Ricoh has announced the HD Pentax DA AF 1.4X AW Rear Converter – a weather-resistant 1.4x teleconverter. It’s designed to maintain autofocus both with lenses that use built-in focus motors, and those which are driven from the camera body. It’ll be available in March 2014 for a price of $ 599.95 / £379.99. See full details, including a list of compatible lenses
News: Digital Photography Review (dpreview.com)