Visible crew/equipment: When the astronauts are running down a dusty hill in the desert, you can spot the shadow of the camera on the back of Landon and Dodge. (00:15:50)
Visible crew/equipment: During one of the scenes where an astronaut does an EVA (Extra Vehicular Activity or "Space Walk"), you see him floating slowly from the Pod shuttle towards the Discovery. This was filmed by hanging the pod on the ceiling and lowering the actor from it with a rope towards the camera that's pointing upward. If you look carefully, you can see the shadow of the rope.
Visible crew/equipment: When Barbarella is in her anti-gravity state during the credits, in a closeup of her removing her gloves, you can see reflections of her hands and the gloves in a plexiglass screen under her, which was to give the illusion that she was floating in the air. (00:00:50)
Visible crew/equipment: When Barbara is running around the house to find a way in, someone backs up (possibly with a camera in hand) behind a tree.