Weather-resistant
Interchangeable lenses are precise optical instruments and essential tools for working professionals.
These tools must perform at or above expectations in harsh conditions, rain or shine, indoors or out. Canon considers feedback from professionals who use our lenses to be an important factor in its efforts to improve lens performance. Professionals frequently have to work in harsh conditions, including dust, wind, rain, and snow. When Canon introduced a new series of dust- and water-resistant super telephoto lenses in 1999, it assumed that its products would have to perform in extreme conditions like these.
Today, efforts to meet these exacting standards continue. A rubber ring was added to the mount connection to protect the gap between the camera and lens from the elements when they are attached. The focus ring, focus preset playback, and other moving parts were all made of highly dust- and moisture-resistant materials. Switch panels and drop-in filter holders were rubberised. In today's digital imaging age, professional lenses' performance will be tested in an ever-widening range of environmental conditions, just as professionals expect them to deliver superior imaging results. Canon's pursuit of superior dust- and water-resistance continues with the RF L-series lenses. The entire system, including the lens, body, and accessories, is intended to meet the most exacting standards of professional image makers.
* This cannot guarantee complete exclusion of water and dust from entry. The lens must be attached to the camera body to ensure dust- and moisture-resistance performance.