A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Frank Reed
Date: 2015 Aug 10, 18:52 -0700
"I tried using Ursa Major and found that either I made some mistakes or the iphone 5 optics produce a miserably distorted field (at least for CN). "
Could you upload the photo that you're trying to calibrate and also the time, date, location for it?