Photography Through Time
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Sources & method

Each entry lists its own references and, where one is freely available, a primary source: the original paper, patent or manual. Every link is checked to load. Text is written fresh from these sources; nothing is copied from the books.

Dates. Most inventions grew over years. Each star sits at a widely used starting point (a first demonstration, a patent, a first product), and where the start is gradual or disputed the entry gives a range. Where sources disagree, the entry says so.

Impact ("changed photography for everyone", "major", "significant", "niche") is a judgment for orientation, not a measurement.

Images are public domain only, each credited with its source.

General sources