CIA File of the Day
GUIDANCE TO UFO PHOTOGRAPHERS
A one-page instruction sheet for people photographing unidentified flying objects. It tells the photographer to have the camera set at infinity, that fast film such as Tri-X is very good, and that shutter speeds for moving objects should not be slower than one hundredth of a second. It also says to take several pictures and, if possible, include some ground in the frame.
Courtesy of the CIA FOIA Electronic Reading Room. Official page: CIA FOIA Electronic Reading Room. Document PDF: cia.gov reading room PDF. Copy: Internet Archive.