Historically, a hand cranked strip photograph was taken at the finishing line. Today, finish-line photos are still used in nearly every modern racing sport. Although some sports use electronic equipment to track the racers during a race, a photo is considered the most important evidence in selecting the winner. However, they may be examined only when a race is close or when a record has been broken, however are often used to give official times for events. An alternative is the use of manual touch pads to register a time by the athletes themselves, such as in competitive swimming.
At the finish line, photocells and digital cameras are used to establish the placings. Sometimes, in a race as fast as the 100 m sprint, all eight athletes can be separated by less than half a second. It is not uncommon for two athletes to have exactly the same time recorded without there being a deadheat.
The 2008 Summer Olympics saw the introduction of some of the fastest timekeeping equipment yet, with cameras that take photographs 3000 times a second (compared to 1996, which were 1,000 times per second).
The second method for creating this strip involves combining individual photographs. A high speed camera or a movie camera is used to take a continuous series of partial frame photos at a fast rate, while leaving no blank space between the cells.
With all methods, time markings along the bottom of the photo can be used to find the exact crossing time of any racer, or simply used to compare their finishing positions along the strip.
Category:Athletics (track and field) terminology Category:Horse racing Category:Photographic techniques
cs:Cílová fotografie de:Zielfoto es:Foto finish fr:Photo-finish it:Fotofinish nl:Fotofinish ja:写真判定 ru:ФотофинишThis text is licensed under the Creative Commons CC-BY-SA License. This text was originally published on Wikipedia and was developed by the Wikipedia community.
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