Films · The stocksFilmsThe real films behind Clack’s six, from their datasheets.Kodak Portra 400Kodak Portra 400 is Kodak’s ISO 400 professional color negative film, made for skin tones, with fine grain and wide exposure latitude. Its data in a table, what it looks like and why (print against scan), overexposing and pushing it, at night, Portra 400 against Portra 800, Gold 200, UltraMax 400 and Ektar 100, Portra recipes, and the Clack film based on it.Updated 31 October 2026
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