CameraControl.focalLength Redirect 1

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This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

This API is available on Firefox OS for certified applications only.


The focalLength property value is a read-only property that returns a number that expresses the camera's focal length in millimeters.


var focal = instanceOfCameraControl.focalLength


Return a number representing the camera's focal length in millimeters.


var options = {
  camera: navigator.mozCameras.getListOfCameras()[0]
function onSuccess( camera ) {
  var focal = camera.focalLength;

  console.log("The camera's focal length is: " + focal + "mm");

navigator.mozCameras.getCamera(options, onSuccess)


Not part of any specification; however, this API should be removed when the WebRTC Capture and Stream API has been implemented.

See also

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 Last updated by: Sheppy,