Hi,

Lately I have been having problems with flats (see the effect of secondary mirror, reflections) and have tried to investigate the cause.
My gear is C8, JMI focuser, Optec 0.5X reducer, ZWO filter wheel (5 position), SXV-694 camera.
Last night I took the camera away and looked while using flat light, and I clearly see light coming from the small holes next to filters.
Could this be the problem and is anyone else having same kind of problems ?

Please help.

I didn't find the right solution from the Internet.

References:-
bbs.astronomy-imaging-camera.com/viewtopic.php?f=8&t=7982
Motion graphics animation service

Thanks!