Tamron 200mm f/3.5 is a compact close focusing telephoto lens. This lightweight telephoto offers a more expensive dual focus helicoid allowing the rear elements move at a different rate than the front focus elements. This provides a relative good degree of correction for close focusing generated aberrations. Thus this lens offers improved performance at close focusing distances compared to most other after market 200mm telephotos. This lens also is a good lens for portrait photography. Egrogomics and handling are superb, and a retractable lens shade is also built into the front of the lens.