---
product_id: 1611835
title: "EF 2.0X III Telephoto Extender for Canon Super Telephoto Lenses"
brand: "canon"
price: "27656989₫"
currency: VND
in_stock: true
reviews_count: 13
category: "Canon"
url: https://www.desertcart.vn/products/1611835-ef-2-0x-iii-telephoto-extender-for-canon-super-telephoto
store_origin: VN
region: Vietnam
---

# dust & water resistant 2x magnification boost built-in microcomputer sync EF 2.0X III Telephoto Extender for Canon Super Telephoto Lenses

**Brand:** canon
**Price:** 27656989₫
**Availability:** ✅ In Stock

## Summary

> 📸 Elevate your lens game—capture what others can’t!

## Quick Answers

- **What is this?** EF 2.0X III Telephoto Extender for Canon Super Telephoto Lenses by canon
- **How much does it cost?** 27656989₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/1611835-ef-2-0x-iii-telephoto-extender-for-canon-super-telephoto)

## Best For

- canon enthusiasts

## Why This Product

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

## Key Features

- • **Rugged & Ready:** Dustproof and water-resistant design built for demanding outdoor shoots.
- • **Double Your Reach:** Transforms your lens focal length by 2x for ultra-telephoto power.
- • **Compact Powerhouse:** Lightweight (11.5 oz) and portable—perfect for professionals on the move.
- • **Crystal Clear Shots:** Advanced Spectra and Fluorine coatings minimize ghosting, flare, and smudges.
- • **Seamless Smart Sync:** Built-in microcomputer ensures flawless communication between camera and lens.

## Overview

The Canon EF 2.0X III Telephoto Extender doubles the focal length of select Canon EF L-series lenses, delivering professional-grade optical performance with minimal image degradation. Featuring a built-in microcomputer for seamless camera-lens communication, advanced coatings to reduce flare and smudges, and rugged dust- and water-resistant construction, this lightweight extender is an essential tool for wildlife, sports, and outdoor photographers seeking extended reach without compromising quality.

## Description

From the Manufacturer Designed to extend a lenses focal length by a factor of 2x, the redesigned Canon Extender EF 2X III delivers optical performance on par with the finest Canon super telephoto lenses. It features a built-in microcomputer for seamless communication among camera body, lens and extender, features careful lens placement and coatings to minimize ghosting, flare and chromatic aberration, and even has a new Fluorine coating that keeps soiling, smears, fingerprints to a minimum. Extender EF 2X III meets necessary standards in terms of rugged, dustproof and water resistant construction, and should be in every professional's camera bag. Technical SpecificationsFocal Length & Maximum Aperture Magnification: 2.0x Lens Construction 9 elements in 5 groups Max. Diameter x Length, Weight 2.8 x 2.1 in, 11.5 oz / 72.0 x 52.7mm, 325g Product Description The Canon Extender EF 2x III is designed to extend a lenses focal length by a factor of 2x, the redesigned Canon Extender EF 2x III delivers optical performance on par with the finest Canon super telephoto lenses. It features a built-in microcomputer for seamless communication among camera body, lens and extender, features careful lens placement and coatings to minimize ghosting, flare and chromatic aberration, and even has a new Fluorine coating that keeps soiling, smears, fingerprints to a minimum. Extender EF 2x III meets necessary standards in terms of rugged, dustproof and water-resistant construction, and should be in every professional's camera bag.

Review: Great with the 70-200 F/2.8, on IS II even better - I got this to pair with my 70-200mm F/2.8 IS II since I needed a bit more reach, and didn't want to spring for a 300mm or 400mm lens. I'm extremely happy with it, and have to say that on a high quality lens, like the 70-200/2.8 IS II, there is hardly any loss of functionality at all. Yes, you do lose two stops, but getting a 400mm F/5.6 is not bad at all, and the 4 stops of the IS on the IS II certainly helps a lot. And these days, with the ability to shoot high ISOs without much noise (such as on the 5D3), it's not an issue getting clear shots at 1/500s or faster during the day. There is some SLIGHT image degradation, to be expected, but it is not noticeable at all unless you are seriously pixel peeping. Only at 100% crops would you be able to tell the difference, and the gain from the extra focal length far outweighs the slight loss in image quality. You do also get slower autofocus, again, because of the reduced effective aperture size (less light passing through, so it's harder for your camera to detect focus). The 70-200/2.8 IS II has extremely quick autofocus to begin with, so the reduced speed is not too bad. On slower autofocus lenses (such as if you use this extender for macro work, like on the 180mm F/3.5L Macro), the autofocus is nearly downright impossible and you may just be better off using full time manual focus. You also won't be able to use all the focus points that you're used to using, since you'll only be able to use the points that respond to f/5.6 or slower with a F/2.8 lens. On the 5D3, this means only the center rectangle of points (about 21 cross type points). The 1DS3 and 1DX give you a bit more focus point options at f/5.6. And on lower end cameras, you may be only able to use your center AF point. On slower lenses, such as f/4 or slower, you may be limited to manual focus only. That's why I really only recommend using a 2x extender on an f/2.8 lens. On slower lenses, you're better off using a 1.4x extender. The compact size and relatively light weight of the 2x extender makes it a must-bring any time I bring my 70-200 outdoors. Plus it gives me the flexibility of having either a 70-200/2.8 or a 140-400/5.6 at any time I want. It's especially great to use for wildlife (especially birds and other animals) and sports, if you're shooting during the day. For anything more serious, or in lower light, you'll need to spring for a 300/2.8 or 400/2.8, which are prohibitively expensive unless you're using it regularly for your full time job.
Review: Canon always brings out the best - Being used until now. Quality is awesome as always from canon. Automatically focus. Images come out sharp and crisp. Color is perfect. Easy to use.

## Features

- Compatible with Select EF Mount Lenses. Note: This lens is only compatible with fixed focal length L-series lenses 135mm and over, as well as the EF 70-200/2.8L, EF 70-200/2.8L IS, EF 70-200/4L, and EF 100-400/4.5-5.6L
- 2.0x magnification factor
- 9 elements in 5 groups lens construction
- Spectra coating reduces ghosting/flare
- Dust and water resistant

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0040X4PV8 |
| Best Sellers Rank | #458 in SLR Camera Lenses |
| Brand | Canon |
| Built-In Media | Lens |
| Camera Lens | Canon EF 2.0X III Telephoto Extender for Canon Super Telephoto Lenses |
| Camera Lens Description | Canon EF 2.0X III Telephoto Extender for Canon Super Telephoto Lenses |
| Color | White |
| Compatible Camera Mount | Canon EF |
| Compatible Mountings | Canon EF |
| Customer Reviews | 4.4 out of 5 stars 580 Reviews |
| Exposure Control Type | Manual |
| Focal Length Description | 2x [NA] |
| Focus Type | Auto Focus |
| Global Trade Identification Number | 00013803122152, 00572380293346 |
| Image stabilization | Optical |
| Item Weight | 325 Grams |
| Lens | Telephoto |
| Lens Coating Description | Fluorine Coating |
| Lens Design | Prime |
| Lens Fixed Focal Length | 2 Millimeters |
| Lens Mount | Canon EF |
| Lens Type | Telephoto |
| Manufacturer | Canon Cameras US |
| Manufacturer Part Number | 4410B002 |
| Maximum Aperture | 2 f |
| Maximum Focal Length | 2 Millimeters |
| Media Type | ProductImage |
| Minimum Aperture | 2 f |
| Minimum Focal Length | 2 Millimeters |
| Model Name | extender ef |
| Model Number | 4410B002 |
| Real Angle Of View | 7.1 Degrees |
| UPC | 013803122152 572380293346 |
| Unit Count | 1.0 Count |
| Warranty Description | 1 year limited |
| Water Resistance Level | Water Resistant |
| Zoom Ratio | 2:1 |

## Product Details

- **Brand:** Canon
- **Camera Lens Description:** Canon EF 2.0X III Telephoto Extender for Canon Super Telephoto Lenses
- **Compatible Mountings:** Canon EF
- **Focal Length Description:** 2x [NA]
- **Lens Type:** Telephoto

## Images

![EF 2.0X III Telephoto Extender for Canon Super Telephoto Lenses - Image 1](https://m.media-amazon.com/images/I/61r5q7jsbSL.jpg)
![EF 2.0X III Telephoto Extender for Canon Super Telephoto Lenses - Image 2](https://m.media-amazon.com/images/I/61FWp7w13YL.jpg)
![EF 2.0X III Telephoto Extender for Canon Super Telephoto Lenses - Image 3](https://m.media-amazon.com/images/I/71MC8459vcL.jpg)
![EF 2.0X III Telephoto Extender for Canon Super Telephoto Lenses - Image 4](https://m.media-amazon.com/images/I/61nZoTSYp2L.jpg)
![EF 2.0X III Telephoto Extender for Canon Super Telephoto Lenses - Image 5](https://m.media-amazon.com/images/I/51wlrH7Cl5L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great with the 70-200 F/2.8, on IS II even better
*by J***S on February 2, 2013*

I got this to pair with my 70-200mm F/2.8 IS II since I needed a bit more reach, and didn't want to spring for a 300mm or 400mm lens. I'm extremely happy with it, and have to say that on a high quality lens, like the 70-200/2.8 IS II, there is hardly any loss of functionality at all. Yes, you do lose two stops, but getting a 400mm F/5.6 is not bad at all, and the 4 stops of the IS on the IS II certainly helps a lot. And these days, with the ability to shoot high ISOs without much noise (such as on the 5D3), it's not an issue getting clear shots at 1/500s or faster during the day. There is some SLIGHT image degradation, to be expected, but it is not noticeable at all unless you are seriously pixel peeping. Only at 100% crops would you be able to tell the difference, and the gain from the extra focal length far outweighs the slight loss in image quality. You do also get slower autofocus, again, because of the reduced effective aperture size (less light passing through, so it's harder for your camera to detect focus). The 70-200/2.8 IS II has extremely quick autofocus to begin with, so the reduced speed is not too bad. On slower autofocus lenses (such as if you use this extender for macro work, like on the 180mm F/3.5L Macro), the autofocus is nearly downright impossible and you may just be better off using full time manual focus. You also won't be able to use all the focus points that you're used to using, since you'll only be able to use the points that respond to f/5.6 or slower with a F/2.8 lens. On the 5D3, this means only the center rectangle of points (about 21 cross type points). The 1DS3 and 1DX give you a bit more focus point options at f/5.6. And on lower end cameras, you may be only able to use your center AF point. On slower lenses, such as f/4 or slower, you may be limited to manual focus only. That's why I really only recommend using a 2x extender on an f/2.8 lens. On slower lenses, you're better off using a 1.4x extender. The compact size and relatively light weight of the 2x extender makes it a must-bring any time I bring my 70-200 outdoors. Plus it gives me the flexibility of having either a 70-200/2.8 or a 140-400/5.6 at any time I want. It's especially great to use for wildlife (especially birds and other animals) and sports, if you're shooting during the day. For anything more serious, or in lower light, you'll need to spring for a 300/2.8 or 400/2.8, which are prohibitively expensive unless you're using it regularly for your full time job.

### ⭐⭐⭐⭐⭐ Canon always brings out the best
*by B***. on May 13, 2026*

Being used until now. Quality is awesome as always from canon. Automatically focus. Images come out sharp and crisp. Color is perfect. Easy to use.

### ⭐⭐⭐⭐⭐ Educate yourself first...
*by S***Y on January 30, 2011*

This Extender works very well! What you must realize is that the auto focus works on some and not all lenses. It's not fair to give it a 1 star rating because of the compatibility, although Canon isn't very clear and actually misleading. I have used this extender with my 70-200mm 2.8 MKII lens and it is surprisingly sharp! I say this, but I understand that adding this Extender (or any Extender) you will loose some sharpness and also F stops. From the research that I did, and my personal results, this extender work much better with MKII lenses. The results at 400mm are very exceptable when stopped down. If your looking for outstanding sharpness and fast apertures, the solution would be a $7,000 dollar option. I recommend this extender to anyone with a 2.8L series lens, in some cases, the 1.4X III is sharpness is very important for what your doing.

## Frequently Bought Together

- Canon EF 2.0X III Telephoto Extender for Canon Super Telephoto Lenses
- Canon EF 70-200mm f/2.8L IS III USM Lens for Canon Digital SLR Cameras, White - 3044C002
- Canon EF 1.4X III Telephoto Extender for Canon Super Telephoto Lenses

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-06-08*