luxmetered

The negatives

developed slowly, fixed properly

Sunny 16 and its cousins: exposure with no meter at all The rule, its weather-worn variations, and why film shooters still memorise them. How a phone camera becomes a light meter Auto-exposure as a rival meter, the arithmetic that unwinds it, and the error bars. Incident vs reflected: why cameras get snow wrong Two ways of measuring the same light, and the 18% assumption underneath one of them.