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Glint on my SW N150/750 images !!!

QHYCCD QHY163M Equipment NGC6205 M13 Artifacts
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Yin_Zhen avatar
Yin_Zhen avatar
Hello
A glint is rotting some of my pictures. It is present with some targets and absent with others. It does not move during the acquisitions, even accumulated over several nights.
My best hypothesis is that of a reflection on the branches of the spider. That said, I have other SkyWatcher newtons and they do not have this problem. I had this same newton years ago and it did not have this problem either.
Tube: newton Skywatcher 150/750 with passive fog shield, insulating foam and aluminum tape on the back of the secondary mirror. Focuser upgrade: https://www.pierro-astro.com/materiel-astronomique/accessoires-astronomie/mise-au-point-focus/porte-oculaires-2-%C3%A0-cr%C3%A9maill%C3%A8re-pour-newton-sky-watcher-kepler_detail
Corrector : TS MaxField x0.95
Camera : QHY163M
Below, an example on M13 :

Thanks in advance if you have a better explanation!

Translated with www.DeepL.com/Translator (free version)
Dmitrijus Tiazlovas avatar
Dmitrijus Tiazlovas avatar
Hello, I've had similar looking halos when there was light going through the back of the scope. With the back of the mirror exposed my laptop and other equipment would shine through and create horizontal artifacts in my images. Perhaps not your scenario, but maybe something worth checking.
Well Written Concise
Yin_Zhen avatar
Yin_Zhen avatar
Dmitrijus Tiazlovas:
Hello, I've had similar looking halos when there was light going through the back of the scope. With the back of the mirror exposed my laptop and other equipment would shine through and create horizontal artifacts in my images. Perhaps not your scenario, but maybe something worth checking.

Thanks !
Usually, the cover of my laptop is closed. However, it is a good idea to close the back of the scope.
Dan Brown avatar
Dan Brown avatar
Try taking darks in an illuminated room to check for light leaks.
Dan