“The Pentax 55-300mm F4-5.8 has long been a popular choice among Pentax users— its solid image quality, convenient zoom range, and low cost were difficult to match. However, as the lens design dates back to 2008, it lacks quick or silent autofocus, and instead relies on the classic screwdrive mechanism.
2016 brought us a new lens which addresses this issue: the Pentax 55-300mm F4.5-6.3 PLM debuts the PLM motor, which delivers the fastest autofocus in any Pentax lens to date. In addition, this new lens is smaller (thanks to a collapsible design) and lighter. But does it live up to its predecessor’s image quality? Will it be the new go-to lens for entry-level telephoto shooting? Read our in-depth review to find out!”
Read more at pentaxforums.com
HD PENTAX-DA 55-300mm F4.5-6.3 ED PLM WR RE vs HD PENTAX-DA 55-300mm F4-5.8 ED WR – AF Test