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Film photography does not just mean photographic film and its processing with photo chemicals. [dubious – discuss] Itself a science and a craft of its own, changes in chemistry and developing time will affect the end result. An example is tintype photography. A tintype, also called ferrotype, is a positive photograph produced by applying a ...
However, the main disadvantage is still the film's very slow exposure, requiring hours of exposure time. This means that currently this type of film can be used only in ultra-long-exposure film photography where the subject is e.g. a city center where the photographer wants to fade all movement. [63]
Film is then dried in a dust-free environment, cut and placed into protective sleeves. Once the film is processed, it is then referred to as a negative. The negative may now be printed; the negative is placed in an enlarger and projected onto a sheet of photographic paper. Many different techniques can be used during the enlargement process.
This makes most chemical-based photography a two-step process, which uses negative film and ordinary processing. Special films and development processes have been devised so that positive images can be created directly on the film; these are called positive, or slide, or (perhaps confusingly) reversal films and reversal processing.
The technology of film emerged mostly from developments and achievements in the fields of projection, lenses, photography and optics.Early techniques that involve moving pictures and/or projection include:
In these shutters, although each part of the film is exposed for the rated exposure time, the film is exposed by a slit which moves across the film in a time (the "X-sync speed") of the order of 1/100"; although the exposure of each part of the film may be 1/2000", the last part of the film is exposed later by the X-sync time than the first ...