[Cluster]

Hi,

Today I received a GSO laser collimator for my GSO 6" reflector. I've turned it on and did a simple roll test (roll across the end of a desk) and it seems to be in a straight line. I'll do a V wedge test later. Turning the collimator in the focus tube shows a tiny deviation from dead center (about 1 or 2 mm on the primary mirror).

The main question is, the laser doesn't come to a point when shone on the wall. At about 2 metres away it's a slit about 4mm wide. On my telescope's primary mirror it's very difficult to tell if it's in the center of the mirror as the laser is so broad. I think I have achieved collimation of the primary and secondary as the return laser beam is bang on target in the collimator.

When I pointed the laser collimator through my GSO 3x ED barlow, collimation was a bit off but not too bad (in my opinion). Is the laser point (it was pretty large, about 2cm across) meant to be dead bang in the center of the primary mirror?

Unfortunately it's very windy outside so I can't do a star test tonight.

Do the three Allen key holes in the GSO collimator just move the beam, or do they adjust the focus of the beam itself?

GSO did not provide any instructions with the collimator. I think that's a bit slack.

Thanks,