The Pentax K mount was introduced in 1975 and Pentax produced a huge range of lenses under this mount including the excellent SMC Takumar and SMC Pentax series. This Fotga adapter allows Pentax K mount lenses to be used on Micro Four Thirds bodies. Pentax K lenses are plentiful and affordable, making this a very useful adapter for exploring vintage glass.
This is one of my favourite adapters as I have a good few vintage Pentax lenses. They produce excellent images.