Indicates what lens mount the camera has.
Controls the amount of light reaching the film or light sensor. Cameras that don't have an aperture ring often have an electronic control to adjust the aperture.
Depth of Field Scale
Indicates how much of the subject will be in focus.
Indicates the distance from the subject.
Used to focus on the subject when in manual mode.
A threaded ring to attach filters.
A threaded ring at the front of the lens for attaching filters.
For adjusting the focal length.