Commonly Exposure latitude - The range of brightness, including shadow detail, that a film can record in a single image before the highlights wash out or the shadows become muddy. Fast films generally have greaterexposure latitude than slow films. Knowing a film’s latitude lets you know how much exposure can be varied and still produce an acceptable image.Photo Tips
In a photographic process, the range of exposure over which substantially correct reproduction is obtained. When the process is represented by an H & D curve, the latitude is the projection on the exposure axis of that part of the curve that approximates a straight line within the tolerance permitted for the purpose at hand.
The ability of negative film to hold information over a wide brightness range. Wide latitude is a benefit in movie making because you cannot see if exposure was correct until after the film is processed. Wide latitude also allows adjustment in printing to handle over- or underexposure.
The acceptable limits of things such as focusing, exposure and development.
The degree to which a certain film stock can tolerate under- or overexposure. Reversal film, for all practical purposes, has a very little latitude. Color negative has a higher latitude, and particular of its latitude it is tolerant of much more overexposure than underexposure.
The variance from proper exposure which will still provide acceptable results.