SELECT PHOTO METHOD-- (A) PRIME FOCUS (B) BARLOW PROJ. (C) EYEPIECE PROJ. (D) AFOCAL METHOD (E) QUIT ? A OBJECTIVE F.L.? 7.89 APERTURE? 1.23 EXAMPLE F/NUMBER? 2.5 EXAMPLE FILM INDEX? 600 EXAMPLE TIME? 360 YOUR FILM INDEX? 1200 1185.05 IS YOUR TIME NEXT? SELECT PHOTO METHOD-- (A) PRIME FOCUS (B) BARLOW PROJ. (C) EYEPIECE PROJ. (D) AFOCAL METHOD (E) QUIT ? E