To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
Languages
Recent
Show all languages
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

From Wikipedia, the free encyclopedia

A schema of 17.5 mm movie film formats
A schema of 17.5 mm movie film formats

17.5 mm film was a film gauge for as many of eight types of motion picture film stock, generally created by splitting unperforated 35 mm film.[1][2]

History

17.5 mm film was first documented in 1898 with the creation of the Birtac camera, and subsequently went through several different iterations up until the end of World War 2, when Kodak's 16 mm film and 8 mm film largely took its place in terms of popularity. In addition to original pioneering experiments, 17.5 mm film was used during World War II to use existing 35 mm stock more economically. Afterward, this format continued to be used primarily in developing countries such as India, or for projects where usage of regular 35 mm film would have been too expensive.

Partial list

Birtac

The British-American photographer and inventor Birt Acres split 35 mm film in half for his Birtac camera-projector in 1898. The film used had a single row of perforations running down the left side of the image, with two perforations per image. Historically, this is considered to be the first piece of motion picture equipment that utilized 17.5 film.[3]

Biokam

Alfred Wrench and Alfred Darling created second 17.5 mm format film in 1899 in London. The only differences between their and Acres' film was that their film had central perforations, and it could be utilized as a medium for still pictures as well. The Biokam camera, projector, and printer (all in one machine) was produced by the Warwick Trading Company.[2]

References

  1. ^ "Historic sub-35 mm film formats and camers". Retrieved 12 August 2016.
  2. ^ a b "17.5 millimeter film format". Australian Museum Of Motion Picture & Television. 25 July 2014. Retrieved 12 August 2016.
  3. ^ "Birtac 17.5mm Camera/Projector". Science Museum Group Collection. Science Museum Group. Retrieved 4 May 2020.

External links


This page was last edited on 4 May 2020, at 10:07
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.