|Choose Style||Body Only|
|Lens Mount||Canon EF|
|Focal Length||17 - 40 mm|
|Angle of View||Diagonal : 104° - 57° 30'
|Min. Focus Distance||28 cm|
|Max. Reproduction Ratio||1:4|
|Filter Thread||Front, 77 mm|
|Lens Hood||Yes, Removable|
|Lens Type||Wide Angle Lenses, Zoom Lenses|
|Speciality||Auto Focus, Constant Aperture Zoom|
|Physical Dimensions||8.35 cm x 9.68 cm|
|Physical Weight (Grams)||500g|
|Shipping Weight (Kg)||1.5000|
The Canon EF 17-40mm f/4L USM Lens is an L-series Canon lens designed for use with full-frame sensor cameras. However it is also compatible with APS-C sensor cameras, where it will deliver an equivalent 28-70mm zoom range.
There are various filters you can attach to this lens, which features a 77mm diameter. To create effects, you might enjoy working with a polarising filter such as the Kenko Pro1D 77mm polarizing filter, which will help to make skies bluer and remove surface reflection of water so you can see more detail beneath the surface. We do recommend always using a UV or clear filter however for general lens protection – great picks could include the B+W XS-Pro Digital 77mm Clear filter, the Kenko Pro1D 77mm protection filter, or the Hoya HD 77mm protection filter. These optically clear filters won’t affect image quality, but will help to reduce dust, and protect from scratches, moisture and other elements that might damage your lens.
As well as helping to stop unwanted sun rays entering the lens and creating glare, lens hoods do offer an element of immediate protection for the lens in case of accidental trips and falls.
The performance and life of the lens greatly depends on how you clean it. You may use a lens pen or a cleaning cloth but the use of a residual oil remover is always considered best. This is designed to emulsify and remove the microscopic film of oil residing on the surface of the lens that is caused by environmental pollution.