Quote:
Originally Posted by lacad01
Thanks for the handy info Greg, will have to try that next opportunity. As my eyes for close-up are pretty crap, I can't read that lattitude marker on the side, even with reading glasses on  so I use a couple of iPhone apps for levelling, lattitude and south setting which works a treat. |
http://support.apple.com/kb/TS2767
The built-in digital compass works just like a magnetic-needle compass. The accuracy of digital compass headings can be affected by magnetic or other environmental interference, including interference caused by proximity to the magnets contained in the iPhone earbuds. The compass may need to be calibrated from time to time.
When the device displays the calibration alert, rotate the device in a figure 8 motion until the calibration screen disappears. The digital compass should only be used for basic navigation assistance and should not be solely relied upon to determine precise locations, proximity, distance, or direction.
The Polarie has motors therefore it has magnets. Same goes for the device that fits in the finder and the little ball compass located inside.
I have a 0.1 degree inclinometer, sounds similar to Greg's that I also got from an ebay store for $26.
There must be a better way to do the compass setting.
Joe