Quote:
Originally Posted by blink138
whats this metaguide then? i am a bit scared of trying to collimate my c11 and it is well out of wack i think!
i bought the hubble 5 star a few weeks ago and set it up inside my house, i think it was a mile out and i think i got it closer
pat
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You shouldnt be scared Pat! Although Dunk can vouch for me being petrified at the prospect of collimation at first as well!
Basically you view a in-focus star through a 4x powermate or barlow/equivalent with a webcam/planetary/guide cam (not a DSLR) and Metaguide stacks 10 or more frames continuously to form a live video of said star, but because it is stacking it the seeing doesnt matter anywhere near as much. Then you adjust screws until the star looks like a perfect dart board.
I have a hubble. It is only useful for coarse collimation (ie making sure the secondary is roughly centered in out of focus star image to form a donut). As such it is pointless, because that is super easy to achieve anyway with any star under any conditions (except for clouds
).