[srmnm (Will)]

Hello All!!


I purchased a RASA 8" and have used it twice, first time really to get a polar alignment done (which i really struggled with on my NexStar8se on the wedge) and the second time to actually take pictures with ZWO ASI1600mm.

Once polar aligned (second time i used) and in focus I took many light frames of the Horsehead Nebula. Once my session was completed, i performed an auto-stretch in Pixinsight and was surprised upon close examination to find that one side of the frame seemed to be in perfect focus but the other side was not.

There is quite a difference and I'm a little confused as to why this has happened on a new OTA. Could it be a factory defect? OTA needing immediate collimation? (Sounds like this shouldnt happen according to the Technical Instruction Manual) or Camera issues, not sure how?

Any info please have to share would be greatly appreciated?

Please see attached for images showing examples.

Thank you,
Will