The Pentax-06 15-45mm f/2.8 is an 83-249mm equivalent telephoto zoom lens for Pentax Q series cameras. Thanks to its retractable design, the lens is designed to be super-compact and ultra-lightweight, weighing in at a mere 90 grams. The optical formula incorporates two ED (Extra-low Dispersion) glass elements and one super-low dispersion element. The lens has a built-in mechanical shutter that offers flash synchronisation right up to its fastest shutter speed. The Pentax-06 Telephoto Zoom 15-45mm f/2.8 lens is also equipped with a built-in ND (neutral density) filter, which comes in handy when shooting with open aperture in bright locations. The lens will be available from mid-October, at a recommended retail price of £249.99/$299.95. Note that the bespoke PH-RBA 40.5mm plastic lens hood will be an optional extra.