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hey mate, one more favour, make sure the star, not quite as bright as sirius, centre it right in the middle of the field of view and defocus a small way out and take a few short intervals images. then defocus inwards and then take a few images.
ideally that sirius shoud be round, not flairing from say 7 oclock to 12 oclock.
just would like to confirm the collimation against the laser
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