---
product_id: 45799431
title: "CNCOLETECH CVD II-VI ZnSe CO2 Laser Lens Dia:20mm FL:38.1mm/1.5\" laser Focus lens for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W"
brand: "cncoletech"
price: "¥8768"
currency: JPY
in_stock: true
reviews_count: 13
category: "Cncoletech"
url: https://www.desertcart.jp/products/45799431-cncoletech-cvd-ii-vi-znse-co2-laser-lens-dia-20mm
store_origin: JP
region: Japan
---

# 38.1mm focal length precision High-temp laser resistance ≥99.5% transmittance CNCOLETECH CVD II-VI ZnSe CO2 Laser Lens Dia:20mm FL:38.1mm/1.5" laser Focus lens for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W

**Brand:** cncoletech
**Price:** ¥8768
**Availability:** ✅ In Stock

## Summary

> 🎯 Sharpen your laser game with precision that cuts through the noise!

## Quick Answers

- **What is this?** CNCOLETECH CVD II-VI ZnSe CO2 Laser Lens Dia:20mm FL:38.1mm/1.5" laser Focus lens for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W by cncoletech
- **How much does it cost?** ¥8768 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/45799431-cncoletech-cvd-ii-vi-znse-co2-laser-lens-dia-20mm)

## 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

- • **Crystal-Clear Precision:** Experience ultra-high 99.5% light transmittance for razor-sharp engraving and cutting.
- • **Built to Last Under Fire:** Double-sided solid coating ensures wiping resistance and extended durability under intense laser heat.
- • **Perfect Focus Every Time:** 38.1mm focal length engineered for pinpoint accuracy on every project.
- • **Premium CVD ZnSe Material:** Crafted from US II-VI high-class ZnSe for superior optical performance and reliability.
- • **Versatile Power Compatibility:** Optimized for 40W to 200W CO2 lasers, empowering your creative workflow without limits.

## Overview

The CNCOLETECH CVD II-VI ZnSe CO2 Laser Lens features a 20mm diameter and 38.1mm focal length, delivering exceptional ≥99.5% transmittance and high-temperature resistance. Designed for 40W-200W CO2 lasers, this lens offers double-sided solid coating for durability and precision polishing for optimal engraving and cutting performance.

## Description

Buy CNCOLETECH CVD II-VI ZnSe CO2 Laser Lens Dia:20mm FL:38.1mm/1.5" laser Focus lens for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W: Cutting Tools - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Good for thick material - I was having trouble with my old Full Spectrum MLE30 (K40 predecessor type). I was using ot for a couple types of plastic (Acrylic mostly, but some Kydex) as well as cutting heavy 10oz dual-tanned latigo leather. My problem was that in order to cut through the material, I was ending up with severe charring at the edges of the cut and often insufficient penetration. It had sat without use for a good 12 years and my assumption at first was that the tube was just bad. I was told this happened over time. Surprisingly, the tube was just about perfect. I definitely gained a little bit of performance switching to a name brand 35w tube, but not nearly what I thought I would. When that didn't really solve the problem, I re-leveled the table again, re-aligned the mirrors for about the fourth time, cleaned everything, and was at a loss. I thought about it for a while and did a little geometry in my head, and theorized that I could improve cut depth by going to a longer focal length. Reddit seemed to confirm that this was usually what people did for this sort of thing. The solution ended up being to switch from a 2" focal length to a 3" focal length for the thicker material, where the critical focus depth ended up going from 1-2mm to about 3-4mm and really reducing the charring and improving the consistency of cutting through. It's still not perfect, but going from rough cut to finished part takes about 1/4 of the time now and results in far less cleanup and failed parts. I do have to remove the honeycomb bed to use the 3" lens, but cutting leather usually doesn't resul;t in any issues.
Review: Drop in replacement for Boss Laser LS1420 - The 20mm FL:2" is a perfect drop-in replacement for the default focus lens on the Boss LS-1420 laser. Boss wants $100 for their lens but I found that this one was much cheaper and had all the same specs. So far I've run my laser for about 10 hours engraving and cutting 1/4" solid cedar and 1/8" baltic ply and am getting sharp engraves at 385mm/s, and clean single pass cuts. Just make sure you wipe your lens down often during jobs and get a good air compressor. My original lens lasted three years before I replaced it with this due to my own negligence. I've picked up another spare just in case I forget to wipe the lens down again. Make sure to pay attention to the direction of the curve on the lens, and also make sure to wipe down all your mirrors while you're swapping out the lens. Wear gloves and only handle the sides of the lens.

## Features

- Material: Hight class CVD Znse material (US II-VI)
- Diameter: 20mm/0.79"; Focal Length:38.1mm/1.5";Thickness:2.2-2.3mm;Transmittance: ≥99.5%;
- Double-sided solid coating,Wiping resistant,Extended durability,Precision slicing polishing and grinding processes,High temperature laser resistance,Excellent optical properties,High working efficiency.
- It's good for 40W/50W/80W/100W/130W/150W CO2 laser 10600nm 10.6um.
- It can be used for CO2 laser engraving and cutting well.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01DP2HECQ |
| Best Sellers Rank | #36,859 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #52 in Jewelry Making Engraving Machines & Tools #2,103 in Power Tools (Tools & Home Improvement) |
| Brand | CNCOLETECH |
| Brand Name | CNCOLETECH |
| Color | Fl:1.5"/38.1mm |
| Customer Reviews | 4.7 out of 5 stars 467 Reviews |
| Item Dimensions L x W | 0.79"L x 0.79"W |
| Manufacturer | Shanghai Top Nine Industiral Co.,Ltd |
| Manufacturer Part Number | IIVI-20-381 |
| Material | CVD ZnSe |
| Material Type | CVD ZnSe |
| Model Number | IIVI-20-381 |
| Number of Items | 1 |
| Operation Mode | Automatic |
| Product Dimensions | 0.79"L x 0.79"W |
| Style | CVD ZnSe Lens |
| Style Name | CVD ZnSe Lens |
| Unit Count | 1 Count |

## Product Details

- **Brand:** CNCOLETECH
- **Color:** Fl:1.5"/38.1mm
- **Material:** CVD ZnSe
- **Product Dimensions:** 0.79"L x 0.79"W
- **Style:** CVD ZnSe Lens

## Images

![CNCOLETECH CVD II-VI ZnSe CO2 Laser Lens Dia:20mm FL:38.1mm/1.5" laser Focus lens for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W - Image 1](https://m.media-amazon.com/images/I/51ZDozGaycL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good for thick material
*by C***D on August 14, 2026*

I was having trouble with my old Full Spectrum MLE30 (K40 predecessor type). I was using ot for a couple types of plastic (Acrylic mostly, but some Kydex) as well as cutting heavy 10oz dual-tanned latigo leather. My problem was that in order to cut through the material, I was ending up with severe charring at the edges of the cut and often insufficient penetration. It had sat without use for a good 12 years and my assumption at first was that the tube was just bad. I was told this happened over time. Surprisingly, the tube was just about perfect. I definitely gained a little bit of performance switching to a name brand 35w tube, but not nearly what I thought I would. When that didn't really solve the problem, I re-leveled the table again, re-aligned the mirrors for about the fourth time, cleaned everything, and was at a loss. I thought about it for a while and did a little geometry in my head, and theorized that I could improve cut depth by going to a longer focal length. Reddit seemed to confirm that this was usually what people did for this sort of thing. The solution ended up being to switch from a 2" focal length to a 3" focal length for the thicker material, where the critical focus depth ended up going from 1-2mm to about 3-4mm and really reducing the charring and improving the consistency of cutting through. It's still not perfect, but going from rough cut to finished part takes about 1/4 of the time now and results in far less cleanup and failed parts. I do have to remove the honeycomb bed to use the 3" lens, but cutting leather usually doesn't resul;t in any issues.

### ⭐⭐⭐⭐⭐ Drop in replacement for Boss Laser LS1420
*by C***W on October 20, 2022*

The 20mm FL:2" is a perfect drop-in replacement for the default focus lens on the Boss LS-1420 laser. Boss wants $100 for their lens but I found that this one was much cheaper and had all the same specs. So far I've run my laser for about 10 hours engraving and cutting 1/4" solid cedar and 1/8" baltic ply and am getting sharp engraves at 385mm/s, and clean single pass cuts. Just make sure you wipe your lens down often during jobs and get a good air compressor. My original lens lasted three years before I replaced it with this due to my own negligence. I've picked up another spare just in case I forget to wipe the lens down again. Make sure to pay attention to the direction of the curve on the lens, and also make sure to wipe down all your mirrors while you're swapping out the lens. Wear gloves and only handle the sides of the lens.

### ⭐⭐⭐⭐⭐ Great Product Fast Delivery
*by J***E on September 25, 2024*

Was literally burning through lenses left and right. Contacted manufacturer and they pointed me towards this lens. Such a difference in quality and performance when you have the right lens! If you have a CO2 Laser, this is the focal lens you need! My machine manufacturer wouldn't list the specs for replacement lenses because they want to sell to you after market parts. (Not mentioning names, but rhymes with Jonport. Due to other quality issues with this machine I vowed to NEVER spend another dime with that company. So I needed an outside source for replacement parts) Thanks!

## Frequently Bought Together

- CNCOLETECH CVD II-VI ZnSe CO2 Laser Lens Dia:20mm FL:38.1mm/1.5" laser Focus lens for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W
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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-11-02*