Camera calculator · free in CineMath

Anamorphic Calculator

Desqueezed aspect ratio and horizontal-equivalent spherical focal length for any squeeze.

Anamorphic shows what a squeeze does to the frame: the recorded and desqueezed aspect ratios, the desqueezed image width, and the spherical focal length with the same horizontal view. Use it to check that a lens and sensor mode land on your delivery ratio before the camera test.

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Worked examples

Worked examples
SetupRecordedDesqueezed (exact, result line)H-equivalent lens
2× squeeze, 24.89 × 18.66 mm, 40 mm lens4:32.67:120 mm
2× squeeze, 20.22 × 16.95 mm (ALEXA 35 3.3K 6:5), 50 mm lens1.19:12.39:125 mm
1.8× squeeze, 24.89 × 18.66 mm, 75 mm lens4:32.40:142 mm
1.33× squeeze, 24.89 × 14.00 mm (16:9), 40 mm lens16:92.36:130 mm

What you enter

  • Squeeze ratio: 1.25, 1.33, 1.5, 1.8 or 2.0×, or a custom factor such as 1.65
  • Sensor width (mm), with presets 36, 24.89, 23.76, 22.3 and 17.3
  • Sensor height (mm), with presets 24, 18.66, 13.37, 14.9 and 13
  • Focal length (mm), with presets from 24 to 135

What you get

  • Recorded aspect ratio
  • Desqueezed aspect ratio, given to two decimals in the result line
  • Desqueezed width (mm)
  • Horizontal-equivalent spherical focal length, to the nearest millimeter
  • The formula with your numbers in it

How CineMath works it out

  • Desqueezed aspect = (sensor width × squeeze) ÷ sensor height
  • Desqueezed width = sensor width × squeeze
  • Horizontal-equivalent focal length = focal length ÷ squeeze
  • Only the horizontal is stretched: the vertical angle of view stays that of the marked focal length

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