Instrument Invention
- When
- 1874
- Where
- Place of invention not specified
Janssen invented the photographic revolver in 1874, the instrument that originated chronophotography.
In 1874, Janssen invented the Revolver of Janssen, or Photographic Revolver, the instrument that originated chronophotography. The Passage de Vénus photographs are associated with this device, but a 2005 study concluded that all extant plates made with the photographic revolver are practice plates shot with a model, so the surviving sequence's status as a direct record made with the instrument is uncertain. The place of invention is not specified in the sources.
Sources
- Pierre Janssen Wikipedia, revision of 2026-08-12
- Passage de Vénus Wikipedia, revision of 2026-09-20
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.