ASI ZWO 178 cleaning

francesco

Good afternoon
I ave a ZWO ASI MC 178 where I found ( ASIAIR connected ) problems on the screen maybe due to dust . But after accurate cleaning the problem is still present . I don’t think it is due to dust but something else which I am not able to remove.
can you kindly help me ?
thanks Francesco

Tech@ZWO

francesco Remove the camera from the telescope to see if it still remains.
In addition, can you see it on the camera with your naked eye?

francesco

@tech@zwo#57066 I Removed from telescope and changed with other camera ( 120 MM-S) : problem disappears; so far the problem is in the 178 camera. I checked at naked eye but I CANNOT SEE ANYTHING ON THE SENSOR ( NO DUST OR ITHER STUFF ) . This is the reason for which I wrote in the forum . Thanks for quick feedback, I hope you can help me
thanks
Francesco

Tech@ZWO

francesco Please remove the camera from the telescope to shoot a flat frame, and send us the raw image. If the image is too large, you can share it via google drive or others.

francesco

@tech@zwo#57070 thanks for attention to my problem. Attached to pictures ( flat ) :
1) with ASI 178 on telescope Celestron 127 slt
2) with ASI 178 on telescope skywatcher 150/750

you can see the same defect ( difference shape due to different optics) in the SAME POSITION
I presume the defect is on ASI 178
What is your opinion ?