70 - 200mm Focal Length Range/ f/ 2.8 Maximum Aperture/ FX Format Compatible/ 21 Lens Elements/ 18 Lens Groups/ Short-Wavelength Refractive Lens/ Class-Leading Close Focusing/ Varifocal Performance/ Superior Color And Sharpness/ Highly-Cinematic/ Optimal Anti-Reflective Performance/ Short-Wavelength Refractive Lens/ ED (Extra-Low Dispersion) Glass/ Electromagnetic Diaphragm Mechanism/ Black Finish