Re: Canon Extender EF 2X II & Canon EF-S 18-200mm 1:3.5-5.6 IS In reply to Quijibo69 • Oct 14, 2008 If the aim is to get up to 400mm without spending big money you might be better off looking at third party lenses. 14 Jul 2012. #1. Maker/Provider: Canon. Product: Extender EF 2x III. Price: Around £400. Overall Rating: 8/10. Overall Summary: An effective way of doubling the focal length of a compatible lens, with the penalty of reducing the maximum aperture by 2 stops. Detailed Review. Canon Extender EF 2x III: 12/2010: 5: 9: 72.0x 52.7: 325g: The world's number 1 Canon Review website with every Canon EF Lens. Read all of the reviews, see over 1 year ago. Results with the Extender 2x III are overall slightly sharper than the Extender 2x II with a difference being most noticeable in the mid-frame and corner areas. The 2x II added pincushion distortion to the lens it was used with whereas the 2x version III adds slight barrel distortion.Feb 3, 2011. A few things may not work as you expect, however. First, you can’t use the extender with all your lenses. As of this writing, you can only use it with six Canon RF lenses: the RF100–500mm F4.5–7.1 L IS USM, the RF100–400mm F5.6–8 IS USM, the RF600mm F11 IS STM, the RF800mm F11 IS STM, the RF400mm F2.8 L IS, and the RF600mm F4 L IS. Canon EF 100-400mmL II + EF 2x III Extender on the Canon EOS R6 camera. The EF 1.4x III and EF 2x III Extenders were redesigned "from the ground up" according to Canon. They're stronger internally and have more screws holding them together. The microprocessor inside has been updated as well as the coatings on the glass elements. Re: EOS R6 + EF 2x III Extender / 800mm (PICS) In reply to Marco Nero • May 5, 2021 This was my first torture test with the R6 after I got it. Extender EF 1.4x III compatible with EF mount? in Camera Accessories 12-18-2023; 600/800MM lenses vs RF 2x Extender for Kenya Safari in EF & RF Lenses 12-06-2023; Extender EF 1.4x compatibility with Mount Adapter EF-EOS R in Camera Accessories 12-05-2023 Estimated reading time: 07 minutes and a half. January/2015 - The EF Extender 2X III is a teleconverter that mounts between you camera and your EF compatible lens to effectively multiply its focal length by two. It does that simply enlarging 25% of the middle of your frame, discarding most of the light; thus reducing two stops of exposure (a f Canon EF 100-400mm f/4.5-5.6L IS USM Canon EOS 5D Mark III Canon Extender EF 2x III If you believe there are incorrect tags, please send us this post using our feedback form . 5WlQs5.