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Celestron Edge HD 8 artifact

Celestron EdgeHD 8"
2 replies•79 views
Abdul Thomas Jnr avatar
Abdul Thomas Jnr avatar

Does anyone know what causing this artifact? As you can see i manage to get rid of it during processing but will still like to know what's causing it.

Celestron Edge HD 8 and Zwo 294mm pro

NGC 6791 under bortle 4 skies

Thanks in advance 📷 86951.jpg86951.jpg📷 86952.jpg86952.jpg📷 86953.jpg86953.jpg

Jeff Bennett avatar
Jeff Bennett avatar

light leak? Bad backspacing distance?

Abdul Thomas Jnr avatar
Abdul Thomas Jnr avatar

Yeah could be. I will double check