Unless you are content with a mere photoprint (which captures silhouettes of opaque objects and filtered images of translucent ones placed upon illuminated film), you also need an optical system for creating an image of the scene at the "film plane."
Typically, that optical system is coupled to a camera, which at a minimum allows film loading and unloading, and holds the film in such a way as to protect it from light except when the photograph is being taken.
I . . .
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- The Grantville Gazette Staff