---
product_id: 45261360
title: "20mm CO2 Laser Lens, 50.8mm Focal Length, PVD ZnSe Material, 30W-100W Compatible, For CO2 Laser Engraving & Cutting"
brand: "cncoletech"
price: "6674 kr"
currency: ISK
in_stock: true
reviews_count: 13
category: "Cncoletech"
url: https://www.desertcart.is/products/45261360-20mm-co2-laser-lens-50-8mm-focal-length-pvd-znse
store_origin: IS
region: Iceland
---

# 50.8mm focal length for sharp focus ≥99.5% transmittance with PVD ZnSe coating 20mm precision diameter 20mm CO2 Laser Lens, 50.8mm Focal Length, PVD ZnSe Material, 30W-100W Compatible, For CO2 Laser Engraving & Cutting

**Brand:** cncoletech
**Price:** 6674 kr
**Availability:** ✅ In Stock

## Summary

> ⚡ Elevate your laser game with precision that cuts through the noise!

## Quick Answers

- **What is this?** 20mm CO2 Laser Lens, 50.8mm Focal Length, PVD ZnSe Material, 30W-100W Compatible, For CO2 Laser Engraving & Cutting by cncoletech
- **How much does it cost?** 6674 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/45261360-20mm-co2-laser-lens-50-8mm-focal-length-pvd-znse)

## Best For

- cncoletech enthusiasts

## Why This Product

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

## Key Features

- • **Optimized Focal Length:** 50.8mm focal length ensures perfect beam convergence for superior cutting and engraving efficiency.
- • **Wide Power Compatibility:** Seamlessly supports 30W to 100W CO2 lasers, making it versatile for various professional setups.
- • **Pinpoint Precision Optics:** 20mm diameter lens engineered for ultra-accurate laser focus, maximizing engraving detail.
- • **Premium PVD ZnSe Material:** Durable, high-transmittance coating reduces laser loss and withstands high temperatures for long-lasting performance.
- • **Enhanced Durability & Efficiency:** Double-sided solid coating resists wiping and wear, maintaining optical clarity and boosting machine uptime.

## Overview

The CNCOLETECH 20mm CO2 Laser Lens features a 50.8mm focal length and high-quality PVD ZnSe material with ≥99.5% transmittance, compatible with 30W-100W CO2 lasers. Engineered for precision and durability, it offers reduced laser loss and high temperature resistance, making it ideal for professional-grade laser engraving and cutting applications.

## Description

Buy CNCOLETECH 20mm CO2 Laser Lens, 50.8mm Focal Length, PVD ZnSe Material, 30W-100W Compatible, For CO2 Laser Engraving & Cutting: Optics - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Great lens - I've been buying inexpensive lenses for my CO2 laser on desertcart for a couple of years now and have never had a problem with them. I've tried lenses that cost twice as much and saw absolutely no difference in performance. I consider lenses to be a consumable and thus the less expensive the better and these work well.
Review: Everything as advertised, works better than original. - Why did you pick this product vs others?: The item met the specifications I needed.

## Features

- Material: High quality PVD ZnSe material. Compatible power: 30W-100W
- Diameter: 20mm/0.79"; Focal Length:50.8mm/2"; Thickness:2.0-2.2mm/0.08"; Transmittance: ≥99.5%
- Exquisite Technology: Superb Double-sided solid coating, precision slicing, polishing and grinding process, Reduced laser loss, wiping resistant, high temperature resistance, excellent optical properties, high working efficiency.
- High efficiency: PVD ZnSe CO2 laser focus lens has Focusing Spot Size more Smaller, the energy is more concentrated, making the CO2 laser engraving, cutting machine more efficient.
- Application: CO2 laser lens are mainly used in CO2 laser engraving and cutting well.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01FEOP5TW |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #37,848 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #93 in Jewelry Making Engraving Machines & Tools |
| Brand | CNCOLETECH |
| Color | 20mm |
| Customer Reviews | 4.6 4.6 out of 5 stars (437) |
| Date First Available | May 9, 2016 |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 0.634 ounces |
| Item model number | 905211 |
| Manufacturer | Shanghai Top Nine Industrial Co.,Ltd |
| Material | ZnSe |
| Operation Mode | Automatic |
| Package Dimensions | 2.83 x 2.4 x 0.91 inches |
| Part Number | LENS-20-508 |
| Shape | Round |
| Size | Dia:20mm FL:50.8mm/2" |
| Style | PVD ZnSe |

## Product Details

- **Brand:** CNCOLETECH
- **Color:** 20mm
- **Item Weight:** 0.02 Kilograms
- **Material:** ZnSe
- **Style:** PVD ZnSe

## Images

![20mm CO2 Laser Lens, 50.8mm Focal Length, PVD ZnSe Material, 30W-100W Compatible, For CO2 Laser Engraving & Cutting - Image 1](https://m.media-amazon.com/images/I/51Zw9NEIwOL.jpg)

## Questions & Answers

**Q: The focus of this lens is 101.6mm**
A: My set up is 2" (50.8 mm).  if you're having trouble, the lens may be installed upside down. Theory says: Convex side towards the beam (up). Western laser machines - and Korean -always has Convex up. Chinese used to set Convex down.

**Q: What is the purpose?**
A: It's good for 40W-150W CO2 laser tube / laser enngraving and cutting machine.

**Q: What is the purpose?**
A: To Control The focal distance between the laser and the material surface.

**Q: it says 20 pieces for this.... do you get 20 lenses?**
A: por el precio parece que solo uno

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great lens
*by S***M on September 7, 2025*

I've been buying inexpensive lenses for my CO2 laser on Amazon for a couple of years now and have never had a problem with them. I've tried lenses that cost twice as much and saw absolutely no difference in performance. I consider lenses to be a consumable and thus the less expensive the better and these work well.

### ⭐⭐⭐⭐⭐ Everything as advertised, works better than original.
*by D***I on June 21, 2025*

Why did you pick this product vs others?: The item met the specifications I needed.

### ⭐⭐⭐⭐⭐ Instant power up!
*by S***I on February 17, 2020*

I bought the air assist that allows use of 18mm lens, so I gave this lens a shot, the price is decent and the spec. Looked not much different than the more expensive brands. Got it today with also the mirrors from The same sellers. So I installed it in my K40 laser engraver replacing the stock laser head with the new LO head with air assist with the new lens and mirror. InScrewed up the alignment at first, but after making some adjustment and set power to 10% and test it on a cardboard. BAM! It cut thru the cardboard in one pass while before it only leaves a line! Who knows, maybe the alignment was off before, but I definitely think the lens made a difference, for the quality of the coating on both the lens and mirror are better than the stock. It is a worthy upgrade, now marking on stainless turns out great, really helps serve the purpose of getting the K40 in the first place.

## Frequently Bought Together

- CNCOLETECH 20mm CO2 Laser Lens, 50.8mm Focal Length, PVD ZnSe Material, 30W-100W Compatible, For CO2 Laser Engraving & Cutting
- Cloudray Mo Mirror Dia 25mm (0.98 Inch) Thk 3mm (0.12 Inch) for CO2 laser engraving cutting machine Pack of 3PCS
- Cloudray CO2 Laser Lens 20mm Laser Mirror CO2 Laser Focal Lens CO2 Focus Lens,CVD ZnSe for CO2 Laser Engraving Cutting Machine,Laser Cutter 40W-200W,Dia 20mm FL50.8mm

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**Shop now:** [https://www.desertcart.is/products/45261360-20mm-co2-laser-lens-50-8mm-focal-length-pvd-znse](https://www.desertcart.is/products/45261360-20mm-co2-laser-lens-50-8mm-focal-length-pvd-znse)

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-04*