Quote:
Originally Posted by AnakChan
Funny you're asking about filters today. Just last night. I was doing a comparison test of the different filters I have (IDAS LPS-HEUIBII/D1/D2/V4/NB2-PM/NB3-PM, STC DuoNarrowband). Despite being quarter moon, I did take them after it set.
I don't think my streetlights had changed to LED yet. As you can see the D2, has a greenish tinge.
Hope this helps you.
Helix Nebula
Takahashi µ250CRS (2500mm focal length, F10)
CentralDS Astro A7S (modified cooled A7S - sensor temp approx -5 to -6C)
ISO2000
300 sec subs
Approx Bortle 5 skies (Perth central suburbs)
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Thanks mate, this is very helpful, I'm also imaging in Bortle 5. I used a Baader UHCS for the Helix a few weeks back, it casts blue over everything but I can remove it in post and restore fairly natural colours. What I can't do with it is image reflection and dark nebs, and remove moonglow (and probably LED).
I wonder what the difference would be in your testing with my unmodified dslr? This gives me pause on the D2. Maybe I should just go with the moon and skyglow filter instead, which seems to get used a fair bit by others. Have you taken other images with the D2?
Thanks again - very timely testing from my point of view!
Clear skies