Quote:
Originally Posted by matlud
A great image Marcus! Interesting your baffle gave additional reflections -I haven't had any luck with painting reflective anodised surfaces black either, even with ultra black paints and use adhesive velour now. Drives me a bit crazy that manufacturers make components that are in the optical train with reflective surfaces and we have to trouble shoot this sort of issue.
|
Thanks very much Mathew!
As far as the baffling goes, see the images below - the original OS baffle was supplied in 2014 after discussion of spurious light arcs appearing in my images. The 3-D printed baffle they sent me attaches to the end of the primary baffle. It was
very effective at preventing off-axis light striking the corrector lens in front of the prime focus causing light arcs. It also darkened the sky in test images. Alas, it also caused noticeably larger and brighter halos around the brighter stars.
After painting recently (now much blacker) the surface of the baffle is somewhat rougher and now produces diffraction rings around brighter stars. as per the 3rd image below.
Quote:
Originally Posted by Retrograde
A wonderfully detailed image with great colours.
I hope that's the last of the gremlins for a while!
|
Thankyou Pete! I hope so.
As far as gremlins go, the biggest one - ME - certainly won't be experimenting on a clear imaging night again!!