Actually that can be a big problem. Focus beyond infinity may sound good, but in practice it makes for blurry photos when you try to catch something far away in focus and the infinity stop on the lens doesn't correspond to actual infinity focus. Ask me how I know... Given what I know now, I'd buy the Novoflex adapter in a second if it ensures perfect infinity focus, and if it fits perfectly. I've spent about that much in money, and much more than that in time making the cheap adapters work properly.Guys focus to infinity depends ........ On most chinese cheap adapters it will focus a bit beyond to ensure that you have infinity. Then it is not a problem .