Large format intro

relative Crop Factor = MF width / 36mm (135 film width)

Crop Factor = 1/ relative Crop Factor

(Note: 6 means 6cm in MF, 4 means 4inch in LF)

35mm 645 6×6 6×7 6×9 6×12 6×17 LF 6×24 LF 4×5“ 5×7” 8×10“
ActualfilmSize36×24 mm 56 x 42 mm56 x 56 mm56 x 72 mm56 x 84 mm56 x 112 mm56 x 168 mm 56 x 224 mm102×127 mm127 x 178mm20×25cm
size compare 1x 2.7x 3.6x 4.6x 5.4x 7.3x 11x 14.5x 15x 26x 58x
print size A3 A2 A2 A1 A1,A0 2xA2 3xA2 4xA2 2A0 4A0 8A0
4×5” 5×7“ 8×10” 11×14“ 14×17” 16×20“ 20×24” 40×80“
ActualfilmSize 102×127 mm127 x 178mm20×25cm 28x35cm 35x43cm 40x50cm50x60cm 100x200cm
size compare 15x 26x 58x 113x 174x 231x 347x 2314x
print size 2A0 4A0 8A0 16A0 24A0 32A0 48A0 308A0
135mm equivalent Angle of View (at the long end width)
rCF1.5x1.5x 2x 2.3x 3.1x 4.6x 6.2x 3.5x 5x 7x 9.7x 12x 13.9x 16.7x 55.6x
FL 645 6×6 6×7 6×9 6×12 6×17 6×24 4×5” 5×7“ 8×10” 11×14“ 14×17” 16×20“ 20×24” 40×80“
28mm17mm
35mm21mm 11mm
40mm 25mm
43mm 22mm
45mm28mm 20mm14.5mm 13mm
50mm 32mm25mm
55mm35mm 18mm
65mm 33mm 28mm21mm 18mm
75mm50mm 50mm 24mm 21mm 15mm
80mm 41mm
90mm 45mm 35mm28mm 20mm14.5mm 25mm 18mm
110mm 50mm 24mm 16mm
120mm75mm 50mm 19mm 35mm 18mm
150mm95mm95mm75mm 33mm24mm 42mm 30mm 21mm 15.5mm
200mm135mm 100mm 85mm65mm 43mm32mm 55mm 40mm 28mm 20mm 16mm 14mm 12mm
300mm200mm 150mm135mm95mm 65mm50mm 85mm 60mm 43mm 31mm 25mm 21mm 18mm
600mm400mm 300mm270mm190mm 130mm100mm 170mm 120mm 85mm 60mm 50mm 43mm 35mm
800mm500mm 400mm350mm260mm 175mm130mm 220mm 160mm 112mm 80mm 65mm 55mm 45mm 14mm
1000mm675mm 500mm425mm325mm215mm160mm 285mm 200mm 140mm 100mm 80mm 70mm 60mm 18mm
Ti1 8000 4000 2000 1000 500 256125 60 30 15 8 4 2 1” 1.5“-2”-3“ 4” 8“ 15”30“ 1min 2m4m8m15m30m1h2h
F 0.7 1 1.4 2 2.8 4 5.6 8 1116 22 32 45 64 90 128 181 206-256-288362512 724 1024 14482048
count 1 2 3 4 5 6 7 8 910 11 12 13 1415 16 17 18 19 20 21 22 2324252627282930

4x5 film price

  • Shanghai 4×5 25p iso 100: 15 sgd

Fast lens and DOF of Large Format

Manufacturers