The cubs didn’t seem to be experienced swimming in the swift current of the Uganik River but they obediently followed Mama Bear into the rushing water when she went in. They were swept by us so quickly and so close to us that for almost 30 seconds I was unable to see them in my viewfinder with my 500mm lens with its 1.4X teleconverter and DX mode engaged (1050mm total) let alone focus and press the shutter release. This was the last shot I took before the cub was swept along by the current and before I was able to pick up this one and the rest of the cubs with mama on the other side. Mama Bear seems to be watching me watching her cub.