Ricoh officially unveils the fast, F2.8 Normal Zoom lens, ‘HD Pentax-DA* 16–50mm F2.8 ED PLM AW’ for Pentax K-mount APS-C sensor DSLR cameras. with a distance equivalent to that of a 24.5-76.5mm lens on a full frame camera With all-weather (AW) splash and dust seal, it can be used in all weather slot

The lens construction consists of 16 elements in 10 groups, 1 special ED lens, 1 anomalous dispersion optical and 2 ED aspherical elements, with HD Coating to reduce flare and ghosting.

Ricoh says the HD Pentax-DA* 16–50mm F2.8 ED PLM AW is the first large aperture Pentax lens to use an 'advanced pulse motor' (PLM) focusing motor. You can also press the shutter button halfway and quickly turn the focus ring to use manual focus.

The lens can also focus as close as 0.3 meters, providing a maximum magnification of 0.24x with 9 aperture blades for beautiful round bokeh. It supports electric aperture adjustment with Pentax KAF4 mount cameras.

HD Pentax-DA* 16-50mm F2.8 ED PLM AW Specs
Focal length 16-50mm (24.5-76.5mm on a full frame camera)
Aperture F2.8-22
9 aperture blades
Lens construction: 16 elements, 10 groups (1 ED special lens element, 1 anomalous dispersion optical, 2 ED aspherical)
The closest focusing distance is 0.3 meters.
Maximum gain 0.24x
AF motor ‘advanced pulse motor’ (PLM)
Internal focus
Filter 77mm
All-weather (AW) waterproof and dustproof seals are included.
Material made of Magnesium alloy
Size 84 x 117mm
Weight 712 grams
Mount Pentax KAF4

HD Pentax-DA* 16-50mm F2.8 ED PLM AW is priced at $1,400 or about 45,700 baht and will be available in August 2021.