bumble be on Sedum

Inbetween the showers I managed to get out and do some work in the garden. 
Tried my best taking some closed ups of the bumble bees who were busy on the yellow flowers. It's so hard to get this in focus, they are constantly on the move and by the time I clicked they were onto the next flower. After a while I started guessing where they would go next and this is the best I could muster.