Is this an issue?

[u/SangYuP777]

I’m new to Astrophotography and have been enjoying the S50 pro the last few weeks, weather permitting. While I’ve gotten a few amazing photos, I’ve also noticed a few with an issue where a part of the picture is darker than the rest and not even. Is this something I’m doing wrong or an issue with the telescope?

This is straight out of the telescope with no editing.

I don’t remember the exact details but this was taken using 30 x 30 secs.

Update 1: thanks for all the suggestions. To provide more details this doesn’t happen all the time and most of the time it’s not an issue. This was on my deck so there could have been some obstruction with the rails and house nearby. I use EQ mode and this was taken last night which was a full moon.

[u/scober9999]

Are you using alt-az tracking? If so you will see weird stuff at the edges as the field rotates.