Tamron 17-28mm f/2.8 Di III RXD Lens for Sony E comes with plush features for optimum performance. Some of its highlights include an Aperture Range of f/2.8 to f/22, XLD and LD Elements, BBAR and Fluorine Coatings, RXD Stepping AF Motor, Moisture-Resistant Construction, Rounded 9-Blade Diaphragm, and so on. With its gleaming f/2.8 maximum aperture, you can be certain of flawless, consistent illumination when working in areas with poor lighting conditions. This enables greater control over the depth of field so that there can be effective working with selective focus techniques. A BBAR (Broad-Band Anti-Reflection) Coating has been applied to individual elements for effective reduction of internal reflections, flare, as well as ghosting. Hence, you will be able to realize greater contrast and color fidelity when working in areas with strong lighting. It comes with an XLD (eXtra Low Dispersion) as well as an LD (Low Dispersion) elements for reduction of color fringing as well as chromatic aberrations all-through the zoom range so that you can achieve sharp imagery with accurate rendering. Our Take on the Tamron 17-28mm f/2.8 Di III RXD Lens for Sony E: The Tamron 17-28mm f/2.8 Di III RXD Lens for Sony E is specifically produced for full-frame Sony E-mount mirrorless cameras, and APS-C models can use it with an equivalent focal length range of 25.5-42mm. It comes with a rounded nine-blade diaphragm, which helps in enhancing selective focus technique as well as the use of shallow depth of field. That is why this lens is well-loved by top professional and amateur photographers. With its maximum aperture standing at f/2.8, and a minimum aperture of f/22, it is certainly one of the most sought-after lenses in the market presently. Its focal length ranges between 17 and 28 millimeters, hence, you can be sure of capturing images the way you want them