Quote:
Originally Posted by Merlin66
Lars,
I was really responding to Pete's comment.
The usual inbuilt filters in DSLR should normally be sufficient to suppress UV bloat.
I have to add a UV-IR filter to my fully FULL (both filters removed) modded 1000D if I do any "general" star field imaging with various Zuiko lenses.
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Hi Ken - my main imaging DSLR is astro-modded rather than full spectrum so it cuts off most of the UV anyway. I did run a 'test' with the front UV filter still attached (I forgot to remove it) and ended up with weird double images of most of the bright stars 😆.
Here is another image I took of the Southern Cross with the aperture stopped stopped down to f-4. I did a fair bit of work in post to remove the worst of the violet halos but you can still see them (this one was with the un-modded DSLR).
https://www.astrobin.com/full/187395/0/
I now use a 3D-printed aperture mask which runs the lens at f-6 and doesn't give me spikes around bright stars.