I bought this gun because I wanted to shoot birds and objects that I couldn’t get close to. I was surprised by the price, sharpness, which is at a fairly high level, although the more you hold down the aperture, the more of the frame will be sharp. The maximum sharpness across the frame is around f 11-16 and around 70-200mm. I was also surprised by the stub, you hold down the focus and the picture freezes, but it doesn’t always save. I focus on one point, and there are no problems with accuracy, except that you have to wait half a second until the motor drives the focus through the entire focal length. I shot both dog races and motorcycle races, there is very little marriage in focus. Learn to use focus settings.