{"product_id":"canon-ef-1-4x-iii-extender","title":"Canon EF 1.4X III Extender","description":"\u003cdiv role=\"feed\" aria-label=\"Chat messages\" aria-describedby=\"_r_8p_\" aria-busy=\"false\" data-find-provider-scope=\"\"\u003e\n\u003cdiv data-sizer-excess=\"0\" data-rocksteady-sizer=\"\"\u003e\n\u003cdiv data-rs-index=\"91\" data-index=\"91\" data-last-message=\"true\"\u003e\n\u003cdiv role=\"article\" aria-setsize=\"92\" aria-posinset=\"92\" aria-label=\"Message 92 of 92\" tabindex=\"-1\"\u003e\n\u003cdiv data-test-render-count=\"1\"\u003e\n\u003cdiv class=\"group group\/message-row\"\u003e\n\u003cdiv class=\"contents\"\u003e\n\u003cdiv data-is-streaming=\"false\" class=\"group relative relative pb-[var(--msg-assistant-pb,0.75rem)]\"\u003e\n\u003cdiv class=\"font-claude-response relative leading-[1.65rem] [\u0026amp;_pre\u0026gt;div]:bg-bg-000\/50 [\u0026amp;_pre\u0026gt;div]:border-0.5 [\u0026amp;_pre\u0026gt;div]:border-border-400 [\u0026amp;_.ignore-pre-bg\u0026gt;div]:bg-transparent [\u0026amp;_.standard-markdown_:is(p,blockquote,h1,h2,h3,h4,h5,h6)]:pl-2 [\u0026amp;_.standard-markdown_:is(p,blockquote,ul,ol,h1,h2,h3,h4,h5,h6)]:pr-8 [\u0026amp;_.progressive-markdown_:is(p,blockquote,h1,h2,h3,h4,h5,h6)]:pl-2 [\u0026amp;_.progressive-markdown_:is(p,blockquote,ul,ol,h1,h2,h3,h4,h5,h6)]:pr-8\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"grid grid-rows-[auto_auto] min-w-0\"\u003e\n\u003cdiv class=\"row-start-2 col-start-1 relative grid grid-rows-[auto_auto] isolate min-w-0\"\u003e\n\u003cdiv class=\"row-start-1 col-start-1 relative z-[2] min-w-0\"\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"standard-markdown grid-cols-1 grid [\u0026amp;_\u0026gt;_*]:min-w-0 gap-3 [\u0026amp;_\u0026gt;_*:last-child]:mb-0 print:block print:[\u0026amp;_\u0026gt;_*_+_*]:mt-3 standard-markdown\"\u003e\n\u003ch2 class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eExtended Reach for Canon's L-Series Super Telephoto Lenses\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe Canon EF 1.4X III Extender is a professional-grade teleconverter designed for select Canon EF-mount L-series telephoto lenses, built for photographers who need more reach without carrying a heavier, longer telephoto lens. Extending a lens's focal length by a factor of 1.4x, it delivers phenomenal optical performance with minimal chromatic aberration, making it a perfect complement to Canon's super telephoto lineup.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eDesigned for Wildlife, Sports, and Photojournalism\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThis extender is made for photographers who need to get closer to distant and challenging subjects, from wildlife and nature photographers to sports shooters and photojournalists. It reduces the need to carry an additional heavy telephoto lens, instead offering meaningful extra reach in a compact accessory that adds almost nothing to a kit bag, weighing just 225g and measuring only 27.2mm in length. Compatible with a wide range of Canon L-series telephoto and zoom lenses, it extends focal length while reducing the effective aperture of the host lens by one stop.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eOptical Performance and Build\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe optical design consists of 7 elements in 3 groups, engineered specifically to keep chromatic aberration in check at telephoto distances, where color fringing on high-contrast edges is a persistent challenge. All optical elements feature Canon's Super Spectra coating to reduce ghosting and flare, particularly useful when shooting into bright skies or under stadium lighting, while a Fluorine coating on the front and rear elements makes marks like water spots and fingerprints easier to clean in the field. The extender features rugged, dustproof, and water-resistant construction that matches the standards of Canon's L-series lenses.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eSeamless Camera Communication\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eA built-in microcomputer maintains full communication between the camera body, lens, and extender, ensuring focusing, metering, and image data transfer smoothly without dropouts or degraded performance. When paired with the latest range of premium Canon L-series lenses, the extender enables accurate autofocus even when capturing fast-moving subjects.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eKey Features at a Glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eProduct: Canon EF 1.4X III Extender\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eMount: Canon EF (for compatible L-series telephoto lenses)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eMagnification factor: 1.4x\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLight loss: 1 stop\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eOptical design: 7 elements in 3 groups\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCoatings: Super Spectra Coating, Fluorine Coating\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBuild: dustproof and water-resistant construction\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWeight: approx. 225g\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDimensions: approx. 72.0mm x 27.2mm\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCompatibility: select Canon EF L-series super telephoto and zoom lenses\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFunctionality: full autofocus, metering, and EXIF data communication maintained\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eA Strong Choice for Extending Telephoto Reach\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe Canon EF 1.4X III Extender is a smart choice for photographers who want more telephoto reach without investing in a longer, heavier lens. Its combination of near-lossless optical quality, rugged weather-resistant build, and seamless camera communication make it a dependable addition for wildlife, sports, and photojournalism work where every extra millimeter of reach matters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv data-message-action-bar=\"\" class=\"flex justify-start ml-0.5\"\u003e\n\u003cdiv class=\"text-text-300\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Best Pricer","offers":[{"title":"Default Title","offer_id":54954234511689,"sku":"33349","price":337.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/6849\/0313\/files\/abx_fa049134-d406-4b0f-a938-5131601d3068.webp?v=1785254032","url":"https:\/\/www.bestpricer.co.uk\/products\/canon-ef-1-4x-iii-extender","provider":"Best Pricer","version":"1.0","type":"link"}