persistence and patience is the name of this game! Book in lap, a comfy chair and remote release at the ready with everything pre-focused I just had t wait this one out. Fortunately the flurry of busy bees was a frequent enough occurrence that I only had a 30 min wait to get this. Depth of field is actually the hardest part because the bees don't have a flight path that's aligned to the narrow focal plain necessary to throw the background out of focus, so typically with so many shots in photography compromises have to be made. I think this is reasonably close but a bit more detail on the bee is what I really wanted but didn't quite get this time round.