Fotasy Pro Pentax DA K Mount lens to Micro 4/3 MFT System Camera Mount Adapter, with Aperture Control This high quality adapter is with Aperture Control Ring, it can control the aperture (F-Stop) of Pentax new DA lens which is without aperture ring. It allows Pentax DA lens to be used on Micro 4/3 MFT camera body. If allows fits Pentax M, A mount lens, these are older Pentax PK mount lesses which are with aperture ring. Pls note the focus and aperture of the lens has to be used manually. Brand: Fotasy