Pentax's flagship ultra-wide zoom — f/2.8 constant with all-weather sealing for K mount APS-C.
The Pentax HD DA* 11-18mm f/2.8 ED DC AW is a flagship ultra-wide-angle zoom for Pentax K mount APS-C cameras, offering a constant f/2.8 aperture with full weather sealing across a 16.5-27mm equivalent range. The Star designation places it in Pentax's highest optical tier alongside the most demanding professional lenses.
Optical quality is outstanding with ED glass controlling chromatic aberration and the HD coating delivering exceptional contrast and flare resistance. The constant f/2.8 is remarkable for an ultra-wide zoom, providing excellent low-light capability and making it one of the fastest ultra-wide zooms available for any APS-C system.
Build quality features comprehensive AW (All Weather) sealing that matches Pentax's weather-resistant camera bodies, creating a fully sealed ultra-wide system for outdoor photography in any conditions. The DC motor provides quiet autofocus, and the Star-series construction quality is built to withstand years of professional field use.
On the used market, the DA* 11-18mm f/2.8 is the finest ultra-wide zoom available for the Pentax K mount system. For Pentax APS-C photographers wanting the ultimate in wide-angle capability with weather sealing and fast constant aperture, it represents the pinnacle of what the system offers in this critical focal range.