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}

3D rendering of a Chronocinematograph

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. This could not have been observed as closely as before due to the brightness of the sun.^{[1]: 15 [2]: 284–286}