Just noticed horizontal banding whilst editing some night shots .

The settings where f8 30s exp and iso 400. I also had long exp NR set. I took another at iso 200 and same banding. It seems to be most evident when the night sky is particularly dark. iso 100 also but to lesser extent.

Tried Topaz denoise but its still there (lesser degree).

here is the equalised image.

Appreciate any thoughts

Attachment 9716

I am going to do some astro shots later this week so am going to try various combinations to see what happens.

Cheers Tony