Film perforations

（重定向自Film perforation）

Perforations on Standard (left) and Super (right) 8 mm film

The shapes and dimensions of 35 mm sprocket holes.

Film perforations, also known as perfs, are the holes placed in the film stock during manufacturing and used for transporting (by sprockets and claws) and steadying (by pin registration) the film. Films may have different types of perforations depending on film gauge, film format, and intended usage. Perforations are also used as a standard measuring reference within certain camera systems to refer to the size of the frame.

单词	Film perforation
释义	Film perforation 英语百科 Film perforations （重定向自Film perforation） Film perforations, also known as perfs, are the holes placed in the film stock during manufacturing and used for transporting (by sprockets and claws) and steadying (by pin registration) the film. Films may have different types of perforations depending on film gauge, film format, and intended usage. Perforations are also used as a standard measuring reference within certain camera systems to refer to the size of the frame.
随便看	proxiphylline proxiphyllinum prox. luc. proxmial gastric vagotomy and pyloroplasty Proxmire Proxmired Proxmoceptor proxodolol Proxol Proxorphan proxxer proxxest proxy address resolution protocol proxy agent proxy, agent Proxy ARP proxy attack proxy attribute Proxy battle Proxy bidding Proxy cache proxy climate indicator proxy climatic record Proxy Committee Proxy contest