The 70-300 on a crop camera is tricky, because of the magnification. Trying to handhold a 8.5x magnification without IS/VR is HARD. This is my beef about some of these kits. They put a non IS/VR lens as the long lens, when that is where the IS/VR is NEEDED, especially with a crop sensor camera. In high school, shooting 35mm film, our hand hold limit was a 300mm lens (6x). And some could not do it, they stopped at 200mm (4x). You get steady, you had to setup and shoot like shooting a target rifle. Set up the 70-300 on a bean bag to be steady, shutter speed at least 1/1000 sec, and take a picture. If it isn't sharp, the lens may be at fault.