Editing F-number (section)

==== Typical one-third-stop f-number scale ====
{|class="wikitable" style="text-align:center"
! scope="row" | AV
| −1 || −{{frac|2|3}} || −{{frac|3}} || 0 || {{frac|3}} || {{frac|2|3}} || 1 || {{frac|1|1|3}} || {{frac|1|2|3}} || 2 || {{frac|2|1|3}} || {{frac|2|2|3}} || 3 || {{frac|3|1|3}} || {{frac|3|2|3}} || 4 || {{frac|4|1|3}} || {{frac|4|2|3}} || 5 || {{frac|5|1|3}} || {{frac|5|2|3}} || 6 || {{frac|6|1|3}} || {{frac|6|2|3}} || 7 || {{frac|7|1|3}} || {{frac|7|2|3}} || 8 || {{frac|8|1|3}} || {{frac|8|2|3}} || 9 || {{frac|9|1|3}} || {{frac|9|2|3}} || 10 || {{frac|10|1|3}} || {{frac|10|2|3}} || 11 || {{frac|11|1|3}} || {{frac|11|2|3}} || 12 || {{frac|12|1|3}} || {{frac|12|2|3}} || 13
|-bgcolor="#e5d1cb"
! scope="row" | ''N''
|style="background:#CCFFCC;"| 0.7 || 0.8 || 0.9 ||style="background:#CCFFCC;"| 1.0 || 1.1 || 1.2 ||style="background:#CCFFCC;"| 1.4 || 1.6 || 1.8 ||style="background:#CCFFCC;"| 2 || 2.2 || 2.5 ||style="background:#CCFFCC;"| 2.8 || 3.2 || 3.5 ||style="background:#CCFFCC;"| 4 || 4.5 || 5.0 ||style="background:#CCFFCC;"| 5.6 || 6.3 || 7.1 ||style="background:#CCFFCC;"| 8 || 9 || 10 || style="background:#CCFFCC;"|11 || 13 || 14 ||style="background:#CCFFCC;"| 16 || 18 || 20 ||style="background:#CCFFCC;"| 22 || 25 || 29 ||style="background:#CCFFCC;"| 32 || 36 || 40 ||style="background:#CCFFCC;"| 45 || 51 || 57 ||style="background:#CCFFCC;"| 64 || 72 || 80 ||style="background:#CCFFCC;"| 90
|}

Sometimes the same number is included on several scales; for example, an aperture of {{f/|1.2}} may be used in either a half-stop<ref>
{{cite book
 | url = https://books.google.com/books?id=YjAzP4i1oFcC&pg=PA136
 | title = Set lighting technician's handbook: film lighting equipment, practice, and electrical distribution
 | author = Harry C. Box
 | edition = 3rd
 | publisher = Focal Press
 | year = 2003
 | isbn = 978-0-240-80495-8
 }}</ref>
or a one-third-stop system;<ref>
{{cite book
 | url = https://books.google.com/books?id=DvYMl-s1_9YC&pg=PA19
 | title = Underwater photography
 | author = Paul Kay
 | publisher = Guild of Master Craftsman
 | year = 2003
 | isbn = 978-1-86108-322-7
 }}</ref>
sometimes {{f/|1.3}} and {{f/|3.2}} and other differences are used for the one-third stop scale.<ref>
{{cite book
 | url = https://books.google.com/books?id=IWkpoJKM_ucC&pg=PA145
 | title = Manual for cinematographers
 | author = David W. Samuelson
 | edition = 2nd
 | publisher = Focal Press
 | year = 1998
 | isbn = 978-0-240-51480-2
 }}</ref>