--- product_id: 612911232 title: "PATIKIL 5cm Focal Length 30mm Double Convex and 7.5cm Focal Length 30mm Double Concave Lens 1 Set, 2 Pack Glass Optically Polished Round Edges Lens for Physics Experiment Classroom, Clear" price: "63.88 DT" currency: TND in_stock: true url: https://www.desertcart.tn/products/612911232-patikil-5cm-focal-length-30mm-double-convex-and-7-5cm store_origin: TN region: Tunisia --- # 5cm & 7.5cm focal lengths for sharp focus 30mm diameter precision lenses Durable, scratch-resistant optical glass PATIKIL 5cm Focal Length 30mm Double Convex and 7.5cm Focal Length 30mm Double Concave Lens 1 Set, 2 Pack Glass Optically Polished Round Edges Lens for Physics Experiment Classroom, Clear **Price:** 63.88 DT **Availability:** βœ… In Stock ## Summary > πŸ”¬ Elevate your optics game β€” see the unseen, focus on the future! ## Quick Answers - **What is this?** PATIKIL 5cm Focal Length 30mm Double Convex and 7.5cm Focal Length 30mm Double Concave Lens 1 Set, 2 Pack Glass Optically Polished Round Edges Lens for Physics Experiment Classroom, Clear - **How much does it cost?** 63.88 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/612911232-patikil-5cm-focal-length-30mm-double-convex-and-7-5cm) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Perfect Focal Pair:** 5cm convex and 7.5cm concave focal lengths deliver versatile light gathering and dispersing capabilities. - β€’ **Safe & Sleek Design:** Polished round edges ensure comfortable handling without compromising durability or optical quality. - β€’ **Crystal-Clear Optics:** Experience razor-sharp images with premium double convex and concave lenses designed for precision. - β€’ **Consistent Performance:** Accurately measured curvature guarantees reliable, repeatable results every time you use them. - β€’ **Multi-Disciplinary Use:** Ideal for physics experiments, photography, telescopes, and advanced optical instruments. ## Overview This set includes two 30mm diameter glass lensesβ€”a 5cm focal length double convex lens for gathering light and a 7.5cm focal length double concave lens for dispersing light. Crafted from durable, scratch-resistant optical glass with polished edges, these lenses provide precise, consistent curvature ideal for scientific experiments, photography, and optical instruments. ## Description Double concave lenses are used to disperse light. The double convex lens is a type of lens that is thicker at the center than at the edges and is used to gather light. They can make telescopes, suitable for a variety of applications, including scientific experiments, photography, and optical instruments.SpecificationColor: TransparentMaterial: GlassFocal Length (Double Convex Lens) :5cmFocal Length (Double Concave Lens): 7.5cmDiameter(Double Convex Lens):30mm / 1.18"Diameter(Double Concave Lens):30mm / 1.18"Packing List: 2 x Glass LensAdvantageMade of quality glass that is durable, scratch resistant, and provides excellent optical performance. Round edges have been polished, it is not easy to hurt your hand when you assemble it.Designed with a double concave shape that let the light diffuse and produces virtual images. The double convex shape of the lens provides a wider field of view, resulting in clearer and sharper images.The lens is accurately measured and has consistent curvature, ensuring consistent performance and results.InstructionConcave Lens: Place the concave side of the lens facing the object from which you want to disperse the light. Adjust the distance between the object and the lens until the desired level of dispersal is achieved.Convex Lens: Once you have determined the focal length, position the lens in front of the light source. The side of the lens that is curved outward should face the object you want to focus the light on. Move the lens back and forth until the image of the object is in focus on the screen or surface.NOTE: Double concave lenses are often used in combination with other lenses to create specific optical effects. Remember to handle the lens with care to avoid scratches or damage to the surface. ## Features - Color: Color: Transparent; Material: Glass; Focal Length (Double Convex Lens) :5cm; Focal Length (Double Concave Lens): 7.5cm; Diameter(Double Convex Lens):30mm / 1.18"; Diameter(Double Concave Lens):30mm / 1.18"; Packing List: 2 x Glass Lens - Advantage: Made of quality glass that is durable, scratch resistant, and provides excellent optical performance. Round edges have been polished, it is not easy to hurt your hand when you assemble it. Designed with a double concave shape that let the light diffuse and produces virtual images. The double convex shape of the lens provides a wider field of view, resulting in clearer and sharper images. The lens is accurately measured and has consistent curvature. - Concave Lens: Place the concave side of the lens facing the object from which you want to disperse the light. Adjust the distance between the object and the lens until the desired level of dispersal is achieved. Convex Lens:Once you have determined the focal length, position the lens in front of the light source. Move the lens back and forth until the image of the object is in focus on the screen or surface. - Application: Double concave lenses are used to disperse light. The double convex lens is a type of lens that is thicker at the center than at the edges and is used to gather light. They can make telescopes, suitable for a variety of applications, including scientific experiments, photography, and optical instruments. - Note: Double concave lenses are often used in combination with other lenses to create specific optical effects. Remember to handle the lens with care to avoid scratches or damage to the surface. ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 2.8 out of 5 stars 6 Reviews | ## Images ![PATIKIL 5cm Focal Length 30mm Double Convex and 7.5cm Focal Length 30mm Double Concave Lens 1 Set, 2 Pack Glass Optically Polished Round Edges Lens for Physics Experiment Classroom, Clear - Image 1](https://m.media-amazon.com/images/I/51BLWyac2sL.jpg) ![PATIKIL 5cm Focal Length 30mm Double Convex and 7.5cm Focal Length 30mm Double Concave Lens 1 Set, 2 Pack Glass Optically Polished Round Edges Lens for Physics Experiment Classroom, Clear - Image 2](https://m.media-amazon.com/images/I/61TgsSOQkQL.jpg) ![PATIKIL 5cm Focal Length 30mm Double Convex and 7.5cm Focal Length 30mm Double Concave Lens 1 Set, 2 Pack Glass Optically Polished Round Edges Lens for Physics Experiment Classroom, Clear - Image 3](https://m.media-amazon.com/images/I/511jLtjGCJL.jpg) ![PATIKIL 5cm Focal Length 30mm Double Convex and 7.5cm Focal Length 30mm Double Concave Lens 1 Set, 2 Pack Glass Optically Polished Round Edges Lens for Physics Experiment Classroom, Clear - Image 4](https://m.media-amazon.com/images/I/61k4Bi2hKsL.jpg) ![PATIKIL 5cm Focal Length 30mm Double Convex and 7.5cm Focal Length 30mm Double Concave Lens 1 Set, 2 Pack Glass Optically Polished Round Edges Lens for Physics Experiment Classroom, Clear - Image 5](https://m.media-amazon.com/images/I/61xdJxb3qUL.jpg) ## Frequently Bought Together - PATIKIL 5cm Focal Length 30mm Double Convex and 7.5cm Focal Length 30mm Double Concave Lens 1 Set, 2 Pack Glass Optically Polished Round Edges Lens for Physics Experiment Classroom, Clear - Amlong Crystal Premium Optical Glass Double Convex and Concave Lens Set, 50mm Diameter, 3 Double Convex (20, 30, 50cm FL) and 3 Double Concave (20, 30, 50cm FL), 6 Piece Set - EISCO 6pc Optical Lens Set, 2" (50mm) Diameter - 3 Double Convex Lens & 3 Double Concave Lens - 200mm, 300mm, 500mm Focal Lengths - Optically True Glass - Ground, Beveled Edges --- ## 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.tn/products/612911232-patikil-5cm-focal-length-30mm-double-convex-and-7-5cm](https://www.desertcart.tn/products/612911232-patikil-5cm-focal-length-30mm-double-convex-and-7-5cm) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-22*