I kept a few random lenses when I recently switched over to Fuji so ordered an adapter to start giving them a go.
The smc PENTAX-F 50mm f1.7 which I've had from a film camera way back has wonderfully old fashioned hexagonal aperture blades which give a strong shape to out of focus spectral highlights which in the right shot I absolutely love - tried it today but as its flinging it down with rain I couldn't do much but know it works, know its easy to focus and the X-T1 operated perfectly in Aperture Priory mode making exposure a cinch.
From the same lens but taken previously with a K30:
