What have they done?

[LostInSp_ce]

I finally got my scope back after loaning it to some friends for a few months. However, last night when taking some subs I noticed that the stars are no longer round. Concerned, I thought I'd do a star test and this is what I saw. Yuck! Is there a misalignment somewhere within the imaging train or have my buddies destroyed my once well collimated APO refractor?

[doppler (Rick)]

Unscrew the front cell and have a look down the tube, I recently had a baffle ring come adrift in one of my refractors and it caused a similar problem.

[LostInSp_ce]

Thanks Rick for the quick reply I just checked it now and it seems that my buddies have played a practical joke on me. They've lined the inside of my hood with an irregular shape creating a mask. It was just a tiny bit of 3 mm EVA placed deeply into the hood very cleverly done. No damage to the optics and everything is back to normal at least so I think. Lesson learned never let family or friends touch the goods.