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CMS-XML Lenses that can be used with Extender EF1.4X III and EF2X III
Usable lenses: Lens Focal Length & Maximum Aperture EF1.4X III EF2X III EF 135mm f/2L USM 189mm f/2.8 270mm f/4 EF 180mm f/3.5L Macro USM 252mm f/4.5 360mm f/6.7 EF 200mm f/2.8L USM 280mm f/ 4 400 mm f /5.6 EF 200mm f /2.8 L II USM 280 mm f /4
CMS-XML The difference between the current Canon EF Extenders, EF 1.4x III and the EF 1.4x II
The difference between the current Canon EF Extenders, EF 1.4 x II and the EF 2x II, and the previous versions.
CMS-XML What is the Maximum Aperture with the 1.4X III Extender
When the EF 1.4 x III is attached, the lens maximum aperture will be smaller (darker) by 1 stop. The camera will compensate the exposure automatically.
CMS-XML What is the Maximum Aperture with the EF 2x III Extender
When the EF 1.4 x II is attached, the lens maximum aperture will be smaller (darker) by 1 stop. The camera will compensate the exposure automatically.
CMS-XML Lens Specifications with the Extender EF 1.4x II/III or EF 2x II/III
Lens Specifications with the Extender EF 1.4 x II/III or EF 2x II/III
CMS-XML Specifications for the EF1.4X III and EF2X III Extenders
Major Specifications EF1.4X III: 72.0 dia. x 27.2 mm / 2.8 x 1.1 inch
CMS-XML How to mount and dismount the EF 2x III Extender
CMS-XML EF 2x III Extender : What are the parts and controls - nomenclature?