{"product_id":"canon-ef-17-40mm-f-4l-usm","title":"Canon EF 17-40mm f\/4L USM Ultra-Wide Zoom Lens – L-Series EF Mount Lens for Canon DSLR Cameras","description":"\u003cp\u003eOverview\u003c\/p\u003e\n\u003cp\u003eCapture dramatic landscapes, architecture, interiors and travel scenes with the \u003cstrong data-start=\"648\" data-end=\"677\"\u003eCanon EF 17-40mm f\/4L USM\u003c\/strong\u003e. Designed as a professional L-Series ultra-wide zoom lens, it gives photographers flexible wide-angle framing, dependable autofocus and premium Canon optical quality in a compact, lightweight body.\u003c\/p\u003e\n\u003cp\u003eWhether you are shooting expansive outdoor scenes, property interiors, city streets or creative wide-angle portraits, this lens helps you fit more into the frame while keeping your setup practical and portable.\u003c\/p\u003e\n\u003cp\u003eKey Features \u0026amp; Benefits\u003c\/p\u003e\n\u003cul data-start=\"1119\" data-end=\"3146\"\u003e\n\u003cli data-section-id=\"1ps2tqb\" data-start=\"1119\" data-end=\"1336\"\u003e\n\u003cstrong data-start=\"1121\" data-end=\"1175\"\u003eCapture More of the Scene with Ultra-Wide Coverage\u003c\/strong\u003eThe \u003cstrong data-start=\"1184\" data-end=\"1207\"\u003e17-40mm focal range\u003c\/strong\u003e gives you the flexibility to shoot sweeping landscapes, buildings, interiors and group shots without constantly changing lenses.\u003c\/li\u003e\n\u003cli data-section-id=\"ccrc1g\" data-start=\"1338\" data-end=\"1595\"\u003e\n\u003cstrong data-start=\"1340\" data-end=\"1392\"\u003eConsistent Exposure with a Constant f\/4 Aperture\u003c\/strong\u003eThe constant \u003cstrong data-start=\"1410\" data-end=\"1434\"\u003ef\/4 maximum aperture\u003c\/strong\u003e keeps exposure consistent throughout the zoom range, making it easier to shoot confidently when reframing or moving between wide and standard-wide compositions.\u003c\/li\u003e\n\u003cli data-section-id=\"1w3gnky\" data-start=\"1597\" data-end=\"1857\"\u003e\n\u003cstrong data-start=\"1599\" data-end=\"1638\"\u003eProfessional L-Series Image Quality\u003c\/strong\u003eAs part of Canon’s respected \u003cstrong data-start=\"1672\" data-end=\"1684\"\u003eL-Series\u003c\/strong\u003e lens range, the EF 17-40mm f\/4L USM is designed for photographers who want strong optical performance, dependable build quality and a more professional shooting experience.\u003c\/li\u003e\n\u003cli data-section-id=\"1bptz9i\" data-start=\"1859\" data-end=\"2139\"\u003e\n\u003cstrong data-start=\"1861\" data-end=\"1904\"\u003eFast, Quiet Focusing with USM Autofocus\u003c\/strong\u003eThe \u003cstrong data-start=\"1913\" data-end=\"1950\"\u003eUltrasonic Motor autofocus system\u003c\/strong\u003e helps deliver quick, quiet focusing, making it useful for travel, events, documentary work and everyday photography where speed and discretion matter. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"y6tg1l\" data-start=\"2141\" data-end=\"2387\"\u003e\n\u003cstrong data-start=\"2143\" data-end=\"2178\"\u003eCreative Close-Up Possibilities\u003c\/strong\u003eA \u003cstrong data-start=\"2185\" data-end=\"2220\"\u003e0.28m closest focusing distance\u003c\/strong\u003e lets you get closer to foreground subjects, helping create dramatic wide-angle compositions with stronger depth and perspective. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"btoj9w\" data-start=\"2389\" data-end=\"2645\"\u003e\n\u003cstrong data-start=\"2391\" data-end=\"2442\"\u003eLightweight Design for Travel and Location Work\u003c\/strong\u003eAt approximately \u003cstrong data-start=\"2464\" data-end=\"2472\"\u003e500g\u003c\/strong\u003e, this lens is easy to carry for long shoots, city walks, travel photography and landscape trips where every bit of kit weight matters. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"19ds1a8\" data-start=\"2647\" data-end=\"2913\"\u003e\n\u003cstrong data-start=\"2649\" data-end=\"2692\"\u003e77mm Filter Thread for Creative Control\u003c\/strong\u003eThe \u003cstrong data-start=\"2701\" data-end=\"2725\"\u003e77mm filter diameter\u003c\/strong\u003e makes it compatible with a wide range of professional filters, useful for landscape photographers using ND filters, polarisers or protective filters. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"10uisja\" data-start=\"2915\" data-end=\"3146\"\u003e\n\u003cstrong data-start=\"2917\" data-end=\"2951\"\u003eFull-Time Manual Focus Control\u003c\/strong\u003eMechanical full-time manual focusing allows quick fine-tuning after autofocus, giving photographers more control when working with precise compositions. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhy Choose This Product\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong data-start=\"3181\" data-end=\"3210\"\u003eCanon EF 17-40mm f\/4L USM\u003c\/strong\u003e is a smart choice for photographers who want a dependable ultra-wide zoom without carrying an oversized lens. It delivers the flexibility needed for landscapes, architecture, interiors and travel, while the L-Series build and USM autofocus make it feel confident and professional in real-world use. For Canon shooters who want wider, more dramatic images with reliable handling, this lens is a practical and proven creative upgrade.\u003c\/p\u003e\n\u003cp\u003eSpecifications Table\u003c\/p\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"3672\" data-end=\"4625\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"3672\" data-end=\"3699\"\u003e\n\u003ctr data-start=\"3672\" data-end=\"3699\"\u003e\n\u003cth data-start=\"3672\" data-end=\"3688\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"3688\" data-end=\"3699\" data-col-size=\"lg\" class=\"last:pe-10\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"3710\" data-end=\"4625\"\u003e\n\u003ctr data-start=\"3710\" data-end=\"3727\"\u003e\n\u003ctd data-start=\"3710\" data-end=\"3718\" data-col-size=\"sm\"\u003eBrand\u003c\/td\u003e\n\u003ctd data-col-size=\"lg\" data-start=\"3718\" data-end=\"3727\"\u003eCanon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3728\" data-end=\"3767\"\u003e\n\u003ctd data-start=\"3728\" data-end=\"3743\" data-col-size=\"sm\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd data-start=\"3743\" data-end=\"3767\" data-col-size=\"lg\"\u003eUltra-Wide Zoom Lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3768\" data-end=\"3805\"\u003e\n\u003ctd data-start=\"3768\" data-end=\"3776\" data-col-size=\"sm\"\u003eModel\u003c\/td\u003e\n\u003ctd data-col-size=\"lg\" data-start=\"3776\" data-end=\"3805\"\u003eCanon EF 17-40mm f\/4L USM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3806\" data-end=\"3831\"\u003e\n\u003ctd data-start=\"3806\" data-end=\"3819\" data-col-size=\"sm\"\u003eLens Mount\u003c\/td\u003e\n\u003ctd data-col-size=\"lg\" data-start=\"3819\" data-end=\"3831\"\u003eCanon EF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3832\" data-end=\"3926\"\u003e\n\u003ctd data-start=\"3832\" data-end=\"3848\" data-col-size=\"sm\"\u003eCamera Format\u003c\/td\u003e\n\u003ctd data-col-size=\"lg\" data-start=\"3848\" data-end=\"3926\"\u003eFull-frame compatible; also works with compatible Canon APS-C DSLR cameras\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3927\" data-end=\"3953\"\u003e\n\u003ctd data-start=\"3927\" data-end=\"3942\" data-col-size=\"sm\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd data-col-size=\"lg\" data-start=\"3942\" data-end=\"3953\"\u003e17-40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3954\" data-end=\"3980\"\u003e\n\u003ctd data-start=\"3954\" data-end=\"3973\" data-col-size=\"sm\"\u003eMaximum Aperture\u003c\/td\u003e\n\u003ctd data-col-size=\"lg\" data-start=\"3973\" data-end=\"3980\"\u003ef\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3981\" data-end=\"4008\"\u003e\n\u003ctd data-start=\"3981\" data-end=\"4000\" data-col-size=\"sm\"\u003eMinimum Aperture\u003c\/td\u003e\n\u003ctd data-start=\"4000\" data-end=\"4008\" data-col-size=\"lg\"\u003ef\/22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4009\" data-end=\"4056\"\u003e\n\u003ctd data-start=\"4009\" data-end=\"4029\" data-col-size=\"sm\"\u003eLens Construction\u003c\/td\u003e\n\u003ctd data-col-size=\"lg\" data-start=\"4029\" data-end=\"4056\"\u003e12 elements in 9 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4057\" data-end=\"4081\"\u003e\n\u003ctd data-start=\"4057\" data-end=\"4076\" data-col-size=\"sm\"\u003eDiaphragm Blades\u003c\/td\u003e\n\u003ctd data-start=\"4076\" data-end=\"4081\" data-col-size=\"lg\"\u003e7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4082\" data-end=\"4125\"\u003e\n\u003ctd data-start=\"4082\" data-end=\"4100\" data-col-size=\"sm\"\u003eAutofocus Motor\u003c\/td\u003e\n\u003ctd data-start=\"4100\" data-end=\"4125\" data-col-size=\"lg\"\u003eUSM, Ultrasonic Motor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4126\" data-end=\"4163\"\u003e\n\u003ctd data-start=\"4126\" data-end=\"4154\" data-col-size=\"sm\"\u003eClosest Focusing Distance\u003c\/td\u003e\n\u003ctd data-start=\"4154\" data-end=\"4163\" data-col-size=\"lg\"\u003e0.28m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4164\" data-end=\"4205\"\u003e\n\u003ctd data-start=\"4164\" data-end=\"4188\" data-col-size=\"sm\"\u003eMaximum Magnification\u003c\/td\u003e\n\u003ctd data-col-size=\"lg\" data-start=\"4188\" data-end=\"4205\"\u003e0.24x at 35mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4206\" data-end=\"4232\"\u003e\n\u003ctd data-start=\"4206\" data-end=\"4224\" data-col-size=\"sm\"\u003eFilter Diameter\u003c\/td\u003e\n\u003ctd data-start=\"4224\" data-end=\"4232\" data-col-size=\"lg\"\u003e77mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4233\" data-end=\"4272\"\u003e\n\u003ctd data-start=\"4233\" data-end=\"4245\" data-col-size=\"sm\"\u003eLens Hood\u003c\/td\u003e\n\u003ctd data-start=\"4245\" data-end=\"4272\" data-col-size=\"lg\"\u003eCanon EW-83E compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4273\" data-end=\"4311\"\u003e\n\u003ctd data-start=\"4273\" data-end=\"4286\" data-col-size=\"sm\"\u003eDimensions\u003c\/td\u003e\n\u003ctd data-start=\"4286\" data-end=\"4311\" data-col-size=\"lg\"\u003eApprox. 83.5 x 96.8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4312\" data-end=\"4337\"\u003e\n\u003ctd data-start=\"4312\" data-end=\"4321\" data-col-size=\"sm\"\u003eWeight\u003c\/td\u003e\n\u003ctd data-col-size=\"lg\" data-start=\"4321\" data-end=\"4337\"\u003eApprox. 500g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4338\" data-end=\"4356\"\u003e\n\u003ctd data-start=\"4338\" data-end=\"4347\" data-col-size=\"sm\"\u003eColour\u003c\/td\u003e\n\u003ctd data-col-size=\"lg\" data-start=\"4347\" data-end=\"4356\"\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4357\" data-end=\"4495\"\u003e\n\u003ctd data-start=\"4357\" data-end=\"4373\" data-col-size=\"sm\"\u003eCompatibility\u003c\/td\u003e\n\u003ctd data-col-size=\"lg\" data-start=\"4373\" data-end=\"4495\"\u003eCanon EF-mount DSLR cameras; compatible with Canon EOS R mirrorless cameras when used with a suitable EF-EOS R adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4496\" data-end=\"4518\"\u003e\n\u003ctd data-start=\"4496\" data-end=\"4502\" data-col-size=\"sm\"\u003eEAN\u003c\/td\u003e\n\u003ctd data-start=\"4502\" data-end=\"4518\" data-col-size=\"lg\"\u003eNot supplied\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4519\" data-end=\"4625\"\u003e\n\u003ctd data-start=\"4519\" data-end=\"4541\" data-col-size=\"sm\"\u003eWhat you’ll receive\u003c\/td\u003e\n\u003ctd data-col-size=\"lg\" data-start=\"4541\" data-end=\"4625\"\u003eCanon EF 17-40mm f\/4L USM lens; supplied accessories may vary by package\/listing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Cashtro Ltd","offers":[{"title":"New","offer_id":56921937609082,"sku":"ATEF 17-40mm","price":699.99,"currency_code":"GBP","in_stock":false},{"title":"Used - Like New","offer_id":56921937641850,"sku":"ATEF 17-40mm","price":599.99,"currency_code":"GBP","in_stock":false},{"title":"Used - Very Good","offer_id":56921937674618,"sku":"ATEF 17-40mm","price":500.0,"currency_code":"GBP","in_stock":false},{"title":"Used - Good","offer_id":56921937707386,"sku":"ATEF 17-40mm","price":199.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0650\/9127\/2952\/files\/6526b682e719a624d41b5e41_3322351_1779630732232.png?v=1779702699","url":"https:\/\/www.gadcet.com\/products\/canon-ef-17-40mm-f-4l-usm","provider":"Gadcet UK","version":"1.0","type":"link"}