Hi @pisteem01 I am an enthusiast for old lenses on my modern cameras. As a hobby photographer in the 1970s and 1980s I used a Pentax K1000 and I still have my K-fit lenses. I have adapters now for Micro-four-thirds , Fuji-X and Canon EOS. I mainly source my lenses from charity shops or second hand shops. I do not have the Bokeh King though I have an interesting set. I don't do review type comparisons. I just use the lens as any other.