The wonderful thing about abstract art of any kind is the fact that focus itself on one subject isn’t necessary. It’s total content that counts as one image in an abstract presentation.
For the ABOVE image, I let my Canon PowerShot record this skier in real time, which was faster than my camera was set to catch the action. The result was this reflected photo, an interesting abstract.
Abstract Photo from the personal and copyrighted collection of Barbara Anne Helberg