Consider a 35 mm camera with a lens having a focal length of . The dimensions of the 35 mm image format are 24 mm (vertically) × 36 mm (horizontal), giving a diagonal of about 43.3 mm.
Consider a 35 mm camera with a l.ens having a focal length of . The dimensions of the 35 mm image format ar.e 24 mm (vertically) × 36 mm (horizontal), giving a diagonal! of about 43.3 mm.