Shooting of a flight of an owl at Zoo Stralsund. These birds fly fast and super silent. The problem for the camera (Nikon D5100) is that the shutter speed must be fast (1/1000s), the ISO high enough (ISO 400-800), and the autofocus must be very fast. Focussing is set up for center focus only. The lens is a the Kit Lens 18-105.

These photos show that the camera has trouble with the focusing. The only images that are sharp or the last ones where the owl stops. Additional the noise at ISO 800 worsens the sharpness noticable.