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

Focal Length Millimeters (mm)

Required number input.

F Number

Required number input.

Circle Of Confusion Millimeters (mm)

Required number input.

Thin-lens hyperfocal distance H=f²/(N·c)+f from focal length, f-number and chosen circle of confusion. 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]

Hyperfocal Millimeters (mm)

The resulting hyperfocal millimeters returned as a number.

• Depth of field is a sharpness convention based on a selected circle of confusion, viewing size, distance, focal length, aperture, and focus distance. Diffraction, lens aberrations, sensor sampling, subject motion, and artistic tolerance are separate.
• 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.

• Depth Of Field

  Finite depth of field from focal length, f-number, circle of confusion and focus distance using thin-lens near/far limits.

• Depth Of Field Near Limit

  Thin-lens near depth-of-field limit Hs/[H+(s−f)] from hyperfocal distance, focus distance and focal length in matching units.

• Bellows Extension Factor

  Exposure factor caused by lens extension when the lens-to-film distance exceeds focal length: (extension/focal)².