The Pentax 21mm f/3.2 Limited Series Pancake Lens is part of a series of tiny lenses for Pentax K mount cameras with crop sensors, along with the Pentax 40mm f/2.8 Limited Series Lens Pancake Lens and the Pentax 70mm f/2.4 Limited Series Pancake Lens. It integrates a Quick-Shift Focus System, which allows manual focus control over the lens at any time, even in AF mode, for precise handling over the focal plane. A high-grade, multi-layer HD coating has been applied to the lens' elements to help minimize flare and ghosting for enhanced contrast, clarity, and color fidelity. The nine-blade diaphragm contributes to a pleasing out-of-focus quality that benefits shallow depth of field imagery. At 1" in length, this is an ideal wide angle pancake prime for traveling, landscapes, events, and interiors. It is compatible with Pentax K Mount cameras with crop sensors only. It will vignette when paired with full frame sensor Pentax cameras.
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