>The cons are: >-Shows up poor technique >-Shows up poor sensor/colour noise
I have one too, and as you say, it is a really nice lens. But I also have a 55-300 that I use more, because it is smaller and lighter and easier to carry. Another con is the size and weight of the lens. I'm certainly not inclined to part with mine, though. There are situations where an f2.8 zoom will do the job that my slower zoom could not handle.