I bought a real Auto Collimator & now know why they work so well .
If you have ever been to a fun park were they have a hall of mirrors and you check your reflection in the mirror your looking at whilst seeing the one behind you , what do you see ? multiple reflections .
Because those mirrors have a tilt .
Now if they were perfectly aligned with no tilt You would not see your reflection ' that's what the Auto Collimator doe's .
You go from a bright reflection to a dark one when your scope is spot on !
But you will need to centre mark your secondary before this to get those earlier adjustments extra close .
After you have used your best tools ( lasers included ) to get what you think is spot on , then use the auto collimator for perfection .
Have Fun
Bobby
