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Ok, so today I pulled the mirror out to see what was going on. Found that the mirror was free to move around the cell in a circular pattern, with about 1mm gap between the mirror and the cell. The rubber clips were also quite loose.
I put a bead of silicone around the cell and replaced the mirror, also tightened up the rubbers, but they are only resting on the mirror, not pushing down, they can still move freely when wiggled.
Did a rough collimation in the daylight, and tweaked the secondary mirror a touch.
So went out tonight and collimated properly using the Glatter Laser collimator.
I'm pretty happy with the silicone, now when I can move the scope in almost any direction and the collimation stays spot on, according to the laser, nothing moves. Before when I used to move the scope, you could see the laser spot shift.
Tried to get some photos of the star test, but they are not fantastic. Visually everything looked really good except for a bit of "wobblyness" around the edge of the star.
Attached are some photos:
Focused out on star
Loose rubber clip
Loose rubber clip
Tightened Rubber clip
Focused in
Focused in
What do you guys think?
Erik.
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