Steve, many thanks for the help but I must confess that before I read your post I went out and bought the Sony one. Got the 75-300mm for a good price, £179.99 with a 10% discount from my sister and a further £50 cash-back so think I did well on the price. Got it in my head that I needed the greater length so I could get better close up pic's of the kids on the rides as was disappointed last time with our other camera. So now that I have made my choice, good or bad, will have to get some practice in as we are away in six weeks. Thanks again.