I heard that it's a very sharp lens, also heard that it's total crap. Which one is it ? As I understand the AF is slow. How slow ? Is it slower than SEL50F18 ? About the same ? How accurate is it ? How sharp throughout the focal range ? Can someone compare it to, say, Canon 55-250 IS or Tamron 70-300 VC, IQ-wise ? How good / bad is the bokeh ? I like to have a tele lens (as long as it's not huge) but I don't use it for actual tele work. I like to use it for portraits, the background compression it allows, the ability to take candid shots without being in people's faces with the camera. This means that the lens doesn't have to be fast focusing or good in tracking, but it needs to be relatively sharp wide open, have accurate AF, very good bokeh, and decent stabilization. Would SEL55210 meet these criteria ?