The HD Pentax-D FA 24-70mm f/2.8ED SDM WR Lens from Pentax is a versatile standard zoom lens characterized by its advanced optical design. It is compatible with full-frame K mount DSLRs and APS-C cameras, providing an equivalent focal length range of 36-105mm. The lens maintains a constant maximum aperture of f/2.8, ensuring reliable performance across the entire zoom range, and features a rounded nine-blade diaphragm that facilitates the creation of smooth, shallow depth of field effects. Its construction includes three extra-low dispersion elements, three aspherical elements, and one anomalous dispersion aspherical element, all aimed at minimizing various aberrations and distortions, resulting in images that are sharp and evenly illuminated. Additionally, an HD coating has been applied to enhance performance in challenging lighting situations by reducing lens flare and ghosting, thereby improving contrast and color fidelity. In terms of functionality, the lens is equipped with a Supersonic Direct-drive Motor, which provides rapid, silent, and efficient autofocus, making it suitable for both photography and videography. Furthermore, its weather-resistant design allows for use in adverse conditions, while features such as a Quick-Shift Focus System and a zoom lock lever enhance user control and handling. Standard 24-70mm zoom lens is designed for Pentax K mount full-frame DSLRs/SLRs and is also compatible with APS-C models where it will provide a 36-105mm equivalent focal length range. Fast f/2.8 constant maximum aperture offers consistent performance throughout the zoom range, benefits working in difficult lighting conditions, and offers greater control over focus position for shallow depth of field applications. A 17 elements in 12 groups design features three extra-low dispersion elements, three aspherical elements, and one anomalous dispersion glass-molded aspherical element. This combination helps to substantially reduce chromatic aberrations and various distortions throughout the zoom range and also offers enhanced sharpness, clarity, and edge-to-edge illumination throughout the aperture range. An HD coating has been applied to lens elements to minimize flare and ghosting for increased contrast and color neutrality when working in harsh, backlit lighting conditions. A Supersonic Direct-drive Motor (SDM) benefits autofocus operation with smooth, quiet, and accurate performance to support both stills and video applications. A weather-resistant construction incorporates five weather seals to protect against moisture for working in inclement conditions. A rounded nine-blade diaphragm contributes to a pleasing out-of-focus quality when working with selective focus and shallow depth of field techniques. Quick-Shift Focus System lets you manually control focus at any time, even when working in AF mode, by simply rotating the focus ring. A zoom lock lever prevents the lens from extending under its own weight when carrying.
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