Quote:
Originally Posted by silv
Hey,
1. polar alignment - in the southern hemisphere....
2. rotating the rod:
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Hi Silv.
I think I can answer a few questions for you.
1.
a) For your location, no. Auckland has a magnetic deviation from "True" south of 19 degrees, 26 mins EAST of magnetic south, you will need to compensate. I used this site:
http://magnetic-declination.com/
b) Yes, must match your latitude as close as you can get it (protractor and a plumb-bob should be sufficient for widefield.
c) Drift align may be overkill, depends on what FL(Focal length) you will be shooting. I suspect your curved rod may introduce more errors than your alignment will.
2.
Google Image search is sometimes a much better way to find site's.
I found these that may help you:
http://www.garyseronik.com/?q=node/52
http://homepages.nildram.co.uk/~sbun...principles.htm
http://slscope.co.uk/astro_projects/...barn_door.html
http://www.cloudynights.com/ubbthrea...7/Main/4785285
Using this search:
http://www.google.com.au/search?hl=e...HemKmQWJmMHYDg
Have Fun!
