F/ratio ? 2.34
Focal length (mm)? 30
Select film/image format:
   (1) 35-mm
   (2) 120 square
   (3) 4 x 5
   (4) 8 x 10
   (5) Special area
   (6) Fisheye (180 deg)
Selection? 1
Sky area (sq deg):  2700 
Efficiency   54.2

Another (y or n)? n
