printed in silver (in image) on paper label l.l. HASSELBAND printed on support reverse u.l. 50 / The instrument above, a gnomon, is used to determine the / size and distance of objects. The length of the shadow / can also be used to establish the sun's latitude and, ac- / cordingly, the exact spot on the moon at which the picture / was taken. It also has a grey scale to help in arriving at the / correct exposures. Apollo XII, November 1969. Hasselblad 500EL Data Camera. / (text repeated in German / French / Swedish) / COURTESY OF NASA.