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What is the Maximum Aperture with the 1.4X III Extender
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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.
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Lenses that can be used with Extender EF1.4X III and EF2X III
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Usable lenses: Lens Focal Length & Maximum Aperture EF 1.4 X III EF 2 X 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 400mm f/5.6 EF 200mm f/2.8L II USM 280mm f/4
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Specifications for the EF1.4X III and EF2X III Extenders
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Major Specifications Lens construction: EF 1.4 X III : 7 elements in 3 groups EF2X III: 9 elements in 5 groups
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EF400mm f/5.6L USM Specifications
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EF400mm f/5.6L USM Other professional features are: a built-in lens hood with locking mechanism, dual manual focusing rings, a removable ring-type tripod mount, full-time manual focusing, and focus range selector for 3.5m to infinity or 8.5m to infinity. Extenders EF 1.4 X and EF 2 X can be used with manual focusing.
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EF180mm f/3.5L Macro USM Specifications
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A ring USM (Ultrasonic Motor) provides silent AF and full-time manual focusing. As the lens length does not change during focusing, accessories such as Macro Ring Light at the front end of the lens, can be easily operated. Maximum magnification can be increased either 1.4 X or 2 X by using Extender EF 1.4 X or EF 2 X .
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EF70-200mm f/4L USM Specifications
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EF70-200mm f/4L USM The ring USM (Ultrasonic Motor) and inner focusing system achieves high-speed silent autofocusing. Manual focusing, even while in AF mode, is possible thanks to full-time manual focusing mechanism. Extenders EF 1.4 X and 2 X can be used with this lens, and the optional Ring Tripod Mount A (W) is being marketed concurrently.
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Using Extenders with the EF 200mm f/2L IS USM lens.
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Extenders Item With EF 1.4 X II Extender With EF 2 X II Extender Focal length (mm) 280 400 Aperture
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Specifications of the MP-E 65mm f/2.8 1-5x Macro Photo
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Specifications The size and weight listed are for the lens only, except as indicated. The EF 1.4 X II/ EF 2 X II extender , the EF 12 II/ EF 25 II extension tube, and 250D/500D close-up lenses cannot be used with this lens. Aperture settings are specified on the camera.
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The difference between the current Canon EF Extenders, EF 1.4x III and the EF 1.4x II
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The difference between the current Canon EF Extenders , EF 1.4x II and the EF 2x II, and the previous versions.
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What lenses are compatible with the EF 1.4x III and EF 2x III extenders?
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Please see the following chart for lens compatibility with the EF 1.4x III and EF 2x III extenders .
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