Pairing the relatively compact, yet long-reaching, telephoto zoom with a teleconverter to further extend its reach, the Sigma SA-mount 150-600mm f/5-6.3 DG OS HSM Contemporary Lens and TC-1401 1.4x Teleconverter Kit from Sigma is a complete lens setup ideal for sports, wildlife, and nature photographers.The 150-600mm f/5-6.3 DG OS HSM Contemporary lens covers an extensive range of telephoto focal lengths and employs one FLD element and three SLD elements within its optical design to produce well-corrected imagery with reduced chromatic aberrations and color fringing. A Super Multi-Layer Coating has also been applied to suppress lens flare and ghosting for increased contrast and color fidelity when working in strong lighting conditions. Complementing the optical aspects, the lens is also characterized by an apt Optical Stabilizer system that helps to minimize the appearance of camera shake for sharper handheld shooting. A Hyper Sonic Motor also provides quick, quiet focusing performance and the dust- and splash-proof construction benefits working in harsh climates.Included with the lens is the TC-1401 1.4x Teleconverter, which extends the effective focal length of the 150-600mm lens to 210-840mm with a one stop loss of light. The teleconverter's design maintains communication between the camera and lens, including both autofocus and auto-exposure controls, and one Special Low Dispersion element is featured in the optical design to maintain the lens' quality.