Editing 120 film (section)

== Frame sizes ==
[[Image:Pentaxshift.jpg|thumb|256x256px|[[Pentax 6×7]] [[Single-lens reflex camera|SLR]] camera with [[perspective control lens]]]]
120 film allows several frame sizes.
{|class="wikitable"
|+120 frame sizes
|-
! rowspan=2 | Nominal size
(cm)
! rowspan=2 | Aspect ratio
! rowspan=2 | Actual size<br>(mm)
! colspan=2 | Exposures
|-
! 120 !! 220
|-
! 6 × 4.5
| 1:1.35 || 56 × 41.5<ref>[http://www.pentax.jp/english/imaging/filmcamera/medium/645n2/spec.html 645NII specifications] {{Webarchive|url=https://web.archive.org/web/20100318063725/http://www.pentax.jp/english/imaging/filmcamera/medium/645n2/spec.html |date=March 18, 2010 }}, Pentax.</ref> || 15 or 16<sup>†</sup> || 30–32
|-
! 6 × 6
| 1:1 || 56 × 56 || 12 or 13 || 24–27
|-
! 6 × 7
| 1:1.25 || 56 × 70 || 10 || 20
|-
! 6 × 8
| 1:1.37 || 56 × 77 || 9 || 19
|-
! 6 × 9
| 1:1.50 || 56 × 84 || 8 || 16
|-
! 6 × 12
| 1:2.1 || 56 × 118 || 6 || 12
|-
! 6 × 17
| 1:3 || 56 × 168 || 4 || 9
|-
! 6 × 24
| 1:4 || 56 × 224 || 3 || 6
|}

<sup>†</sup><small>''User selectable on newer cameras, if a roll is only partially used then a "kink" may appear in the film where the roll touches rollers in a film back magazine and this may end up on a frame; this is not a problem when 15 exposures are used as the gaps between exposed frames is larger, nor if the camera is not used intermittently.''</small>

The 6×9 frame has the same aspect ratio as the standard 24×36&nbsp;mm frame of [[135 film]]. The 6×7 frame enlarges almost exactly to 8×10&nbsp;inch paper, for which reason its proponents call it "ideal format". 6×4.5 is the smallest and least expensive roll-film frame size.

The wide 6×12, 6×17, and 6×24&nbsp;cm frames are produced by special-purpose [[panoramic photography|panoramic]] cameras. Most of these cameras use lenses intended for [[large format]] cameras for simplicity of construction.

Cameras using 120 film will often combine the numbers of the frame size in the name e.g. [[Pentax 6×7]] (6×7), [[Fujifilm|Fuji]] 617 (6×17), and many ''645''s (6×4.5). The number '6' in general, and the word 'six' are also commonly used in naming cameras e.g. [[Kiev-Arsenal#Kiev 60|Kiev 60]] and [[Pentacon Six]].