Alexa 35 Tech
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ARRI Alexa 35 Workflow Guide
Analysis of the next-gen Super 35 sensor. 17 stops of dynamic range, REVEAL Color Science, LogC4 architecture, and ARRI Textures.
17 Stops Dynamic Range (ALEV 4)
The Alexa 35 adds 2.5 stops of latitude over the previous generation (+1.5 in highlights, +1.0 in shadows). It includes the new ESM (Enhanced Sensitivity Mode).
Dynamic Range Distribution (17 Stops)
■ EI 400 (Extreme Density)
7 stops above grey and 10 stops below. Shadows are virtually noise-free. Perfect for VFX, green screen, and high-contrast dark scenes.
▶ EI 800 (Base ISO ARRI)
The standard. Offers 8 stops above grey (half a stop more than Alexa LF) and 9 stops below. The best highlight roll-off on the market.
▲ EI 3200 ESM (Enhanced Sensitivity)
From ISO 2560, ESM engages: on-sensor temporal noise reduction making EI 3200 highly usable on cinematic sets without post-denoise.
ARRI Textures (In-Camera)
Allows altering the sensor's intrinsic behavior (grain structure, micro-contrast) by baking the metadata into the RAW file.
K445 Default
Grain Amount
Media
Micro-Contrast
Standard
La texture standard di Alexa 35. Ottimizzata per quasi tutte le situazioni. Il rumore è neutro e il dettaglio è bilanciato, rendendola la scelta più sicura se c'è un workflow VFX o non c'è tempo di fare test approfonditi in pre-produzione.
REVEAL Color Science & LogC4
To contain 17 stops, monitor IRE values are drastically lower than the old LogC3. A properly exposed LogC4 image will look underexposed to the eye.
Middle 18% Grey Shift
Do not try to 'lift' the midtones to match LogC3: you will irreparably blow out the highlights.
Legacy LogC3 (Alexa Mini/LF)
39.1% IRE
Nuovo LogC4 (Alexa 35)
28.4% IRE
-11% più scuro
AWG4 Color Space
- • Larger than Rec.2020. Accurately covers the entire visible spectrum.
- • Solves saturation clipping on extreme edges (neon lights, cyan lasers).
- • Grading is faster: altering contrast no longer artificially shifts saturation.
New False Color for LogC4
WARNING: The LogC4 curve shifts exposure down. Forget the old LogC3 IRE values.
Red (99-100%): Clipping. 17th Stop clipped.
Yellow (95-98%): Clip warning. Extreme specular highlights.
Pink (46-51%): Caucasian skin (Was 52-56%). Place faces here.
Green (25-31%): 18% Middle Grey (Was 38-42%). It is much lower.
Cyan (2-5%): Dense shadows, about 5 stops below grey.
Purple (0-2%): Noise Floor / Crushed blacks.
Protecting contrast without flattening the collection
For an ALEXA 35 fashion shoot, the first creative decision is how the Super 35 field of view supports the collection. Lens tests should include the widest runway or location frame, a mid-length movement shot and a close beauty angle, all with the real styling whenever possible. This exposes differences in perspective, facial rendering and garment geometry that specification sheets cannot answer. The intended delivery crop also matters: a composition designed for widescreen may lose its balance when adapted to vertical social versions. Marking both frames on the principal monitor during prep keeps the operator, director and client aligned from the first setup.
Lighting tests should concentrate on contrast, colour separation and the surfaces that are hardest to reproduce. Saturated fabrics, metallic details, wet-look makeup and practical LEDs can each create a different exposure problem. Instead of lowering contrast globally, place the subject so the key material retains shape while the background remains intentional. Confirm dimmed fixtures and mixed-source colours on camera, because their appearance may differ from how they look to the eye. Establish a repeatable reference for skin and neutral fabric, then preserve it when the schedule moves between studio, daylight and practical interiors.
The colour pipeline needs the same clarity as the lighting plan. Agree on the recording format, monitoring transform and project colour management before principal photography, and label any show LUT as a viewing decision rather than baked-in truth. Keep a clean technical reference alongside the preferred creative view so editorial and finishing can diagnose a mismatch quickly. Lens, filtration, exposure and white-balance notes should travel with every major scene. In the grade, this makes it possible to shape contrast around the collection, protect believable skin and keep campaign assets consistent across horizontal films, cut-downs and still extractions.
Before the shoot closes, keep one compact handoff package with the approved framing references, camera and lens list, recording settings, monitoring transform, colour-temperature strategy, filtration notes, media report and two or three representative stills. Editorial should receive proxies whose filenames and timecode preserve a direct route back to the source media. The colourist should receive the same viewing reference used on set together with notes for intentional exposure changes. This is also the moment to identify which shots must support horizontal, square and vertical versions, rather than discovering the constraint after the cut is locked. A clear handoff is less visible than a new camera feature, but it protects more of the photographed intent across review, conform, grade and final delivery.
Selected film
Gucci x Oscars 2024 — Homage to Heritage (with Lily Gladstone) | Making-Of Film — selected as a visual reference for this note.