[wadooz]

Hi gang, a while ago I posted a question about the chosen shutter speed of my 450D when in AV mode compared to the speed chosen at the same aperture size when in full auto. I still suspect my camera may be faulty.
On Tuesday we spent the day at Adelaide Zoo with my daughter. I used my 450D and she used her 550D. We both used our 55-250 kit lens. I used my tripod and cable shutter release and she was hand help. It was bright sunshine and 34.C. We compared settings and even though we were both using F5.4, W/B set to Sunshine, her shutter speed was very fast and mine was around 1/60 sec. Her images were pin sharp and most of mine were blurred. We both switched back and forth from A/F to M/F. I occasionally achieved reasonable results and I understand that my camera only has 12 Mps compared to her 18, but on the whole I was very disappointed. I took 255 images and deleted more than half purely because of the poor image quality. Looking back I wished I'd asked to swap lenses for a while to see it mine showed different results on her camera. Is it possible the aperture isn't opening to the size selected?
Should I now think about taking my camera (or lens) in for a check up?