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Stacked image issue


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Hi, 

does anyone know what these faint red blue and green  'L' shaped lines in the attached image are?

And more importantly how to get rid of them.

1567884542_StraightUp02-11-21(3).thumb.jpg.9f2bbacb934c1416cd52cfe8997e3068.jpg

They are a uniform shape and size and all across the frame.

I don't seem to get these lines on single images, at least I can't see them. 

I have tried stacking through both Deep Sky Stacker and Sequator, and even used a different laptop but with the same result. 

The pictures were taken on a Canon EOS 450D through a Skywatcher 200P mounted on a EQ5 Pro.

The mirrors seem ok and I don't have any issues when visually observing.

Any help and advise gratefully received.

Thanks

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If you are using Deep Sky Stacker you may need rather more lights (25+) for the Sigma Clip stacking algorithm to work.  

If you are guiding (not sure from your equipment list) dithering may also help, although again you need quite a few lights otherwise you get a cloud of coloured dots rather than a line.

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Thank you for your replies, it did seen to be 'hot pixels'. 

I adjusted the settings on DSS and they disappeared.

I used those settings to stack the Orion Nebula I took last week.

Thank you again for your help.

1748065169_OrionNebula13-01-22HotPixelsRemoved(3).thumb.JPG.fd01cc510f2397bd034a7700ccf339fd.JPG

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