Why is 120 film called 120

Oct 3, 6. Because it's mm, duh. Oct 3, 7. Messages: 2, Oct 3, 8. Actually Oct 3, 9. Didn't we already have a thread on this a few months back? Oct 3, Worth reading! These roll film holders took films labeled in the "50" series. The film for my camera was Why is it called an "iPhone? From there, names and numbers become traditional then, finally, a standard.

The identifier, "," was once a Kodak-specific number but, now, any roll film that is Today, we just call it " film" just the way most people call any given soft drink "Coke" even if they are drinking cherry soda.

That is mostly a regionalism of the Southeastern US but many people in other places have, at least, heard of it. But for the foregoing history lesson, few people know why it's called "" except to say that it's a number Kodak used when they invented it. All that is is correct.

Well Kodak films were initially named after the cameras that used them. That designation began when the Kodak No.

This made sense initially. But by Kodak had quite an array of cameras on the go and things got confusing. So Kodak made a decision to move the naming of their daylight loading spool film like over to a number system. The Number simple represented when the film was first introduced and started at with the roll film used in the No.

It has nothing to do with the size of the negatives. It is just the 20th type of daylight loading roll film Kodak made since In fact films to were purely developed for cartridge holders for older glass plate cameras allowing them to use roll film. Standard frame size and number of exposures are: 6x4. No perforated edges—the film goes from one spool to another.

Film has protective backing paper on it. The lack of backing paper allows the longer film to fit on the same sized spool as film, and the resulting thinner film requires a different pressure plate to achieve the best focus.

Some cameras require a separate insert for this film type, while others come with different camera settings to accommodate both and Typically or film types. Because the film is larger, the subsequent images can be printed larger without as much grain.