Versatile Wide-Angle Zoom. The Tamron 17-28mm f/2.8 Di III RXD’s ultra-wide to wide zoom range makes it ideal for landscape photography, architectural photography, and astrophotography. Its fast, constant f/2.8 aperture gives you excellent depth-of-field control and consistent brightness throughout the zoom range. Using an APS-C camera? This lens will give you 25.5-42mm equivalent focal length.

Advanced Optics. The eleven-group/thirteen-element optical formula incorporates XLD and LD elements to give you sharp, high-contrast images across the image plane. Each element features Tamron’s BBAR coating to combat flare and ghosting for even greater contrast in backlit and harsh lighting conditions.

Fast, Accurate Autofocus. The 17-28mm autofocuses quickly, accurately, and smoothly, making it ideal for still and video use. It also offers full-time manual-focus override for even greater precision. Its 7.5-inch minimum focusing distance makes it useful for working with close-up subjects.

Durable Construction. You can use this lens in inclement conditions thanks to its moisture-resistant build. The front lens’s fluorine coating protects against smearing and debris.