Editing 70 mm film (section)

==Technical specifications==

===Standard 65&nbsp;mm (5/70) (Todd-AO, Super Panavision)===
* spherical lenses
* 5 perforations/frame (1 perforation = 0.1875 in or 3/16 in, thus 1 frame of 70&nbsp;mm film has a height of 0.9375 in or 15/16 in)<!-- How much of that height is the active image area? Is there some gap between the top of one image and the bottom of another? -->
* 42 frames/meter (12.8 frames/ft)
* 34.29&nbsp;meters/minute (112.5&nbsp;ft/minute)
* [[vertical pulldown]]
* 24 frames/second
* ''camera aperture'': 52.63 by 23.01&nbsp;mm (2.072 by 0.906&nbsp;in)<ref name="awsm_dimensions">{{cite web|url=http://www.widescreenmuseum.com/widescreen/filmdims.htm|work=The American WideScreen Museum|title=Film Frame Dimensions|access-date=1 December 2015}}</ref>
* ''projection aperture'': 48.56 by 22.10&nbsp;mm (1.912 by 0.870&nbsp;in)<ref name="awsm_dimensions" />
* 305&nbsp;m (1000&nbsp;feet), about 9 minutes at 24 frame/s = 4.5&nbsp;kg (10 pounds) in can
* ''aspect ratio'': 2.2:1

===Ultra Panavision 70 (MGM Camera 65)===
{{main|Ultra Panavision 70}}
''Same as Standard 65 mm except''
* ''projection aperture'': 48.59 by 22.05&nbsp;mm (1.913 by 0.868&nbsp;in)<ref name="awsm_dimensions" />
* MGM Camera 65 lenses built by Panavision employed a square-shaped, double wedge-prism anamorphic attachment in front of a spherical objective lens.  By the time of ''[[Mutiny on the Bounty (1962 film)|Mutiny on the Bounty (1962)]]'' Panavision had developed a new set of Ultra Panavision 70 lenses that used a high quality cylindrical anamorphic element in front of the objective lens.  These new lenses were far superior to the prism anamorphics—they were lighter, transmitted more light and suffered from less spherical and chromatic aberration.
* 1.25x squeeze factor, projected aspect ratio 2.76:1

===Showscan===
{{main|Showscan}}
''Same as Standard 65&nbsp;mm except''
* 60 frames per second
* 180 degree shutter

===[[IMAX]] (15/70)===
* [[spherical lens]]es
* 70&nbsp;mm film, 15 perforations per frame
* horizontal rolling loop movement, from right to left (viewed from emulsion side)
* 24 frames per second
* ''camera aperture:'' {{convert|70.41|x|52.63|mm|in|abbr=on}}
* ''projection aperture:'' at least {{convert|2|mm|in|abbr=on}} less than camera aperture on the vertical axis and at least {{convert|0.41|mm|in|abbr=on}} less on the horizontal axis
* ''aspect ratio:'' 1.43:1

===[[IMAX Dome]] / OMNIMAX===
''Same as IMAX except''
* [[fisheye lens]]
* lens optically centered {{convert|9.4|mm|in|abbr=on}} above film horizontal center line
* projected elliptically on a dome screen, 20° below and 110° above perfectly centered viewers

===Omnivision Cinema 180===
''same as standard 65/70 except:''
* photographed and projected with special fisheye lenses matched to large 180 degree dome screen
* Theatres upgraded from 70&nbsp;mm 6-track analog sound to DTS digital sound in 1995.

Omnivision started in [[Sarasota, Florida]]. Theatres were designed to compete with Omnimax but with much lower startup and operating costs. Most theatres were built in fabric domed structures designed by Seaman Corporation. The last known OmniVision theatres to exist in USA are The Alaska Experience Theatre in [[Anchorage, Alaska]], built in 1981 (closed in 2007, reopened in 2008), and the Hawaii Experience Theatre in  [[Lahaina, Hawaii]] (closed in 2004). [[Rainbow's End (theme park)]] in NZ had the only remaining permanent Cinema 180 attraction until May 2015 when it was demolished.
 
One of the few producers of 70&nbsp;mm films for Cinema 180 was the German company Cinevision (today AKPservices GmbH, Paderborn).

===Dynavision (8/70)===
[[File:65 mm film (8-70).svg|thumb|right|upright=1.42|8-perf 70&nbsp;mm film diagram]]
* fisheye or spherical lenses, depending on if projecting for a dome or not
* vertical pulldown
* 24 or 30 frames per second
* ''camera aperture'': 52.83 by 37.59&nbsp;mm (2.080 by 1.480&nbsp;in)

===Astrovision (10/70)===
* vertical pulldown
* normally printed from an Omnimax negative
* projected onto a dome
* almost exclusively in use only by Japanese [[planetarium]]s
* the only 70&nbsp;mm format without sound, hence the only one with perforations next to the edges