The Tamron SP A005 lens is made from expert materials that help stop chromatic abnormalities from occurring. The superior optical design of the Tamron camera lens for Sony features low dispersion and extra low dispersion lens elements that prevent photo distortion. The materials help the photographer who's using the Tamron SP A005 with a camera take excellent photos with sharp contrast and great performance. In addition, the auto-focus mechanism on the 70 - 300 mm f/4.0-5.6 lens, otherwise known as the USD (Ultra Silent Drive), results in speed, which is ideal for taking photos of racing activities, sports, and more. With the 70 - 300 mm f/4.0-5.6 lens, enjoy a VC (vibration compensation) image stabilization that helps with handheld photography by reducing camera shake. Use the Tamron camera lens for Sony in low-lit areas and achieve photos that will turn out extraordinary. In conclusion, the Tamron SP A005 works well for photographers who desire to capture photos of fast-moving subjects.