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Aligning scope with Magnetic Declination


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I have been reading a bit about true north and magnetic north and how aligning my mount taking magnetic declination into account will help.

So my declination is 1.41 degrees west.

Two questions.

If I was to set my compass to this magnetic declination, I need to rotate the red arrow 1.4 degrees to the left and then light that up with the compass pointer and point my north tripod leg in that direction?

Is 1.41 degrees going to make that much difference? Not sure I can adjust my compass with that degree (sorry) of accuracy.

I may be approaching this all the wrong way. I can see how a mag dec of 10 degrees might make a bit of difference, but we seem quite close here in Gloucester!

I used this site to check.

http://www.ngdc.noaa.gov/geomag-web/#declination

Cheers

Mark

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