Quote:
Originally Posted by Shiraz
However, it is also possible that the light column may be intercepting the tube on one side. If this is the case, the most likely cause is that the secondary is too far in/out. This is nigh on impossible to get right by eye with a fast Newt - you can collimate it perfectly, but the light column may still not be exactly central.
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Hello Ray,
Based on the collimation photos, there is not vignetting. Had there been vignetting by the OTA opening edge then the intruding OTA edge reflection would have appeared in the primary mirror.
Jason