Color IR film generally does not require compensation. Infrared focus see IR setting . Instamatic camera is a compact camera popular in the 1960s and 70s with very simple controls, taking 126 film and yielding a 28 x28 mm negative. Integral tri-pack is three emulsions, usually of different character, coated on the same film base. Integrating is a term used to describe a method of arriving at an exposure setting by taking an average of the light readings from the bright areas and the and the shadow areas of the subject.
Intensification is a chemical method of increasing the density of the photographic image.
It is only suitable for treating negative materials and works better on negatives that have been underdeveloped rather than underexposed. Intensity scale is an exposure scale in which the time of exposure remains constant but the intensity of light increases in regular stops. Interchangeable lens system is a system of lenses of different focal lengths made to fit the same camera body. Interleaving is a method of agitating more than one sheet of photographic paper in the same tray of chemicals. Intermittency effect states that, a number of short, separate exposures will not produce the same photographic result when combined as a single exposure of equivalent total duration.