This was pure trial.



The circles that showed up had to GO.


Standard QHY masks.



3Rd party filter masks all over the filter seat and hole this is the filters out so I could paint the interior, the small circles went as unlike the supplied masks they covered the whole of the hole no lights leaks down the side of the filters and a new interior paint job that reflected no light.






First show just how bright the inside of the filter wheel really is. I was told get some Musou Black and paint the two inside parts of the case.

A nights trial no small circles any where in the RGB stars or the Oii NB filter. But there remained a big circle in the middle. Musou Black Its an unearthly black to look at as it absorbs 98% of the light so no reflections



I raked my brain where is there a large circle. I could only find one just inside the top of the scope there is a 40mm Black plastic ring for the cover to sit on over the time it has got highly polished. Reflecting the light for the street lights or the moon down to the mirror. Only answer is Flock it a velvet like paper that is self adhesive.



I did each night remove the previous nights stacked files so I could see the result of the new work that was done. The end result was every one of the circles where no more. I cant wait till the 16th of this month I have till the 23 rd to shoot LRGB MOON free and see once and for all can I finally do a clean coloured photo from filters. Has all this work paid off the RGB shot it did showed no marks the stars in this shot showed no marks so it all looks very promising. stay tuned! This was A lot of thinking, a lot of clouds from the cyclone and the rain I brought the scope inside.

QHY268M -10c 4 days 5 min SHaO 70 odd shot each , 40 shots each RGB 1 min exposure.
QHYCFW3 and 7 Antlia filters LRGBSHaO
ZWOCAA rotator
MeLE Mini PC
Pegasus Astro Pocket Mini power box
Starpoint Australis SP3 Focuser
Skywatcher 200 F4 PREMIUM PHOTO QUATTRO REFLECTOR OTA
Skywatcher F4 Aplanatic Coma Corrector
Skywatcher NEQ 6 Pro Hypertuned
SVbony 50MM Guide scope
ToupTek G3m Guide camera
Guided PHD2, Nina
Pixinsight, Ps