Perspective compression effect that draws even greater attention to subjects This super performance (SP) tele-zoom has everything to satisfy the desires of nature or sport photographers. Distant and elusive wildlife, birding, team sports, motorsports and surveillance are just a few of the photographic conditions that demand both zoom versatility and extreme telephoto power. APS-C-sensor photographers will enjoy super-telephoto magnification, with a picture angle range approximating a 310-775mm lens on a 35mm film or full-frame DSLR. Featuring LD (Low Dispersion Glass) to combat chromatic aberrations and an Internal Focus mechanism that maintains a fixed barrel length when focusing, the SP 200-500mm provides high telephoto magnification accompanied by the sought-after perspective compression effect that draws even greater attention to subjects. The extreme tele-end lets you bring your far away subjects up close and allows you to capture the images in a frame-filling format. The power to bring your subject nearer makes for interesting image compositions, and extends the photographic and creative horizon substantially. Furthermore, the lens offers fantastic image quality thanks to the application of modern design principles and high-quality glass. The SP 200-500mm is an easy choice for outdoor enthusiasts who often must hike great distances with their gear, in search of their subjects. Tamron lenses bearing the SP designation feature impressive and innovative designs Super Performance for Discriminating Shooters (SP) Tamron SP (Super Performance) series is a line of ultra-high-performance lenses designed and manufactured to the exacting specifications demanded by professionals and others who require the highest possible image quality.