The Pentax 70mm f/2.4 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 21mm f/3.2 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 portrait-length, short-telephoto pancake prime for traveling. 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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