Items Include: Tamron 11-20mm f/2.8 Di III-A RXD Lens , 3 Piece 67mm Filter Kit, Camera Cleaning Kit, 67mm Lens Hood, Lens Cap Keeper. Ultra-Wide Angle with Constant Bright f/2.8 Aperture for Low-Light Versatility: Designed for APS-C cameras, the Tamron 11-20mm f/2.8 Di III-A RXD lens provides a versatile ultra-wide angle, equivalent to 16.5-30mm in full-frame terms. The bright f/2.8 maximum aperture across the entire zoom range supports exceptional performance in low-light conditions, making it ideal for landscapes, interiors, and astrophotography.. Advanced Optical Design for Enhanced Sharpness and Clarity: This lens combines premium elements, including one XLD (Extra Low Dispersion), two GM (Glass-Molded Aspherical), and two LD (Low Dispersion) elements, to minimize chromatic aberrations and distortions. These precision-engineered components enhance edge-to-edge sharpness and color accuracy, delivering crisp and vibrant photos that make the most of your cameras sensor.. BBAR-G2