QHY600 - Lines through stars

[Midnight_lightning]

Does anyone have any thoughts as to what is going on here?

I have been having trouble with reflections on bright stars (Lum/Blue) and on advice reversed the orientation of my Chroma filters. This significantly reduced the reflection but I then have these lines through bright stars on all filters, including 3nm NB.

 

 

[andrew s]

Looks  like  diffraction . What kit do you have? Anything crossing  or intruding into the optical path? Regards Andrew 

[Midnight_lightning]

135mm Refractor and Riccardi M82 0.75 reducer. I will strip it down today and check the optical path. 

[vlaiv]

Check out this recent discussion:

 

[Adam1234]

Do you have any telegraph poles near you? I have seen the same effect on some of my subs when the lines get in the way of my view. 

[Midnight_lightning]

Sorry chaps, a bit of a howler 😩.

a panel pin I was using to hold paper over my light panel must have come loose and dropped into the dew shield and ended up  leant against the objective lens. Removed panel pin and lines have gone.

at least it’s resolved 😳

[andrew s]

Glad it's fixed. Regards Andrew