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Specifications for the EF1.4X III and EF2X III Extenders

Please see the dimensions, weights, and other specifications for the EF 1.4X III and EF2X III Extenders.

EF1.4x II Extender : What are the parts and controls - nomenclature?

EF 1.4x II Extender : What are the parts and controls - nomenclature?

Lenses that can be used with Extender EF1.4X III and EF2X III

These lenses can be used with either the Extender EF 1.4X III or the EF2X III.

What lenses are compatible with the EF 1.4x III and EF 2x III extenders?

Please see the following chart for lens compatibility with the EF 1.4x III and EF 2x III extenders.

Specifications for the EF 200-400mm f/4L IS USM Extender 1.4x lens

Lens Specifications with the Extender EF 1.4x II/III or EF 2x II/III

Attaching the strap on the EF 200-400mm f/4L IS USM Extender 1.4x

What is the Maximum Aperture with the 1.4X III Extender

When the EF 1.4x III is attached, the lens maximum aperture will be smaller (darker) by 1 stop. The camera will compensate the exposure automatically.

Setting the Focus Mode on the EF 200-400mm f4L IS USM Extender 1.4x lens