State-of-the-art Optical Design
The PENTAX-D HD FA 15-30mm f/2.8 ED SDM WR is a specialized wide angle zoom offering full-frame photographers an excellent f/2.8 constant aperture to deliver exceptional control over depth of field and the capability to work in low-light situations. It uses ED glass elements to diminish aberrations and contains HD multi-layer coatings to further limit flare and ghosting. Action is fast, with its Supersonic Direct-Drive Motor (SDM) for AF and it features a Quick-Shift focus system for instant switching between auto and manual focusing. Additionally, it can focus down to 11" for convenience.
Ensuring matchless performance on Pentax DSLRs, the lens is completely dust- and weather-resistant containing eight seals to protect from invasion. This is assisted by the inclusion of a Super Protect coating on the rounded front element along with a self contained lens hood for minimal damage in case of a misadventure. Additionally, it has a 9-bladed rounded diaphragm for buttery smooth out-of-focus images.
Handling ultra-wide thru wide-angle perspectives, this 15-30mm zoom provides a unique option for K-mount Pentax full frame DSLRs and also works with APS-C models, where it will deliver a 23-46mm (35mm equivalent) focal length range.
Constant f/2.8 maximum aperture sustains consistent performance all through the zoom range and also assists with enhanced selective focus control.
ED glass elements are integrated in the lens design and assist in controlling chromatic aberrations and diminish color fringing for increased clarity and color fidelity.
The High Definition (HD) multi-layer coating is employed to reduce reflections, flare, and ghosting for enhanced contrast and color in more difficult lighting conditions.
Super Protect coating and built-in lens hood help keep the optics protected in the event of unforeseen impact or when it contacts water or dust.
Supersonic Direct-Drive Motor (SDM) assures fast, quiet, and smoother AF operation.
A rounded nine-blade diaphragm pitches in for a pleasing bokeh image quality when shooting shallow depth of field techniques. It is totally rounded between f/2.8-4 when set at 15mm and between f/2.8-5.6 when set at 30mm.
A weather-resistant layout features eight seals which better permit shooting in inclement environments.