I've never really used this lens much, so I've decided to sell it. The RF100-500mm F4.5-7.1 L IS USM super telephoto zoom lens delivers a superb combination of cutting-edge performance, compact construction and brilliant resolving power specifically designed for the EOS R system. The versatile range of 100mm to 500mm is ideal for sports, wildlife, and even aviation photography while maintaining a compact, travel-ready size and weight. The lens features one Super UD and six UD lenses. Fluorine coated front and rear lens elements provide resistance to dirt, moisture and oils, while L-series construction with dust and weather resistance provide reliability even in challenging conditions. With its built-in, 3-mode, and up-to 5-stop optical image stabilization system, and high-speed Dual Nano USM autofocus motors, the RF100-500mm F4.5-7.1 L IS USM will prove its superb optical performance, over and over again. Features High Performance L-series versatile Super-Telephoto Zoom RF Lens Optical Image Stabilization with up to 5 Stops of Shake Correction Three Image Stabilization Modes (Standard, Panning, and during exposure only) for Creative Versatility. High Speed, Smooth and Quiet Auto Focus with Dual Nano USM. Minimum Focusing Distance of 2.95 ft. / 0.9 m Rotation-type Zoom Ring and Torque Adjustment allows for Precise Composition or Traveling Convenience. Filter Diameter: 77mm