What is "photo-finish"

Photo-Finish is the seventh studio album by Irish musician Rory Gallagher, released in 1978. It marked a turning point in Gallagher's career. Most of the songs on Photo-Finish were initially recorded on what was to be an earlier album called Torch but Gallagher was unhappy with the recordings. He fired the drummer and keyboardist from his current band and replaced only the drummer changing the band to a power trio as his original bands had been.