--- product_id: 34112082 title: "AmScope 20X Plan Achromatic Objective Lens with Knurled Ring" brand: "amscope" price: "₩193419" currency: KRW in_stock: true reviews_count: 5 category: "Am Scope" url: https://www.desertcart.kr/products/34112082-amscope-20x-plan-achromatic-objective-lens-with-knurled-ring store_origin: KR region: South Korea --- # Plan achromatic flat field correction 20X magnification power RMS thread, 160mm tube length AmScope 20X Plan Achromatic Objective Lens with Knurled Ring **Brand:** amscope **Price:** ₩193419 **Availability:** ✅ In Stock ## Summary > 🔬 Elevate your microscope game—see the unseen in stunning clarity! ## Quick Answers - **What is this?** AmScope 20X Plan Achromatic Objective Lens with Knurled Ring by amscope - **How much does it cost?** ₩193419 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/34112082-amscope-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 knurled ring ensures quick, secure lens changes without slipping—efficiency meets comfort. - • **Optimized for Imaging:** Ideal for capturing stunning microphotography with cameras, enhancing your scientific presentations and social sharing. - • **Plan Achromatic Optics:** Experience edge-to-edge sharpness and true color correction that eliminates chromatic aberrations for flawless imaging. - • **Precision 20X Magnification:** Zoom into micro details with crystal-clear 20X power, perfect for professional and hobbyist microscopy. - • **Universal DIN/JIS Compatibility:** Fits most compound microscopes with standard RMS threading and 160mm tube length—plug & play with your setup. ## Overview The AmScope 20X Plan Achromatic Objective Lens delivers professional-grade 20X magnification with advanced achromatic and plan field corrections, ensuring flat, color-accurate images across the entire field of view. Designed to fit standard DIN/JIS compound microscopes with a 160mm tube length and RMS threading, it features a knurled ring for easy handling. Perfect for both scientific exploration and high-quality microphotography, this lens is a must-have upgrade for serious microscopy enthusiasts. ## 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 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 | #130 in Microscope Lenses | | Brand | AmScope | | Color | Black, Multicolor, Off-White, Silver | | Compatible Devices | Personal Computer, Laptop | | Customer Reviews | 3.5 out of 5 stars 9 Reviews | | Enclosure Material | Glass | | Light Source Type | LED | | Magnification Maximum | 20 x | | Manufacturer | United Scope, LLC | | Manufacturer Part Number | PA20XK-V300 | | Material | Glass | | Model Number | PA20XK-V300 | | Objective Lens Description | Achromatic | | Power Source | Battery Powered | | UPC | 840979106361 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** AmScope - **Color:** Black, Multicolor, Off-White, Silver - **Compatible Devices:** Personal Computer, Laptop - **Light Source Type:** LED - **Magnification Maximum:** 20 x - **Manufacturer:** United Scope, LLC - **Material:** Glass - **Objective Lens Description:** Achromatic - **Power Source:** Battery Powered - **UPC:** 840979106361 ## Images ![AmScope 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.kr/products/34112082-amscope-20x-plan-achromatic-objective-lens-with-knurled-ring](https://www.desertcart.kr/products/34112082-amscope-20x-plan-achromatic-objective-lens-with-knurled-ring) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-05-12*