Translations:Adventist Youth Honors Answer Book/Arts and Crafts/Digital Photography/21/en
From Pathfinder Wiki
The aperture stop is an extremely important element in most optical designs. Its most obvious feature is that it limits the amount of light that can reach the image plane. This can either be undesired, as in a telescope where one wants to collect as much light as possible; or deliberate, to prevent saturation of a detector or overexposure of film. In both cases, the size of the aperture stop is constrained by things other than the amount of light admitted, however:
- The size of the stop is one factor that affects depth of field. Smaller stops produce a longer depth of field, allowing objects at a wide range of distances to all be in focus at the same time.
