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What I men is that the rings are not concentric but slightly like a cone. The first one is round and they become slightly more elongated as they go. This is at the centre of field of view. As I move away from the centre they become worse. I have done it before where the rings were concentric at the centre but not as moved away from the centre. This time I'm not that close. Last time it was just a fluke and I only did it with a laser. I know I'm out because the stars don't look simmetrical (if you know what I mean). I have been trying to avoid this subject for a while but I can become a bit obsesive at times and when I have an itch I cant't stop scratching till it's gone.
Regards Cristian
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