---
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"
brand: "patikil"
price: "113 Lei"
currency: RON
in_stock: true
reviews_count: 1
url: https://www.desertcart.ro/products/612911232-patikil-5cm-focal-length-30mm-double-convex-and-7-5cm
store_origin: RO
region: Romania
---

# Optically polished glass edges 5cm double convex focal length 7.5cm double concave focal length 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

**Brand:** patikil
**Price:** 113 Lei
**Availability:** ✅ In Stock

## Summary

> 🔬 Elevate your optics game—see science in a whole new light!

## 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 by patikil
- **How much does it cost?** 113 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/612911232-patikil-5cm-focal-length-30mm-double-convex-and-7-5cm)

## Best For

- patikil enthusiasts

## Why This Product

- Trusted patikil brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Safe, Polished Round Edges:** Smooth edges ensure safe handling during experiments—no more worrying about cuts or chips.
- • **Compact & Portable 2-Pack Set:** Two 30mm lenses in one set, ideal for on-the-go learning or collaborative projects.
- • **Durable, Scratch-Resistant Glass:** Crafted from premium glass that withstands classroom use and maintains optical clarity.
- • **Precision Optics for Sharp Imaging:** Experience crystal-clear visuals with accurately measured 5cm convex and 7.5cm concave focal lengths.
- • **Versatile for STEM & Creative Projects:** Perfect for physics experiments, photography, and custom optical instruments—unlock your scientific creativity.

## Overview

This set includes two 30mm diameter glass lenses: a 5cm focal length double convex lens for focusing light and a 7.5cm focal length double concave lens for dispersing light. Both lenses feature optically polished round edges for safety and durability, making them ideal for physics experiments, photography, and optical instrument applications.

## 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 | 3.8 out of 5 stars 4 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)

## Customer Reviews

### ⭐ The biconcave lens has a circular line along the perimeters, ruining the optics
*by A***S on May 30, 2024*

The media could not be loaded. It's not seamless. There is a circular line that runs along the outer line line of it, and it's plainly visible, ruining the optics. I'm not sure if I got a defective one, or if this is how it really is supposed to be, but it was not displayed as such the photos

## Frequently Bought Together

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-15*