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Black cylindrical teleconverter with red ring, front and rear caps, lens case, cap keeper and cleaning cloths

Canon

Canon Extender EF 2X III (4410B002) + Cap Keeper + Cleaning Kit

SKU CH-81AD-H998C

Doubles focal length on select Canon EF L-series telephoto lenses with nine-element optics and fluorine coating, plus cap keeper and cleaning kit included

  • CompatibilityDSLR Camera
  • Doubles focal length with 2x magnification factor
  • Nine optical elements in five groups for optical performance
  • Super Spectra coating reduces ghosting and flare
  • Fluorine coating eases cleaning of front and rear elements
  • Bundle includes cap keeper and cleaning kit for protection

Extender EF 2X III for L-Series Telephoto

The Canon Extender EF 2X III doubles the focal length of compatible EF-mount L-series telephoto lenses. It uses nine optical elements in five groups with Super Spectra coating to reduce ghosting and flare. A fluorine coating on the front and rear elements simplifies cleaning of water spots and fingerprints. The bundle adds a lens cap keeper and a cleaning kit for maintenance.

Compatibility Check for EF Mount L-Series

Verify that your telephoto lens is a Canon EF-mount L-series model supported by this extender. The extender fits between the camera body and the lens, maintaining data communication for autofocus and exposure metering. Ensure your camera body uses the EF mount system. The included case LP811 provides storage for the extender unit.

Replaces Need for Longer Native Lenses

This 2.0x magnification factor lets photographers reach distant subjects without purchasing a longer native super-telephoto lens. It is suited for wildlife, nature, sports and photojournalism where carrying heavy glass is impractical. The jump is worth it when you need extended reach on existing L-series glass and accept the two-stop light loss inherent to a 2x converter.

Highlights

  • Doubles focal length with 2x magnification factor
  • Nine optical elements in five groups for optical performance
  • Super Spectra coating reduces ghosting and flare
  • Fluorine coating eases cleaning of front and rear elements
  • Bundle includes cap keeper and cleaning kit for protection

Specifications

BrandCanon
CompatibilityDSLR Camera

Questions about this item

What comes in the bundle and do I need to buy any caps or a case separately?

The bundle includes the Extender EF 2X III, a lens cap keeper and a cleaning kit. The manufacturer also supplies a front cap for EF 1.4x and 2x extenders, a rear dust cap and the LP811 lens case, so no extra caps or case are required.

Should I choose the 1.4x or 2.0x version for my L-series telephoto lens?

This item is the 2.0x extender; it doubles the focal length of compatible L-series EF telephoto lenses. If you need a smaller 1.4x magnification increase, you would select a different model.

How does the 2x magnification factor affect aperture and autofocus on my camera?

The 2x factor reduces the effective aperture by two stops and the microcomputer maintains data communication between lens and camera, preserving autofocus function on bodies that support f/8 focusing.

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