S30 bad image in upper left corner

B34478v3

Hello, I am getting poor images in the upper left corner in some but nor all stacks.
I havel leveled the scope and work in alt-az. A sample is attached. Am I doing something wrong? or is the tracking and stacking not working correctly?

thank you!

Tech@ZWO

Hi there,Could you provide me a single frame image.And you could try turning off the single-frame saving function and only use live stacking to see if your image works properly.

B34478v3

Hello, The images sent in the first message were stacked only - I did not save the individual frames.

I made a set tonight in poor conditions - clouds coming in. But I think you can see distorted faint stars in the upper left of the single frame . I have included a stacked image as well. A denoised version removed the faint stars.

This set was made using the default LPR filter - perhaps that is related?

If you want I can make another set with individual frame when the weather clears.

thanks

btw I had to copy the single frame and reduce its size so that this site would accept it.

Tech@ZWO

B34478v3
Hi,please you Turn off the live shooting function → No stacking will be performed, and all single-frame images will be saved as they are.Take approximately 30 photos, then send the original images to my email. I will analyze the cause, and thank you for your cooperation.My email is Joye.Zheng@zwoastro.com

Lilo

Looks like tilted sensor or lens.

B34478v3

Sent email with files