CUs of Dr Donald Macrea of University of Toronto looking in telescope eyepiece. CU of large numbered gauge, of Dr Macrea's head. CU of Macrea's eyes, glasses, looking into telescope. MS of spectrograph camera in upper foreground, Dr Macrea approaching desk. Shot of astronomer peering into telescope eyepiece, adjusting telescope with vernier controls, inserting plate into spectrograph. CU of hand adjusting micrometer spectrograph controls.