Canon Extender EF 1.4x II – Teleconverter Lens 

The Canon Extender EF 1.4x II, serial number 19989, is a high-quality teleconverter designed to increase the focal length of compatible Canon EF lenses by 1.4x, with minimal loss of image quality. Part of Canon’s professional L-series, it’s ideal for sports, wildlife, and nature photographers who need extra reach without carrying a larger prime or zoom lens.

It pairs best with Canon L-series telephoto lenses and maintains autofocus on most cameras when used with lenses of f/4 or brighter.

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Key Features

• Magnification: 1.4x – extends a 200mm lens to 280mm, for example

• Compatibility: Works with select Canon EF lenses, especially telephoto L-series primes and zooms (e.g., 70–200mm, 300mm, 400mm)

• Mount: Canon EF – fits between camera body and EF lens

• Optics: 7 elements in 3 groups

• Autofocus: Retains autofocus with lenses of f/4 or faster on most Canon DSLRs

• Construction: Metal body with weather sealing (when paired with weather-sealed lenses)

• Coating: Improved lens coatings over the original version for reduced flare and ghosting

• Length / Weight: Approx. 27mm / 225g

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What’s Included

• Canon Extender EF 1.4x II (Serial No. 19989)

• Front and rear caps
  

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Condition

Used – Good condition:

• Optics: Clean and clear; no scratches, haze, or fungus

• Mechanics: Mounts securely, communication with lens and camera fully functional

• Exterior: Light cosmetic wear on the barrel; no dents or impact marks