Editing Negative pulldown (section)

===2-perf===
{{main|Techniscope}}

2-perf camera systems use 2 perforations per frame on 35&nbsp;mm film with an aspect ratio close to 2.39:1; the aspect ratio used in [[anamorphic]] prints. It was first proposed conceptually around 1930, but was not put into practice until 1961, when [[Techniscope]] was developed at [[Technicolor]]'s Italian branch. It has recently been brought up again with the advent of higher quality, lower grain [[film stock]]s as well as [[digital intermediate]] post-production methods which eliminate optical blowups and thus improve quality. While in the recent past, some companies have offered custom conversions of camera equipment to 2-perf, it appears that camera manufacturers are now poised to support the format. [[Arri]] made 2-perf movement blocks for their [[Arricam]] and [[Arriflex 235]] cameras available for rental in March 2007.<ref>Arri advertisement, ''British Cinematographer'', March 2007, p. 2.</ref> [[Aaton]]'s [[Aaton Penelope|Penelope]] camera, released in October 2008, was the first camera specifically designed for 2-perf usage (as well as 3-perf).