Let’s have a look at the fantastic feature of the lens.
Superior Optical Performance
The superior optical performance is outstanding because of EF17-40mm f/4L USM. It has twelve lens elements arranged in nine groups. Super Spectra coating ensures good color and proper balance in minimizing ghosting flare. To provide the dull image quality over the 17-40mm zoom range. The lens uses three aspheric elements to help you get a clear shot.
The EF 17-40mm f/4L USM is useful in ultra-wide angle zoom on film or full-frame digital EOS cameras. On DSLRs equipped with APS-C sized sensors, it acts as a standard range zoom, giving a proper angle of view equivalent to a 28-70mm lens on a full-frame camera.
The minimum focus of Canon EF 17 distance is just 28cm throughout the zoom range.
The good thing about the lens is that it is highly resistant to moisture and dust, and the EF17-40mm f/4L USM is an ideal feature. The best thing about this lens is you can use it in harmful or harsh environments.
Smooth Background Blur
Have you ever wondered how the professional image has blur smooth background blur? It is possible with a smooth blur option in the lens. A virtually circular aperture proper diaphragm gives out-of-focus regions a softer and uniform feel. This is not enough; the sharp foreground objects stand against a smooth blurred background.
A ring-type ultrasonic motor drives use to focus on multiple intersecting beams. The autofocus of the lens is extremely quick. The excellent holding torque ensures the exact focus point is reached accurately on the object without overshooting.
Furthermore, full-time manual override is also available in the lens. You can make it possible to adjust focus without leaving the AF mode of the lens. All these features will make your photography experience more advanced.
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