Film Tools
Browse all available film tools.
Available tools
- 35mm Equivalent Focal Length 35 mm full-frame-equivalent focal length using the 36×24 mm diagonal divided by the camera sensor diagonal.
- 35mm Equivalent Focal Length Practice Create reproducible practice for 35mm Equivalent Focal Length from supplied scenarios, returning validated questions and computed answers under the source tool's assumptions and limits.
- Anarmorphic Desqueeze Display width in pixels after horizontal desqueeze of recorded anamorphic pixels by the supplied squeeze factor.
- Anarmorphic Desqueeze Practice Create reproducible practice for Anarmorphic Desqueeze from supplied scenarios, returning validated questions and computed answers under the source tool's assumptions and limits.
- Anarmorphic Squeeze Factor Horizontal anamorphic squeeze factor from unsqueezed scene width divided by recorded squeezed image width.
- Anarmorphic Squeeze Factor Practice Create reproducible practice for Anarmorphic Squeeze Factor from supplied scenarios, returning validated questions and computed answers under the source tool's assumptions and limits.
- Angle Of View Diagonal Diagonal angle of view for a rectilinear lens from sensor diagonal and focal length.
- Angle of View Diagonal Practice Create reproducible practice for Angle of View Diagonal from supplied scenarios, returning validated questions and computed answers under the source tool's assumptions and limits.
- Aperture From F Stop Entrance-pupil diameter from focal length divided by f-number; not the physical diaphragm diameter.
- Aperture from F Stop Practice Create reproducible practice for Aperture from F Stop from supplied scenarios, returning validated questions and computed answers under the source tool's assumptions and limits.
- Aspect Ratio Calculation Unreduced width-to-height aspect ratio for an image or screen measured in matching units.
- Aspect Ratio Calculation Practice Create reproducible practice for Aspect Ratio Calculation from supplied scenarios, returning validated questions and computed answers under the source tool's assumptions and limits.
- Aspect Ratio From Resolution Display width-to-height aspect ratio from integer pixel dimensions; does not simplify to a fraction.
- Aspect Ratio from Resolution Practice Create reproducible practice for Aspect Ratio from Resolution from supplied scenarios, returning validated questions and computed answers under the source tool's assumptions and limits.
- Bellows Exposure Compensation Additional exposure in stops from a measured bellows exposure factor: log₂(factor).
- Bellows Exposure Compensation Practice Create reproducible practice for Bellows Exposure Compensation from supplied scenarios, returning validated questions and computed answers under the source tool's assumptions and limits.
- Bellows Extension Factor Exposure factor caused by lens extension when the lens-to-film distance exceeds focal length: (extension/focal)².
- Bellows Extension Factor Practice Create reproducible practice for Bellows Extension Factor from supplied scenarios, returning validated questions and computed answers under the source tool's assumptions and limits.
- Bitrate From File Size Runtime Average decimal megabits per second from a decimal megabyte file size and duration; includes any audio/container overhead already in the size.
- Box Office Gross Per Screen Gross theatrical receipts per playing screen from a total gross and positive screen count.
- Box Office Gross Per Screen Practice Create reproducible practice for Box Office Gross Per Screen from supplied scenarios, returning validated questions and computed answers under the source tool's assumptions and limits.
- Box Office Per Capita Gross theatrical receipts per resident in the specified market and period; all gross inputs must use one currency.
- Box Office Per Capita Practice Create reproducible practice for Box Office Per Capita from supplied scenarios, returning validated questions and computed answers under the source tool's assumptions and limits.
- Changeover Cue Mark Calculator Recorded cue frame index from total frames minus independent qualified cue lead whole frames, indexed from0reel frame boundary. No universal changeover lead time or automatic projection instructions.
- Chroma Subsampling Bandwidth Uncompressed decimal MB/s for YCbCr with one luma sample and two chroma channels at a supplied per-channel chroma sample fraction (0.25 for 4:2:0, 0.5 for 4:2:2).
- Circle Of Confusion Conventional permissible circle-of-confusion diameter from sensor diagonal divided by a user-selected viewing divisor; not an optical constant.
- Circle of Confusion Practice Create reproducible practice for Circle of Confusion from supplied scenarios, returning validated questions and computed answers under the source tool's assumptions and limits.
- Color Correction Filter Factor Calculator Measured color correction filter exposure facto run filtered/filtered matched same channel/illumination, not ND2^stops or nominal filter color factors.
- Color Depth Bits Per Pixel Nominal uncompressed bits per pixel from equal bit depth per channel times sampled channel count.
- Color Depth Bits Per Pixel Practice Create reproducible practice for Color Depth Bits Per Pixel from supplied scenarios, returning validated questions and computed answers under the source tool's assumptions and limits.
- Color Temperature Kelvin To Mired Convert absolute color temperature in kelvin to reciprocal megakelvin (mired): 10⁶/K.
- Color Temperature Kelvin to Mired Practice Create reproducible practice for Color Temperature Kelvin to Mired from supplied scenarios, returning validated questions and computed answers under the source tool's assumptions and limits.
- Contrast Ratio Contrast ratio from measured maximum and minimum luminance under the same viewing conditions.
- CPL Duration Composition playlist timeline duration from frame count and edit rate, excluding any external pre-show content.
- Credits Scroll Speed Average vertical credits scroll speed from total traveled pixels and scroll duration.
- CRI Calculation Restricted CIE13.3generalCRI Ra=mean R1…R8from actual already independently chromatic adapted ΔEi(1964U*V*W*), Ri=100−4.6ΔEi. Does not compute spectral integration/adaptationfromSPDs, nofullCRIor light-safety certificate.
- Crop Factor Focal Length Equivalent field-of-view focal length from an actual focal length times a supplied crop factor.
- Cue Mark Position Calculator Actual already assigned cue frame index×independently gauge/per for at ion-qualified physical frame pitch filmpositionmm, not choose cue lead time or a universal35mmframepitch.
- Data Rate Compressed Compressed decimal MB/s estimate from uncompressed data rate divided by an assumed compression ratio.
- Data Rate Uncompressed Decimal megabytes per second for uncompressed constant-frame-rate raster video; excludes headers and audio.
- DCP Bitrate Average total DCP bitrate in decimal Mb/s from decimal gigabytes and running seconds.
- DCP File Size Decimal gigabytes for a DCP or other constant-bitrate file from total Mb/s and running seconds; excludes filesystem overhead.
- 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 Far Limit Calculator Thin lens farDOFlimitHs/[H−(s−f)], actual same units/fixed CoCmodel, finitebranchs−f<H. Infinity branch explicitly rejected not replaced finite value; near DOF is distinct.
- 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.
- Dynamic Range Stops Dynamic range in photographic stops from maximum usable signal divided by minimum usable signal.
- Exposure Compensation Exposure-setting change in stops from current EV to desired EV; positive compensation means more light and therefore a lower desired EV.
- Exposure Triangle EV ISO-adjusted exposure value referred to ISO 100: log₂[(N²/t)(100/ISO)].
- Exposure Value EV Exposure value at ISO 100, EV=log₂(N²/t), from f-number N and shutter time t in seconds.
- F Stop From Aperture F-number from lens focal length divided by entrance-pupil diameter.
- Feature Runtime With Trailers Program runtime from feature, trailer and intermission durations, all in minutes.
- Field Of View Angle Angle subtended by a scene width at a given camera-to-scene distance: 2atan(width/(2distance)).
- Field Of View From Focal Length Horizontal angle of view of a rectilinear lens from sensor width and focal length; excludes distortion.
- File Size From Bitrate Runtime Decimal megabyte file size from constant total bitrate in Mb/s and runtime in seconds.
- Film Frames Count Approximate exposed frame count from film footage times a specified gauge/perforation-dependent frames-per-foot value.
- Flash Exposure Calculator Nominal direct flash fnumberGN/d×√(ISO/ISOref), actual guide-number units/distance/reference independently established. Bounce/modifiers/nonuniform exposure external.
- Flash Sync Speed Calculator Maximum full-open mechanical sync reciprocalHz1/(actual curtain travel time+independent margin), not flashpulseHSS or guarantee artifact free timing.
- Flicker Frequency Flicker frequency from observed light-output cycles over a measured time interval.
- Flicker Percentage Percent flicker (modulation depth) as 100(max−min)/(max+min) from nonnegative light-output extrema.
- Focal Length From Field Of View Focal length from sensor width and horizontal angle of view under a rectilinear thin-lens model.
- Footage To Runtime Film runtime from footage, gauge-specific frames per foot and projection frame rate.
- Frame Rate To Shutter Speed 180-degree shutter convention: exposure duration is half a frame period, 1/(2·fps).
- Global Shutter Readout Calculator Actual global-shutter stored frame pixel transfer duration count/observed throughput, not simultaneous exposure time or row-by-row rolling readout skew.
- Guide Number Aperture Flash f-number from guide number divided by flash-to-subject distance, at the guide number's ISO and flash setting.
- Guide Number Distance Maximum flash-to-subject distance from guide number divided by f-number, at the guide number's ISO and flash setting.
- Hyperfocal Distance Thin-lens hyperfocal distance H=f²/(N·c)+f from focal length, f-number and chosen circle of confusion.
- Hyperfocal Near Limit Near focus limit when focused at hyperfocal distance: H²/(2H−f), close to H/2 for H≫f.
- Intermission Time Intermission duration from the program-minute offset at pause and at resumption.
- ISO Gain dB Analog-equivalent ISO gain change in decibels as 20 log₁₀(target ISO/base ISO); a doubling corresponds to about 6.02 dB.
- KDM Validity Window Calculator Declared half-openKDMnotBefore≤t<notAftertimeauditONLY, not signature/decryption/certchain/playback authorization; not inclusiveX509validity semantics. Time zone/interval convention independently verified.
- Keystone Correction Angle Calculator Declared planar trapezoid SIDE wall angle from signed(top width−bottom width)/(2height), not infer projector tilt/lens geometry or actual correctivehomography.
- Lens Shift Percentage Vertical lens shift as optical-axis offset divided by projected image height, expressed as a signed percentage.
- Luminance Nits Directional luminance in nits (cd/m²) from luminous intensity in candelas divided by projected emitting area.
- Magnification Ratio Linear image magnification from image size divided by object size in matching length units.
- Mired To Kelvin Convert reciprocal megakelvin (mired) to absolute color temperature: 10⁶/mired.
- Motion Blur Shutter Angle Shutter angle needed for a target moving-object blur length, from image speed in pixels per second and frame rate.
- ND Filter Factor Neutral-density filter factor from attenuation in stops: factor=2^stops.
- ND Filter Stops Neutral-density attenuation in stops from a stated optical filter factor; factor 2 is one stop.
- Open Gate Resolution Calculator Actual full sensor open-gate photo site matrix/bin ned output dimensions, instead of aspect ratio. No fabricated camera model resolution, active pixel mask/demosaic or codec output.
- Pixel Count Total Total image pixels from integer width and height; rejects products above JavaScript's exact safe-integer range.
- Pixel Density PPI Pixel density from pixel count across a display dimension divided by that dimension in inches.
- Print Cost Total Total cost of physical release prints from a per-print price and print count; excludes shipping and taxes.
- Print Size From Resolution Physical print width in inches from image pixel width and chosen print resolution in dots/pixels per inch.
- Projector Screen Width Projected image width from lens-to-screen throw distance divided by lens throw ratio.
- Projector Throw Distance Projection throw distance from image width times a specified lens throw ratio.
- Projector Throw Ratio Projector throw ratio as lens-to-screen distance divided by projected image width in matching units.
- Reel Length 2000 ft Metric length of film loaded onto a nominal 2,000-foot reel at the supplied fill fraction; full reel is 609.6 m.
- Reel Runtime 2000 ft Runtime of a nominal 2,000-foot reel from gauge-dependent frames per foot and projection frame rate.
- Reproduction Ratio Macro reproduction ratio as image size on sensor divided by actual subject size; 1 means life size (1:1).
- Resolution From Aspect Ratio Rounded integer pixel width required for a given height and positive width-to-height aspect ratio.
- Rolling Shutter Readout Time Total row-by-row sensor readout time from active row count and time per line.
- Rolling Shutter Skew Pixels Horizontal rolling-shutter displacement of an object moving at constant image speed during full sensor readout.
- Runtime To Footage Film footage needed for a runtime at a specified frame rate and gauge-dependent frames-per-foot value.
- Scan Resolution DPI Effective scan resolution in pixels per inch from output pixel width and source width in inches.
- Scope Crop Factor Fraction of source image height retained when cropping to a wider target aspect ratio at unchanged width.
- Screen Brightness Foot Lamberts Approximate projected screen brightness in foot-lamberts from incident projector lumens, screen gain and screen area in square feet.
- Screen Count Required Minimum whole screens needed to meet a target gross under a supplied average gross per screen.
- Screen Gain Relative screen gain as measured screen luminance divided by reference matte-white luminance under the same illumination.
- Shutter Angle To Shutter Speed Exposure duration from rotary shutter angle and frame rate: t=angle/(360·fps); valid for a 0–360° shutter.
- Shutter Efficiency Measured shutter efficiency percentage from actual open time divided by commanded exposure time.
- Shutter Speed To Shutter Angle Rotary shutter angle from exposure duration and frame rate: angle=360·fps·t; rejects exposure longer than a frame.
- SSI Calculation Qualified caller-reference retrieval for SSI Calculation. Actual independently applicable actual SMPTEST2122SSI edition, wavelength sampling/normalization/weights and independently computed validated spectral-score reference. Does not compute an omitted physical/predictive/design model or supply authoritative standards, coefficients, norms. Examples are illustrative. Evidence truth/applicability externally verified; no diagnosis, safe-use approval, code/legal compliance or guaranteed forecast.
- Subtitle Characters Per Second Subtitle reading load as visible character count divided by the subtitle's on-screen duration.
- Subtitle Line Length Calculator Plain text subtitle perlineUnicodecodepointcounts, spaces included, CRLF normalized. Not grapheme/display column width, text shaping, HTML mark up decoding or reading-speed/caption standard compliance.
- Subtitle Reading Speed Subtitle reading speed in words per minute from displayed word count and on-screen duration.
- Super16 Crop Factor Calculator Actual Super16 active image DIAGONAL crop factor versus independent reference diagonal, same units. No universally fixed gate dimensions, field height fraction or lens factor prescribed.
- Super35 Crop Factor Calculator Actual Super35 active image DIAGONAL crop factor versus independent reference diagonal, same units. No universally fixed gate dimensions, field height fraction or lens factor prescribed.
- Theatrical Window Days Calculator Actual dated theatrical distribution window elapsed civil days, not legally required minimum/contract rights or actual availability.
- TLCI Calculation Qualified caller-reference retrieval for TLCI Calculation. Actual independently applicable actual EBU Tech3355/3355s TLCI method version, camera/color pipeline/spectra and independently computed validated score/reference. Does not compute an omitted physical/predictive/design model or supply authoritative standards, coefficients, norms. Examples are illustrative. Evidence truth/applicability externally verified; no diagnosis, safe-use approval, code/legal compliance or guaranteed forecast.
- Trailer Runtime Total Total trailer runtime estimated from trailer count and mean trailer duration; excludes feature and intermission.
- White Balance Gain Calculator Actual neutral patch inverse LINEARRGB channel gains relative independent reference, same exposure/black level corrected. Not gammaRGB, color-temperature estimation or sensor-colorimetry/white balance pipeline.