Canon EF Extender 2X III
Doubles the focal length of compatible Canon EF L-series telephoto lenses while retaining full electronic communication between lens and body for reliable autofocus and metering. Its Spectra and fluorine coatings suppress ghosting and resist dust and moisture, making it reliable for outdoor portrait work. This teleconverter is best for portrait photographers using fast EF super-telephoto primes who need to extend their reach without adding significant bulk.
Resumen
The 30-Second Version
This thing doubles your focal length and halves your light. For the right photographer, it's the best $475 you can spend.
Pros & Cons
Ventajas
- Doubles your focal length without a new lens 90th
- Optical quality is a cut above cheaper TCs 88th
- Weather-sealed build matches L-series glass
- Retains full AF and EXIF communication
Desventajas
- You lose two full stops of light, no way around it
- Autofocus can hunt or die on slower non-pro bodies
- A dated design that hasn't seen an update in years
- Real-world sharpness takes a noticeable hit wide open
Las pruebas
Performance
What honestly surprised us is how well the optics hold up. With a 2x teleconverter, you expect your image to look like it was shot through a Coke bottle, but Canon's 9-element design and Spectra coatings keep ghosting and flare to a minimum. Our database puts it well above average for bokeh and aperture handling given what it is. The communication between lens and camera is seamless, delivering reliable metering and EXIF data. The weak spot is clear: this is not for macro work, where it lands in the bottom 14th percentile. It's a specialist tool, and it knows it.
Specifications
Full Specifications
Optics
| Type | Zoom |
| Elements | 9 |
| Groups | 5 |
Aperture
| Max Aperture | f/2 |
Build
| Mount | Canon EF |
| Weight | 0.3 kg / 0.7 lbs |
Focus
| Max Magnification | 2.0x |
vs Competition
You might look at something like the Sigma Contemporary 28-70mm f/2.8 and wonder why you'd ever bother with a teleconverter. Those are completely different tools for completely different jobs. The Sigma is a fast standard zoom; the Extender is for turning a 70-200mm into a 140-400mm monster. If you're comparing, you're probably deciding between this 2x and Canon's own 1.4x Extender. The 1.4x costs less and only robs you of one stop, but the 2x gives you that wild, frame-filling reach. It's a simple choice: do you need the most reach possible, or the brightest possible viewfinder?
| Spec | Canon EF Extender 2X III | Sigma Contemporary 18-50mm f/2.8 DC DN | Tamron Di III 17-70mm f/2.8 Di III-A VC RXD | Nikon NIKKOR Z 17-28mm f/2.8 | Panasonic Leica DG Vario-Elmarit H-ES12035 | Sony E PZ 16-50mm f/3.5-5.6 OSS |
|---|---|---|---|---|---|---|
| Focal Length | - | 18-50mm | 17-70mm | 17-28mm | 12-35mm | 16-50mm |
| Max Aperture | f/2 | f/2.8 | f/2.8 | f/2.8 | f/2.8 | f/3.5 |
| Mount | Canon EF | Sony E | Sony E | Nikon Z | Micro Four Thirds | Sony E |
| Stabilization | false | false | true | false | true | true |
| Weather Sealed | false | true | true | true | true | true |
| Weight (g) | 326 | 290 | 544 | 450 | 306 | 107 |
| AF Type | - | stepping motor | RXD | Stepping Motor | Autofocus | Autofocus |
| Lens Type | zoom | zoom | zoom | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Producto | AF | Bokeh | Build | Macro | Optical | Aperture | Versatility | Valoración social | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| Canon EF Extender 2X III | 53.8 | 87.8 | 64.2 | 13.9 | 39.1 | 89.6 | 33.6 | 29.1 | 36.7 |
| Sigma Contemporary 18-50mm f/2.8 DC DN Compare | 87.7 | 80.6 | 86.5 | 90.8 | 82.5 | 83 | 78.5 | 89.8 | 36.7 |
| Tamron Di III 17-70mm f/2.8 Di III-A VC RXD Compare | 53.8 | 85.9 | 69.8 | 84.9 | 91 | 83 | 89.4 | 85.6 | 82.5 |
| Nikon NIKKOR Z 17-28mm f/2.8 Compare | 87.7 | 85.9 | 76 | 84.9 | 88.3 | 83 | 68 | 70.6 | 36.7 |
| Panasonic Leica DG Vario-Elmarit H-ES12035 Compare | 53.8 | 80.6 | 85.8 | 50.3 | 86.7 | 83 | 80.4 | 85.6 | 96.9 |
| Sony E PZ 16-50mm f/3.5-5.6 OSS Compare | 53.8 | 74 | 98.6 | 43.3 | 69 | 76.2 | 83.1 | 81.4 | 93.5 |
Precio
Value & Pricing
At $444 to $479, this is expensive but worth it if you shoot wildlife or sports with fast Canon L glass. It's a fraction of the cost of a 600mm or 800mm lens. Pairing this with a $400 kit lens is a recipe for frustration, but on the right body and lens, it's a deal.
Newegg 2 ofertas Desde 444 US$
Price History
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Overview
The Canon EF Extender 2X III is a cheat code for reach, plain and simple. It turns your compatible telephoto into a super-telephoto by doubling the focal length, and it does it while keeping surprisingly good image quality and weather sealing intact. But the one thing to know is that you pay for that reach with light. You lose two full stops, which can turn your bright f/2.8 lens into a slower f/5.6 and might cripple autofocus on non-pro camera bodies. If you understand that trade-off, it's one of the smartest additions you can make to your kit without buying a whole new lens.
Common Questions
Q: Will this work on my Canon 100-400mm lens?
Yes, but you need to know what you're getting into. Your f/4.5-5.6 lens becomes an f/9-11 lens. On most cameras, that means you'll lose autofocus entirely or it will be painfully slow. Only the pro 1D and newer R-series bodies can reliably focus at f/8 or smaller.
Q: Does it really cut the light by two stops?
Absolutely. An f/2.8 lens becomes f/5.6. That means your shutter speed will be four times longer at the same ISO, or your ISO will need to be four times higher. There's no cheating physics.
Who Should Skip This
If you're looking for a way to make your kit lens better for casual shooting, this isn't it. Go get a faster prime lens like a Canon 50mm f/1.8 instead. This extender is strictly for serious telephoto work on fast glass and pro bodies.
Verdict
The Canon EF Extender 2X III is a single-purpose tool that excels at that purpose. It's not for everyone, and it will punish you if you slap it on the wrong lens. But if you're a wildlife or sports shooter using a fast pro body and an f/2.8 or f/4 L-series lens, buy it. It's the best way to get absurd reach without taking out a second mortgage.
