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On topic but a bit off thread. My colimination of the 12" secondary seems to be quite difficult, does the secondary mirror go offline easily and need resetting?
If not what would be the cause?
Could temperature changes cause the offset?
I have inadvertantly altered al-be-it very very slightly the spider vein as they seemed a bit loose from new. What kind of accuracy does the spider veins need to be in?
I must admit the collimination of the 12" is better than the SEBEN I have and the 12" does centre on the target as well.
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