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I have been trying really hard to collimate my new Skywatcher 200/1200 Dobsonian and after trying for several days (:)), this is the best I have managed to achieve so far. I know that it's not perfect but could you please let me know if this is adequate or do you think I need to make some further adjustments (and, if so, please let me know which ones)?
The mirror configuration is the same in all three photos but it might look slightly different due to the parallax error.