Canon EF 17-40mm f/4L USM - White box

Canon EF 17-40mm f/4L USM - White box

The EF 17-40xa0mm f/4L USM is an ultra-wide-angle zoom lens that offers excellent image quality and a constant maximum aperture. Its compact and lightweight body makes it an ideal travel companion.

Advantages

• Excellent optical performance throughout the zoom range
• Fast autofocus
• Highly resistant to dust and moisture
• 28x0cm minimum focusing distance with any focal length

Features in detail

Ultra wide angle or standard zoom The EF 17-40xa0mm f/4L USM provides an ultra-wide-angle zoom for film or full-frame digital EOS cameras. On DSLRs with APS-C sized sensors, it acts as a standard zoom, providing an angle of view equivalent to a 28-70xa0mm lens on a full-frame camera.

Close focus

The minimum focusing distance is just 28x0cm throughout the entire zoom range.

Excellent optical performance

The EF17-40xA0mm f/4L USM has 12 lens elements arranged in nine groups. Super Spectra coating ensures excellent color balance and reduces ghosting and flare. The lens uses three aspherical elements to ensure perfect image quality throughout the 17-40xA0mm zoom range. Super UD (Extra-low Dispersion) glass prevents color distortion.

Ultrasonic focusing A ring-type ultrasonic motor drives autofocus extremely quickly and almost silently. The excellent rotary control rings ensure that the focus point is reached precisely without overexposure. In addition, the full-time manual override allows focus to be adjusted without leaving AF mode.

Non-rotating front element The front of the lens does not rotate, making it easier to use specialized filters, such as polarizing or graduated filters. A removable gelatin filter holder is located at the back of the lens.

Smooth background blur The nearly circular aperture gives out-of-focus areas more softness and integrity, making sharp foreground subjects stand out against a smoothly blurred background. Weather resistant The EF17-40xa0mm f/4L USM lens is highly resistant to dust and moisture, making it ideal for use in harsh environments. It uses environmentally friendly lead-free glass throughout its construction.