Use this cinematography or projection calculation to plan image geometry, exposure, timing, storage, film footage, or presentation from explicitly stated camera and display parameters.

Filter Factor

Required number input.

Neutral-density attenuation in stops from a stated optical filter factor; factor 2 is one stop. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Attenuation Stops (stops)

The resulting attenuation stops returned as a number.

• Exposure arithmetic assumes calibrated ISO, aperture, shutter, flash guide number, and filter density conventions. Lens transmission, reciprocity failure, bellows factors, flash zoom, ambient balance, metering bias, and clipping can alter the practical setting.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Confirm critical values with the actual camera, lens, codec, projector, and delivery specification, then run a camera or projection test under representative conditions.

• ND Filter Factor

  Neutral-density filter factor from attenuation in stops: factor=2^stops.

• Bellows Exposure Compensation

  Additional exposure in stops from a measured bellows exposure factor: log₂(factor).

• Anarmorphic Desqueeze

  Display width in pixels after horizontal desqueeze of recorded anamorphic pixels by the supplied squeeze factor.