Takahashi FSQ-85EDX- 1.0X Flattener and Chroma 3nm SHO Filter HALOS -SII

As I stated in the other post about the FSQ-85EDX, mine was an earlier version, just the FSQ-85ED, and I never had any issues with halos or the hourglass effect
on any stars. I also use Chroma 3nm SHO filters as well with no halos, so it must be in the design of the EDX, and or the flatteners or reducers as I can also see the hourglass effect on the two bright stars in your image as well. I don't think the halos are filter related.

Just a thought.

I have the same setup with FSQ-85 ED, 1.01 reducer and Chroma 3nm SHO filters, and get the same “inverse lighthouse“ effect.  I contacted Takahashi America in Houston, spoke with a gentleman who owns two FSQ-85s and was told that pattern is due to diffraction and is intrinsic to the Petzval design.

yes the light house  on very bright stars is a takahashi signature or pattern 
 the problem is with the halos around the bright stars only SII