[g__day (Matthew)]

Wondering what this could be - it was in the very top of my camera when I did a test imaging run tonight - there is nothing on the telescope lens - it is pristine.

Took the camera out (ZWO 1600MM-c) its lens is clear.

Their is a filter wheel in the light path (ZWO - all the holes for mounting seem well covered - and there is little stray light in my astro lab). Several filters need a careful clean - maybe this weekend.

But when I put the camera back on to the filter the obstruction had shifted from the upper top left to the bottom middle third of my gear.

Not the sort of thing I want to action in the dark - wondering how it got there and how it is moving.

I will remove my filterwheel and look to see if there is a hair or cobweb or something, somehow in the light path near the camera.

Anyone seen anything like this - it wasn't at all apparent two days ago!

* * * *

A further interesting fact - it doesn't seem to be on my Red, Oxygen of Sulphur filters - so I guess that narrows it down to something may have fallen onto my Luminance filter = wow!