|
When you look into the focused tube with your pin hole (assuming that is centred) do you see the mirror centre mark offset toward the front as per Astrobaby's photos for fast scopes? Did you alter the centre screw on the secondary - that controls offset distance as well as locking function?
Another thing is that not all lasers are properly collimated themselves, the way to tell is to put it in a level cradle (crossed nail supports in a piece of timber will do) and rotate it while aimed at a target at about three or more metres away. If the red spot stays with a tight circle of say 1cm then it is OK. If the laser wanders around it is not collimated and you may have to use the adjustment screws to centre the beam. Where did you get the laser or what brand is it?
BTW if you drop a laser on the ground, table, etc it can get knocked out of collimation.
Do you have a Cheshire tube?
|