I hope someone can help me with the following issue. It seems during collimation with my laser and barlow, when aligning the secondary mirror first with my laser collimator, the laser beam will stay in it's place no matter which way i move the scope.
However when it comes to adjusting the primary mirror with my laser and barlow, the returning circle beam seems to shift position as I move the scope around
http://www.cloudynights.com/ubbthrea...lins/frown.gif
I've checked the trusses are tight on... I'm not sure if the primary mirror is actually moving around despite been bolted on tight?
Any help would be greatly appreciated, thank you.