Canon Extender EF 1.4x III

{"overview":"The Canon Extender EF 1.4x III is a teleconverter for the Canon EF autofocus mount, multiplying the focal length of compatible EF telephoto and super-telephoto lenses by 1.4x at the cost of one stop of light. These are wholesale saleroom results rather than dealer retail, so what a clean copy sells for at auction today typically lands below what the same unit is worth on the used dealer shelf; condition of the rear protruding element and contact pins is the main swing factor on value and price.","buying_guide":"Inspect the front and rear elements carefully for fungus, haze and coating scratches, paying particular attention to the protruding rear group which is exposed and easily marked.

Generated summary, 29 Apr 2026 — not checked by hand; prices on this page come from the sales, not from this text.