Free tools for the light
The maths Cutvey Meter runs on your phone, free in your browser: golden and blue hour by city, the sun anywhere, gels, mired, ND and a flicker-free shutter. Nothing to sign up for, nothing you type leaves your browser, and no tool ever asks where you are.
Golden hourGolden hour, for 40 citiesAny day, on the city's own clock, to the minute.Blue hourBlue hour, for 40 citiesMorning and evening twilight, and how long it lasts.SunSun and golden hour for any placeType a place or coordinates: sunrise, sunset, bearings and a call sheet line.GelsWhich gel takes this light to that oneKelvin to kelvin, in LEE or Rosco numbers, at most two sheets.MiredKelvin to mired, and the shiftType in kelvin or mired; the gel follows.NDHow much ND for your shutter and stopFor video: frame rate and shutter angle included.FlickerWhich shutter won't flicker50 or 60 Hz power, any frame rate, every safe shutter.ChartColor temperature chartCommon film lights and daylight in kelvin and mired.ChartGel chartEvery CTO and CTB, LEE and Rosco, with what each does to tungsten and daylight.
Cutvey Meter
Walk onto any set and know your light.
Free to download. $19.99, once, for iPhone, iPad and Apple Watch, or included in a Cutvey plan for each person on it.