Pixinsight - grid lines after DBE

[Viv]

Hi all,

had my first try at Andromeda this week.

its not a great image, ISO was far too high at 1000, so I could do shorter subs (trying to image without guiding). Anyhow managed 94 subs,in total.

When processing in Pixinsight, I'm getting grid lines on the image, following DBE process.

is it happening, because the image is so noisy ? Or am I doing something very silly ?

thank you

ps - image below, only an iPad screen shot of it so far........

[Tim]

Hi Viv

Not sure about your pattern, perhaps it is the legendary Canon Banding Issue? I dont know anything about that, except there is a tool in PI to help with it, if indeed that is the problem.

Tim

[Viv]

Hello ??

hope you are well

thank you, I'll have a search & try that.

got a single 20 min sub tonight too, so will do that & compare

cheers much x