Quote:
Originally Posted by Starkler
What a uhc filter does is to darken the sky background by filtering out everything but a small band of wavelengths of light, which emission and planetary nebulae radiate in. If you cant get good dark adaptation for your eyes, the usefulness of a uhc filter will be limited.
What can help in such situation is to drape a cloth over your head to block any extraneous local light. I find this a help even at dark sites when viewing very faint objects.
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Thanks, actually by keeping my head below the fence line, I avoid any direct view of the neighbours lights, so dark adaptation isn't too bad. I shall try with a cloth over my head though - will help keep warm!
I was wondering more whether the UHC would improve contrast much with a fairly dark sky? For instance, when dark adapted I can see a small faint fuzz where the lagoon nebula is (dunno whether I'm seeing the nebula, the cluster, brighter patch of the milky way or imagining it, but I can use it to point the scope in the right place).