Really odd one for me: lens looks fine, nice and clean, focuses smoothly, aperture blades are great. When it works, I get great pictures.
However, tilting the camera up then down (or down then up, or side to side) can result in the lens suddenly losing infinity focus. The exact degree is variable: sometimes it will focus on something no more than 10 metres away, sometimes no more than 5, sometimes as low as no more than 1.5-2 metres. And when it does that the distortion it shows is bad. A pair of sample photos, straight OOC, where both are as focused as possible show what I mean.
(The bike is probably 3 metres away. The wall is 1.5 to 2 metres, at most, possibly even closer.)
Anyone ever seen anything like this before and have any idea what it might be? (I've already contacted the person I bought it from to see if I can return it, but no word yet.)
Last edited by g026r; 10-25-2013 at 06:27 PM.