Hey, i'm really hoping I'm missing something obvious, but i've now tried two of these adapters purchased from Henry's (Canada), and got the same result from each adapter. Essentially, things seem fine as long as your focus point is roughly within the same room, but when you try to focus beyond 12 or 15 feet away, it's game over. I'm using it on a G3 w/ a Pentax 55mm F1.8: SMC Pentax 55mm F1.8 Reviews - K Prime Lenses - Pentax Lens Reviews & Lens Database And a Pentax M 28mm f3.5: SMC Pentax-M 28mm F3.5 Reviews - M Prime Lenses - Pentax Lens Reviews & Lens Database The issue is even more egregious with the 28mm, as it will not focus beyond 7 or 8 feet away . The results with the 55mm in particular are very promising for close range subjects. I am of course able to get the focus point to move further away by closing down the aperture, fairly significantly, to f16 and f22 (seems absurd to need to do this, not to mention counter-intuitive for the appeal of older, fast glass). Essentially I'm wondering if this merely an albeit fairly extreme example of the common problem with "cheap" ($50) adapters not being able to focus to infinity? It just seems so out in left field, im totally stumped.