[m11 (Mel)]

Hi All,

Just recently acquired a Howie Glatter 635nm laser collimator.
Doing some research online on how to use it but still unclear for me.
I have an Orion Lasermate that I do the primary and secondary. The Glatter collimator does not have the concentric circles to for when adjusting the primary from behind my dobsonian?
Can I please ask if anyone has some links or info regarding using this collimator to align for primary and secondary?

Thanks,