--- product_id: 268754893 title: "Eisco Labs Optical Glass Lens, Double Concave, 75mm Diameter, 20cm Focal Length" brand: "eisco" price: "24.59 OMR" currency: OMR in_stock: true reviews_count: 5 category: "Eisco" url: https://www.desertcart.com.om/products/268754893-eisco-labs-optical-glass-lens-double-concave-75mm-diameter-20cm store_origin: OM region: Oman --- # 200mm focal length accuracy Optically polished glass 75mm precision diameter Eisco Labs Optical Glass Lens, Double Concave, 75mm Diameter, 20cm Focal Length **Brand:** eisco **Price:** 24.59 OMR **Availability:** βœ… In Stock ## Summary > πŸ”¬ Elevate your optics game with precision and polish! ## Quick Answers - **What is this?** Eisco Labs Optical Glass Lens, Double Concave, 75mm Diameter, 20cm Focal Length by eisco - **How much does it cost?** 24.59 OMR with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/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 - β€’ **Sleek Double Concave Design:** Enhances light divergence with smooth, beveled edges for professional-grade results. - β€’ **200mm Diverging Focal Length:** Ideal for advanced light refraction and physics classroom applications. - β€’ **Versatile for Science & Spin:** Not just for opticsβ€”its smooth surface doubles as a top spinning tool, blending education with fun. - β€’ **Premium Optically Worked Glass:** Crafted from high-grade, polished glass ensuring crystal-clear clarity and durability. - β€’ **Precision Engineered 75mm Diameter:** Perfectly sized for detailed optical experiments and demonstrations. ## Overview The Eisco Labs Optical Glass Lens is a 75mm diameter, double concave lens with a 200mm focal length, crafted from high-quality optically polished glass. Designed for rigorous physics demonstrations and light refraction experiments, it combines durability with precision, making it a must-have for science classrooms and enthusiasts seeking professional-grade optical tools. ## 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. - The glass was cracked when it arrived. Review: Perfectly shaped lens - Product was exactly as described and made very well ## 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 | | Brand | Eisco | | Brand Name | Eisco | | Customer Reviews | 4.5 out of 5 stars 305 Reviews | | Global Trade Identification Number | 00849230033965 | | Item Weight | 0.01 Kilograms | | Item weight | 0.01 Kilograms | | Manufacturer | Eisco | | Material | Glass | | Material Type | Glass | | Model Number | FSC1029 | | Number of Items | 1 | | Part Number | FSC1029 | | UPC | 849230033965 | ## Product Details - **Brand:** Eisco - **Item weight:** 0.01 Kilograms - **Material:** Glass - **Number of Items:** 1 - **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 ### ⭐ The glass was cracked. *by K***R on 26 June 2024* The glass was cracked when it arrived. ### ⭐⭐⭐⭐⭐ Perfectly shaped lens *by T***. on 29 July 2026* Product was exactly as described and made very well ### ⭐⭐⭐⭐⭐ Like most other reviewers *by S***R on 18 February 2016* Like most other reviewers, I bought this lens for spinning tops. I have a large precision top collection from several manufacturers in the USA and abroad. My favorites companies that sell spin tops include JL Lawson, Lance Barnett, and Focus Works. I also have the Prometheus top, which another reviewer mentioned. I just spun the Prometheus top two times on this lens and it got spin times of 8 mins or more both times. I can definitely suggest using this lens for spinning tops. It works as good as or better than the mirrors (which i also have) and it looks way better and more interesting on display in an office or on a shelf. ## 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? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.om/products/268754893-eisco-labs-optical-glass-lens-double-concave-75mm-diameter-20cm](https://www.desertcart.com.om/products/268754893-eisco-labs-optical-glass-lens-double-concave-75mm-diameter-20cm) --- *Product available on Desertcart Oman* *Store origin: OM* *Last updated: 2026-10-13*