RF 15-35mm Moiré pattern when stacking multiple night shots.

[CarmenT]

I have noticed this problem several times now with night shots taken on this lens when stacking multiple images in either StarStax of Starry Landscape Stacker (sequator). The water area gets a very weird pattern/texture in it which is not present in any of the single images. Does anyone know what could be causing this? Is it a lens or software issue? Thank you for any suggestions as to what the problem could be. 

[CarmenT]

Thank you! Those are useful suggestions. I do have all enhancements turned off in camera but did apply some basics edits before stacking so will retry with the images as SOOC. 

[CarmenT]

No edits before stacking has helped a lot! Thank you for that tip.

[Peter]

What I thought, see the answer from John Sheehy https://www.dpreview.com/forums/thread/4685233

[jrhoffman75]

If you are using Lightroom processed images then it is a Peter says - lens correction is turned on. I found the same issue. It may also happen with other processing software, but I only have experience with Lightroom.

[Waddizzle]

If Image Stabilization is enabled, turn it off.

[CarmenT]

Thank you, Image Stabilization was turned off. 

[ebiggs1]

Basically what we are all saying is just use the unmolested raw image. Then do any edits you see fit after stacking.

I, too, now only use Lightroom.