Editing F-number (section)

==== Standard full-stop f-number scale ====
Including [[APEX system|aperture value]] AV:
<math display=block>N = \sqrt{2^{\text{AV}}}</math>

Conventional and calculated f-numbers, full-stop series:
{|class="wikitable" style="text-align:center"
! scope="row" | AV
| −2 || −1 || 0 || 1 || 2 || 3 || 4 || 5 || 6 || 7 || 8 || 9 || 10 || 11 || 12 || 13 || 14 || 15 || 16
|-bgcolor="#CCFFCD"
! scope="row" | ''N''
| 0.5 || 0.7 || 1.0 || 1.4 || 2 || 2.8 || 4 || 5.6 || 8 || 11 || 16 || 22 || 32 || 45 || 64 || 90 || 128 || 180 || 256
|-
! scope="row" | calculated
| 0.5 || 0.707... || 1.0 || 1.414... || 2.0 || 2.828... || 4.0 || 5.657... || 8.0 || 11.31... || 16.0 || 22.62... || 32.0 || 45.25... || 64.0 || 90.51... || 128.0 || 181.02... || 256.0
|}