Blow-up (film technology)
In film technology, blow-up describes the format change from a smaller camera negative - film format to a larger one. This is done when copying the film with high-precision optical banks , consisting of a single image projector and a synchronized single image camera.
Applications
For low-budget productions , you can use cheaper 16 mm camera technology and cheaper film material. The savings are between 5 and 10 percent, depending on the type of project. Documentation sometimes requires more manageable 16 mm equipment. The finished original is then optically enlarged to 35 mm film. With these blow-ups, however, all weaknesses and errors of the smaller film format are enlarged. Grains of dust, scratches, film grains or blurring become correspondingly larger.