Chronocinematograph

Chronocinematograph is an astronomical instrument consisting of a film camera, chronometer and chronograph.

[1]: 15 [2]: 284–285  The device records images using a more precise timetable for observing an eclipse.

It was invented in 1927 by a Polish astronomer, mathematician and geodesist Tadeusz Banachiewicz for observing total solar eclipses.

[1]: 15 [2]: 284–285  During the same year, Banachiewcz used his device for solar observations in Lapland (Sweden), then in the US (1932) and Greece, Japan and Siberia (1936).

[1]: 15 [2]: 286 The invention enhanced the precision for determining the time of an eclipse, due to more precisely timed photos of Baily's beads,[1]: 15 [2]: 284–285  and quantifying the duration of totality.