Canon 24-105Mm F/4 L Is Usm Lens. The L-Series Is Canon’S Flagship Professional Lens Range, Representing The Best In Precision-Designed Ef Optics. L-Series Lenses Combine Superior Performance With Superlative Handling, And Are Resistant To Dust And Moisture. The Ef 24-105Mm F/4L Is Usm Features Canon’S Three-Stop Image Stabilizer (Is), Making It Ideal For Handheld Work. Is Permits The Use Of Shutter Speeds Up To Three Stops Slower Than Normal, With No Perceptible Increase In Image Blur From Camera Shake. E7Magnification – Extension Tube EF25 II – ¹ Only compatible at tele.