weird ringed artifacts in my images

[labtech1122]

ive had a play and managed to get 87mm BF, thats the minimum i can get with the bits i have. the only issue is instead of the t2 adpter its on a 1 1/4" t-piece. will the smaller ID result in less light to the sensor?

[Adam J]

On 19/02/2023 at 09:07, labtech1122 said:

Hi, I'm wondering if any one can help me,

I've just started imaging through my telescope and keep getting a very strange set of rings on my images with bright stars, the rings move around and change position depending what angle the camera is at.

also the stars at the edges look like they are trailing or out of collimation or out of focus or something. 

im using a celestron nexstar 6slt with antares x0.63 focual reducer, sc -tpiece and canon 650D. 60mm guide scope with svbony sv305pro to guide

I've been racking my brain a lot about this and really need help. DSS wont stack them because it cant see stars and when I got it to stack a couple of images it didnt actually align the images it just put them one on top of the other.

blue ring (2).CR2 21.26 MB · 13 downloads blue ring (3).CR2 21.45 MB · 7 downloads blue ring (4).CR2 21.55 MB · 7 downloads blue ring.CR2 21.53 MB · 6 downloads

Its a reflection from a curved surface from the sensor or the filter. You can tell as its distorted and offset from the star. The reducer would be the primary culprit for me. 

Adam 

[labtech1122]

1 hour ago, Adam J said:

Its a reflection from a curved surface from the sensor or the filter. You can tell as its distorted and offset from the star. The reducer would be the primary culprit for me. 

Adam 

Are there easy ways of removing it or is it a job for post processing?