During the crane shot at the beginning of the sword fight between Robin and Bertrand De Nivelle, the shadow of the cameraman is visible on the ground.
When Robin and Little John have a conversation with Gisburne and the soldiers across the stream, there is a crew member standing in the background behind Robin the entire scene.
You can clearly see the string attached to the water skin that Bertrand is about drink from in the scene before Robin shoots an arrow at it.