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Hey guys
How important is it for the mask to be perfectly centred (in relation to the primary mirror / lens)? I've fitted my 10" mask to the newtonian, and when I look through the focuser - the centre lines of the mask do not line up perfectly with my secondary vanes - indicating she's off perhaps 5mm.
What's the science behind it? Will this be fine, and make no difference? Or should I re-drill?
Cheers.
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