Orifice coupling

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The aperture coupling is a term in camera technology for the coupling functionality of the camera housing and lens , and can mean several things :

  1. a simple diaphragm actuation being, for example, the closing of the generally open aperture for the purpose of measurement before a recording or at the time of recording,
  2. A transmission of the preset aperture value to the camera housing so that the evaluation electronics receive information about how much the light will be reduced at the time of recording, with which the electronics are then able to set a suitable shutter speed (automatic shutter speed),
  3. an analog influence on the aperture for the purpose of regulation with a fixed recording time (sports photography with short exposure times), or with a program control. Or. the mechanical realization that a preselected closed on the lens aperture in recording time by the necessary amount is closed only exactly the proper exposure is obtained.

The term diaphragm coupling is therefore ambiguous or fuzzy in terms of control technology: it can

  1. be the transmission of sensor information, or
  2. be an actuator, i.e. an actuation of the panel according to a given logic.

See also: Open aperture measurement