 The cruise phase was a relatively uneventful part of the flight , except for the crew checking that the spacecraft was in working order and that they were on course . During this time , NASA scheduled a television broadcast at 31 hours after launch . The Apollo 8 crew used a 2 kg camera that broadcast in black @-@ and @-@ white only , using a <unk> tube . The camera had two lenses , a very wide @-@ angle ( 160 ° ) lens , and a telephoto ( 9 ° ) lens . 
