Editing Single-8 (section)

=== Mechanical ===
Single-8 cartridges are nominally {{cvt|{{#expr:36.5+29.5}}|mm|in|2}} wide, {{cvt|{{#expr:2*29.5+43}}|mm|in|2}} high, and {{cvt|{{#expr:13.3-0.3}}|mm|in|3}} thick, according to the governing [[International Organization for Standardization|ISO]] standard. There are three round mounting bosses on one surface to help locate the cartridge within the camera.<ref name=ISO-3641:1976>{{cite web |url=https://www.iso.org/standard/9085.html |title=ISO 3641:1976 {{!}} Cinematography — Motion-picture camera cartridge, 8 mm Type S Model II — Cartridge fit and take-up core drive — Dimensions and specifications |date=June 1976 |publisher=International Organization for Standardization |access-date=13 December 2024}}</ref> In addition, like the notches on Super 8 cartridges, the Single-8 cartridge has several tabs, slots, and holes to automatically set film speed and type.<ref name=ISO-3646:1976>{{cite web |url=https://www.iso.org/standard/9090.html |title=ISO 3646:1976 {{!}} Cinematography — Motion-picture camera cartridge, 8 mm Type S Model II — Slots, projections and cartridge hole for indicating film speed, colour balance and film identification — Dimensions and positions |date=July 1976 |publisher=International Organization for Standardization |access-date=13 December 2024}}</ref>

[[File:S8M2 cartridge (Single-8).svg|thumb|right|upright=1.3|Single-8 cartridge with relevant indicators:
<ul>
<li>s1: Film speed indication tab; position relative to surface (T* dimension) varies with film speed.</li>
<li>s2: Film speed indication grooves; length of groove (J* or θ*) varies with film speed.</li>
<li>ID1: Film type / filter indication hole</li>
<li>ID2: Film type / filter indication tab</li>
</ul>]]
{|class="wikitable" style="font-size:90%;text-align:center;"
|+Single-8 cartridge film speed indicators<ref name=ISO-3646:1976/>
! colspan=2 | [[Film speed]]
! colspan=3 | Dimensions
|-
! DIN !! ASA
! θ* !! J* !! T*
|-
! 13 !! 16
| 22° || {{cvt|51.0|mm|in|2}} || {{cvt|11.6|mm|in|3}}
|-
! 14 !! 20
| 26° || {{cvt|50.5|mm|in|2}} || {{cvt|10.85|mm|in|3}}
|-
! 15 !! 25
| 30° || {{cvt|50.0|mm|in|2}} || {{cvt|10.10|mm|in|3}}
|-
! 16 !! 32
| 34° || {{cvt|49.5|mm|in|2}} || {{cvt|9.35|mm|in|3}}
|-
! 17 !! 40
| 38° || {{cvt|49.0|mm|in|2}} || {{cvt|8.60|mm|in|3}}
|-
! 18 !! 50
| 42° || {{cvt|48.5|mm|in|2}} || {{cvt|7.85|mm|in|3}}
|-
! 19 !! 64
| 46° || {{cvt|48.0|mm|in|2}} || {{cvt|7.10|mm|in|3}}
|-
! 20 !! 80
| 50° || {{cvt|47.5|mm|in|2}} || {{cvt|6.35|mm|in|3}}
|-
! 21 !! 100
| 54° || {{cvt|47.0|mm|in|2}} || {{cvt|5.60|mm|in|3}}
|-
! 22 !! 125
| 58° || {{cvt|46.5|mm|in|2}} || {{cvt|4.85|mm|in|3}}
|-
! 23 !! 160
| 62° || {{cvt|46.0|mm|in|2}} || {{cvt|4.10|mm|in|3}}
|-
! 24 !! 200
| 66° || {{cvt|45.5|mm|in|2}} || {{cvt|3.35|mm|in|3}}
|-
! 25 !! 250
| 70° || {{cvt|45.0|mm|in|2}} || {{cvt|2.60|mm|in|3}}
|-
! 26 !! 320
| 74° || {{cvt|44.5|mm|in|2}} || {{cvt|1.85|mm|in|3}}
|-
! 27 !! 400
| 78° || {{cvt|44.0|mm|in|2}} || {{cvt|1.10|mm|in|3}}
|}