8 mm or 8mm may refer to:
;Film technology
*
8 mm film
8 (eight) is the natural number following 7 and preceding 9.
In mathematics
8 is:
* a composite number, its proper divisors being , , and . It is twice 4 or four times 2.
* a power of two, being 2 (two cubed), and is the first number of t ...
, a photographic cine film format principally intended for domestic use. The term may also refer to later variants:
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Super 8 mm film
Super 8 mm film is a motion-picture film format released in 1965 by Eastman Kodak as an improvement over the older "Double" or "Regular" 8 mm home movie format.
The film is nominally 8 mm wide, the same as older formatted ...
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Single-8 film
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8 mm video format
The 8mm video format refers informally to three related videocassette formats. These are the original Video8 ( analog recording) format and its improved successor Hi8 ( analog video and analog audio but with provision for digital audio), as wel ...
, a type of video recorder and tape that is primarily used in camcorders, including Video 8 and Hi 8
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Digital8
Digital8 (or Di8) is a consumer digital recording videocassette for camcorders based on the 8 mm video format developed by Sony, and introduced in 1999.
The Digital8 format is a combination of the earlier analog Hi8 tape transport with the di ...
video tape format
;Firearms
*
8 mm caliber
This is a list of firearm cartridges which have bullets in the caliber range.
*''Length'' refers to the empty cartridge case length
*''OAL'' refers to the overall length of the loaded cartridge
All measurements are in mm (in)
Pistol cartri ...
, ammunition with bullet in the 8 mm (.315 in) caliber range
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7.92×57mm Mauser
The 7.92×57mm Mauser (designated as the 8mm Mauser or 8×57mm by the SAAMI and 8 × 57 IS by the C.I.P.) is a rimless bottlenecked rifle cartridge. The 7.92×57mm Mauser cartridge was adopted by the German Empire in 1903–1905, and was the Ge ...
"8 mm Mauser cartridge" – a rifle cartridge originating in Germany (though not designed by the Mauser company)
;Other uses
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8mm (band)
8mm is a rock band from Los Angeles, California. 8mm was started by Sean Beavan (who formerly worked with bands such as Marilyn Manson, Nine Inch Nails and God Lives Underwater), and his wife Juliette Beavan. 8mm has toured internationally i ...
, pop-rock band from Los Angeles, California
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''8mm'' (film), about a private detective trying to verify the authenticity of a snuff film
{{Letter-Number Combination Disambiguation