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Thread: Skywatcher 150mm dobsonian collimation screws

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    Default Skywatcher 150mm dobsonian collimation screws



    Owner of used Skywaycher 150mm Dob

    Bought used and waited for cheshire eyepeice to be delivered before collimation.
    Once it arrived I was confident I could collimate easily after reading and watchign videos.

    Immediately I have a problem...when attempting to collimate the secondary mirror I realised some numbty has totaly rounded all 3 hex grub screws.They are recessed and I'm stuck on how to remove them and replace with nnew grubscrews.

    Any advice would be welcome

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    Default Re: Skywatcher 150mm dobsonian collimation screws

    Can you turn the center screw holding the secondary in place?
    If you loosen/ remove the secondary for now it may release some pressure on the grub screws so they can be removed and replaced.
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