Great stuff David.
The central structure that you have captured is visible in my 12.5" dob at high powers, actually I was pointing this out to Mark (mhodson) last night. At the eyepiece the contrast between the outer disk and this inner "CBS Eye" is much more sublte, but is certainly visible when you know what to look for. Challenge for people - how small an apeture is this feature visible in?
Again, great shot mate!!!
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