---
product_id: 34112082
title: "20X Plan Achromatic Objective Lens with Knurled Ring"
brand: "amscope"
price: "C$8227"
currency: NIO
in_stock: true
reviews_count: 5
category: "Am Scope"
url: https://www.desertcart.ni/products/34112082-20x-plan-achromatic-objective-lens-with-knurled-ring
store_origin: NI
region: Nicaragua
---

# Plan achromatic flat field correction 20X magnification power Standard DIN/JIS thread fit 20X Plan Achromatic Objective Lens with Knurled Ring

**Brand:** amscope
**Price:** C$8227
**Availability:** ✅ In Stock

## Summary

> 🔬 Elevate your microscope’s vision—see what others miss!

## Quick Answers

- **What is this?** 20X Plan Achromatic Objective Lens with Knurled Ring by amscope
- **How much does it cost?** C$8227 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/34112082-20x-plan-achromatic-objective-lens-with-knurled-ring)

## Best For

- amscope enthusiasts

## Why This Product

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

## Key Features

- • **Knurled Ring Grip:** Ergonomic design for quick, confident lens changes during critical observations.
- • **Plan Achromatic Optics:** Experience edge-to-edge sharpness and true color correction for flawless imaging.
- • **Optimized 160mm Tube Length:** Engineered for perfect focus alignment on standard microscopes, ensuring professional results.
- • **Seamless DIN/JIS Compatibility:** Fits most compound microscopes effortlessly—upgrade without the hassle.
- • **Crystal-Clear 20X Magnification:** Zoom into micro details with precision and clarity that elevates your research game.

## Overview

The AmScope 20X Plan Achromatic Objective Lens is a precision-engineered microscope accessory designed to deliver sharp, color-corrected images with flat field clarity. Featuring a 20X magnification, 0.40 numerical aperture, and standard DIN/JIS threading, it fits most compound microscopes with a 160mm tube length. Its knurled ring ensures easy handling, making it an essential upgrade for professionals and enthusiasts seeking enhanced microscopic detail and reliability.

## Description

This is a 20X DIN-standard objective lens for compound microscopes. It features achromatic color-correction, and plan field-correction. Features & Specifications: Magnification: 20X NA: .40 Optical Working Distance: 1.16mm Thread: RMS Mechanical Tube Length: 160mm Cover Glass Thickness:0.17mm Color Correction: achromatic Field Correction: plan Immersion Medium: none Nosecone: spring

Review: Mixed feelings - As a beginner (74 year old) I bought a new AmScope T490B-DKO 40X-2000X Trinocular Compound Darkfield Microscope with Oil Condenser, which had 4X, 10X, 40X, and 100X oil, all Four are DIN Achromatic Objectives. Being a beginner I read everything I could on microscopes, and a customer review on the AmScope A20X 20X Achromatic Microscope Objective said, “Excellent objective between 10x and 40x. Great for microlife. Wanted a Plan obj. but not available from Amscope in this magnification. I have to admit I don't miss the fact that it is not Plan. I gladly recommend this objective.” Yes, what he said about a Plan obj. sounded good, and now things have changed, the Plan obj. is now offered. After reading more about microscopes, this ($53.99) sounded better than the simple 20X ($23.99) since I want to use a camera on pond water monsters. It is fun to learn, but I suspect I had over idealized the Plan optics. Today I got a first chance to try it out on a few slides. Yes, it is beautiful, and the views are flat out to the edges, but it was not parfocal with my other objectives. This means that when I go from 10x to 20x I will need to refocus, then when I go to 40x I will need to refocus again. I have mixed feelings so far. I hope in the next few weeks I will get over this irritation, and it will become automatic that I turn the focus in the right direction. I suppose it will be like riding a bike, but for now it is a big distraction. I have yet to take photos, so that may be nice too. It may be that I will change all my objective lens so it will then become parfocal again. But for now I have also purchased a 60x non-Plan so I am running out of places to mount all these objectives. I need to take out the 100x and the 60x to use this new 20x. A more expensive microscope would give me 5 places for objectives, but after all I am a beginner. I will need to do this hobby for a few years and then see where it takes me. I give the objective a rating of 5, because it is beautiful and it seems well made (but I am a beginner). I still have mixed feelings, but I is my fault for not knowing more about focus.
Review: horribly made product!! - What a cheap made product. this is the scond one i have recieved due to now both having air bubbles in the front glass. i would not waste you time and effort buying this!

## Features

- This brand new 20X Plan Achromatic microscope objective lens fits common size (DIN/JIS standard) compound microscopes
- Plan Achromatic Corrections
- Magnification: 20X
- NA: 0.40
- Tube Length: 160mm

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01G4CC4Z6 |
| Best Sellers Rank | #98 in Microscope Lenses |
| Customer Reviews | 3.3 3.3 out of 5 stars (9) |
| Date First Available | May 24, 2016 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 3.84 ounces |
| Item model number | PA20XK-V300 |
| Manufacturer | United Scope, LLC |
| Product Dimensions | 2.4 x 1.4 x 1.4 inches |

## Product Details

- **Brand:** AmScope
- **Color:** Black, Multicolor, Off-White, Silver
- **Compatible Devices:** Personal Computer, Laptop
- **Magnification Maximum:** 20 x
- **Manufacturer:** United Scope, LLC
- **Material:** Glass
- **Objective Lens Description:** Achromatic
- **Power Source:** Battery Powered
- **UPC:** 840979106361

## Images

![20X Plan Achromatic Objective Lens with Knurled Ring - Image 1](https://m.media-amazon.com/images/I/61tzzGMDXvL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Mixed feelings
*by W***E on May 14, 2020*

As a beginner (74 year old) I bought a new AmScope T490B-DKO 40X-2000X Trinocular Compound Darkfield Microscope with Oil Condenser, which had 4X, 10X, 40X, and 100X oil, all Four are DIN Achromatic Objectives. Being a beginner I read everything I could on microscopes, and a customer review on the AmScope A20X 20X Achromatic Microscope Objective said, “Excellent objective between 10x and 40x. Great for microlife. Wanted a Plan obj. but not available from Amscope in this magnification. I have to admit I don't miss the fact that it is not Plan. I gladly recommend this objective.” Yes, what he said about a Plan obj. sounded good, and now things have changed, the Plan obj. is now offered. After reading more about microscopes, this ($53.99) sounded better than the simple 20X ($23.99) since I want to use a camera on pond water monsters. It is fun to learn, but I suspect I had over idealized the Plan optics. Today I got a first chance to try it out on a few slides. Yes, it is beautiful, and the views are flat out to the edges, but it was not parfocal with my other objectives. This means that when I go from 10x to 20x I will need to refocus, then when I go to 40x I will need to refocus again. I have mixed feelings so far. I hope in the next few weeks I will get over this irritation, and it will become automatic that I turn the focus in the right direction. I suppose it will be like riding a bike, but for now it is a big distraction. I have yet to take photos, so that may be nice too. It may be that I will change all my objective lens so it will then become parfocal again. But for now I have also purchased a 60x non-Plan so I am running out of places to mount all these objectives. I need to take out the 100x and the 60x to use this new 20x. A more expensive microscope would give me 5 places for objectives, but after all I am a beginner. I will need to do this hobby for a few years and then see where it takes me. I give the objective a rating of 5, because it is beautiful and it seems well made (but I am a beginner). I still have mixed feelings, but I is my fault for not knowing more about focus.

### ⭐ horribly made product!!
*by C***M on October 6, 2025*

What a cheap made product. this is the scond one i have recieved due to now both having air bubbles in the front glass. i would not waste you time and effort buying this!

### ⭐⭐⭐⭐⭐ Add 20x to your 'scope!
*by D***R on May 20, 2019*

Very nice objective. Broad flat field. Great for hunting protzoans.

## Frequently Bought Together

- AmScope 20X Plan Achromatic Objective Lens with Knurled Ring
- AmScope 60X Plan Achromatic Objective Lens with Knurled Ring

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-02-26*