Directing and cinematography

Shot design, lenses, camera movement, lighting, composition, blocking and continuity

• articleWhat is Apple Log, how do developers select it, and how does an editor such as Final Cut Pro handle Apple Log footage?
  Apple Log is an AVFoundation capture colour space with BT.2020 primaries and an Apple-defined log transfer (iOS 17.0+); Apple Log 2 uses Apple Gamut primaries (iOS 26.0+) and, when active, deactivates other outputs on the same session. Final Cut Pro offers Camera LUT choices that convert Apple Log and Apple Log 2 to Rec. 709 with Apple 3D LUTs, or None to turn log processing off.
• articleFrom footage of a test chart, what can an agent measure (sharpness, tone response, noise, dynamic range) and what prerequisites do open test documents imply?
  From chart footage an agent can estimate SFR and per-patch SNR only after linearising the tone response (gamma), avoiding clipped edges and handling edge angle; log encoding, sharpening, noise reduction and heavy compression break linear-model assumptions, so video-camera measurements need the non-linear treatment or must be labelled as approximate. No cinema/video-codec-specific method was found in these sources.
• articleWhat is ISO 12233, what does its public scope say it covers, and what does the slanted-edge test actually do?
  ISO 12233:2017 (now withdrawn, replaced by ISO 12233:2024 per the ISO page snapshot) covers resolution and SFR measurement for electronic still cameras; the edge-based e-SFR method (in the standard since 2000) takes an edge profile, differentiates, windows and Fourier-transforms it, normalised to unity at zero frequency; the 2017 chart's 4:1 contrast edges are less likely to clip than the old chart's.
• articleWhat does an ASC MHL offload record and not record about camera files, what happens when files are renamed or sidecars appear, and which keys do dailies tools then use to join metadata?
  ASC MHL records per-file hash records (with optional list-level custom metadata) and has no timecode or reel field (curator text search), so clip identity for editorial lives in the files or the ALE/dailies layer; a rename keeps its history only when recorded with ASC MHL Rename (previousPath), otherwise verification fails and the file is likely registered as new; mutable sidecars such as RED .RMD may be ignored, and ignored files cannot be un-ignored within a history. Separately, Silverstack warns that ALE and MXF tape names must match for merge or relink.
• articleWhat do practitioners state about handing a sequence from storyboards to previs to the live shoot, and what do they say is lost or changed at each handoff?
  Practitioners on large VFX productions describe building an animatic from storyboards and script, then techvis to validate camera moves, placement and lenses; on set, operators and DPs went beyond the previs; producers find cut-in storyboards hard to read for feel, keyframed previs cameras feel mechanical, plate eyelines and camera motion force recomposition in postvis, and many postvis shot ideas come from director reviews.
• articleWhat does a Korean-language press account report about a director who draws the full storyboard (conti) before shooting, and what does it say that practice buys on set?
  A 2019 Korean press report says the director draws his own storyboards (since his first feature) with camera angle, movement lines, background and even handheld feel, says he will not go to set without one, and relays the DP's credit of a nearly 1,000-cut storyboard for finishing Parasite in 77 shooting sessions; the article links the planning to fewer on-set trials and to keeping the standard labour contract. Causation is the journalist's and DP's attribution, not measured.
• articleIs a call sheet the same as a daily production report, and do public agencies publish production-report templates with field definitions?
  Call sheets and production reports are different documents for tax-credit evidence: New York requires the daily production report (front and back) summarising each day and refuses call sheets as substitutes; California requires a UPM-signed call sheet for the first day of principal photography and UPM-signed production reports for every day, submittable weekly in arrears. Neither lists the report's fields.
• articleWhat do directors, actors and a cinematographer say first-hand about how performance changes with shot size, lens and coverage, with concrete examples?
  Directors and actors describe close-ups as performance tools, not a size rule: Demme shot super-tight close-ups looking over and into the lens with tight over-the-shoulders to move in and out of a character's point of view; Attias wants each shot specific rather than enlarging one wide frame, including a deliberate wide-angle close-up; Glenn Close says a well-made close-up keeps the audience emotionally involved and that silence can carry a scene on film.
• articleIs there an open-licensed, institutionally published course source that documents how a photography teacher sequences exposure, light and selection decisions, and what can an agent honestly cite from it?
  MIT OCW 4.A21 (2006, CC BY-NC-SA 4.0) teaches exposure by repetition: photograph the same scene at many aperture, shutter and white-balance settings while noting each, compare them on screen, and select the best 5 of 20; it treats light as one of three qualities of a good photograph. A thin teaching routine without worked decision examples.
• articleWhat technical remedies for darker-skin rendering (film stock, reference charts, camera design, lighting) does Roth report, by name?
  Roth reports remedies: Kodak VeriColor III (early 1980s) and Gold Max with wider skin-tone accommodation, multiracial reference images (a Getty image as an example), and Philips' LDK studio camera redesign for skin colour variation; these are her reported judgments, not tested comparisons.
• articleWhat is the Shirley card and what does Lorna Roth's 2009 article say about film stock and skin-tone bias, in her own words?
  Roth (2009) argues that colour film emulsions and camera design were tuned to light skin, with reference cards (Shirley, China Girl, BBC flesh-tone cards) as the norm, and reports from Kodak interviews that complaints about brown objects such as chocolate pushed wider tonal range; users compensated with lighting and make-up.
• articleDo top cinematographers measure camera distance or camera height, or choose by feel, and how do distance and focal length trade off?
  Roger Deakins says he does not measure camera distance or height except to match shots and picks lenses by shot size and feel, often shooting an over-the-shoulder on 32-35mm and a closer shot on 40-50mm while stating he has no rule; a forum moderator who signs as an ASC member notes the same framing can sit three or five feet away depending on lens, and that pushing in instead of going longer can force the actor to look at the lens edge rather than the other actor.
• articleWhat does an external lens calibration file for FreeD look like, and how does it compare with Unreal's Lens File model?
  Ventuz's lens file keys OpenCV calibration points by the FreeD zoom value and allows up to 14 OpenCV distortion coefficients (k1-k6, s1-s4, Tx, Ty; missing ones taken as 0), while Unreal's Lens File keys five Brown-Conrady parameters by focus and zoom; the files describe different models and cannot be swapped directly (conversion would need refitting or truncation).
• articleWhat does an Unreal Engine Lens File store, what inputs does it need to be calibrated, and how is it evaluated at runtime?
  Unreal's Lens File stores five Brown-Conrady distortion parameters (K1, K2, P1, P2, K3), camera intrinsics and nodal point offsets keyed by focus and zoom, interpolated between calibrated points; Epic says to make a new Lens File for each lens and camera body combination.
• articleWhich continuity and report documents do script-supervision job descriptions and training outlines say go to editorial, production, camera and VFX, and where do they disagree?
  Script supervisor paperwork serves two audiences: editorial (marked-up/lined script pages, editor's daily log, facing pages, selects or print log, VFX notes) and production (timings and page counts for progress reporting). ScreenSkills assigns these to the supervisor; IATSE Local 634 gives the editor's lined script and page recalculation to the script assistant. No source publishes field-level templates.
• articleWhat reasons do cinematographers give first-hand when they commit to one focal length (or a narrow lens set) for a whole project, and where do secondary retellings go beyond what they said?
  Cinematographers give different practical reasons for shooting a whole film on one focal length: Lewis (Adolescence, 32mm on a gimbal) balanced hiding rigging and booms against disorienting movement; Mukdeeprom (Call Me By Your Name, 35mm) wanted close-ups and characters in their surroundings from one lens; Suschitzky used a single 21, 24 or 27mm per film with Cronenberg. These are first-person accounts, not rules.
• articleWhat do working cinematographers say about exposing for HDR when a proper on-set HDR monitor is not available, and where do they disagree?
  Cinematographers writing in 2016-2018 agree that meters and exposure knowledge still matter in HDR but split on how much practice changes: some say to expose as for film with testing and an ACES pipeline ("use a meter ... read shadows, read highlights"), others say highlights need deliberate placement, HDR should be monitored with periodic SDR checks and a spot meter is the fallback without a monitor, and an ASC paper recommends an on-set HDR reference monitor with a waveform that validates rather than replaces exposure readings. These are practitioner accounts that pre-date current LED-volume workflows.
• articleHow do I read a Kodak or Fujifilm camera-negative datasheet: what do the characteristic curve, spectral sensitivity and dye curves show, and under which conditions were they measured?
  Kodak's VISION3 500T sheet gives exposure indexes of 500 (tungsten) and 320 (daylight with an 85 filter) and warns that its curves are representative of production coatings, not specifications. Kodak plots log exposure in lux-seconds (the 2015 sheet also states ECN-2 processing and Status M densitometry in its text; the 2022 text layer does not), while Fujifilm's ETERNA manual plots against camera stops with Status M densities, so the two makers' curves cannot be overlaid without converting the exposure axis.
• articleWhat do ARRI's look-file documents say an ALF2, ALF4 and ALF4c contain, how the look travels with clips, and what does not carry over?
  ARRI's ALF2 look files bundle creative intent with a display conversion, whereas ALF4 (ALEXA 35/265) is log-to-log: optional ASC CDL plus a Creative Modification Transform, with the display transform applied downstream; ALF4c carries custom display transforms and leaves colour management to the user. Looks travel in each clip's header, so transcoding loses them (link rather than import in Avid); spatial tools cannot live in a 3D LUT; and LogC3 LUTs cannot be converted to LogC4, so looks must be recreated. The 2016 note that ALF2 needs Resolve Studio is dated.
• articleWhat is the difference between scene-referred log footage and display-referred Rec.709 video?
  ARRI Log C stores relative scene exposure, logarithmic in stops (about 78 10-bit code values per stop), and ARRI describes two ways to display it: the camera's tone-mapping or a linear conversion with display correction, where values above 1.0 may clip. Rec.709 video is adjusted so the picture looks right on a BT.1886 reference monitor (EOTF exponent 2.404) in a BT.2035 environment. Both can sit in the same pixel container, so treat a file as log or as display video according to its signal metadata or documentation, not by appearance. H.273 code 2 means the transfer characteristics are unspecified and left to the application. The words scene-referred and display-referred are not used in these texts; they are convenient shorthand for ARRI's scene exposure versus BT.709's viewed picture (F1, confirmed by curator search).
• articleWhat do colourists themselves say about grading skin tones (when to use scopes, balance-first or skin-first, warm or accurate), and where do they disagree?
  Colourists quoted in a 2017 bachelor thesis do not share one method for skin: one grades the base for skin when a face fills most of the frame and grades the rest first with skin in a secondary on wide shots; vectorscope skin-line use ranges from habitual early in a career to final passes only; stated preferences range from slightly warm to plain accuracy without colour contamination. An interviewed colourist describes a scene where skin and walls were all beige and the work was separating them. The thesis is secondary evidence of what each said (questionnaires cited as personal communication; one quote from a 2016 publication).
• articleHow do HDR guides say exposure and lighting decisions change (or not) compared with SDR, and what do the PQ numbers imply for scopes and nit targets?
  Practitioner guidance conflicts: ARRI says HDR exposure and lighting need not differ in general (watch clipped highlights, bright practicals, noise) and that there is no consensus on grading HDR or SDR first; Messerschmidt (ASC) treats HDR as a different format and places practicals at about 300-400 nits with a background window at 800 nits on the display. Netflix adds that light-meter ratios and scope readings need reinterpretation (producer reading).
• articleWhat do ARRI, Netflix, Sony and a working cinematographer say about whether and how to monitor HDR on set?
  Netflix (as archived 2025-01-23) encourages but does not require HDR monitoring on set, warns that 'Bright SDR' monitors marketed as HDR-capable are unsuitable, and asks that monitors and LUT boxes support at least 33-point 3D LUTs; ARRI recommends HDR monitoring with a true HDR monitor to catch HDR-only problems early.
• articleWhat does the Hollywood Industry-Wide Labor-Management Safety Committee's portable-power bulletin say lighting crews must do on set, and how binding is it?
  CSATF Bulletin #23 (2013, recommended guidelines, not law) says only authorised employees connect or operate distribution, rig de-energised and check for shorts before energising, connect grounds, neutrals then phases (reverse to disconnect), avoid tie-ins to energised premises power (qualified person required), never use alligator clips, and use GFCI protection for non-double-insulated tools on construction sites.
• articleHow are creative looks carried from set to post under ACES (Look Transforms, AMF, CDL plus LUT), and what do the ACES docs say is not portable?
  ACES Look Transforms are whole-image ACES-to-ACES transforms carried as ordered Transform IDs in the ACES Metadata File; CDL values chosen under an LMT are invalid without it; non-ACES looks/LUTs are hard to translate (rebuild them in ACES); archive original ACES files plus grading data, the ordered LMTs and the ODT. 'Well-designed LMTs are interchangeable' is a stated design aim, not a test result.
• articleWhat does an ASC CDL carry (SOP + saturation, .cc/.ccc/.cdl) and how do tools differ in applying it from set to post?
  An ASC CDL is ten numbers (slope, offset, power per channel plus saturation); the v1.2 math clamps to [0,1], but many applications omit clamping, so CLF defines clamped and no-clamp styles and OCIO defaults to no-clamp; the same CDL can therefore render differently across tools, and a CDL names no colour space (ACES AMF adds a cdlWorkingSpace, per producer reading).
• articleHow do practitioners and guild descriptions say blocking, screen direction and coverage are tracked, and why do they deliberately cross the line?
  A guild job description assigns the script supervisor to assist during blocking, record action, positions, angles and coverage, and send a lined script to editorial daily; practitioner reports describe deliberate line-crossing for effect (Libatique and Aronofsky using the two sides of the line to mark a tonal shift in Requiem for a Dream). No primary DGA/ASC source on floor plans or overhead diagrams was found.
• articleWhich parts of an IES file do Blender, Unity and Unreal actually read, ignore or reject when used for virtual lighting?
  The parsers differ in tolerance: Blender v5.2.2 skips TILT=INCLUDE tables (never applying tilt), ignores lumens and units, accepts types A/B/C, mirrors missing quadrants ('much more forgiving than the spec') and converts candela with a fixed 4*pi/177.83 factor; Unity recognises versions from IESNA91 to IES:LM-63-2019 but rejects any TILT other than NONE; Unreal documents candela brightness and clipping of profiles to the spot cone.
• articleWhat do IES and EULUMDAT files describe, and which of them do Blender, Unreal Engine and Unity accept as a light profile?
  IES (LM-63) and EULUMDAT (.ldt) both tabulate luminaire intensity by direction, but the Blender, Unreal and Unity HDRP documentation and the Unity and Blender importer code read handle IES only (Unity registers only the .ies extension; Blender parses from the IES TILT line); no inspected source mentions EULUMDAT, so .ldt files need external conversion.
• articleHow do the intensity units, normalisation and symmetry rules differ between IES (LM-63) and EULUMDAT files, so values are not mis-scaled?
  EULUMDAT stores relative intensity (cd per 1000 lm) with a conversion factor and luminaire flux, and only the symmetric C-plane portion indicated by Isym; public tables differ on whether type indicator 0 exists (AGi32 lists 0-3, DIALux 1-3). IES stores candela scaled by a multiplier and ballast factors; Unity treats negative lumens-per-lamp as absolute photometry and clamps negative multipliers to 0, while Blender discards lumens-per-lamp and applies a fixed candela-to-watt factor. Copying values between formats needs an explicit flux/1000 scale.
• articleHow do depth-of-field and hyperfocal-distance calculators differ in their assumptions (circle of confusion, hyperfocal definition), and what does ZEISS say?
  ZEISS uses z = D/1500 (0.029 mm for 24x36) in its charts, gives hyperfocal approximately f'^2/(z'k) and treats the circle of confusion as a format property; a secondary source records a second hyperfocal definition differing by one focal length (H = f^2/(Nc) + f) and calls the 'Zeiss formula' D/1730 apocryphal. CoC choice and the +f term shift results: for 50 mm at f/2.8 on full frame, 35.8 m (0.025 mm, +f), 31.0 m (ZEISS D/1500) and 29.8 m (0.03 mm, +f), recomputed by the curator.
• articleWhat does an ASC-published first-hand test report say about evaluating exposure and colour on an LED wall, including metering and camera sync?
  A first-hand ASC test of Kodak film and an Alexa 35 against an LED wall (D65 native, content at 3200 K and 5600 K) reports that light meters misread narrow-band LED light so a digital camera and calibrated monitor stay necessary, that wall colour must be calibrated to the shooting camera's colour matrix, and that cameras must sync to panel refresh (genlock for digital; a sync box for film).
• articleWhat do Canon's white papers define for Canon Log, Canon Log 2, Canon Log 3 and Cinema Gamut, and which curve do they recommend for ACES?
  Canon's 2018 white paper gives Canon Log, Log 2 and Log 3 formulas only as images; the curator's recomputation reproduces every 10-bit code in its table (inputs in scene linear, with reflection = 0.9 x scene linear) and confirms Canon Log 3's linear segment joins its log branches. Canon recommends Log 2 with Cinema Gamut for ACES where all curves exist, calls Log 3 the successor to Canon Log (it matches Canon Log at 0% and 20%), and its 2014 paper describes Cinema Gamut only qualitatively.
• articleWhat exactly do Panasonic's V-Log and V-Gamut reference define (curve constants, primaries, matrices)?
  Panasonic's V-Log is 5.6x+0.125 below 0.01 and 0.241514*log10(x+0.00873)+0.598206 above, which the curator's recomputation matches to the published 10-bit codes 128/433/602; V-Gamut primaries are R (0.730, 0.280), G (0.165, 0.840), B (0.100, -0.030) with D65 white, and the manual gives XYZ, BT.709 and ACES conversion matrices and Varicam clip levels.
• articleWhat are Sony's published S-Log3 encode/decode formulas and code values, and how do S-Gamut3 and S-Gamut3.Cine differ in intent?
  Sony's S-Log3 encodes scene-linear reflection as (420 + 261.5*log10((x+0.01)/0.19))/1023 above 0.01125 with a linear toe below; the curator's recomputation reproduces the published 10-bit codes 95/420/598 for 0/18/90 percent reflection and confirms continuity at the breakpoint. S-Log3 is full range; S-Gamut3.Cine is slightly wider than DCI-P3 and S-Gamut3 near camera native and suited to ACES and BT.2020. Numeric primaries are not in the PDF's text.
• articleHow does an open storyboard tool number boards and shots (1A, 1B...), and how does it derive a shot list with camera setups from boards?
  Storyboarder (master 8b81a25c, package 3.0.0) generates shot labels as shot number plus sub-shot letter, restarting at newShot boards (first board always opens a shot), or '<n>A' per board when no flags are set; its shot-list model groups cameras into setups when roll/rotation/tilt differ by less than 60 degrees and x/y/z by less than 6 scene units. Correction to the candidate: the setup numbers produced by getCameraSetups are assigned from a counter reset for every board, so different setups on different boards can share number 1 (code inference, unexecuted); the grouping is real but the numbering is not a stable setup index.
• articleWhere does middle grey (18%) land in LogC4 and Log3G10, and does the exposure index change the curve?
  ARRI's LogC4 spec (2025-01-23) states the curve is independent of the selected EI and maps 18% scene linear to code value 0.2784; RED's Log3G10 places 18% grey at 1/3 and reaches 1.0 at 10 stops above grey (184.32). Curator arithmetic from the published constants reproduces 0.278396, 0.333333 and 0.999999.
• articleWhat does an openly licensed worked example look like that turns a short written scene into numbered storyboard panels, with each panel mapped to a line of the scene and a stated reason for the shot?
  The WikiU Film School lesson on Wikiversity (page revision 2146020, 2020-04-29) gives a complete short scene, "Seduced by the Dark Side!" (nine short prose paragraphs, revision 1878977 of Template:Origscript), and one storyboard of it in 14 numbered panels. Each panel carries a transition or move label (Fade In, Dolly In, Pedestal Down, Dolly Left, Cut To), the dialogue line or stage direction it covers, and for panels 1-13 a first-person note saying what the author wants (for example wide lens for emotional distance, 85 mm then 135 mm for warmth). The text is stated CC BY-SA; the panel drawings are separately licensed (mostly CC BY-SA 2.5, some GFDL, one listed public domain). It is a teaching example by the course author: nothing was measured, and the drawings themselves were not inspected here.
• articleWhy does hiding the threat (darkness, obscurity, withheld information) make horror scarier, and is that measured or craft lore?
  Three openly readable craft texts (Burke 1757, Radcliffe 1826, Lovecraft) argue that fear rests on the unseen or the unknown, and Radcliffe adds a useful limit: obscurity must leave the imagination something to work with, while confusion does not. The only measured support found is indirect: a non-film shock-learning experiment where stress responses peaked at maximal uncertainty. No open-access study was found that tests darkness or monster-reveal timing in a film, so those claims remain craft lore.
• articleWhat are the documented ways a recurring image or symbol goes wrong (heavy-handed, decorative, unconnected, monotonous)?
  Four failure modes are documented in the sources read: (1) decorative repetition that adds no meaning (Freeburg on the Zorro sword drawing); (2) repetition with no clear link to the theme (Freeburg on the Intolerance cradle); (3) a symbol that forces decoding in a way that competes with the story (Freeburg on symbolic sub-title motions); (4) a recurring element that hardens into a symbol and obstructs the reader (Forster's Galsworthy spaniel). A fifth, monotony from repeating one set-up, comes from a cinematographer's account (two or three repeats, then boring). "Unreadable motif" is not directly documented here.
• articleWhen an image recurs in a story to carry a theme, should it return unchanged or varied?
  Two period craft sources agree that a recurring image works when it returns with variation and fails when it is only repeated: Freeburg (1923) says each repetition should vary in approach or circumstance, and Forster (1927) defines the effect as "repetition plus variation". Freeburg's documented example is the Z mark in The Mark of Zorro (scar, bulletin board, neck, brow; sword motion in later ones); a cinematographer's 2025 account describes red intensifying across a thriller. Inversion (an image returning with opposite meaning) is not named in any passage read.
• articleWhat does "visual motif" mean in film and literature, and how is a motif different from a symbol or a theme?
  The openly readable sources use "motif" in three scopes: a composition that recurs across many works (Phillips et al. 2024, Garin & Elduque 2016), a picture that recurs inside one film (Freeburg 1923: the wagon train in The Covered Wagon; Forster 1927: the recurring phrase in a novel), and a repeated shape inside one frame (Freeburg's "echoing motifs"). None of them equates a motif with a theme: Freeburg ties emphasis to what is vital in the theme, and Forster separates a fixed "banner" from developing "rhythm". A beginner agent should state which scope it means before it tracks anything.
• articleWhat do sunrise, sunset, civil/nautical/astronomical twilight, golden hour and blue hour mean, and which of these have official definitions?
  The U.S. Naval Observatory defines sunrise/sunset as the Sun's centre 90.8333 degrees zenith distance (about 50 arcminutes below the horizon: 16 arcminute radius plus 34 refraction) and civil, nautical and astronomical twilight as the Sun's centre 6, 12 and 18 degrees below the horizon. 'Golden hour', 'blue hour' and 'magic hour' have no official definition: the Photographer's Ephemeris compares five apps with golden hour ranging from -4 to +6, 0 to +6 and 0 to +10 degrees of solar elevation, and the SunCalc library sets its evening 'goldenHour' at 6 degrees elevation. A cinematographer's clarification quoted there describes magic hour as the time after direct sun is gone but the sky is bright, close to civil twilight.
• articleWhat did Wertheimer (1923) actually list as grouping factors, and how far do they transfer to layout design?
  Wertheimer's 1923 paper (Ellis's 1938 English translation, openly readable on Classics in the History of Psychology) names factors of proximity, similarity, uniform destiny (common fate), direction, closure/good curve, objective set and past experience, demonstrated with dots and lines. The common design-textbook list ("proximity, similarity, closure, continuity, common fate") is a later condensation: in the text read, closure is stated not to be always dominant, similarity is called a special case of the good Gestalt, and no layout or interface example appears. Use it as a source of grouping hypotheses to test, not as proven layout laws.
• articleWhere does the "rule of thirds" come from, and what did J. T. Smith actually write in 1797?
  The phrase "Rule of thirds" appears, in quotation marks and with an apology for coining it, in J. T. Smith's 1797 Remarks on Rural Scenery. In the 1797 text it is a rule about proportions of light and shade and of areas (sky vs. earth/water, about 2:1), not a grid of four intersection points. Smith presents it as his own observation, derived by analogy from an observation about Rembrandt-type pictures, and invites correction; the OCR text read does not contain "golden".
• articleWhat did a working filmmaker say about using Noh's three-part form for screenplay structure, and what limits did he put on it?
  A celebrated director's 1975 advice to young filmmakers (known in English through a 1983 adaptation, read here on a blog) offers the symphony or the Noh three-part jo-ha-kyu as models for a screenplay, but says the symphonic structure is easiest for audiences today; he also cites Zeami's 'detached gaze' for watching actors. The glosses 'destruction' and 'haste' come from the translation as reproduced and differ from glossary definitions of johakyu as a three-segment theory of structure, performance and speed. No worked example maps it onto a film.
• articleDo the Panasonic AW-UE100 and AW-UE160 public documents describe FreeD output field mappings and Camera ID the same way as the AW-UE150 manual?
  Panasonic's interface specifications for AW-UE150/HE145 (2022), AW-UE100 (2022, producer) and AW-UE160 (2025) list a settable Camera ID command (OSJ:F4) under tracking-data output, while the AW-UE150 operating manual (2025) says the FreeD Type D1 Camera ID field 'Always stores FFh'; the vendor documents conflict on whether Camera ID is configurable. None of the UE100/UE160 documents read gives a field-by-field FreeD mapping.
• articleHow do storyboards mark camera moves (arrows, zoom lines, labels), and where do sources disagree on move names like truck, track and dolly?
  'Truck' is used for Z-axis motion by Toon Boom Storyboard Pro 24 docs, for lateral motion by the IIT Bombay D'source course (archived 2025-03-18), and for following action generally by Penn State Media Commons; no single usage is shared across these sources.
• articleWhich Kodak documents say Status M densitometry is used for ECN-2 materials and LAD, and do they define how it relates to other density encodings or to a specific datasheet edition?
  Kodak H-61A gives the camera-negative LAD standard patch nominal Status M densities of 0.80 R, 1.20 G, 1.60 B; this lab-control LAD is a different context from H-387's digital-recorder printing-density LAD (CV 685), and neither document converts between the two.
• articleDo the S-Log3, V-Log and Canon Log 2/Log 3 constants in the manufacturers' documents match those in OpenColorIO's built-in camera transforms and the ACES CTL colourspace transforms, and where do the implementations add something the documents do not say?
  At OCIO 10a43ec1 and ACES aces-input-and-colorspaces 29b722bc, the S-Log3 (261.5, 420, 0.01125, 171.2102946929), V-Log (0.01, 0.00873, 0.241514, 0.598206) and Canon Log 2 (0.24136077, 0.092864125, 87.099375, x0.9 scaling) literals are present as reported; the ACES V-Log CTL carries the explicit linear segment (5.6, 0.125, cut 0.181) that the OCIO Panasonic parameter list read does not spell out.

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