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collimation (?)

Started by lthaxton, 09/12/2002 04:54AM
Posted 09/12/2002 04:54AM Opening Post
I am experiencing a plume of light on stars and planets in my 12.5 inch F/4. It appears as a tail on stars and a blob of light on planets. On either object it is only in one portion of the image and not a uniform halo surrounding the object. Collimation problem? If so, a suggested cure, i.e. secondary or primary adjustment (both??).