Canon Extender EF 2x II (Pre-Owned)

The Canon Extender EF 2x II is a professional teleconverter designed to double the focal length of compatible Canon EF lenses while maintaining exceptional optical performance. It effectively transforms a 200 mm lens into a 400 mm lens, or a 300 mm into a 600 mm, making it ideal for wildlife, sports, and distant photography where extra reach is needed.

Key Features

• Magnification: 2× (doubles focal length)

• Mount type: Canon EF

• Optical construction: 7 elements in 5 groups

• Aperture reduction: 2 stops (for example, f/2.8 becomes f/5.6)

• Dimensions: 71.8 mm (diameter) × 57.9 mm (length)

• Weight: approximately 265 g

• Weather-sealed when used with compatible Canon L-series lenses and camera bodies

• Maintains electronic communication between lens and camera for exposure and metering

Performance and Compatibility
The Extender EF 2x II works best with Canon’s professional telephoto lenses such as the 70-200 mm f/2.8L, 300 mm f/2.8L, and 400 mm f/2.8L. Because it reduces the maximum aperture by two stops, autofocus may be slower or may not function on some camera bodies when the resulting aperture is f/8 or narrower. Image stabilization continues to operate if supported by the attached lens.

Ideal For
Photographers who need extended reach without investing in a new super-telephoto lens. It’s perfect for nature, sports, and outdoor photography, where distance subjects are common.

Important Note
Using the extender with lower-aperture lenses may reduce image brightness and autofocus performance. It is recommended for use with high-quality Canon L-series optics for best results.