---
product_id: 433746642
title: "CVD II-VI ZnSe Focus Lens Dia:20mm FL:63.5mm/2.5\" for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W"
brand: "cncoletech"
price: "298.33 DT"
currency: TND
in_stock: true
reviews_count: 5
category: "Cncoletech"
url: https://www.desertcart.tn/products/433746642-cvd-ii-vi-znse-focus-lens-dia-20mm-fl-63
store_origin: TN
region: Tunisia
---

# 20mm diameter, 63.5mm focal length Supports 40W-200W laser power ≥99.8% transmittance CVD II-VI ZnSe Focus Lens Dia:20mm FL:63.5mm/2.5" for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W

**Brand:** cncoletech
**Price:** 298.33 DT
**Availability:** ✅ In Stock

## Summary

> 🎯 Sharpen your laser’s focus, cut through limits!

## Quick Answers

- **What is this?** CVD II-VI ZnSe Focus Lens Dia:20mm FL:63.5mm/2.5" for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W by cncoletech
- **How much does it cost?** 298.33 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/433746642-cvd-ii-vi-znse-focus-lens-dia-20mm-fl-63)

## 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

- • **Effortless Maintenance:** Smooth polished surface reduces laser loss and cleans easily, keeping your workflow uninterrupted.
- • **Universal Compatibility:** Optimized for CO2 lasers from 40W up to 200W, perfect for professional-grade engraving and cutting.
- • **Maximized Laser Efficiency:** Smaller focused spot size concentrates energy for faster, cleaner cuts and engravings.
- • **Precision Engineered Optics:** High-class CVD II-VI ZnSe material ensures ultra-stable laser performance and longevity.
- • **Durability Meets Performance:** Double-sided solid coating resists wiping and high temperatures, extending lens life.

## Overview

The CNCOLETECH CVD II-VI ZnSe Focus Lens (20mm diameter, 63.5mm focal length) is crafted from premium US II-VI ZnSe material, delivering ≥99.8% transmittance and exceptional durability with double-sided solid coating. Designed for CO2 laser systems between 40W and 200W, it offers a smaller spot size for enhanced cutting and engraving precision, making it the go-to upgrade for professionals seeking efficiency and reliability in their laser workflows.

## Description

CNCOLETECH CVD II-VI Znse Focus Lens 1PCS Dia:20mm FL:63.5mm/2.5" Thickness:2.2mm For CO2 Laser Engraving Cutting Engraver/Cutter 40W 50W 60W 80W 100W 130W 150W 180W 200W Feature: 1.High class CVD/II-VI Znse material from USA II-VI; 2.Double-sided solid Coating;Resistance to wipe;High transmittance; Long service life Parameter: Please check the listing pic. Application: Please check the lsting pic Packing list: CVD/II-VI Znse focus lens x 1pcs

Review: Performance - Fantastic lens- works great
Review: 150W+ Just fine - I use this in my 20mm 2.5" head for my machine and it does just fine cutting at 150w. It actually had a smaller spot size than the factory original. cleans easily (if done regularly) However, the focus point may not actually be exactly 2.5". I kept checking line width with an engraving test till I got the height just right and I use that as my set point for engraving and about 1mm lower (1/32" for you imperials out there) for cutting thicker materials. I regularly slice 6mm ply and MDF with no issues at about 125w.

## Features

- Material: High class CVD ZnSe material (US II-VI). High-quality materials ensure more stable laser system; excellent High-Power density endurance. Compatible power: 40W-200W.
- Diameter: 20mm/0.79"; Focal Length:63.5mm/2.5"; Thickness:2.0-2.2mm/0.08"; Transmittance: ≥99.8%.
- Exquisite Process: Superb Double-sided solid coating, increase service life, precision slicing, polishing and grinding process, Reduced laser loss, wiping resistant, high temperature resistance, excellent optical properties, high working efficiency.
- High efficiency: CVD ZnSe Laser Focus Lens has smaller focusing spot size, the energy is more concentrated, making the CO2 laser engraving, cutting machine more efficient.
- Usage: CO2 replacement laser lens are mainly used in CO2 laser engraving and cutting well.
- Lens Shape: Plano-convex( some meniscus shape may mixed together when manufacturing, but it is the same effect as Plano-convex shape).

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01DP2HGYM |
| Best Sellers Rank | #205,580 in Home Improvement ( See Top 100 in Home Improvement ) #4,037 in Power Tools |
| Brand | CNCOLETECH |
| Brand Name | CNCOLETECH |
| Colour | Fl:2.5"/63.5mm |
| Customer Reviews | 4.7 out of 5 stars 66 Reviews |
| Item Weight | 0.03 Kilograms |
| Manufacturer | Shanghai Top Nine Industiral Co.,Ltd |
| Manufacturer Part Number | IIVI-20-635 |
| Material | ZnSe |
| Material Type | ZnSe |
| Model Number | IIVI-20-635 |
| Operation Mode | Manual |
| Style | Laser |
| Style Name | Laser |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** CNCOLETECH
- **Material:** ZnSe
- **Colour:** Fl:2.5"/63.5mm
- **Style:** Laser
- **Item Weight:** 0.03 Kilograms

## Images

![CVD II-VI ZnSe Focus Lens Dia:20mm FL:63.5mm/2.5" for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W - Image 1](https://m.media-amazon.com/images/I/51ZDozGaycL.jpg)
![CVD II-VI ZnSe Focus Lens Dia:20mm FL:63.5mm/2.5" for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W - Image 2](https://m.media-amazon.com/images/I/71zmtC6H3DL.jpg)
![CVD II-VI ZnSe Focus Lens Dia:20mm FL:63.5mm/2.5" for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W - Image 3](https://m.media-amazon.com/images/I/71hIYYZf1nL.jpg)
![CVD II-VI ZnSe Focus Lens Dia:20mm FL:63.5mm/2.5" for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W - Image 4](https://m.media-amazon.com/images/I/5148Vk-CBiL.jpg)
![CVD II-VI ZnSe Focus Lens Dia:20mm FL:63.5mm/2.5" for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W - Image 5](https://m.media-amazon.com/images/I/91mzRtZKdML.jpg)

## Questions & Answers

**Q: How can i order other FL?**
A: Thank for your interest in our lens. Here is other FL lens link in USA FBA warehouse, you will get it soon.
FL 25.4mm lens link: https://www.amazon.com/dp/B01DP2HDBI?ref=myi_title_dp
FL 38.1mm lens link: https://www.amazon.com/dp/B01DP2HECQ?ref=myi_title_dp
FL 50.8mm lens link:https://www.amazon.com/dp/B01DP2HFU2?ref=myi_title_dp
FL 76.2mm lens link:https://www.amazon.com/dp/B01DP2GTMW?ref=myi_title_dp
FL 101.6mm lens link:https://www.amazon.com/dp/B07M7DGX26?ref=myi_title_dp
If you need any other help please contact us by service@mcwlaser.com

**Q: What is the focus distance of this lens?**
A: Thank for your interest in our products.
The lens focal length is 63.5mm/2.5" as the listing description. If you need any help please contact us by sales@mcwlaser.com

**Q: Are these Meniscus or Plano-Convex lenses?**
A: 63.5mm and 50.8mm FL lenses are meniscus.
Other 25.4mm, 38.1mm, 76.2mm,101.6mm FL lenses are Plano-Convex

## Customer Reviews

### ⭐⭐⭐⭐⭐ Performance
*by J***N on 21 March 2025*

Fantastic lens- works great

### ⭐⭐⭐⭐⭐ 150W+ Just fine
*by J***E on 26 July 2020*

I use this in my 20mm 2.5" head for my machine and it does just fine cutting at 150w. It actually had a smaller spot size than the factory original. cleans easily (if done regularly) However, the focus point may not actually be exactly 2.5". I kept checking line width with an engraving test till I got the height just right and I use that as my set point for engraving and about 1mm lower (1/32" for you imperials out there) for cutting thicker materials. I regularly slice 6mm ply and MDF with no issues at about 125w.

### ⭐⭐⭐⭐⭐ gran pieza
*by D***D on 11 March 2024*

buen material

## Frequently Bought Together

- CNCOLETECH CO2 Laser Lens 20mm FL:2.5" or 63.5mm Laser Mirror CVD ZnSe Focus Focal Lens for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W
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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-28*