hi i am looking at getting a long zoom lens for mostly wildlife shots, and these two seem both good. what im wondering is if it is worth spending the extra $600 to get the wider angle 50-500 or is this a waste of money? it is probably not something that will be left on the camera due to the weight and size, and my 15-85 is left on when hiking etc? most likley to be used around camp and the car.
i will be away next week so apologies if im slow to reply