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Old 06-10-2019, 01:00 PM
AnakChan (Sean)
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AnakChan is offline
 
Join Date: Sep 2014
Location: Perth
Posts: 109
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 250CRS (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)
Attached Thumbnails
Click for full-size image (HEUIBII.jpg)
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Click for full-size image (LPS-D1.jpg)
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Click for full-size image (LPS-D2.jpg)
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Click for full-size image (LPS-V4.jpg)
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Click for full-size image (STCDuoNB.jpg)
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Click for full-size image (NB2-PM.jpg)
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Click for full-size image (NB3-PM.jpg)
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