Are you a professional photographer seeking unparalleled telephoto performance The Canon Ef 100-400mm f/4.5-5.6L Is Ii Usm lens is a high-caliber, long telephoto zoom lens meticulously engineered for use with Canon's full-frame DSLRs, and it's also compatible with Aps-c models for added versatility. This lens has been reimagined with cutting-edge technology, incorporating the latest in image stabilization, autofocus, and lens design to deliver superior image quality and lightning-fast Af.Capture the world with exceptional clarity and minimal distortion, thanks to the advanced optics of this lens. It features an Air Sphere Coating (Asc) on multiple elements to significantly reduce backlit flaring and ghosting, ensuring your images are crisp and high-contrast even in challenging lighting conditions.