{"product_id":"canon-2x-iii","title":"Canon 2x III - 1897","description":"\u003ch2\u003eCanon 2x III - 1897\u003c\/h2\u003e\n\u003cp\u003eDesigned to extend a lenses focal length by a factor of 2x, the Canon Extender EF 2X III delivers optical performance on par with the finest Canon super telephoto lenses. It delivers seamless communication among camera body, lens and extender, and features coatings to minimize ghosting, flare and chromatic aberration. The Fluorine coating resists soiling, smears and fingerprints. Extender EF 2X III meets all necessary standards in terms of rugged, dustproof and water-resistant construction, and should be in every professional's camera bag.\u003c\/p\u003e\n\u003ch5\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"1myvuv1\" data-start=\"27\" data-end=\"169\"\u003e\n\u003cstrong data-start=\"29\" data-end=\"64\"\u003eTeleconverter performance boost\u003c\/strong\u003e — \u003cstrong data-start=\"67\" data-end=\"77\"\u003e2× III\u003c\/strong\u003e doubles your lens’s focal length (e.g., 300 mm → 600 mm) while maintaining image quality.\u003c\/li\u003e\n\u003cli data-section-id=\"gcav2h\" data-start=\"170\" data-end=\"293\"\u003e\n\u003cstrong data-start=\"172\" data-end=\"200\"\u003eExcellent optical design\u003c\/strong\u003e with minimal impact on sharpness and contrast when paired with compatible L‑series primes.\u003c\/li\u003e\n\u003cli data-section-id=\"17awphb\" data-start=\"294\" data-end=\"392\"\u003e\n\u003cstrong data-start=\"296\" data-end=\"326\"\u003eFast \u0026amp; accurate AF support\u003c\/strong\u003e with USM\/STM lenses that retain reliable autofocus performance.\u003c\/li\u003e\n\u003cli data-section-id=\"7w24hs\" data-start=\"393\" data-end=\"470\"\u003e\n\u003cstrong data-start=\"395\" data-end=\"419\"\u003eRobust build quality\u003c\/strong\u003e with weather sealing for professional field use.\u003c\/li\u003e\n\u003cli data-section-id=\"15y8h2e\" data-start=\"471\" data-end=\"572\"\u003e\n\u003cstrong data-start=\"473\" data-end=\"523\"\u003eIdeal for wildlife, sports, and distant action\u003c\/strong\u003e — extends reach without carrying extra lenses.\u003c\/li\u003e\n\u003cli data-section-id=\"1rdq3v0\" data-start=\"573\" data-end=\"666\"\u003e\n\u003cstrong data-start=\"575\" data-end=\"599\"\u003eLight loss trade‑off\u003c\/strong\u003e (approx. 2 stops) — plan exposure and stabilization accordingly.\u003c\/li\u003e\n\u003cli data-section-id=\"17lzpu5\" data-start=\"667\" data-end=\"756\"\u003e\n\u003cstrong data-start=\"669\" data-end=\"715\"\u003eBest paired with fast, high‑quality lenses\u003c\/strong\u003e (f\/2.8–f\/4 range) for optimal results.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\n\u003cbr\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cp data-start=\"84\" data-end=\"300\"\u003e\u003cstrong data-start=\"84\" data-end=\"117\"\u003eQ1: What is the Canon 2x III?\u003c\/strong\u003e\u003cbr data-start=\"117\" data-end=\"120\"\u003eA: It’s a \u003cstrong data-start=\"130\" data-end=\"159\"\u003e2x teleconverter\/extender\u003c\/strong\u003e that doubles the effective focal length of compatible Canon EF lenses (e.g., a 400 mm becomes 800 mm). \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"302\" data-end=\"514\"\u003e\u003cstrong data-start=\"302\" data-end=\"338\"\u003eQ2: How does it affect aperture?\u003c\/strong\u003e\u003cbr data-start=\"338\" data-end=\"341\"\u003eA: Attaching it reduces the lens’s maximum aperture by \u003cstrong data-start=\"396\" data-end=\"409\"\u003e2 f‑stops\u003c\/strong\u003e (slower light transmission), which impacts autofocus and exposure. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"516\" data-end=\"727\"\u003e\u003cstrong data-start=\"516\" data-end=\"560\"\u003eQ3: Does it communicate with the camera?\u003c\/strong\u003e\u003cbr data-start=\"560\" data-end=\"563\"\u003eA: Yes — a \u003cstrong data-start=\"574\" data-end=\"601\"\u003ebuilt‑in microprocessor\u003c\/strong\u003e maintains seamless data communication (AF, metering, EXIF) between the camera and lens. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"729\" data-end=\"950\"\u003e\u003cstrong data-start=\"729\" data-end=\"763\"\u003eQ4: Is the build quality good?\u003c\/strong\u003e\u003cbr data-start=\"763\" data-end=\"766\"\u003eA: It features \u003cstrong data-start=\"781\" data-end=\"820\"\u003erugged, weather‑sealed construction\u003c\/strong\u003e and Canon coatings (including fluorine) to resist dust, moisture, smears, and fingerprints. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"952\" data-end=\"1121\"\u003e\u003cstrong data-start=\"952\" data-end=\"984\"\u003eQ5: How big and heavy is it?\u003c\/strong\u003e\u003cbr data-start=\"984\" data-end=\"987\"\u003eA: Compact and lightweight for a teleconverter — roughly \u003cstrong data-start=\"1044\" data-end=\"1082\"\u003e72 mm diameter, 53 mm long, ~325 g\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1123\" data-end=\"1405\"\u003e\u003cstrong data-start=\"1123\" data-end=\"1165\"\u003eQ6: What lenses is it compatible with?\u003c\/strong\u003e\u003cbr data-start=\"1165\" data-end=\"1168\"\u003eA: Works with many \u003cstrong data-start=\"1187\" data-end=\"1225\"\u003eCanon EF L‑series telephoto lenses\u003c\/strong\u003e (typically 135 mm+ and select 70‑200 mm \u0026amp; 100‑400 mm lenses). It isn’t compatible with all EF lenses, especially short zooms or non‑L optics. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1407\" data-end=\"1595\"\u003e\u003cstrong data-start=\"1407\" data-end=\"1457\"\u003eQ7: Does it work with mirrorless Canon bodies?\u003c\/strong\u003e\u003cbr data-start=\"1457\" data-end=\"1460\"\u003eA: Yes — when used with an \u003cstrong data-start=\"1487\" data-end=\"1507\"\u003eEF‑to‑RF adapter\u003c\/strong\u003e, it can mount on RF‑mount mirrorless cameras too. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1597\" data-end=\"1837\"\u003e\u003cstrong data-start=\"1597\" data-end=\"1634\"\u003eQ8: How does it affect autofocus?\u003c\/strong\u003e\u003cbr data-start=\"1634\" data-end=\"1637\"\u003eA: Because of the effective aperture drop, AF performance may be limited (especially at narrower stops). Body\/lens combinations influence how many AF points work. \u003cspan class=\"\" data-state=\"delayed-open\" aria-describedby=\"radix-_r_kd_\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5\u003e\n\u003cbr\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cdiv class=\"flex flex-col text-sm pb-25\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:24b48ce8-ef80-482f-be1b-ede769e7ea15-18\" data-testid=\"conversation-turn-38\" data-scroll-anchor=\"true\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"35598478-1e8e-4821-a14f-b9362ab63097\" dir=\"auto\" data-message-model-slug=\"gpt-5-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"\u003e\n\u003cul data-start=\"48\" data-end=\"688\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"19lv6rh\" data-start=\"48\" data-end=\"140\"\u003e\n\u003cstrong data-start=\"50\" data-end=\"72\"\u003eKeep optics clean:\u003c\/strong\u003e Use a blower and microfiber cloth; avoid touching glass directly.\u003c\/li\u003e\n\u003cli data-section-id=\"1w1du8f\" data-start=\"141\" data-end=\"226\"\u003e\n\u003cstrong data-start=\"143\" data-end=\"177\"\u003eProtect from dust \u0026amp; scratches:\u003c\/strong\u003e Always attach front\/rear caps when not in use.\u003c\/li\u003e\n\u003cli data-section-id=\"4zetkw\" data-start=\"227\" data-end=\"323\"\u003e\n\u003cstrong data-start=\"229\" data-end=\"246\"\u003eStore safely:\u003c\/strong\u003e Keep in a dry, padded case with silica gel to prevent moisture and fungus.\u003c\/li\u003e\n\u003cli data-section-id=\"dz18ya\" data-start=\"324\" data-end=\"422\"\u003e\n\u003cstrong data-start=\"326\" data-end=\"344\"\u003eHandle gently:\u003c\/strong\u003e Align carefully when mounting to avoid damage to contacts or lens surfaces.\u003c\/li\u003e\n\u003cli data-section-id=\"r1h0rq\" data-start=\"423\" data-end=\"501\"\u003e\n\u003cstrong data-start=\"425\" data-end=\"454\"\u003eAvoid extreme conditions:\u003c\/strong\u003e Protect from rain, dust, heat, and humidity.\u003c\/li\u003e\n\u003cli data-section-id=\"rmlqv9\" data-start=\"502\" data-end=\"599\"\u003e\n\u003cstrong data-start=\"504\" data-end=\"529\"\u003eInspect periodically:\u003c\/strong\u003e Check optical surfaces and mechanical connections for dust or wear.\u003c\/li\u003e\n\u003cli data-section-id=\"iwnls\" data-start=\"600\" data-end=\"688\" data-is-last-node=\"\"\u003e\n\u003cstrong data-start=\"602\" data-end=\"625\"\u003eTransport securely:\u003c\/strong\u003e Use a dedicated pouch or compartment to prevent impact damage.\u003c\/li\u003e\n\u003c\/ul\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\/section\u003e\n\u003c\/div\u003e","brand":"Canon","offers":[{"title":"Default Title","offer_id":46395454652566,"sku":"1897","price":321.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/3128\/3350\/files\/1897-00.jpg?v=1779693609","url":"https:\/\/paw-counter.com\/products\/canon-2x-iii","provider":"Move Better Every Day","version":"1.0","type":"link"}