Canon EF 17-40mm f/4L USM Lens
• EF-Mount Lens/Full-Frame Format
• Aperture Range: f/4 to f/22
• One Super Ultra-Low Dispersion Element
• Three Aspherical Element
Spanning a versatile wide-angle range, the EF 17-40mm f/4L USM Lens is a Canon L-series zoom featuring a constant f/4 maximum aperture along with a sophisticated optical design and durable construction. One Super UD element is featured, along with three aspherical elements, which help to reduce both chromatic and spherical aberrations in order to realize high sharpness, clarity, and color accuracy.
• Lens Front & Rear Cap