agillot wrote:
4 years ago i bought a fotodiox adapter to use older pentax lenses on nikon .[ d300] .The issue i had was that out in sun lit day , even with sun in back , i ended with a donut shape ring light spot on some pictures . So to solve that i bought a 6 mp pentax camera used [ like new ] from japan . [ ist D ].
I looked into this issue a few years back. I think the pro version gives better fit and better accuracy on infinity focusing point.