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Hi Jay, Could be collimation. Check view of out of focus star and see if the shadow of the secondary is central to the primary. Make sure you view this when the out of focus star is central in the field of view. Also good to have the OTA near to outside ambient temperature when doing this or any high magnification viewing. Collimation is very easy on these scopes, I rarely have to adjust mine.
Also to add apply the mirror lock to help keep the primary from tilting when viewing for collimation.
All the best.
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