SKU: 10562558254

Canon EF 2X III Extender

Sale price$158.40 Regular price$176.00
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Description

Canon EF 2X III ExtenderCanon EF 2X III Extender Overview: The Canon EF 2X III Extender, also known as a teleconverter, is designed to increase the focal length of compatible Canon EF lenses by a factor of 2x. This extender is particularly useful for wildlife and sports photographers who need additional reach without switching lenses. It maintains high image quality and integrates seamlessly with Canon's L series and other compatible lenses, making it a valuable tool for

Canon EF 2X III Extender

Overview:

The Canon EF 2X III Extender, also known as a teleconverter, is designed to increase the focal length of compatible Canon EF lenses by a factor of 2x. This extender is particularly useful for wildlife and sports photographers who need additional reach without switching lenses. It maintains high image quality and integrates seamlessly with Canon's L-series and other compatible lenses, making it a valuable tool for extending your photographic reach.

Key Features:

  • Magnification:

    • 2x Magnification: Doubles the focal length of your compatible EF lens. For example, a 100mm lens becomes a 200mm lens, and a 70-200mm lens becomes a 140-400mm lens. This effectively gives you twice the telephoto reach.
  • Optical Design:

    • High-Quality Optics: Features a refined optical design to minimize image degradation. Canon's latest optical technologies help maintain image quality, sharpness, and contrast while reducing chromatic aberration and distortion.
  • Compatibility:

    • EF Lens Compatibility: Designed to work with Canon EF lenses, including L-series lenses. However, not all EF lenses are compatible. Generally, it works best with lenses that have a maximum aperture of f/4 or faster.
    • Autofocus Performance: Retains autofocus functionality when used with compatible lenses, though autofocus may slow down or be less accurate with lenses that have a maximum aperture of f/4 or slower.
  • Construction:

    • Durable Build: Constructed with robust materials to withstand rigorous use. The extender features weather-sealed construction to protect against dust and moisture, matching the rugged build quality of Canon L-series lenses.
  • Coating:

    • Super Spectra Coating: Reduces flare and ghosting while improving contrast and color accuracy. This helps ensure consistent image quality, even in challenging lighting conditions.
  • Construction and Design:

    • Compact and Lightweight: Designed to be portable and easy to use. The extender does not add excessive weight or bulk, making it convenient for extended shooting sessions.

Applications:

  • Wildlife Photography: Provides additional reach for photographing distant subjects, making it easier to capture wildlife without disturbing them.
  • Sports Photography: Enhances your ability to photograph sporting events from a distance, allowing you to get closer to the action.
  • Nature and Landscape Photography: Useful for capturing detailed shots of distant subjects in natural settings.

Included in the Box:

  • Canon EF 2X III Extender
  • Lens Caps (Front and Rear)
  • User Manual

Additional Information:

  • Usage Tips: When using the extender, be mindful of potential loss of light. A 2x extender effectively reduces the maximum aperture by two stops (e.g., f/2.8 becomes f/5.6), which can impact autofocus performance and depth of field.
  • Lens Compatibility: Ensure that your lens is compatible with the EF 2X III Extender by checking Canon’s compatibility list. The extender is optimized for use with Canon L-series lenses and other select EF lenses.

Summary:

The Canon EF 2X III Extender is a high-performance teleconverter that effectively doubles the focal length of compatible EF lenses. It offers excellent image quality, durability, and functionality, making it an ideal choice for photographers who need additional reach for wildlife, sports, and nature photography. With its robust build and advanced optical design, the EF 2X III Extender enhances your photographic capabilities while maintaining the performance standards expected from Canon’s professional gear.

Shipping Notes
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Exchange/Return Notes
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SKU: 10562558254

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JaroldHarold
Lowell, US
★★★★★ 5
Great product!
Style: 30 sqft
I can say this product makes a huge difference with road noise and is cleaner and easy to work with when applying compared to other mats that cost about the same price.
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Reviewed in the United States on February 14, 2026
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Iraq veteran 83
Omaha, US
★★★★★ 5
Very heavy and thick
Style: 30 sqft
I purchased mini brands of sound ending and this is by far the heaviest sound deadening I've ever ordered. I'm not installed yet but I have a good feeling that is going to work exceptionally in blocking sound. If weight is a concern for you I would recommend a lighter product however if sound quality and a quiet ride is your priority this is the one for you.
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Reviewed in the United States on March 18, 2026
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Dustin Felton
Louisville, US
★★★★★ 5
Siless Hybrid 3-in-1 - Far Exceeded my Expectations!!!
Model: SLH20025
I recently installed the Siless Hybrid 3-in-1 sound deadening mat in my vehicle, and I’m genuinely impressed. For just $80 for 25 square feet, this product delivers performance that rivals materials costing twice as much — and with far less hassle. If you're on the fence......Just buy it! You will not be disappointed. Easy to Install: Unlike traditional sound deadening products that are stiff, sharp, and temperature-sensitive, this mat is soft, flexible, and easy to work with. I cut it cleanly with regular scissors and pressed it into tight spaces using just my fingers, so if in you don't have a roller or install tool, a good pair of scissors and your hands can get the job done. With other brands like Dynamat, the aluminum layer often leaves micro cuts on your hands and tears up your fingertips, but Siless does not due the acoustic layer being on top and above the aluminum layer that holds the butyl layer. So, it's very easy on your hands. Even in cooler temperatures (around 50°F), I had no trouble applying it but it goes on better heated. If warm outside, I would leave the entire box out in the sun for at least 30 minutes when it's warm or heats it's very pliable and easy to mold. Make sure its where you want it because once applied it's not ever falling off. and it became even more pliable and easy to mold. No heat gun, no mess — just straightforward application. I installed 40–50 square feet throughout the interior, covering everything except the headliner and the flooring forward of the rear seat. The difference in cabin noise is astonishing. I can turn my radio up concert loud with gut-punching bass, and from outside the car, it sounds like a factory sound system at mid volume. I was blown away by how well it contains sound — both inside out and outside in. My exhaust is pretty aggressive and now is barely audible from inside the cabin. While driving, it almost sounds like a stock factory setup. The Siless matting actually changed the driving experience and feels refined. If you're skeptical about sound deadening gimmicks, I get it, but this is the first product I've used and when I needed more, I went Stright to the 3 in 1 Hybrid matting and purchased it again. I love researching before buying and that's very uncommon for me to do. Note: Proper installation is key, and it does take time and patience. But if installed correctly and in the right places, it works better previously used from paint-on sound deadening to Dynamat. Update Nov, 2025 After using it this in 4 separate vehicles now. I feel the Siless’s 3 in 1 Hybrid has nailed it for best budget deadener that is better than dynamat extreme in performance and installation Protip: buy a roll of 2-3” aluminum tape and tape the seams. After trimming the edges tend to very sticky between the panels. I ran a strip of aluminum tape over the seems to create a better seal and true moisture I used it on four vehicles now and have I have not been paid to review and purchased every order myself. 3 in 1 Hybrid deadener by Siless is the best all around easy to apply sound deadner period!
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Reviewed in the United States on September 29, 2025
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Tee & Cee
Phoenix, US
★★★★★ 5
Top quality
Model: SLH20025
This Siless Hybrid 3-in-1 sound deadening mat is easy to work with and feels high-quality. The butyl material is thick and pliable, making it simple to cut and fit into doors, floors, or panels. After installation, road noise and vibrations are noticeably reduced, and it also seems to improve the overall cabin feel. No bad smell. At 25 sq ft per roll, it’s a good value for anyone looking to dampen noise and improve car acoustics. Overall, a solid, effective option for automotive soundproofing. Used on a Fiesta ST.
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Reviewed in the United States on February 15, 2026
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Andy
Waukegan, US
★★★★★ 5
Made a big improvement in cabin noise—highly recommend
Model: SLH20025
Siless Hybrid made a huge difference in reducing noise in the floor of my truck cabin. In some areas, there was basically just bare sheet metal between the inside and outside, so adding this really helped the truck feel more solid and noticeably quieter on the road. I used Kilmat on the doors, and honestly I wish I had used Siless Hybrid there too, but it was too late by the time I realized the difference. This material is very sticky, easy to cut, and simple to apply, which made the install pretty smooth. Just a heads-up: the tacky side gets messy and will bond to clothing really easily, so be careful during installation. Overall, I’d definitely buy it again—great product with real results.
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Reviewed in the United States on December 2, 2025

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