from high-quality, optically polished glass with beveled edges. Designed for precision in physics demonstrations and top spinning, it combines durability with scientific accuracy, making it a must-have for educational and professional lab environments. ## Description Optically True, Double Concave Lens75mm Diameter, 200mm Focal LengthHigh quality, optically true lens. Made of highly polished, quality glass. Spherical with ground, beveled edges. Designed for educational purpose and science classroom demonstrations in optics and light physics but features an ideal surface for top spinning. Lens measures 3" (75mm) in diameter, and has a diverging focal length of 200mm.Eisco Labs proudly manufactures its own products using state-of-the-art equipment, and following the highest standards of quality control.Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind. They are manufactured with only the highest grade, raw materials and according to international quality standards to ensure that they can withstand use in even the toughest laboratory environments. Review: The glass was cracked when it arrived. Review: I got my nephew a professionally spun and tuned spinning top for Christmas. These lenses were recommended for use as a base on which to spin the top as the gentle concave shape keeps the top towards the center and the glass surface provides a smooth surface with little friction. Using this as a base he was able to spin his top several times that night for 4 to 5 minutes and it spun so perfectly it would often hardly look like it was even spinning. ## Features - DOUBLE CONCAVE || Highly polished, double concave lens - SPHERICAL || Lens measures 3" (75mm) in diameter and approximately 12mm thick - 200MM FOCAL LENGTH || Diverging lens with a 200mm focal length - OPTICALLY WORKED GLASS || Made of high quality, optically worked glass. Highly polished with beveled, ground edges - GREAT FOR PHYSICS CLASSROOMS or TOP SPINNING || This optically true lens is excellent for physics classroom demonstrations in optics and light refraction. It's smooth, concave surface also makes this lens ideal for top spinning ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00CLC7V5C | | ASIN | B00CLC7V5C | | Brand Name | Eisco | | Customer Reviews | 4.4 4.4 out of 5 stars (304) | | Customer reviews | 4.4 4.4 out of 5 stars (304) | | Date First Available | 27 August 2014 | | Global Trade Identification Number | 00849230033965 | | Is Discontinued By Manufacturer | No | | Item Weight | 0.01 Kilograms | | Item model number | FSC1029 | | Manufacturer | Eisco | | Manufacturer | Eisco | | Material Type | Glass | | Product Dimensions | 7.62 x 10.16 x 1.27 cm; 10 g | | UPC | 849230033965 | ## Product Details - **Brand:** Eisco - **Item weight:** 0.01 Kilograms - **Manufacturer:** Eisco - **Material:** Glass - **UPC:** 849230033965 ## Images ![Eisco Labs Optical Glass Lens, Double Concave, 75mm Diameter, 20cm Focal Length - Image 1](https://m.media-amazon.com/images/I/81XT8AFCh6L.jpg) ![Eisco Labs Optical Glass Lens, Double Concave, 75mm Diameter, 20cm Focal Length - Image 2](https://m.media-amazon.com/images/I/71GYLsjsZUL.jpg) ![Eisco Labs Optical Glass Lens, Double Concave, 75mm Diameter, 20cm Focal Length - Image 3](https://m.media-amazon.com/images/I/81w7zqM1hBL.jpg) ## Customer Reviews ### ⭐ Review *by K***R on 26 June 2024* The glass was cracked when it arrived. ### ⭐⭐⭐⭐⭐ Review *by K***N on 15 January 2023* I got my nephew a professionally spun and tuned spinning top for Christmas. These lenses were recommended for use as a base on which to spin the top as the gentle concave shape keeps the top towards the center and the glass surface provides a smooth surface with little friction. Using this as a base he was able to spin his top several times that night for 4 to 5 minutes and it spun so perfectly it would often hardly look like it was even spinning. ### ⭐⭐⭐⭐⭐ Review *by A***S on 1 December 2025* Bought this Eisco Optical Glass Lens to help me with my art projects and I am delighted by the quality of the lens. Wondering if there is a holder available for it. Bought two more for friends in my class. ## Frequently Bought Together - EISCO Optical Glass Lens, 3" (75mm) - 200mm Focal Length - Ground, Beveled Edges - Use as Top Spinning Base - ForeverSpin Stainless Steel(Brush-Finish) Spinning Top - World Famous Spinning Tops --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.kg/products/268754893-eisco-labs-optical-glass-lens-double-concave-75mm-diameter-20cm](https://www.desertcart.kg/products/268754893-eisco-labs-optical-glass-lens-double-concave-75mm-diameter-20cm) --- *Product available on Desertcart Kyrgyzstan* *Store origin: KG* *Last updated: 2026-05-31*