I generally agree but would like to add some minor corrections: not 1⁄16 of a second but 1⁄32 because the other half of the time shutter opens or closes, although even exposures much shorter than that were already achieved in the 1870s for the scientific purposes. However, that application used hard plates and thus didn’t have to deal with the problem of film tearing in the camera.
Decent lenses and dry gelatine process were also ready by the 1880s, and the idea of making photographic film from oiled paper (Eastman used it initially, but it was very fragile) was present as well. Thus, I think, the actual barrier to inventing cinematography was producing clear transparent nitrocellulose (~1883), a technology transfer to the photographic film soon followed (~1887), then a few more years for figuring out the camera (and projector) mechanics.
I generally agree but would like to add some minor corrections: not 1⁄16 of a second but 1⁄32 because the other half of the time shutter opens or closes, although even exposures much shorter than that were already achieved in the 1870s for the scientific purposes. However, that application used hard plates and thus didn’t have to deal with the problem of film tearing in the camera.
Decent lenses and dry gelatine process were also ready by the 1880s, and the idea of making photographic film from oiled paper (Eastman used it initially, but it was very fragile) was present as well. Thus, I think, the actual barrier to inventing cinematography was producing clear transparent nitrocellulose (~1883), a technology transfer to the photographic film soon followed (~1887), then a few more years for figuring out the camera (and projector) mechanics.
Also, I don’t think that safety of the projector was solved until well into the 20th c., e. g., see https://en.wikipedia.org/wiki/Bazar_de_la_Charit%C3%A9#Fire_of_1897