This reviewer received promo considerations or sweepstakes entry for writing a review. The Canon 1.4x teleconverter can help create excellent photos. Slight loss of maximum f/stop but also can obtain greater DOF (depth of field) at smallest f.stop. Keep lens surfaces clean or dust spot in photos. The overall results of this test show that there is little benefit in using the 1.4x III extender on the Canon 100-400mm f4.5-5.6 L IS USM, as cropping down the images obtained with the lens minus the extender, actually gives better results - at least with the Canon 7D Mk II, which has dual DIGIC 6 processors, 20.2MP and a decent CMOS sensor. Key Features. EF-Mount Lens/Full-Frame Format. Aperture Range: f/5 to f/22. One FLD Element, Three SLD Elements. Super Multi-Layer Coating. Show More. Offering an impressively versatile range with a portable form factor, the Canon EF-mount 150-600mm f/5-6.3 DG OS HSM from Sigma is a Contemporary-series telephoto zoom characterized by its Sorry for replying so late, but thank you everyone for your responses. Been kinda busy lately. I just purchased the 1.4x III extender to go along with my new 5D Mark IV and have been testing it out. So far I really like the combination of the 5D Mark IV + the 1.4x III extender and the 100-400 F4.5-5.6 IS II L lens. Canon EF 70-200mm F2.8L IS II USM Canon EF 16-35mm F4L IS USM Canon EF 100-400mm F4.5-5.6L IS II Sony a7R III Canon EOS R5 +6 more Canon EF 100-400mm F4.5-5.6L IS II Canon EOS 5D If you believe there are incorrect tags, please send us this post using our feedback form . A lens extender is an adapter lens that fits between the camera body and the lens and extends the focal length of the lens. While maintaining the lens’s high optical performance, the Extender EF1.4X II increases the focal length by 1.4 times and Extender EF2X II doubles the focal length. Both Canon extenders feature the same exceptional Extender EF 1.4x III compatible with EF mount? in Camera Accessories 12-18-2023; EOS Rebel T7 Adapter needed for older telephoto lenses in Camera Accessories 12-14-2023; New RF 200-800mm f/6.3-9 IS USM telephoto lens availability in EF & RF Lenses 12-14-2023; EOS Rebel T6 Extender and Lens Recommendations in EF & RF Lenses 12-10-2023 Like all 2× teleconverters, it doubles the lens' focal length, at the expense of losing two stops of speed (doubling the f/number). The RF 100-500mm f/4.5-7.1 L IS becomes a 600-1,000mm f/11-14 L IS (oddly it only works with the 100-500 set from 300-500mm). The RF 600mm f/11 IS becomes a 1,200mm f/22 IS. The RF 800mm f/11 IS becomes a 1,600mm .

canon extender ef 1.4 x iii lens compatibility