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

Attenuation Stops (stops)

Required number input.

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

Filter Factor

The resulting filter factor 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 Stops

  Neutral-density attenuation in stops from a stated optical filter factor; factor 2 is one stop.

• 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.