Editing Normal lens (section)

===Film still===
[[File:Normal Lenses 7253.jpg|thumb|Four "normal" lenses for the 35&nbsp;mm format.]]
Typical normal lenses for various [[film format]]s for photography are:{{citation needed|date=April 2017}}

{| class="wikitable"
|-
! Film format !! Image dimensions !! Image diagonal !! Normal lens focal length
|-
| 9.5&nbsp;mm [[Minox]]
| 8 × 11&nbsp;mm
| 13.6&nbsp;mm
| 15&nbsp;mm
|-
| Half-frame
| 24 × 18&nbsp;mm
| 30&nbsp;mm
| 30&nbsp;mm
|-
| [[Advanced Photo System|APS]] C
| 16.7 × 25.1&nbsp;mm
| 30.1&nbsp;mm
| 28&nbsp;mm, 30&nbsp;mm
|-
| [[135 film|135]], 35&nbsp;mm
| 24 × 36&nbsp;mm
| 43.3&nbsp;mm
| 40&nbsp;mm, 50&nbsp;mm, 55&nbsp;mm
|-
| [[120 film|120]]/[[220 film|220]], 6 × 4.5 (645)
| 56 × 42&nbsp;mm
| 71.8&nbsp;mm
| 75&nbsp;mm
|-
| 120/220, 6 × 6
| 56 × 56&nbsp;mm
| 79.2&nbsp;mm
| 80&nbsp;mm
|-
| 120/220, 6 × 7
| 56 × 68&nbsp;mm
| 88.1&nbsp;mm
| 90&nbsp;mm
|-
| 120/220, 6 × 9
| 56 × 84&nbsp;mm
| 101.0&nbsp;mm
| 105&nbsp;mm
|-
| 120/220, 6 × 12
| 56 × 112&nbsp;mm
| 125.0&nbsp;mm
| 120&nbsp;mm
|-
| 120/220, 6 x 17
| 56 x 168&nbsp;mm
| 177.1&nbsp;mm
| 180&nbsp;mm
|-
| [[large format]] 4 × 5 [[sheet film]]
| 93 × 118&nbsp;mm (image area)
| 150.2&nbsp;mm
| 150&nbsp;mm
|-
| large format 5 × 7 sheet film
| 120 × 170&nbsp;mm (image area)
| 208.0&nbsp;mm
| 210&nbsp;mm
|-
| large format 8 × 10 sheet film
| 194 × 245&nbsp;mm (image area)
| 312.5&nbsp;mm
| 300&nbsp;mm
|-
|}

For a [[135 film|35&nbsp;mm]] [[camera]] with a diagonal of 43&nbsp;mm, the most commonly used ''normal'' lens is 50&nbsp;mm, but focal lengths between about 40 and 58&nbsp;mm are also considered ''normal''. The 50&nbsp;mm focal length was chosen by [[Oskar Barnack]], the creator of the [[Leica Camera|Leica camera]].<ref>{{cite journal |last1=Rimmasch |first1=Paul |title=Lens Testing: Reassessing the 50 mm Rule |journal=Journal of Forensic Identification |date=July 2017 |volume=67 |issue=3 |pages=323–340}}</ref><ref>{{cite journal |last1=Li |first1=Xiang |last2=Liu |first2=Jianzheng |last3=Baron |first3=Jessica |last4=Luu |first4=Khoa |last5=Patterson |first5=Eric |title=Evaluating effects of focal length and viewing angle in a comparison of recent face landmark and alignment methods |journal=EURASIP Journal on Image and Video Processing |date=March 2021 |volume=2021 |issue=1 |doi=10.1186/s13640-021-00549-3|s2cid=232414675 |doi-access=free }}</ref>

Note that the angle of view also depends on the [[aspect ratio (image)|aspect ratio]]. For example, a "normal" lens on 35&nbsp;mm does not have the same view as a "normal" lens on [[645 film|645]].{{citation needed|date=April 2017}}