The 3.8-5.9mm f/3.7-4 Zoom Lens for Q Mount Cameras from Pentax is an extremely light and compact wide-angle zoom lens for the Q-series cameras. When mounted on the Q7 mirrorless camera it provides the 35mm focal length equivalence of 17.5-27mm and when mounted on the Q or Q10 cameras its 35mm equivalence is 21-32.5mm. An internal stepper motor autofocus mechanism provides fast, quiet AF action and the Quick-Shift Focus System enables instant switchover from auto to manual focus mode. Its optical design includes a Dual Super Aspherical element and an Extra-low Dispersion element for reduced chromatic aberration and overall sharp, high resolution images.

See recent price change history for the Pentax 3.8-5.9mm f/3.7-4 for Q.