Key Features and Specs:
Film: Originally 116 film (obsolete). It is possible to use 120 film with adapters.
Shutter: Kodex No. 1 or Kodak Ball Bearing shutter (speeds: T, B, 1/25, 1/50, or 1/100).
Lens: Typically a Kodar 122mm f/7.8 or meniscus achromatic lens.
Apertures: "1" to "4" (early) or f/7.9 to f/22 (later).
Focusing: Zone focusing by moving the lens carriage along a bed with markings for 8, 25, or 100 feet.
Key Considerations: Autographic Feature: A metal door on the back allowed a metal stylus to write on the film's paper backing, exposing it through the red window. Light Leaks: The autographic door and the film advance window often allow light leaks; using black tape over the window is advised. Using 120 Film: Requires special adapters to hold the smaller 120 spool, resulting in fewer, larger images