---
product_id: 394151998
title: "4X Plan Achromatic Objective Lens with Knurled Ring"
brand: "amscope"
price: "22.45 OMR"
currency: OMR
in_stock: true
reviews_count: 5
category: "Am Scope"
url: https://www.desertcart.com.om/products/394151998-4x-plan-achromatic-objective-lens-with-knurled-ring
store_origin: OM
region: Oman
---

# Plan achromatic color & field correction 4X magnification power Standard 160mm tube length 4X Plan Achromatic Objective Lens with Knurled Ring

**Brand:** amscope
**Price:** 22.45 OMR
**Availability:** ✅ In Stock

## Summary

> 🔬 Elevate your microscopy game with flawless clarity and pro-level precision!

## Quick Answers

- **What is this?** 4X Plan Achromatic Objective Lens with Knurled Ring by amscope
- **How much does it cost?** 22.45 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/394151998-4x-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

- • **Durable knurled ring:** Ergonomic grip for quick, confident lens changes during critical observations.
- • **Seamless compatibility:** Fits all DIN/JIS standard compound microscopes with RMS threading.
- • **Crystal-clear precision:** Achromatic lens eliminates color fringing for sharp, true-to-life images.
- • **Optimal working distance:** 29.04mm distance balances magnification and ease of sample manipulation.
- • **Wide, flat viewing field:** Plan correction ensures edge-to-edge clarity—no distortion, no compromise.

## Overview

The AmScope 4X Plan Achromatic Objective Lens is a high-quality, DIN-standard microscope lens designed for compound microscopes. Featuring 4X magnification, achromatic color correction, and plan field correction, it delivers sharp, distortion-free images across the entire field of view. With a 160mm tube length and 29.04mm working distance, it ensures compatibility and ease of use, making it an essential upgrade for professionals seeking reliable, precise microscopy performance.

## Description

This is a 4X DIN-standard objective lens for compound microscopes. It features achromatic color-correction, and plan field-correction. Features & Specifications: - Magnification: 4X - NA: .10 - Optical Working Distance: 29.04mm - Thread: RMS - Mechanical Tube Length: 160mm - Cover Glass Thickness:0.17mm - Color Correction: achromatic - Field Correction: plan - Immersion Medium: none - Nosecone: fixed

Review: Lo he comparado con el JML 21, que también tengo (me costó 350€) y este objetivo se acerca bastante en calidad. Lo que dado su precio es una compra muy recomendable. Su uso ha sido en fotografía de macro extremo con tubos de extensión.
Review: Encontré este objetivo Amscope porque vi en internet que lo recomendaban mucho para Macrofotografía, está genial y funciona a la perfección, muy útil para empezar con Macrofotografía. Feliz con la compra, aparte sí llegó en buenas condiciones

## Features

- This brand new 4X Plan Achromatic microscope objective lens fits common size (DIN/JIS standard) compound microscopes
- Plan Achromatic Corrections
- Magnification: 4X
- NA: 0.10
- Tube Length: 160mm

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01G4CCGRC |
| Best Sellers Rank | #32 in Microscope Lenses |
| Date First Available | May 24, 2016 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.08 ounces |
| Item model number | PA4XK-V300 |
| Manufacturer | United Scope, LLC |
| Product Dimensions | 2.4 x 1.4 x 1.4 inches |

## Product Details

- **Colour:** Black
- **Light source type:** LED
- **Material:** Glass
- **Max. magnification:** 4 x
- **Real angle view:** 45 Degrees

## Images

![4X Plan Achromatic Objective Lens with Knurled Ring - Image 1](https://m.media-amazon.com/images/I/51mkckZCetL.jpg)

## Questions & Answers

**Q: Does it come with instructions for attaching it?**
A: No, but i can help a little bit.
This objective is known as a finite objective so you'll have to position it 160mm from the camera sensor.
The other type of objective is a infinite objective which requires a 200mm lens to focus known as a tube lens.
You'll need an RMS adapter, mine is a RMS to M42 for example lots on ebay.
Then you'll need an M42 to whatever your camera mount is.
You'll need some kind of extension tubes to around 160mm between the objective and the cameras sensor. Theres probably a little line on the camera body somewhere to show that
Theres lots more info about this kind of thing here: http://extreme-macro.co.uk/

**Q: Does the objective lens come with a container for it?**
A: Yes a normal objective plastic threaded sleeve

**Q: Can I lower the magnification to 2 times rather than 4 or would I need to buy a different lens for that?**
A: Yes you can. You need to shorten the overall distance from lens to sensor but yes you can. A set of bellows really helps with this.

**Q: Will this fit an old b&l dynazoom. i want to lessen the magnification from the 10x to 4x?**
A: Look at your 10x lens. To fit three things should match: the optical design must match - if you see an infinity symbol on your 10x lens -- the lens do NOT match.
Next the the focal length must match, if you see 170/ on you 10x lens - your microscope is RMS, it can work - but requires an adapter - not worth it . 
If ups see 160/ it is OK, and also the third thing - the thread - most likely will match as well.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by C***N on 23 June 2019*

Lo he comparado con el JML 21, que también tengo (me costó 350€) y este objetivo se acerca bastante en calidad. Lo que dado su precio es una compra muy recomendable. Su uso ha sido en fotografía de macro extremo con tubos de extensión.

### ⭐⭐⭐⭐⭐ Review
*by S***M on 20 December 2024*

Encontré este objetivo Amscope porque vi en internet que lo recomendaban mucho para Macrofotografía, está genial y funciona a la perfección, muy útil para empezar con Macrofotografía. Feliz con la compra, aparte sí llegó en buenas condiciones

### ⭐⭐⭐⭐⭐ Review
*by J***H on 19 October 2017*

I wanted a 4X objective for my Nikon Labophot microscope. After spending a lot of time thinking about getting a CFN objective I read a little about this objective and decided to take a chance. At this price, it really can't be beat. Works great on the Labophot and I would have had to spend several times as much for an objective which was a real improvement over it. I have it hooked up to an APS-C camera. I posted one image of an aphid exactly as it came out of the camera. and one image after using a bit of focus stacking and Photoshop. As you can see, it can just almost fill an APS-C sensor. It may be possible to fill it with a bit more extension than I had. While I have not yet tried to use it for this application this lens is getting a lot of use for extreme macro photography. Typically rather than using a microscope people make direct connections to a camera. The idea here is get a series of adapters and extension tubes to connect the objective 160mm away from a DSLR/Mirrorless camera sensor. Then typically a macro rail such as a Stackshot is used to take a series of photos and a software package like Zerene Stacker is used to make a final image. Since this is a finite lens it does not require a tube lens and is very simple to hook up. Unusual for finite objectives it does not seem to require significant corrections from the eye piece and the fact it was designed to work with a cover slip apparently does not degrade the image much either. At this price point it really is an obvious choice.

## Frequently Bought Together

- AmScope 4X Plan Achromatic Objective Lens with Knurled Ring
- RMS Thread for Microscope Objective to M42 x 1 mm Converter Cone Only Adapter
- FotoHigh Macro and Close-Up Photography Adapter for Microscope Objective to Canon EF EOS Nikon AI DSLR/SLR Camera (for Nikon AI)

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*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-03-21*