Editing Normal lens (section)

===Digital still===
{{Also|Image sensor format#Table of sensor formats and sizes}}
In [[digital photography]], many smaller sensor sizes are specified in terms such as 1" or 2/3".
These measurements do not correspond directly to dimensions of the sensor, but rather to dimensions of an equivalent [[Video camera tube#Size|video camera tube (VCT)]].
The normal lens focal length is roughly 2/3 of the video camera tube diameter.

{| class="wikitable"
|-
! Sensor type !! equiv. VCT diameter !! Image dimensions !! Image diagonal !! Normal lens focal length
|-
| 1/3.6"
| 7.1&nbsp;mm
| 3.0 × 4.0&nbsp;mm
| 5.0&nbsp;mm
| 5&nbsp;mm
|-
| 1/3.2"
| 7.9&nbsp;mm
| 3.4 × 4.5&nbsp;mm
| 5.7&nbsp;mm
| 5.7&nbsp;mm
|-
| 1/3"
| 8.5&nbsp;mm
| 3.6 × 4.8&nbsp;mm
| 6.0&nbsp;mm
| 6&nbsp;mm
|-
| 1/2.7"
| 9.4&nbsp;mm
| 4.0 × 5.4&nbsp;mm
| 6.7&nbsp;mm
| 6.7&nbsp;mm
|-
| 1/2.5"
| 10.2&nbsp;mm
| 4.3 × 5.8&nbsp;mm
| 7.2&nbsp;mm
| 7&nbsp;mm
|-
| 1/2"
| 12.7&nbsp;mm
| 4.8 × 6.4&nbsp;mm
| 8.0&nbsp;mm
| 8&nbsp;mm
|-
| 1/1.8"
| 14.1&nbsp;mm
| 5.3 × 7.2&nbsp;mm
| 8.9&nbsp;mm
| 9&nbsp;mm
|-
| 1/1.7"
| 14.9&nbsp;mm
| 5.7 × 7.6&nbsp;mm
| 9.5&nbsp;mm
| 9.5&nbsp;mm
|-
| 2/3"
| 16.9&nbsp;mm
| 6.6 × 8.8&nbsp;mm
| 11.0&nbsp;mm
| 11&nbsp;mm
|-
| 1"
| 25.4&nbsp;mm
| 9.6 × 12.8&nbsp;mm
| 16.0&nbsp;mm
| 16&nbsp;mm
|-
| [[Four Thirds system|Four Thirds]]<ref name = "Four Thirds">{{citation | url = http://www.four-thirds.org/en/about/standard.html | publisher = Four Thirds Consortium | title = The Four Thirds Standard | access-date = 2009-04-17 | year = 2008 | archive-url = https://web.archive.org/web/20090307060248/http://www.four-thirds.org/en/about/standard.html | archive-date = 2009-03-07 | url-status = dead }}</ref>
| 33.9&nbsp;mm
| 13 × 17.3&nbsp;mm<ref name = "Olympus">{{cite web | url = http://www.olympus-europa.com/consumer/dslr_7045.htm | archive-url=https://web.archive.org/web/20110927125844/http://www.olympus-europa.com/consumer/dslr_7045.htm | publisher = Olympus Europa | title = No more compromises: the Four Thirds standard | archive-date=2011-09-27 }}</ref>
| 21.63&nbsp;mm
| 22&nbsp;mm
|-
| 4/3"
| 33.9&nbsp;mm
| 13.5 × 18.0&nbsp;mm
| 22.5&nbsp;mm
| 23&nbsp;mm
|-
| APS-C
| 45.7&nbsp;mm
| 15.1 × 22.7&nbsp;mm
| 27.3&nbsp;mm
| 27&nbsp;mm
|-
| [[Nikon DX format|DX]]
| n/a
| 15.8 × 23.7&nbsp;mm
| 28.4&nbsp;mm
| 28&nbsp;mm
|-
| [[Full-frame digital SLR|FF]] (35&nbsp;mm film)
| n/a
| 24 × 36&nbsp;mm
| 43.3&nbsp;mm
|  50&nbsp;mm
|-
| (6 × 5&nbsp;cm)
| n/a
| 36.7 × 49.0&nbsp;mm
| 61.2&nbsp;mm
|
|}