1. subminiature - Noun
2. subminiature - Adjective
Compact or smaller than miniature.
1952 March, Leonard Engel, “Little Gadget with a Large Future”, in Harper's Magazine, volume 204, number 1222, page 57:Vacuum tubes and other circuit components have been produced in miniature and subminiature versions.
(photography) of photography equipment and techniques using a smaller frame than 35mm
1964 November, “Minolta Hi-matic 7”, in Sunset, page 136:Other Minolta cameras from $27 to $270, including subminiature, "snapshot," 35mm rangefinder and single lens reflex models...
Any item smaller than that considered miniature, especially electronic and electromechanical devices
1948 April, “Sounds Good to Her: Raytheon CK510AX”, in Electronics, volume 21, number 4, page 143:One of these Raytheon Subminiatures takes the place of two old style tubes and its small size results in lower microphonics.
A subminiature camera, generally with a frame smaller than 35mm
1958 September, “10 ways to dramatize the ordinary”, in Popular Photography, volume 3, number 45, page 60:The popularity of today’s wide-angle lenses and the subminiatures with their inherently great depth of field testify to the success of this technique.
Some cameras have the DOF scale not on lens barrel, but on focusing knob or dial; for example, the Rolleiflex TLR has its DOF scale on the focusing knob; the subminiature camera Tessina has DOF a scale on the focusing dial. Source: Internet
Subminiature camera main Cameras taking film significantly smaller than 35 mm were made. Source: Internet
Subminiature CV4501 tube (SQ version of EF72), 35 mm long x 10 mm diameter (excluding leads) Miniature tubes Early tubes used a metal or glass envelope atop an insulating bakelite base. Source: Internet
Subminiature tubes were produced using wire leads rather than sockets, however these were restricted to rather specialized applications. Source: Internet
Similarly, for subminiature photography (for example Tessina) with a frame format of 14x21mm, 8x12 inches corresponds to 14.5X enlargement, hence circle of confusion limit about 0.017 mm. Source: Internet