Large format refers to any imaging format of 4×5 inches (102×127 mm) or larger. Large format is larger than "
medium format", the 6×6 cm (2¼×2¼ inch) or 6×9 cm (2¼×3½ inch) size of
Hasselblad,
Rollei, Kowa, and
Pentax cameras (using
120- and 220-roll film), and much larger than the 24×36 mm (~ 1.0x1.5 inch) frame of
35 mm format. The main advantage of large format, film or digital, is higher resolution. A 4×5 inch image has about 16 times the area, and thus 16× the total resolution, of a 35 mm frame.