title: Changing iphone camera ISO max value
body: <p>I'm trying to change the ISO max value of my iphone during an AVCaptureSession.  I can not find an accessor to this ISO max value and its capped at 736 for the iPhone I am using.  However if I download NightCap Pro off the App Store which reports the ISO value in real time, it reports a max of 2000 when i cover up the camera lens with my thumb.  My question is:  how is this app resetting the maxISO or are they just using 2000 as an index because all maxISO values will be different from device to device?  </p>
  
  <p>Its odd because even if the latter is true, their picture is brighter than mine at a faster shutter speed of 1/14s while mine is 1/6s.</p>