I found the 2x III offers worthwhile improvements (on my EF 500/4L IS) with sharpness at the image edges and corners, and with lower CA. That is far more true about the EF 2x TC II, however hardly true about the EF 2x TC III. Canon Extender EF 1.4x III. Have a question? It increases the focal length of a lens by a factor of 2x while still delivering superb image quality. A little more time today with the new Canon EOS Rebel T3i (Canon EOS 600D) today. SHARES. IQ with Extender 1.4x III is hardly affected. The effect is similar to what happens if you try to mount a Canon EF 1.4X extender III or EF 2X extender III on the EF 70-300 mm f/4-5.6 L IS USM. The 2x extender lost 6 f-stops with this configuration, the camera wouldn't go wider than f11 vs. f5.6 normally. Canon EF 100-400 mm f/4.5-5.6 L IS II USM Lens for Camera, Black/White £2,199.00. More info . Canon Extender EF 1.4x III vs Canon Extender EF 2x II. EF 100–400mm f/4.5–5.6L IS II + Extender EF 1.4x III; EF 200–400mm f/4L IS Extender 1.4x lens + Extender EF 2x III (built-in extender not used) If you are not using one of these combinations, you will be limited to a single central cross-type AF point. Canon Extender EF 2x III Check Price & Reviews. Goldmember. Let’s see how the Canon 1.4X Extender II compares to the new Extender III. EN PL DE. I found online that the AF speed is reduced by 75% on 2X … Stills (Canon EOS 5D Mark IV Only) Canon EOS 5D Mark IV Results. It’s tempting to compare these two combos. I am showing large resolution files to prove that Canon 300mm f2.8 L IS mark1 and Canon extender 2x mark3 at wide open aperture show some amazing results. Only 5 left in stock. Canon EF 600mm f/4L IS III USM . That would cost you only one stop, making your lenses a much more manageable f/5.6. This Canon Extender 1.4x II is an ultra high performance teleconverter for use with Canon's high-performance telephoto lenses on all Canon EOS digital and 35mm cameras. However, our information from Canon Inc. in Japan does not indicate any special optical advantage for either version of the EF Extenders when used with EF zoom lenses. Furthermore, it can take advantage of the the full array of the AF sensors at f/5.6. 3,687 posts Likes: 718 Joined Jan 2010. 3.5 out of 5 stars 56. Canon Extender EF 2x II. Categories; Brands; Versus; EN. Share on. Why is Canon EF 200-400mm F/4L IS USM Extender 1.4X better than Canon EF 600mm f/4L IS III USM? Canon Extender EF 2x II . The Fluorine coating resists soiling, smears and fingerprints. Only 6 left in stock. Comparison of Canon Extender EF 2x II and Canon Extender EF 2x III based on specifications, reviews and ratings. Nov 13, 2020 05:30 | #8. I upgraded from the 2x II to 2x III when the III first shipped. Active 8 years, 6 months ago. Note: All images taken on a tripod with no filters. Share on. For a first party teleconverter, Canon doesn’t offer any other choices. 200mm vs 600mm; 1x greater zoom range? Newest model: Canon EF Extender 1.4x III. Check other reviews and tech specs - I thought it wouldn't be as many f-stops so maybe this was something to do with the body I was using. It delivers seamless communication among camera body, lens and extender, and features coatings to minimize ghosting, flare and chromatic aberration. I’m currently shooting in the Canadian Rockies again and wildlife is all around me. 600D with 70-200+2X III Photo by C. Mcdonald. AF kicks in, compared with using the 2x II. However, Canon warns that there is an impact on autofocus performance with type II and III Extenders. I was using this with the 100-400mm IS II lens on a Rebel 4i body. 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