Home / Lenses / CANON / Ultra-Wide Lens / Canon EF 17-40mm f/4.0L USM Canon EF 17-40mm f/4.0L USM £459.00 The Canon 17-40mm f4 USM is a new and affordable L-series ultra-wide-angle zoom lens that's ideal for both film and digital SLRs. Add to your Wish List Information 1 YEAR WARRANTY INCLUDED The EF 17-40mm f/4L USM Lens from Canon is a high quality "L" series wide angle zoom lens for full frame and APS-C size DSLR cameras. It combines one high-precision molded glass aspherical element and two replica aspherical lenses to achieve the extended zoom range, while also correcting for common aberrations that arise during zooming. A Super UD (Ultra-low Dispersion) glass element minimizes the chromatic aberration of magnification which tends to occur with wide-angle lenses, to help eliminate color bleed along the edges of the subject and achieve high image contrast and resolution. The lens' minimum focusing distance is just 11" (28cm) throughout its entire range of focal lengths, which makes it very useful for close-up work. All of the focusing and zooming action is done internally, with no changes in the size of the lens. Its ultrasonic autofocus motor enables smooth and silent autofocus action and manual focus override in One Shot AF mode allows precise manual focusing without switching into MF mode. It only uses lead-free optics to help the environment, and features a circular diaphragm for improved background blur. The housing is water and dust resistant to help ensure reliable performance for both professionals and enthusiasts. Like many "L" lenses, it uses 77mm filters, but also has a rear gelatin filter slot behind the lens mount that can hold three gel filters. This lens is a Canon 'EF' series lens, indicating it is for use with full-frame cameras. However, it also works with APS-C format DSLRs and offers a 35mm focal length equivalence of 27-64mm, making it an ideal medium-aperture standard zoom lens. A super wide-angle zoom lens for full-frame DSLR and 35mm film cameras that offers a 27-64mm focal length equivalent when used on APS-c size sensors. Uses three aspherical lens elements and Canon Super UD ultra-low dispersion glass for reduced aberrations and overall sharp, high contrast imaging An ultrasonic autofocus motor provides fast, smooth and quiet AF action, particularly important when shooting video. Manual focus override enables precise manual focusing even when in One Shot AF mode. Internal zooming and focusing systems As a Canon "L" series lens it provides professional levels of moisture and dust resistance. Circular aperture diaphragm for better, more natural looking background blurring Accepts 77mm filters, as well as gelatin filters at the rear of the lens. Principal specifications Lens type Zoom lens Max Format size 35mm FF Focal length 17–40 mm Image stabilization No Lens mount Canon EF Aperture Maximum aperture F4 Minimum aperture F22 Aperture ring No Number of diaphragm blades 7 Optics Elements 12 Groups 9 Special elements / coatings Super Spectra coatings Focus Minimum focus 0.28 m (11.02″) Maximum magnification 0.24× Autofocus Yes Motor type Ultrasonic Full time manual Yes Focus method Internal Distance scale Yes DoF scale Yes Physical Weight 500 g (1.10 lb) Diameter 84 mm (3.29″) Length 97 mm (3.81″) Materials Metal barrel, metal mount Sealing Yes Colour Black Zoom method Rotary (internal) Power zoom No Zoom lock No Filter thread 77.0 mm Hood product code EW-83E Tripod collar No Optional accessories Soft Case LP1319 Canon EF 17-40mm f/4L USM Lens E-77 II 77mm Lens Cap Lens Dust Cap E (Rear) EW-83E Lens Hood Lens Case LP1319 Delivery Address If you wish to pay using your card then unfortunately due to the value of the products we sell we can only send orders to the billing address of your card. However, If you need to have an item delivered to an alternative address to your billing address then we can do this but you would have to select to pay via either Bank Transfer or Amazon Pay. By using Amazon Payments you can select one of your saved address on Amazon for your delivery - we are happy to help over the telephone if you have not used Amazon Payments before or if you are having any problems. We understand this can sometimes be difficult with work commitments, but we will do our best to accommodate your needs. Please note we are unable to accept card payments for orders placed from outside of the UK, the only methods of payment we can accept for orders from outside of the UK would be a bank transfer or Amazon Pay. Shipping Time For UK we normally ship out your order within 3 to 5 working days of receiving your cleared payment. If you require delivery by or before a certain date please call us on 02086695668 and we will do our best to accommodate your needs. Shipping insurance is included in the cost of delivery. The following table is a guide to shipping times for orders: UK Ireland Rest of Europe FedEx / Royal Mail UPS UPS 3-5 Working days from Payment Processing 5-7 Working days from Payment Processing 5-10 Working days from Payment Processing Collections Alternatively, if you would rather come and collect from our office, you are more than welcome to. We would just require you to call us first on 02086695668 to place an order with us beforehand to check stock availability, and once your order is ready to collect, our sales team will contact you. Specifications Brand: CANON Condition: New Product Code: 08230-00009-00 Reviews Write an online review and share your thoughts with other shoppers! Steve Graeme - St Ives , Cambs Exemplary service. Polite and helpful UK based people on the end of the 'phone. Great price and superfast delivery - lens arrived a.m. third working day from order. Even the courier went the extra mile. All in all a perfect 5*.