Indication of how sensitive a film was to light. It was measured in numbers. The lower the number the lower the sensitivity of
the film and the finer the grain in the shots you’re taking.
Intelligent Through the Lens. Pre-flash based evaluative flash metering system.
Incandescent light bulb
Electric light which produces light with a wire filament heated to a high temperature by an electric current passing
through it, until it glows. Quartz lights, Mandarin lights use incandescent light bulbs.